国際会議 / International Conferences

1. Z. He, M. Bouazizi, and T. Ohtsuki, "A CSI-based Cross-subject Transfer Learning Method Using Network Freezing,'' IEEE Global Communications Conference (GLOBECOM2024), Cape Town, South Africa, Dec. 2024. (Accepted).

2. X. Shi, M. Bouazizi, and T. Ohtsuki, "Rough-to-Fine Model-based Non-contact Heart Rate Estimation using MIMO FMCW Radar,'' IEEE Global Communications Conference (GLOBECOM2024), Cape Town, South Africa, Dec. 2024. (Accepted).

3. W. Shengze, M. Bouazizii, and T. Ohtsuki, "(Invited Paper) Remote Inter-beat Interval Estimation: A Signal Reconstruction Approach with Multi-channel Input and Channel-Wise Attention Mechanism," IEEE International Conference on E-health Networking, Application & Services (Healthcom 2024), Nara, Japan, Nov. 2024. (Accepted).

4. R. Ogasawara, M. Bouazizi, and T. Ohtsuki, "Camera-based Stress Detection using Face-related and Emotion-related Features," IEEE International Conference on E-health Networking, Application & Services (Healthcom 2024), Nara, Japan, Nov. 2024. (Accepted).

5. M. Mutsukawa, X. Shi, and T. Ohtsuki, "Chirp Correction and Phase Accumulation-Linear Interpolation-assisted ICEEMDAN-based Heart Rate Estimation from MIMO FMCW Radar," IEEE International Conference on E-health Networking, Application & Services (Healthcom 2024), Nara, Japan, Nov. 2024. (Accepted).

6. M. Bouazizi and T. Ohtsuki, "Multi-Dimensional Representation for Semantic Communication: A New Horizon for Customized Visualization of Shared Knowledge," IEEE Vehicular Technology Conference (VTC2024-Fall), Workshop 6G-Empowered Ambient Intelligence: Advances, Challenges, and Opportunities (6G-EmAI), Washington, D.C., USA, Oct. 2024.

7. Y. Yin, M. Bouazizi, S. Yang, and T. Ohtsuki, "Enhanced User Clustering and Pairing Scheme for NOMA-Aided UAV Networks," IEEE Vehicular Technology Conference (VTC2024-Fall), Workshop 6G-Empowered Ambient Intelligence: Advances, Challenges, and Opportunities (6G-EmAI), Washington, D.C., USA, Oct. 2024.

8. Y. Yin and T. Ohtsuki, "Multi-UAV-Assisted Emergency Caching Networks: UAV Location and NOMA Power Optimization," IEEE Vehicular Technology Conference (VTC2024-Fall), Washington, D.C., USA, Oct. 2024.

9. L. Zhaojie, S. Yang, Y. Yin, M. Bouazizi,  and T. Ohtsuki, "Beamforming Design using UE Positions and 3D Terrain-Building in HAPS System," IEEE Vehicular Technology Conference (VTC2024-Fall), Washington, D.C., USA, Oct. 2024.

10. Y. Saito, M. Bouazizi, and T. Ohtsuki, "Low Complexity CSI Feedback Method Using Reformer," IEEE Vehicular Technology Conference (VTC2024-Fall), Washington, D.C., USA, Oct. 2024.

11. Y. Cao, X. Wu, J. He, and T. Ohtsuki, "Coverage and Rate Performance for Distributed Multi-RIS-Assisted mmWave Communications," IEEE Vehicular Technology Conference (VTC2024-Fall), Washington, D.C., USA, Oct. 2024.

12. R. Wang, Y. Cao, T. Ohtsuki, and J. He, "Cramer-Rao Lower Bound and Fairness Optimization in STAR-RIS Assisted ISAC Systems," IEEE Vehicular Technology Conference (VTC2024-Fall), Washington, D.C., USA, Oct. 2024.

13. L. Wang, C. Zhao, T. Wang, B. Sun, Y. Qi, B. Qi, and T. Ohtsuki, "Ship Classification in SAR Images based on Full-Attention ViT and Image Reconstruction," International Conference on Internet of Things, Communication and Intelligent Technology (IoTCIT), Kunming, China, June, July 2024.

14. Z. Xing, M. Bouazizi, and T. Ohtsuki, "Deep Learning-Based Open-Set Person Identification Using Radar Extracted Cardiac Signals," 2024 46th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), Orland, USA, July 2024.

15. X. Shi, K. Yamamoto, T. Ohtsuki, Y. Matsui, and K. Owada, "Non-invasive Fetal ECG Signal Quality Assessment based on Unsupervised Learning Approach," 2022 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), Glasgow, Scotland, United Kingdom, 2022, pp. 1296-129

16. S. Ishizaka, K. Yamamoto and T. Ohtsuki, "Non-contact Blood Pressure Estimation Method Based on Blood Pressure Category Classification," 2022 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), Glasgow, Scotland, United Kingdom, 2022, pp. 2676-2679

17. R. Yoshizawa, K. Yamamoto and T. Ohtsuki, ``Arterial Blood Pressure Estimation Method from Electrocardiogram Signals using U-Net," 2022 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), Glasgow, Scotland, United Kingdom, 2022, pp. 2689-2692

18. M. Mondher, S. Yang, and T. Ohtsuki, ``A Low-Complexity Clustering-Aided DQN Method for Dynamic Antenna Control in HAPS," IEEE Vehicular Technology Conference (VTC2024-Spring), Singapore, June 2024.

19. S. Sugiyama, K. Makizoe, M. Arai, M. Hasegawa, T. Ohtsuki, and A. Li, ``Fully Autonomous Distributed Transmission Parameter Selection Method for Mobile IoT Applications Using Deep Reinforcement Learning," IEEE Vehicular Technology Conference (VTC2024-Spring), Singapore, June 2024.

20. Y. Zhang, S. Wang, M. Hua, Y. Zhang, T. Ohtsuki, H. Sari, and G. Gui, ``Enhanced Resource Allocation in Vehicular Networks via Multi-Agent Reinforcement Learning," IEEE Vehicular Technology Conference (VTC2024-Spring), Singapore, June 2024.

21. X. Fue, H. Zhao, T. Ohtsuki, O. A. Dobre, C. Yuen, H. Sari, and G. Gui, ``Hypersphere Projection-Guided Radio Frequency Fingerprinting Authentication in the Open World," IEEE Vehicular Technology Conference (VTC2024-Spring), Singapore, June 2024.

22. X. Huang, Y. Cao, and T. Ohtsuki, "DEEP SUB-IMAGE SAMPLING BASED DEFENSE AGAINST SPATIAL-DOMAIN ADVERSARIAL STEGANOGRAPHY," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2024), Seoul, Korea, April 2024.

23. Y. Cao, S. Maghsudi, and T. Ohtsuki, "Age-Based Federated Learning Approach to In-Network Caching: An Online Scheduling Policy," IEEE International Conference on Communications (ICC2024), Denver, CO, June 2024.

24. X. Meng, M. Mondher, and T. Ohtsuki, "3D-LiDAR-based Fall Detection by Dynamic Non-Linear Mapping with LSTM," IEEE International Conference on Communications (ICC2024), Denver, CO, June 2024.

25. A.A. Masud, X. Shi, M. Mondher, and T. Ohtsuki, "mmGAT: Pose Estimation by Graph Attention with Mutual Features from mmWave Radar Point Cloud," IEEE International Conference on Communications (ICC2024), Denver, CO, June 2024.

26. K. Feghoul, M. Mondher, R. Feghou, and T. Ohtsuki, "ECGDiff: Conditional Diffusion Model for ECG Reconstruction from Doppler Signals," IEEE International Conference on Communications (ICC2024), Denver, CO, June 2024.

27. J. Tachibana, M. Bouazizi, and T. Ohtsuki, "Massive MIMO Belief Propagation Detection Using DIP with DNN-Trained Scaling Factor," IEEE Wireless Communications and Networking Conference (WCNC2024), Dubai, UAE, Apr. 2024.

28. M. Inoue, T. Ohtsuki, and M. Bouazizi, "DTL-Based CSI Feedback Combined With Continual Learning in FDD Massive MIMO Systems," IEEE International Conference on Computing, Networking and Communications (ICNC2024), Big Island, Hawaii, Feb. 2024

29. M. Inoue and T. Ohtsuki, "Source CSI Dataset for Multi-task CSI Feedback," IEEE Consumer Communications and Networking Conference (CCNC2024), Las Vegas, NV, Jan. 2024.

30. D. Yu, M. Bouazizi, and T. Ohtsuki, "Improving Heart Rate Range Classification Using Doppler Radar with GAN-based Data Augmentation,'' IEEE Global Communications Conference (GLOBECOM2023), Kuala Lumpur, Malaysia, Dec. 2023. (Accepted).

31. M. Bouazizi, K. Feghoul, A.L. Mora, and T. Ohtsuki, "A Novel Approach for Activity, Fall and Gait Detection Using Multiple 2D LiDARs,'' IEEE Global Communications Conference (GLOBECOM2023), Kuala Lumpur, Malaysia, Dec. 2023. (Accepted).

32. M. Bouazizi, D. Yu, K. Feghoul, and T. Ohtsuki, "A GAN-Based Approach for ECG Reconstruction from Doppler Sensor Signals,'' IEEE Global Communications Conference (GLOBECOM2023), Kuala Lumpur, Malaysia, Dec. 2023. (Accepted).

33. N. Ji, M. Bouazizi, and T. Ohtsuki, "Depression Detection via User Behavior and Tweets,'' IEEE Global Communications Conference (GLOBECOM2023), Kuala Lumpur, Malaysia, Dec. 2023. (Accepted).

34. T. Mori and T. Ohtsuki, "HAPS Trajectory Optimization Based on Throughput Heat Map,'' IEEE Global Communications Conference (GLOBECOM2023), Kuala Lumpur, Malaysia, Dec. 2023. (Accepted).

35. W. Dai, S. Yang, M. Bouazizi, and T. Ohtsuki, "K-Means Clustering-Aided Dynamic Multi-Cell Optimization Algorithm for HAPS,'' IEEE Global Communications Conference (GLOBECOM2023), Kuala Lumpur, Malaysia, Dec. 2023. (Accepted).

36. L. Ma, L. Wang, C. Zhao, Jiahui E, and T. Ohtsuki, "MULTILAYER ATTENTION MECHANISM FOR CHANGE DETECTION IN SAR IMAGE SPATIAL-FREQUENCY DOMAIN," 2023 IEEE International Conference on Image Processing (ICIP 2023), Kuala Lumpur, Oct. 2023.

37. T. Zhao, L. Wang, C. Zhao, T. Liu, and T. Ohtsuki, "HETEROGENEOUS IMAGE CHANGE DETECTION BASED ON DEEP IMAGE TRANSLATION AND FEATURE REFINEMENT-AGGREGATION," 2023 IEEE International Conference on Image Processing (ICIP 2023), Kuala Lumpur, Oct. 2023.

38. Y. Shibata, W. Takabatake, K. Hoshino, A. Nagate, and T. Ohtsuki, "HAPS Cell Design Method for Coexistence on Terrestrial Mobile Networks," IEEE Vehicular Technology Conference (VTC2023-Spring), Firenze June 2023.

39. Q. Hao, H. Zhao, H. Huang, G. Gui, T. Ohtsuki, and F.i Adachi, "Deep Reinforcement Learning Aided Online Trajectory Optimization of Cellular-Connected UAVs with Offline Map Reconstruction," IEEE Vehicular Technology Conference (VTC2023-Spring), Firenze June 2023.

40. Y. Huang, X. Zhang, Y. Wang, D. Jiao, G. Gui, and T. Ohtsuki, "NASEI: Neural Architecture Search-Based Specific Emitter Identification Method," IEEE Vehicular Technology Conference (VTC2023-Spring), Firenze June 2023.R. Yoshizawa, K. Yamamoto, and T. Ohtsuki, ”Arterial Blood Pressure Waveform Estimation from Photoplethysmogram under Inter-subject Paradigm using Subject-distinguishable Dataset by U-Net and Domain Adversarial Training," IEEE International Conference on Communications (ICC2023), Rome, May, June 2023.

41. S. Wang, T. Ohtsuki, and M. Bouazizi, ”Non-contact Blood Pressure Estimation using Accurate Cardiac Movements extracted by Hidden semi-Markov Model," IEEE International Conference on Communications (ICC2023), Rome, May, June 2023.

42. S. Yang, M. Bouaizi, and T. Ohtsuki, ”Dynamic Antenna Control for HAPS Using Mean Field Reinforcement Learning in Multi-Cell Configuration," IEEE International Conference on Communications (ICC2023), Rome, May, June 2023.

43. Z. Li, T. Ohtsuki, and G. Gui, "Communication Efficient Heterogeneous Federated Learning based on Model Similarity," IEEE Wireless Communications and Networking Conference (WCNC2023), Glasgow, Mar. 2023.

44. M. Inoue, T. Ohtsuki, K. Yamamoto, and G. Gui, "Evaluation of Source Data Selection for DTL Based CSI Feedback Method in FDD Massive MIMO Systems," IEEE Consumer Communications and Networking Conference (CCNC2023), Las Vegas, NV, Jan. 2023 

45. X. Shi, K. Yamamoto, T. Ohtsuki, Y. Matsui, and K. Owada, "Unsupervised Representation Learning-based Doppler Ultrasound Signal Quality Assessment,'' IEEE Global Communications Conference (GLOBECOM2022), Rio de Janeiro, Brazil, Dec. 2022.

46.  Y. Chen, M. Bouazizi, and T. Ohtsuki, "Social Robot Detection Using RoBERTa Classifier and Random Forest Regressor with Similarity Analysis,'' IEEE Global Communications Conference (GLOBECOM2022), Rio de Janeiro, Brazil, Dec. 2022.

47. S. Nakatani, K. Yamamoto, and T. Ohtsuki, "Fetal Arrhythmia Detection based on Deep Learning using Fetal ECG Signals,'' IEEE Global Communications Conference (GLOBECOM2022), Rio de Janeiro, Brazil, Dec. 2022.

48. Z. Xing, M. Bouazizi, and T. Ohtsuki, "Deep Learning-based Person Identification using Vital Signs Extracted from Radar Signal," 2022 International Conference on Emerging Technologies for Communications (ICETC2022), Tokyo, Japan, Nov., Dec. 2022.

49. J. Liu, M. Bouazizi, and T. Ohtsuki, "LOS/NLOS Classification for Downlink CDL Channel Using Supervised Learning," 2022 International Conference on Emerging Technologies for Communications (ICETC2022), Tokyo, Japan, Nov., Dec. 2022.

50. Y. Yamada and T. Ohtsuki, "Autoencoder-based Pilot Pattern Design for CDL Channels,'' The 27th Asia-Pacific Conference on Communications (APCC2022), Jeju Island, Korea, Oct. 2022.

51. S. Yang, M. Boouazizi, T. Ohtsuki, Y. Shibata, W. Takabatake, K. Hoshino, and A. Nagate,  "K-Means Clustering-Based Dynamic Antenna Control for HAPS in Multi-Cell Configuration," IEEE Vehicular Technology Conference (VTC2022-Spring), Helsinki, June 2022.

52. J. Gao, M. Bouazizi, T. Ohtsuki, and G. Gui, "Adaptive DNN-based CSI Feedback with Quantization for FDD Massive MIMO Systems," IEEE Vehicular Technology Conference (VTC2022-Fall), London/Beijing, Sep. 2022.

53. H. Liu, C. Hao, Y. Peng, Y. Wang, T. Ohtsuki, and G. Gui, "An Effective Radio Frequency Signal Classification Method Based on Multi-Task Learning Mechanism," IEEE Vehicular Technology Conference (VTC2022-Fall), London/Beijing, Sep. 2022.

54. S. Xu, Z. He, W. Shi, Y. Wang, T. Ohtsuki, and G. Gui, "Cross-Person Activity Recognition Method Using Snapshot Ensemble Learning," IEEE Vehicular Technology Conference (VTC2022-Fall), London/Beijing, Sep. 2022.

55. X. Zhang, Y. Wang, Y. Lin, G. Gui, T. Ohtsuki, and H. Sari, "Data Augmentation Aided Few-Shot Learning for Specific Emitter Identification," IEEE Vehicular Technology Conference (VTC2022-Fall), London/Beijing, Sep. 2022.

56. Y. Yamada and T. Ohtsuki, "Autoencoder-based Pilot Pattern Design for CDL Channels,'' The 27th Asia-Pacific Conference on Communications (APCC2022), Jeju Island, Korea, Oct. 2022.

57. C. Sun, X. Xiong, W. Ni, T. Ohtsuki, and X. Wang, "Max-Min Fair 3D Trajectory Planning for Solar-Powered UAV-Assisted Data Collection,'' IEEE International Conference on Communications in China (ICCC2022), Foshan City, China, Aug. 2022.

58. Y. Shibata, W. Takabatake, K. Hoshino, A. Nagate, and T.  Ohtsuki, "Co-Evolutionary Dynamic Cell Optimization Algorithm for HAPS Mobile Communications," IEEE Vehicular Technology Conference (VTC2022-Spring), Helsinki, June 2022.

59. Y. Li, C. Chen, G. Gui, T.  Ohtsuki, and H. Sari, ``Joint Weighted and Truncated Nuclear Norm Minimization for Matrix Completion-Assisted mmWave Massive MIMO Channel Estimation," IEEE Vehicular Technology Conference (VTC2022-Spring), Helsinki, June 2022.

60. K. Wada, S. Yang, M. Boouazizi, T. Ohtsuki, Y. Shibata, W. Takabatake, K. Hoshino, and A. Nagate, "Dynamic Antenna Control for HAPS Using Fuzzy Q-Learning in Multi-Cell Configuration," IEEE International Conference on Communications (ICC2022), Helsinki, June 2022.

61. M. Boouazizi, K. Yamamoto, and T. Ohtsuki, "Heartbeat Detection Using 3D Lidar and MIMO Doppler Radar," IEEE International Conference on Communications (ICC2022), Helsinki, June 2022.

62. R. Zhao, L. Yang, Y. Yang, Z. Xue, G. Gui, and T. Ohtsuki, "A Semi-Supervised Federated Learning Scheme via Knowledge Distillation for Intrusion Detection," IEEE International Conference on Communications (ICC2022), Helsinki, June 2022.

63. M. Bouazizi, C. Zheng, and T. Ohtsuki, ``Dementia Detection Using Language Models and Transfer Learning,'' The 5th International Conference on Software Engineering and Information Management (ICSIM2022), Yokohama, Japan, Jan. 2022.

64. M. Bouazizi, C. Ye, and T. Ohtsuki, "Activity Detection using 2D LIDAR for Healthcare and Monitoring,'' IEEE Global Communications Conference (GLOBECOM2021), Madrid, Spain, Dec. 2021.

65. T. Kitagawa, K. Yamamoto, and T. Ohtsuki, "Non-contact Heartbeat Detection Based on Beam Diversity Using Multibeam Doppler Sensor,'' IEEE Global Communications Conference (GLOBECOM2021), Madrid, Spain, Dec. 2021.

66. K. Yamamoto, K. Endo, and T. Ohtsuki, "Remote Sensing of Heartbeat based on Space Diversity Using MIMO FMCW Radar,'' IEEE Global Communications Conference (GLOBECOM2021), Madrid, Spain, Dec. 2021.

67. K. Endo, K. Yamamoto, and T. Ohtsuki, ``A Study on Denoising Method Using Deep Image Prior for Radar Signal Processing," 2021 International Conference on Emerging Technologies for Communications (ICETC2021), Tokyo, Japan, Dec. 2021.

68. R. Yoshizawa, K. Yamamoto, and T. Ohtsuki, ``Correlation between Beat-to-Beat Blood Pressure and RRI estimated from Noncontact CW Doppler Radar," 2021 International Conference on Emerging Technologies for Communications (ICETC2021), Tokyo, Japan, Dec. 2021.

69. C. Zheng, M. Bouazizi, and T. Ohtsuki, ``Dementia Detection Using Two Perplexity Methods with Part-of-Speech Tags," 2021 International Conference on Emerging Technologies for Communications (ICETC2021), Tokyo, Japan, Dec. 2021.

70. M. Bouazizi, S. Yang, Y. Cao, and T. Ohtsuki, "A Novel Approach for Inter-User Distance Estimation in 5G mmWave Networks Using Deep Learning,'' The 26th Asia-Pacific Conference on Communications (APCC2021), Virtual, Oct. 2021.

71. N. Niida, L. Wang, and T. Ohtsuki, K. Owada, N.Honma, and H. Hayashi, "Fetal Heart Rate Detection Using First Derivative of ECG Waveform and Multiple Weighting Functions," 2021 43rd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), Oct.-Nov. 2021.

72. A. A. Qureshi, L. Wang, and T. Ohtsuki, K. Owada, N.Honma, and H. Hayashi, "An Autoencoder-Based Heart Rate Detector for Noninvasive Recordings," 2021 43rd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), Oct.-Nov. 2021.

73. Y. Wang, J. Sun, J. Wang, J. Yang, B. Adebisi, T.  Ohtsuki, and H. Gacanin, "Multi-Rate Compression for Downlink CSI Based on Transfer Learning in FDD Massive MIMO Systems," IEEE Vehicular Technology Conference (VTC2021-Fall), Virtual, Sep. 2021.

74. Z. He, H. Huan, J. Yang, G. Gui, T.  Ohtsuki, B. Adebisi, and H. Gacanin, "Multi-Rate Compression for Downlink CSI Based on Transfer Learning in FDD Massive MIMO Systems," IEEE Vehicular Technology Conference (VTC2021-Fall), Virtual, Sep. 2021.

75. X. Lu, M. Tao, X. Fu, T.  Ohtsuki, H. Sari, and F. Adachi, "Lightweight Network Design Based on ResNet Structure for Modulation Recognition," IEEE Vehicular Technology Conference (VTC2021-Fall), Virtual, Sep. 2021.

76. H. Dai, Y. Yin, H. Huang, J. Yang, T.  Ohtsuki, and H. Sari, "Weighted-Beam Superposition for mmWave Massive MIMO-NOMA Systems," IEEE Vehicular Technology Conference (VTC2021-Fall), Virtual, Sep. 2021.

77. M. Zhang, W. Luo, Y. Wang, J. Sun, J. Yang, and T.  Ohtsuki, "An Effective Radar Signal Recognition Method Using Neural Architecture Search," IEEE Vehicular Technology Conference (VTC2021-Fall), Virtual, Sep. 2021.

78. Y. Zhou, Y. Wang, P. Liu, J. Yang, T.  Ohtsuki, and H. Sari, "Decentralized Learning-based Scenario Identification Method for Intelligent Vehicular Communications," IEEE Vehicular Technology Conference (VTC2021-Fall), Virtual, Sep. 2021.

79. Z. Wang, Z. Li, Y. Wang, W. Li, J. Yang, and T.  Ohtsuki, "HSRRS Classification Method Based on Deep Transfer Learning And Multi-Feature Fusion," IEEE Vehicular Technology Conference (VTC2021-Fall), Virtual, Sep. 2021.

80. K. Yamamoto and T. Ohtsuki,  ``Noncontact Heartbeat Detection by Viterbi Algorithm with Fusion of Beat-Beat Interval and Deep Learning-driven Branch Metrics,” IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP2021), Toronto, Canada, June 2021.

81. S. Ishizaka, K. Yamamoto, and  ``Non-contact Blood Pressure Measurement using Doppler Radar based on Waveform Analysis by LSTM,” IEEE International Conference on Communications (ICC2021), Montreal, Canada, June 2021.

82. Y. Cao, S. Maghsudi, and T. Ohtsuki, “Mobility-Aware Routing and Caching: A Federated Learning Assisted Approach,” IEEE International Conference on Communications (ICC2021), Montreal, Canada, June 2021.

83. L. Wang and T. Ohtsuki, ``From Multiset Events to Signal Restoration via Tensor Decomposition Based Separation Learning,‘’ IEEE International Conference on Communications (ICC2021), Montreal, Canada, June 2021. 

84. Laghtweight Network and Model Aggregation for Automatic Modulation Classification,” IEEE Wireless Communications and Networking Conference (WCNC2021), Nanjing, China, Apr. 2021.

85. R. Zhao, Z. Li, Z. Xue, T. Ohtsuki, and G. Gui, ``A Novel Approach based on Lightweight Deep Neural Network for Network Intrusion Detection,” IEEE Wireless Communications and Networking Conference (WCNC2021), Nanjing, China, Apr. 2021.

86. Y. Wang, Y. Zhang, J. Sun, G. Gui, T. Ohtsuki, and F. Adachi, ``A Novel Compression CSI Feedback based on Deep Learning for FDD Massive MIMO Systems,” IEEE Wireless Communications and Networking Conference (WCNC2021), Nanjing, China, Apr. 2021.

87. X. Wei, W. Luo, X. Zhang, J. Yang, G. Gui, and T. Ohtsuki, ``Differentiable Architecture Search-Based Automatic Modulation Classification,” IEEE Wireless Communications and Networking Conference (WCNC2021), Nanjing, China, Apr. 2021.

88. M. Bouazizi, N. Niida, and T. Ohtsuki, “All-in-One Hate Speech Detectors May not be what You Want,” The 4th International Conference on Software Engineering and Information Management (ICSIM2021), Yokohama, Japan, Jan. 2021.

89. A. Yamada and T. Ohtsuki, ``Convergence Properties of Polar Code Construction using Genetic Algorithm with Initialization based on Bhattacharrya Bounds,” 2020 International Conference on Emerging Technologies for Communications (ICETC2020), Tokyo, Japan, Dec. 2020.

90. A. A. Qureshi, L. Wang, and T. Ohtsuki, K. Owada, N.Honma, and H. Hayashi, ``Reconstructing Maternal ECG from Abdominal ECG Using Autoencoder,” 2020 International Conference on Emerging Technologies for Communications (ICETC2020), Tokyo, Japan, Dec. 2020.

91. L. Wang and T. Ohtsuki, ``Tensor Decomposition Based Method for Multiset Blind Source Separation,” 2020 International Conference on Emerging Technologies for Communications (ICETC2020), Tokyo, Japan, Dec. 2020.

92. M.Suzuki and T. Ohtsuki, `Evaluation of Concentration of Carbon Dioxide and Stress When Wearing a Mask,” 2020 International Conference on Emerging Technologies for Communications (ICETC2020), Tokyo, Japan, Dec. 2020. 

93. H. Hirose, T. Ohtsuki, and G. Gui, ``Deep Learning Aided Channel Estimation for Massive MIMO with Pilot Contamination,'' IEEE Global Communications Conference (GLOBECOM2020), Taipei, Taiwan, Dec. 2020.

94. T. Nakamura, M. Mondher, K. Yamamoto, and T. Ohtsuki, ``Wi-Fi-CSI-based Fall Detection by Spectrogram Analysis with CNN,'' IEEE Global Communications Conference (GLOBECOM2020), Taipei, Taiwan, Dec. 2020.

95. L. Wang, T. Ohtsuki, K. Ohwada, N. Honma, H. Hayashi, ``Joint Multiple Subspace-Based BSS Method for Fetal Heart Rate Extraction from Non-Invasive Recordings,''  42st International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC2020), Montreal, Canada, July 2020 . 

96.  X. Lin, L. Wang, T. Ohtsuki, ``Online Recursive ICA Algorithm Used for Motor Imagery EEG Signal'',  42st International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC2020), Montreal, Canada, July 2020 . 

97. C. Ye, G. Gui, and T. Ohtsuki, ``Deep Clustering with LSTM for Vital Signs Separation in Contact-free Heart Rate Estimation,'' IEEE International Conference on Communications (ICC2020), Dublin, Ireland, June 2020.

98. A. Yamada and T. Ohtsuki, ``Discrete Polar Decoder using Information Bottleneck Method,'' IEEE International Conference on Communications (ICC2020), Dublin, Ireland, June 2020.

99. Y. Cao and T. Ohtsuki, ``Multi-Configuration Selection Mechanisms and Analog Precoding for Signature Spatial Modulation,'' IEEE International Conference on Communications (ICC2020), Dublin, Ireland, June 2020.

100. T. Nakamura, K. Toyoda and T. Ohtsuki, ``On-Road Object Identification with Time Series Automotive Millimeter-wave Radar Information," IEEE Vehicular Technology Conference (VTC2020-Spring), Antwerp, Belgium, May 2020.

101. K. Wada and T. Ohtsuki, ``Interference Control of LTE-LAA using Q-learning with HARQ," IEEE Vehicular Technology Conference (VTC2020-Spring), Antwerp, Belgium, May 2020.

102. J. Tachibana and T. Ohtsuki, ``Damping Factor Learning of BP Detection with Node Selection in Massive MIMO using Neural Network," IEEE Vehicular Technology Conference (VTC2020-Spring), Antwerp, Belgium, May 2020.

103. Y. Kumar and T. Ohtsuki, ``User Association to Overcome Human Blockage at mmWave Cellular Networks," IEEE Vehicular Technology Conference (VTC2020-Spring), Antwerp, Belgium, May 2020.

104. K. Tsuchiya, K. Mochizuki, T. Ohtsuki, K. Yamamoto, ``Heartbeat Detection Technology for Monitoring Driver's Physical Condition," SAE World Congress Experience, Detroit, USA, Apr. 2020. (to appear)

105. W. Takabatake, K. Yamamoto, K. Toyoda, T. Ohtsuki, Y. Shibata, and A. Nagate, ``FMCW Radar-based Anomaly Detection in Toilet by Supervised Machine Learning Classifier," IEEE Global Communications Conference (GLOBECOM2019), Waikoloa, HI, USA, Dec. 2019.

106. K. Yamamoto, K. Toyoda, and T. Ohtsuki, ``CNN-based Respiration Rate Estimation in Indoor Environments via MIMO FMCW Radar," IEEE Global Communications Conference (GLOBECOM2019), Waikoloa, HI, USA, Dec. 2019.

107. Y. Cao and T. Ohtsuki, ``Dual-Ascent Inspired Iterative Transmit Precoding Approaches for Multiple Access Spatial Modulation," IEEE Global Communications Conference (GLOBECOM2019), Waikoloa, HI, USA, Dec. 2019.

108. M. Kuriyama and T. Ohtsuki, ``Low Complexity and High Accuracy Channel Interpolation with Dividing URA into Small URAs for 3D Massive MIMO," IEEE Vehicular Technology Conference (VTC2019-Fall), Honolulu, Hawaii, USA, Sep. 2019.

109. K. Yamamoto, K. Toyoda, and T. Ohtsuki, ``MUSIC-based Non-contact Heart Rate Estimation with Adaptive Window Size Setting,'' 41st International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC2019), Berlin, Germany, July 2019. 

110. R. Hiromatsu, K. Yamamoto, K. Toyoda, and T. Ohtsuki, ``Novel CA-CFAR Approach for Improvement of Doppler Sensor-based Heart Rate Variability Estimation,'' 41st International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC2019), Berlin, Germany, July 2019. 

111. A. Takahashi, F. Sasamori, S. Handa, O. Takyu, T. Fujii, and To. Ohtsuki, ``Overloaded Wireless MIMO Switching for Secure Wireless Communication Exchanging to Untrusted Relay," 2019 Eleventh International Conference on Ubiquitous and Future Networks (ICUFN), Sep. 2019.

112. L. Wang and T. Ohtsuki, ``Underdetermined Blind Separation Using Multi-Subspace Representation in Time-Frequency Domain,'' IEEE International Conference on Communications (ICC2019), Shanghai, China, May 2019.

113. C. Ye, K. Toyoda, and T. Ohtsuki, ``Non-negative Matrix Factorization-Based Blind Source Separation for Non-contact Heartbeat Detection,'' IEEE International Conference on Communications (ICC2019), Shanghai, China, May 2019.

114. K. Yamamoto, K. Toyoda, and T. Ohtsuki, ``Spectrogram-based Simultaneous Heartbeat and Blink Detection Using Doppler Sensor,'' IEEE International Conference on Communications (ICC2019), Shanghai, China, May 2019.

115. Y. Cao and T. Ohtsuki, ``Precoding Aided Generalized Spatial Modulation with K Transmit Antenna Groups ,'' IEEE International Conference on Communications (ICC2019), Shanghai, China, May 2019.

116. L. Wang and T. Ohtsuki, ``Polynomial Networks Representation of Nonlinear Mixtures with Application in Underdetermined Blind Source Separation,'' IEEE the 44th International Conference on Acoustics, Speech, and Signal Processing (ICASSP2019), Brighton, UK, May 2019.

117. K. Kanemura, K. Toyoda, and T. Ohtsuki, ``Identification of Darknet Markets’ Bitcoin Addresses by Voting Per-address Classification Results," 2019 IEEE Int. Conf. on Blockchain and Cryptocurrency (ICBC), Seoul, South Korea, May 2019.

118. F.H. Panahi, F.H. Panahi, S. Heshmati, and T. Ohtsuki, ``Optimal Sleep & Wakeup Mechanism for Green Internet of Things," 2019 27th Iranian Conference on Electrical Engineering (ICEE), Apr. May 2019.

119. T. Noguchi, O. Takyu, T. Fujii, T. Ohtsuki, F. Sasamori, and S. Handa, ``Performance Evaluation of Information-Sharing Scheme Among Multiple Destinations with Mirroring Null Steering in Single Antenna Networks,'' in Proc. IEEE 2019 International Conference on Information Networking (ICOIN), 5 pages, Jan. 2019

120. L. Wang and T. Ohtsuki, “Signal Restoration Based on Temporal Structure and Multi-Layer Architecture,” IEEE Global Communications Conference (GLOBECOM2018), Abu Dhabi, UAE, Dec. 2018.

121. M. Ozawa, F. H. Panahi and T. Ohtsuki, "paper 1," IEEE Global Communications Conference (GLOBECOM2018), Abu Dhabi, UAE, Dec. 2018.

122. A. Li, F. H. Panahi, T. Ohtsuki, and G. Han, “Learning-Based Optimal Channel Selection in the Presence of Jammer for Cognitive Radio Networks,” IEEE Global Communications Conference (GLOBECOM2018), Abu Dhabi, UAE, Dec. 2018.

123. A. Li, G. Han, and T. Ohtsuki, “Enhanced Channel Hopping Algorithm for Heterogeneous Cognitive Radio Networks,” IEEE Global Communications Conference (GLOBECOM2018),  Abu Dhabi, UAE, Dec. 2018.

124. K. Yamamoto, K. Toyoda, and T. Ohtsuki, “Non-contact Heartbeat Detection by MUSIC with Discrete Cosine Transform-based Parameter Adjustment,” IEEE Global Communications Conference (GLOBECOM2018),  Abu Dhabi, UAE, Dec. 2018. 

125. H. Kamoi, K. Toyoda, and T. Ohtsuki, “Fall Detection Using UHF Passive RFID Based on the Neighborhood Preservation Principle,” IEEE Global Communications Conference (GLOBECOM2018),  Abu Dhabi, UAE, Dec. 2018.

126. K. Toyoda, T. Ohtsuki, and P. T. Mathiopoulos, “Time Series Analysis for Bitcoin Transactions: The Case of Pirate@40's HYIP Scheme,'' in Proc of. IEEE International Conference on Data Mining Workshops (ICDMW), Singapore, Nov. 2018. 

127. L. Wang and  T. Ohtsuki, “A Convergence and Asymptotic Analysis of Nonlinear Separation Model,'' Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC2018), Honolulu, Hawaii, USA, Nov. 2018.

128. M. Kudo and T. Ohtsuki, “Effects of Channel Covariance Estimation Error on Joint Maximum A Posteriori Estimation of Channel and Interference Power for OFDM Transmission,” IEEE Asia Pacific Wireless Communications Symposium (APWCS2018), Hsinchu, Taiwan, Aug. 2018.

129. C. Ye, K. Toyoda, and T. Ohtsuki, “Improved Sparse Adaptive Algorithms for Accurate Non-contact Heartbeat Detection Using Time-Window-Variation Technique,'' 40th International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC2018), Honolulu, USA, July 2018. 

130. H. Echigo and T.  Ohtsuki, “Graph Coloring-based Pilot Reuse with AOA and Distance in D2D Underlay Massive MIMO," IEEE Vehicular Technology Conference (VTC2018-Spring), Porto, Portugal, June 2018.

131. Y. Qi and T.  Ohtsuki, “QoE-aware Video Streaming Transmission Optimization Method for Playout Threshold Adjustment in LTE," IEEE Vehicular Technology Conference (VTC2018-Spring), Porto, Portugal, June 2018.

132. C. Ye, K. Toyoda, and T. Ohtsuki, “Robust Heartbeat Detection with Doppler Radar Based on Stochastic Gradient Approach,” IEEE International Conference on Communications (ICC2018), Kansas, USA, May 2018.

133. K. Yamamoto, K. Toyoda, and T. Ohtsuki, “Doppler Sensor-Based Blink Duration Estimation by Spectrogram Analysis,” IEEE International Conference on Communications (ICC2018), Kansas, USA, May 2018.

134. Y. Agata, K. Toyoda, and T. Ohtsuki, “Doppler Analysis Based Fall Detection Using Array Antenna,” IEEE International Conference on Communications (ICC2018), Kansas City, America, May 2018.

135. S. Iwata, T.  Ohtsuki, and P.Y. Kam, ``Secure Outage Probability Over $¥kappa-¥mu$ Fading Channels," IEEE International Conference on Communications (ICC'2018), Kansas City, Missouri, May 2018

136. T. Noguchi, O. Takyu, T. Fujii, T. Ohtsuki, F. Sasamori, and S. Handa, “Secure Information Sharing with Mirroring Null Steering through Untrusted Relay with Two Antennas,” 2018 IEEE Radio and Wireless Week (RWW 2018), Anaheim, CA, Jan. 2018

137. Y. Shirasaki, O. Takyu, T. Fujii, T. Ohtsuki, F. Sasamori, and S. Handa, “Consideration of Security for PLNC with Untrusted Relay in Game Theoretic Perspective,” 2018 IEEE Radio and Wireless Week (RWW 2018), Anaheim, CA, Jan. 2018

138. Y. Kakizaki, T. Ohtsuki, P.Y. Kam, K. Suzuki, H. Sasaki, and H. So, “Joint SDA-MAP Estimation of Channel and Interference Power in Superposed OFDM Transmission,” IEEE Global Communications Conference (GLOBECOM2017), Singapore, Dec. 2017

139. H. Echigo, T. Ohtsuki, W. Jiang, and Y. Takatori, “Fair Pilot Assignment based on AOA and Pathloss with Location Information in Massive MIMO,” IEEE Global Communications Conference (GLOBECOM2017), Singapore, Dec. 2017

140. A. Li, G. Han, and T. Ohtsuki, “Energy-Efficient Channel Hopping Protocol for Cognitive Radio Networks,” IEEE Global Communications Conference (GLOBECOM2017), Singapore, Dec. 2017

141. K. Toyoda, T. Ohtsuki, and P.T. Mathiopoulos, “Identi cation of High Yielding Investment Programs in Bitcoin via Transactions Pattern Analysis,” IEEE Global Communications Conference (GLOBECOM2017), Singapore, Dec. 2017

142. F.H. Panahi, F.H. Panahi, G. Hattab, T. Ohtsuki, and D. Cabric, “Green Heterogeneous Networks via an Intelligent Power Control Strategy and D2D Communications,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2017), Montreal, Canada, Oct. 2017.

143. K. Yamamoto, K. Toyoda, and T. Ohtsuki, “Driver’s Blink Detection Using Doppler Sensor,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2017), Montreal, Canada, Oct. 2017.

144. K. Kanemura, K. Toyoda, and T. Ohtsuki, “Design of Privacy-preserving Mobile Bitcoin Client Based on γ-Deniability Enabled Bloom Filter,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2017), Montreal, Canada, Oct. 2017.

145. D. Chaima and T. Ohtsuki, \Antenna Parameters Optimization in Self-Organizing Networks: Multi-armed Bandits with Pareto Search,” IEEE Vehicular Technology Conference (VTC2017-Fall), Toronto, Canada, Sep. 2017.

146. S. Iwata, T. Ohtsuki, and P.Y. Kami, “Performance Analysis of Physical Layer Security Over Rician/Nakagami-m Fading Channels ,” IEEE Vehicular Technology Conference (VTC2017-Spring), Sydney, Australia, June 2017

147. Y. Ai and T. Ohtsuki, “Performance Analysis of PLC over Fading Channels with Colored Nakagami-m Background Noise,” IEEE Vehicular Technology Conference (VTC2017-Spring), Sydney, Australia, June 2017

148. M. Endo, T. Ohtsuki, T. Fujii, and O. Takyu, “Secure Channel Selection Using Multi-Armed Bandit Algorithm in Cognitive Radio Network,” IEEE Vehicular Technology Conference (VTC2017-Spring), Sydney, Australia, June 2017

149. A. Al-Shaikh, F.H. Panahi, T. Ohtsuki, K. Suzaki, H. Sasaki, H. So, and T. Nakagawa, “Q-Learning Based Superposed Band Detection in Multicarrier Transmission,” IEEE International Conference on Communications (ICC’2017), Paris, France, May 2017

150. S. Iwata, T. Ohtsuki, and P.Y. Kam, “Secure Outage Probability Over κ-μ Fading Channels,” IEEE International Conference on Communications (ICC’2017), Paris, France, May 2017

151. E. Mogi and T. Ohtsuki, “Heartbeat Detection with Doppler Radar Based on Spectrogram,” IEEE International Conference on Communications (ICC’2017), Paris, France, May 2017

152. C. Tamba, H. Hayashi, and T. Ohtsuki, “Improvement of Blink Detection Using a Doppler Sensor Based on CFAR Processing,” IEEE Global Communications Conference (GLOBECOM2016) Washington D.C., USA, Dec 2016

153. F.H. Panahi, T. Ohtsuki, W. Jiang, Y. Takatori, and K. Uehara, “Joint Interference Alignment and Power Allocation under Perfect and Imperfect CSI,” IEEE Global Communications Conference (GLOBECOM2016) Washington D.C., USA, Dec 2016

154. P. Valera, J. Hong, and T. Ohtsuki, “IGMM-Based Approach for Discovering Co-located Mobile Users,” IEEE Global Communications Conference (GLOBECOM2016) Washington D.C., USA, Dec 2016

155. A. Beylerian and T. Ohtsuki, “Coordinated Non-Orthogonal Mulitple Access (CO-NOMA),” IEEE Global Communications Conference (GLOBECOM2016) Washington D.C., USA, Dec 2016

156. M. Bouazizi and T. Ohtsuki, “Sentiment Analysis in Twitter: From Classification to Quantification of Sentiments within Tweets,” IEEE Global Communications Conference (GLOBECOM2016) Washington D.C., USA, Dec 2016

157. C. Tamba, H. Hayashi, and T. Ohtsuki, “Improvement of Blink Detection Using a Doppler Sensor Based on CFAR Processing,” IEEE Global Communications Conference (GLOBECOM2016) Washington D.C., USA, Dec 2016

158. E. Mogi and T. Ohtsuki, `Heartbeat Detection with Doppler Radar Based on Estimation of Average R-R Interval Using Viterbi Algorithm,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2016), Valencia, Spain, Sep. 2016.

159. H. Kamoi and T. Ohtsuki, “Biometric Authentication using Hand Movement Information from Wrist-worn PPG Sensors,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2016), Valencia, Spain, Sep. 2016.

160. R. Nagashima, T. Ohtsuki, W. Jiang, Y. Takatori, and T. Nakagawa, “Channel Prediction for Massive MIMO with Channel Compression based on Principal Component Analysis,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2016), Valencia, Spain, Sep. 2016.

161. T. Hori and T. Ohtsuki, “QoE and Throughput Aware Radio Resource Allocation Algorithm in LTE Network with Users using Different Applications,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2016), Valencia, Spain, Sep. 2016.

162. H. D. Trung, D. V. Tuan, “Free-Space Optical Communications using Gaussian Q-function Bounds in Weak Atmospheric Turbulence,” IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS2016), Tokyo, Aug. 2016

163. Q. Wang, Ti. Song, M.W. Wu, T. Ohtsuki, and P.Y. Kam, “Influence of Pointing Errors on Error Probability of Inter-Satellite Laser Communications,”Optoelectronics and Communications Conference / International Conference on Photonics in Switching (OECC/PS 2016), Niigata, Japan, July 2016.

164. F. H. Panahi, T. Ohtsuki, W. Jiang, Y. Takatori, and K. Uehara, “Interference Alignment and Power Allocation for Multi-User MIMO Interference Channels,” IEEE International Conference on Communications (ICC’2016), Kuala Lumpur, Malaysia, May 2016.

165. M. Bouazizi and T. Ohtsuki, “Sentiment Analysis: from Binary to Multi-Class Classification – A Pattern-Based Approach for Multi-Class Sentiment Analysis in Twitter,” IEEE International Conference on Communications (ICC’2016), Kuala Lumpur, Malaysia, May 2016.

166. Y. Agata, J. Hong and T. Ohtsuki, “Room-Level Proximity Detection Based on RSS of Dual-Band Wi-Fi Signals,” IEEE International Conference on Communications (ICC’2016), Kuala Lumpur, Malaysia, May 2016.

167. O. Takyu, K. Matsumoto, T. Fujii, T. Ohtsuki, F. Sasamori, and S. Handa, “Optimal Impersonation of CSI for Maximizing Leaked Information to Untrusted Relay in PLNC,” IEEE Wireless Communications and Networking Conference (WCNC’2016), Doha, Qatar, Apr. 2016.

168. H. Hayashi and T. Ohtsuki, “DOA Estimation in MIMO Radar Using Temporal Spatial Virtual Array with MUSIC Algorithm,” International Conference on Signal Processing and Communication Systems (ICSPCS 2015), Cairns, Australia, Dec. 2015.

169. A. Beylerian and T. Ohtsuki, “Service-Aware User-Centric Clustering and Scheduling for Cloud-RAN with Coordinated Multi-Point Transmission,” Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC 2015), Hong Kong, Dec. 2015.

170. Y. Agata, J. Hong and T. Ohtsuki, “Room-Level Proximity Detection Using Beacon Frame from Multiple Access Points,” Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC 2015), Hong Kong, Dec. 2015.

171. H. Hayashi and T. Ohtsuki, “Performance of DOA Estimation Using Temporal Spatial Virtual Array,” International Workshop on Vision, Communications and Circuits (IWVCC 2015), Yokohama, Japan, Nov. 2015.

172. K. Kobayashi and T. Ohtsuki, “User Identification Based on Toothbrushing Information Using Three-Axis Accelerometer,” UbiComp/ISWC2015, Osaka, Japan, Sep. 2015.

173. M. Bouazizi and T. Ohtsuki, “Sarcasm Detection in Twitter,” IEEE Global Communications Conference (GLOBECOM2015), San Diego, CA, Dec. 2015.

174. M. Ozawa, T. Ohtsuki, W. Jiang, and Y. Takatori, “Interference Alignment for Time-varying Channel with Channel and Weight Predictions based on Auto Regressive Model,” IEEE Global Communications Conference (GLOBECOM2015), San Diego, CA, Dec. 2015.

175. Y. Huang, M. Chen, Z. Cai, X. Guan, C. Liu, and T. Ohtsuki, “Graph Theory Based Capacity Analysis for Vehicular Ad Hoc Networks,” IEEE Global Communications Conference (GLOBECOM2015), San Diego, CA, Dec. 2015.

176. R. Seno, T. Ohtsuki, W. Jiang, and Y. Takatori, “Complexity Reduction of Pico Cell Clustering for Interference Alignment in Heterogeneous Networks,” The 21st Asia-Pacific Conference on Communications (APCC2015), Kyoto, Japan, Oct. 2015.

177. Y. Shibata, T. Ohtsuki, and J. Mashino, “Undesired Signal Power Estimation Based on Estimated Superposed Band for Multicarrier Transmission,” The 21st Asia-Pacific Conference on Communications (APCC2015), Kyoto, Japan, Oct. 2015.

178. M. Ozawa and T. Ohtsuki, “Dynamic Almost Blank Subframe Assignment Method with Power Control Subframe for User Fairness,” The 21st Asia-Pacific Conference on Communications (APCC2015), Kyoto, Japan, Oct. 2015.

179. R. Seno, T. Ohtsuki, W. Jiang, and Y. Takatori, “Interference Alignment in Heterogeneous Networks using Pico Cell Clustering,” IEEE Vehicular Technology Conference (VTC2015-Fall), Boston, MA, Sep. 2015.

180. Y. Kakizaki, T. Ohtsuki, and J. Mashino, “Suppression of Multiple Interferences for Superposed Multicarrier Transmission,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2015), Hong Kong, China, Aug. Sep. 2015.

181. A.S. Arifin and T. Ohtsuki, “Ergodic Capacity Analysis of Full-Duplex Amplify-Forward MIMO Relay Channel Using Tracy-Widom Distribution,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2015), Hong Kong, China, Aug. Sep. 2015.

182. F.H. Panahi, T. Ohtsuki, W. Jiang, and Y. Takatori, “Interference Alignment for Multi-User MIMO Interference Channels via a Riemannian Optimization Approach,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2015), Hong Kong, China, Aug. Sep. 2015.

183. E. Mogi and T. Ohtsuki, “Heartbeat Detection with Doppler Sensor Using Adaptive Scale Factor Selection on Learning,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2015), Hong Kong, China, Aug. Sep. 2015.

184. S. Iwata and T. Ohtsuki, “On Secrecy Rate Analysis of MIMO Wiretap Channel Aided by A Cooperative Jammer with Channel Estimation Error,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2015), Hong Kong, China, Aug. Sep. 2015.

185. M. Bouazizi and T. Ohtsuki, “Opinion Mining in Twitter ~How to Make Use of Sarcasm to Enhance Sentiment Analysis~,” the 2015 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2015), Paris, France, Aug. 2015.

186. T. Ohtsuki and J. Mashino, “(Invited Paper) Superposed Multicarrier Transmission,” IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS2015), Singapore, Aug. 2015.

187. M. Ozawa and T. Ohtsuki, “Improvements of FBS Resource Utilization and ABS Assignment Convergence for Dynamic ABS Assignment,” IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS2015), Singapore, Aug. 2015.

188. M. Suzuki and T. Ohtsuki, “Evaluation of Effects of Audio and Video of Mother on Sense of Security and Communicative Action of Children Staying at Home,” IEEE Science and Information Conference 2015, London, UK, July 2015.

189. S. Tomii and T. Ohtsuki, “Heartbeat Detection by Using Doppler Radar with Wavelet Transform Based on Scale Factor Learning,” IEEE International Conference on Communications (ICC’2015), London, UK, June 2015.

190. S. Mashiyama, J. Hong, and T. Ohtsuki, “Activity Recognition Using Low Resolution Infrared Array Sensor,” IEEE International Conference on Communications (ICC’2015), London, UK, June 2015.

191. Y. Hino, J. Hong, and T. Ohtsuki, “Activity Recognition Using Array Antenna,” IEEE International Conference on Communications (ICC’2015), London, UK, June 2015.

192. F.H. Panahi and T. Ohtsuki, “Analytical Evaluation of Coverage Probability in Two-tier Cognitive Femto Networks,” IEEE Vehicular Technology Conference (VTC2015-Spring), Glasgow, Scotland, May 2015.

193. A. S. Arifin and T. Ohtsuki, “Global SNR Maximization for Distributed Estimation and Capacity of Data Collection in Wireless Sensor Networks Using Individual Power Constraint,” 2014 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC 2014), Siem Reap, Cambodia, Dec. 2014.

194. M. Yamaguchi, O. Takyu, T. Fujii, T. Ohtsuki, F. Sasamori, and S. Handa, “Physical Layer Network Coding with Multiple Untrusted Relays for Physical Layer Network Coding,” 2014 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC 2014), Siem Reap, Cambodia, Dec. 2014.

195. A. S. Arifin and T. Ohtsuki, “Analysis of Outage Probability for Full-Duplex SISO System with Self-Interference,” The 20th Asia-Pacific Conference on Communications (APCC2014), Pattaya, Thailand, Oct. 2014.

196. N.Yoda, T.Ohtsuki, J.Mashino, and T.Sugiyama, “Interference Suppression Using EM Algorithm in OFDM Transmissions,”IEEE Global Communications Conference (GLOBECOM2014), Austin, TX, Dec. 2014.

197. J.C.Corena and T.Ohtsuki, “Beyond Proofs of Data Possession: Finding Defective Blocks in Outsourced Storage,”IEEE Global Communications Conference (GLOBECOM2014), Austin, TX, Dec. 2014.

198. F.H.Panahi and T.Ohtsuki, “Analytical Modeling of Cognitive Heterogeneous Cellular Networks over Nakagami-m Fading,”IEEE Global Communications Conference (GLOBECOM2014), Austin, TX, Dec. 2014.

199. J.Hong and T.Ohtsuki, “Device-free passive localization from signal subspace eigenvectors,”IEEE Global Communications Conference (GLOBECOM2014), Austin, TX, Dec. 2014.

200. H.Zhuang and T.Ohtsuki, “Analytical Evaluation of Fractional Frequency Reuse for MIMO Heterogeneous Cellular Networks,”IEEE Global Communications Conference (GLOBECOM2014), Austin, TX, Dec. 2014.

201. K.Yamamoto and T.Ohtsuki, “Parameter Optimization Using Local Search for CRE and eICIC in Heterogeneous Network, “IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2014), Washington D.C., U.S.A., Sep. 2014.

202. C.Tamba, S.Tomii, and T.Ohtsuki, “Blink Detection using Doppler Sensor, “IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2014), Washington D.C., U.S.A., Sep. 2014.

203. M.Endo, T.Ohtsuki, T.Fujii, and O.Takyu, “Secondary Transmit Beamformings for Spectrum Leasing in CRNs in the Presence of Eavesdropper, “IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2014), Washington D.C., U.S.A., Sep. 2014.

204. Y.Shibata, N.Yoda, T.Ohtsuki, J.Mashino, and T.Sugiyama, “Iterative Estimation Of Undesired Signal Power For Superposed Multicarrier Transmission With Channel Estimation Error, “IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2014), Washington D.C., U.S.A., Sep. 2014.

205. Y.Murakami, and T.Ohtsuki, “Localization Calibration Using Illuminance Sensor for Pedestrian Dead Reckoning with Smartphones, “IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2014), Washington D.C., U.S.A., Sep. 2014.

206. S.Mashiyama, J.Hong, and T.Ohtsuki, “A Fall Detection System Using Low Resolution Infrared Array Sensor, “IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2014), Washington D.C., U.S.A., Sep. 2014.

207. Y.Hino, J.Hong, and T.Ohtsuki, “Detecting Unexpected Fall Using Array Antenna, “IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2014), Washington D.C., U.S.A., Sep. 2014.

208. A. Li, X. Guan, Z. Yang, and T. Ohtsuki, “Coalition Graph Game for Multi-hop Routing Path Selection in Cooperative Cognitive Radio Networks,” 9th International Conference on Communications and Networking in China 2014 (CHINACOM ’14), Maoming, China, Aug. 2014. (Best paper Award)

209. Y. Huang, H. Wu, Y. Zhang, X. Guan, and T. Ohtsuki, “Improve the Performance of Bus-assisted Vehicular Ad Hoc Networks via Cooperative Game Theory,” 9th International Conference on Communications and Networking in China 2014 (CHINACOM ’14), Maoming, China, Aug. 2014.

210. M. Yamamoto, and T. Ohtsuki, “Power Compensation in WLAN Positioning Using a Smartphone,” IEEE Ninth International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP2014), Singapore, Apr. 2014.

211. K. Matsumura and T. Ohtsuki, “Design Algorithm of Relative Magnitude Coefficients using Brent’s Method on the K-User MIMO-IFC,” IEEE International Conference on Communications (ICC’2014), Sydney, Australia, June 2014

212. F. H. Panahi and T. Ohtsuki, “Stochastic Geometry Based Analytical Modeling of Cognitive Heterogeneous Cellular Networks,” IEEE International Conference on Communications (ICC’2014), Sydney, Australia, June 2014

213. M. Yamamoto, T. Ohtsuki, H. Utsumi, and N. Furukawa, “Mobile-phone Indoor Localization Based on Microwave Identification Using Web-access Time,” 2014 IEEE Radio and Wireless Week (RWW 2014), Newport Beach, CA, Jan. 2014

214. J.C. Corona, A. Basu, S. Kiyomoto, Y. MIyake, and T. Ohtsuki, “XOR Network Coding Pollution Prevention Without Homomorphic Functions,” IEEE Consumer Communications and Networking Conference (CCNC2014), Las Vegas, NV, Jan. 2014

215. Jihoon Hong and Tomoaki Ohtsuki, “Array Sensor: Monitoring Using Wireless Signals,” Jeju Island, Korea, Oct. 2013

216. G. Hayashi, N. Yoda, T. Ohtsuki, J. Mashino, and T. Sugiyama, “Interference Detection Technique Based on Residual Power for Superposed Multicarrier Transmission,” IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS2013), Seoul, Korea, Aug. 2013

217. J.C. Corena and T. Ohtsuki, “Eavesdropper Resilient Network Coding Using Random Substitutions of the Global Encoding Matrix,” IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS2013), Seoul, Korea, Aug. 2013

218. K. Yamaguchi, O. Takyu, T. Fujii, T. Ohtsuki, S. Sasamori, and S. Handa, “Physical Layer Network Coding with Multiple Untrusted Relays for Physical Layer Network Coding,” IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS2013), Seoul, Korea, Aug. 2013

219. K. Tsukada, T. Suzuki, T. Fujii, O. Takyu, and T. Ohtsuki, “Secondary Node Cooperation with Enhancing Secure Capacity under Existence of Primary System,” IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS2013), Seoul, Korea, Aug. 2013

220. S. Oussama and T. Ohtsuki, “A Case where Noise Increases the Secrecy Capacity of Wiretap Channels,” IEEE Global Communications Conference (GLOBECOM2013), Atlanta, GA, Dec. 2013

221. J.C. Corena and T. Ohtsuki, “Proofs of Data Possession and Pollution Checking for Regenerating Codes,” IEEE Global Communications Conference (GLOBECOM2013), Atlanta, GA, Dec. 2013

222. J. Hong,  S. Tomii, and T. Ohtsuki, “Cooperative Fall Detection Using Doppler Radar and Array Sensor,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2013), London, UK, Sep. 2013

223. N. B. Harum,  K. Yuda, and T. Ohtsuki, “PAPR reduction of Ampify-and-Forward Relay OFDM System Using Subcarrier Pairing Method,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2013), London, UK, Sep. 2013

224. N. Yoda, G. Hayashi, T. Ohtsuki, J. Mashino, and T. Sugiyama, “Interference Detection Technique Using Robust LLR for Superposed Multicarrier Transmission,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2013), London, UK, Sep. 2013

225. J.C. Corena and T. Ohtsuki, “Load Balancing Regenerating Codes for Multimedia Content Streaming,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2013), London, UK, Sep. 2013

226. J. Hong and T. Ohtsuki, “Ambient Intelligence Sensing using Array Sensor: Device-Free Radio based Approach,” The 4th Workshop on Context-Systems Design, Evaluation and Optimisation (CoSDEO 2013): Device-Free Radio-Based recognition, Zurich, Switzerland, Sep. 2013

227. T. Kudo and T. Ohtsuki, “Cell Range Expansion Using Distributed Q-Learning in Heterogeneous Networks,” IEEE Vehicular Technology Conference (VTC2013-Fall), Las Vegas, USA, Sep. 2013

228. F. H. Panahi and T. Ohtsuki, “Optimal Channel-Sensing Policy Based on Fuzzy Q-Learning Process over Cognitive Radio Systems,” IEEE International Conference on Communications (ICC’2013), Budapest, Hungary, June 2013

229. Y. Okamoto and T. Ohtsuki, “Human Activity Classification and Localization Using Bistatic Three Frequency CW Radar,” IEEE International Conference on Communications (ICC’2013), Budapest, Hungary, June 2013

230. Y. Okamoto and T. Ohtsuki, “Human Activity Classification and Localization Algorithm Based on Temporal-Spatial Virtual Array,” IEEE International Conference on Communications (ICC’2013), Budapest, Hungary, June 2013

231. Y. Huang, X. Guan, Z. Cai, and T. Ohtsuki, “Multicast Capacity Analysis for Social-Proximity Urban Bus-Assisted VANETs,” IEEE International Conference on Communications (ICC’2013), Budapest, Hungary, June 2013

232. A. S. Arifin and T. Ohtsuki, “Linear Precoding for Distributed Estimation of Correlated Sources in WSN MIMO System,” IEEE Vehicular Technology Conference (VTC2013-Spring), Dresden, Germany, June 2013

233. G. Hayashi and T. Ohtsuki, “Interference Mitigation Depending on the Number of Antennas and CSI Available at Femtocells,”  International Symposium on Information Theory and Its Applications (ISITA2002), Honolulu, HI, Oct. 2012 (accepted for publication)

234. S. Tomii and T. Ohtsuki, “Falling Detection Using Multiple DopplerSensors,” IEEE 14th International Conference on e-Health Networking, Applications and Services (Healthcom 2012), Beijing, China, Oct. 2012 (accepted for publication)

235. J.C. Corena and T. Ohtsuki, “Thwarting Diversity Attacks in Wireless Network Coding Using Threshold Signatures and a Sender-Centered Approach,” IEEE Global Communications Conference (GLOBECOM2012), Anaheim, LA, Dec. 2012 (accepted for publication)

236. D. Chaima and T. Ohtsuki, “Q-Learning Cell Selection for Femtocell Networks: Single- and Multi-User Case,” IEEE Global Communications Conference (GLOBECOM2012), Anaheim, LA, Dec. 2012 (accepted for publication)

237. K. Matsumura and T. Ohtsuki, “Design Method of Relative Magnitude Coefficients Considering Rotation of Basis Vectors in Interference Space on the K-User MIMO Interference Channel for Downlink System,” IEEE Global Communications Conference (GLOBECOM2012), Anaheim, LA, Dec. 2012 (accepted for publication)

238. F. Dirhold and T. Ohtsuki, “A New Human Model for Doppler Radar Simulation,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2012), Sydney, Australia, Sep. 2012

239. Y. Inatomi, J. Hong and T. Ohtsuki, “Hidden Markov Model Based Localization Using Array Antenna,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2012), Sydney, Australia, Sep. 2012

240. J.C. Corena and T. Ohtsuki, “A Multiple-MAC-Based Protocol to Identify Misbehaving Nodes in Network Coding,” IEEE Vehicular Technology Conference (VTC2012-Fall), Quebec, Canada, Sep. 2012 

241. K. Mitsuyama, T. Ikeda, and T. Ohtsuki, “Hardware Implementation of Proposed Antenna Selection Algorithm and its Performance Evaluation Using Received Signals in Field Experiment,” IEEE Vehicular Technology Conference (VTC2012-Fall), Quebec, Canada, Sep. 2012 

242. T. Yamada and T. Ohtsuki, “High Power Efficiency Transmission Based on Game Theory for AF Cooperative Communication,” IEEE Vehicular Technology Conference (VTC2012-Fall), Quebec, Canada, Sep. 2012

243. X. Guan, M. Chen, and T. Ohtsuki, “Epidemic Theory based H + 1 hop Forwarding for Intermittently Connected Mobile Ad Hoc Networks,” IEEE International Conference on Communications (ICC 2012), Ottawa, CA, June 2012 (accepted for publication)

244. T. Yamada and T. Ohtsuki, “Cooperative ARQ with Fairness via Vickrey Auction-Based Spectrum Leasing,” IEEE Vehicular Technology Conference (VTC2012-Spring), Yokohama, Japan, May 2012 (accepted for publication)

245. D. Chaima and T. Ohtsuki, “Learning-based Cell Selection Method for Femtocell Networks,” IEEE Vehicular Technology Conference (VTC2012-Spring), Yokohama, Japan, May 2012 (accepted for publication)

246. J. Marouan and T. Ohtsuki, “Joint SVD-GSVD Precoding Technique and Secrecy Capacity Lower Bound for the MIMO Relay Wire-tap Channel,” IEEE Vehicular Technology Conference (VTC2012-Spring), Yokohama, Japan, May 2012 (accepted for publication)

247. T. Ohtsuki, G. Hayashi, J. Mashino, and T. Sugiyama, “Superposed Band Detection Based on Error Probability Using Initial Likelihood Masking,” IEEE Vehicular Technology Conference (VTC2012-Spring), Yokohama, Japan, May 2012 (accepted for publication)

248. J. Hong, S. Kawakami, and T. Ohtsuki, “Passive Localization Using Array Sensor With Support Vector Machine,” 9th Workshop on Positioning, Navigation and Communication 2012 (WPNC2012), Dresden, Germany, Mar. 2012

249. K. Takano, K. Adachi, and T. Ohtsuki, “Transmit and Receive Weights in Vector Coding with Channel Estimation Error and Feedback Delay,” IEEE Global Communications Conference (GLOBECOM2011), Houston, TX, Dec. 2011(accepted for publication)

250. K. Mitsuyama, T. Ikeda, and T. Ohtsuki, “Development of MMSE macro-diversity receiver with delay difference correction technique,” IEEE Global Communications Conference (GLOBECOM2011), Houston, TX, Dec.2011 (accepted for publication)

251. X. Guan, M. Chen, C. Liu, H. Chen, and T. Ohtsuki, “Trajectory Optimization of Packet Ferries in Sparse Mobile Social Networks,” IEEE Global Communications Conference (GLOBECOM2011), Houston, TX, Dec. 2011(accepted for publication)

252. C. Sertthin, T. Fujii, O. Takyu, Y. Umeda, and T. Ohtsuki, “On Physical Layer Simulation Model for 6-Axis Sensor Assisted VLC Based Positioning System,” IEEE Global Communications Conference (GLOBECOM2011), Houston,TX, Dec. 2011 (accepted for publication)

253. W. Zhang, H. Chen, Q. Yin, and T. Ohtsuki, “Blind Carrier Frequency Offset Estimation for MIMO OFDMA Uplink,” IEEE Global CommunicationsConference (GLOBECOM2011), Houston, TX, Dec. 2011 (accepted for publication)

254. C. Sertthin, O. Takyu, T. Fujii, and T. Ohtsuki, “A Nearest Transmitter Classification Method for VLC Based Positioning System,”IEEE International Symposium on Personal Indoor and Mobile RadioCommunications (PIMRC2011), Toronto, Canada, Sep. 2011

255. J. Hong and T. Ohtsuki, “A State Classification Method Based on Space-Time Signal Processing Using SVM for Wireless Monitoring Systems,”IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2011), Toronto, Canada, Sep. 2011

256. P. Charoen and T. Ohtsuki, “Interference Mitigation for Multi-cell Downlink Multiuser MIMO Network,” IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS2011), Singapore, Aug. 2011 (accepted for publication)

257. P. Charoen and T. Ohtsuki, “Codebook Based Interference Mitigation with Base Station Cooperation in Multi-cell Cellular Network,” IEEE Vehicular Technology Conference (VTC2011-Fall), SF, USA, Sep. 2011 (accepted for publication)

258. H. Yano, O. Takyu, T. Fujii, and T. Ohtsuki, “Low Complexity Cyclostationary Feature Detection Method to Compenstate Cyclostationarity-Degradation by Guard Interval Insertion,” 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications (CROWNCOM), Oska, Japan, June 2011. (accepted for publication)

259. X. Guan, C. Liu, M. Chen, H. Chen, and T. Ohtsuki, “Internal Threats Avoiding based Forwarding Protocol in Social Selfish Delay Tolerant Networks,” IEEE International Conference on Communications (ICC 2011), Kyoto, Japan, June 2011. (accepted for publication)

260. W. Zhang, Q. Yin, H. Chen, W. Wang, and T. Ohtsuki, “Distributed Angle Estimation for Wireless Sensor Network Localization with Multipath Fading,” IEEE International Conference on Communications (ICC 2011), Kyoto, Japan, June 2011. (accepted for publication)

261. K. Yamamoto, K. Adachi, and T. Ohtsuki, “Phase Rotation Sequence Selection Method for IFDMA with DDCE,” IEEE Vehicular Technology Conference (VTC2011-Spring), Budapest, Hungary, May 2011 (accepted for publication)

262. H. Kizuka, K. Adachi, and T. Ohtsuki, “Frequency Band Allocation in MIMO System Based on Received Power Difference among Users,” IEEE Vehicular Technology Conference (VTC2011-Spring), Budapest, Hungary, May 2011 (accepted for publication)

263. K. Matsumura and T. Ohtsuki, “Orthogonal Beamforming Using Gram-Schmidt Orthogonalization for Multi-User MIMO Downlink System,” IEEE Vehicular Technology Conference (VTC2011-Spring), Budapest, Hungary, May 2011 (accepted for publication)

264. O. Souihli and T. Ohtsuki, “A Novel Capacity Outer Bound for the MIMO Gaussian Interference Channel and Application to Relay-Assisted Communications,” IEEE Global Telecommunications Conference (GLOBECOM’2010), Miami, USA, Dec. 2010.

265. M. Yamada and T. Ohtsuki, “Interference Alignment in the 2 × (1+N) MIMO Model,” IEEE Global Telecommunications Conference (GLOBECOM’2010) Workshop on Advances in Communications and Networks (ACN 2010), Miami, USA, Dec. 2010.

266. N.B. Harum and T. Ohtsuki, “PAPR Reduction of TD-SCDMA System with Joint Transmission Technique,” The 2010 International Symposium on Communications and Information Technologies, Tokyo, Japan, Oct. 2010.

267. T.Z. Myint and T. Ohtsuki, “Range-Free Localization Algorithm Using Local Expected Hop Length in Wireless Sensor Network,” The 2010 International Symposium on Communications and Information Technologies, Tokyo, Japan, Oct. 2010.

268. T. Sakaguchi and T. Ohtsuki, “Cooperative Spectrum Sensing Techniques Using Decision Comparison for Cognitive Radio Systems Including Malicious Nodes,” The 2010 International Symposium on Communications and Information Technologies, Tokyo, Japan, Oct. 2010.

269. N. Lynn, O. Takyu, K. Adachi, T. Ohtsuki, and M. Nakagawa, “Cooperative ARQ using Distributed Relay Selection and Inter-relay Opportunistic Listening,” Third International Workshop onWireless Distributed Networks (WDN) at IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2010), Istanbul, Turkey, Sep. 2010.

270. K. Mitsuyama, T. Ikeda, and T. Ohtsuki, “Practical Delay Difference Correction in Distributed MIMO OFDM Systems,” 2010 IEEE International Conference on Wireless Information Technology and Systems, Honolulu, USA, Aug.-Sep. 2010.

271. O. M. Rodriguez and T. Ohtsuki, “Weighted Localization Accuracy Augmentation for RSSI-Based Wireless Sensor Networks Using Target-to-Target Measurements,” 2010 IEEE International Conference on Wireless Information Technology and Systems, Honolulu, USA, Aug.-Sep. 2010.

272. S. Kawakami and T. Ohtsuki, “Virtual Array Composition for Iterative AOA Localization Sharing Snapshots of Coherent Subarrays,” 2010 IEEE International Conference on Wireless Information Technology and Systems, Honolulu, USA, Aug.-Sep. 2010.

273. M. Yanase and T. Ohtsuki, “User Selection Scheme with Secrecy Capacity Between Other Users in MIMO Downlink Systems,” 2010 IEEE International Conference on Wireless Information Technology and Systems, Honolulu, USA, Aug.-Sep. 2010.

274. Y. Okamoto and T. Ohtsuki, “Iterative Focusing Algorithm to Estimate Moving Target,” 2010 IEEE International Conference on Wireless Information Technology and Systems, Honolulu, USA, Aug.-Sep. 2010.

275. T. Ohtsuki, “(Invited Paper) Wireless Security and Monitoring System Based on Space-Time Signal Processing,” The Second International Conference on Ubiquitous and Future Networks, Jeju Island, Korea, June 2010.

276. O. Souihli and T. Ohtsuki, “The MIMO Relay Channel in The Presence of Keyhole Effects,” IEEE International Conference on Communications (ICC2010), Capetown, South Africa, June 2010.

277. O. Souihli and T. Ohtsuki, “Network MIMO in The Presence of Transmit Desynchronization,” IEEE International Conference on Communications (ICC2010), Capetown, South Africa, June 2010.

278. K. Okane and T. Ohtsuki, “Resolution Improvement of Wideband Direction-Of-Arrival Estimation “Squared-TOPS”,” IEEE International Conference on Communications (ICC2010), Capetown, South Africa, June 2010.

279. N. Tsuji and T. Ohtsuki, “Initial LLR Setting for Belief Propagation Decoding in Relay System,” IEEE International Conference on Communications (ICC2010), Capetown, South Africa, June 2010.

280. O. Souihli and T. Ohtsuki, “Transparent Inband Feedback for Training-Based MIMO Systems,” IEEE Vehicular Technology Conference (VTC2010-Spring), Taipei, Taiwan, June 2010 (accepted for publication)

281. Y. Kumano and T. Ohtsuki, “Half-Duplex Relaying with Serially-Concatenated Low-Density Generator Matrix (SCLDGM) Codes,” IEEE Vehicular Technology Conference (VTC2010-Spring), Taipei, Taiwan, June 2010 (accepted for publication)

282. N. Tsuji and T. Ohtsuki, “Extrinsic Information Setting for Belief Propagation Decoding with Network Coding,” IEEE Vehicular Technology Conference (VTC2010-Spring), Taipei, Taiwan, June 2010 (accepted for publication)

283. T. Ohtsuki, “(Keynote Lecture) Security System Using Radio Waves Based on Space-Time Signal Processing,”International Conference on Precision Instrumentation and Measurement 2010, Kiryu, Japan, Mar. 2010

284. T.Z. Min and T. Ohtsuki, “Range-Free Localization Algorithm Using Distance Deviation Weighted Factor in Wireless Sensor Network,” the 2nd AUN/SEED-Net Regional Conference on Information and Communication Technology, Yogyakarta, Indonesia, Mar. 2010.

285. S. Kawakami, K. Okane, and T. Ohtsuki, “Detection Performance of Security System Using Radio Waves Based on Space-Time Signal Processing,” Procedia–Social and Behavioral Sciences, Elsevier, vol. 2, issue 1, pp. 171–178, 2010.

286. M. Yanase and T. Ohtsuki, “User Selection Scheme with Secrecy Capacity in MIMO Downlink Systems,” Procedia–Social and Behavioral Sciences, Elsevier, vol. 2, issue 1, pp. 161–170, 2010.

287. K. Mitsuyama, K. Kambara, T. Nakagawa, T. Ikeda, and T. Ohtsuki, “Performance Evaluation of Iterative LDPC-Coded MIMO OFDM System with Time Interleaving in Mobile Line-of-sight Environments,” International ITG Workshop on Smart Antennas – WSA 2010, Bremen, Germany, Feb. 2010

288. O. Souihli and T. Ohtsuki, “Cooperative Diversity Can Mitigate Keyhole Effects in Wireless MIMO Systems,” IEEE Global Telecommunications Conference (GLOBECOM’2009), Hawaii, USA, Nov.-Dec. 2009.

289. T. Ohtsuki, “(Keynote Lecture) Security System Using Radio Waves Based on Space-Time Signal Processing,” 2009 International Conference on Wireless Communications and Signal Processing (WCSP 2009), Nanjing, China, Nov. 2009

290. T. Ohtsuki, “(Keynote Lecture) Security System Using Radio Waves Based on Space-Time Signal Processing,” International Conference on Security Camera Network, Privacy Protection and Community Safety 2009, Kiryu, Japan, Oct. 2009

291. S. Kawakami, K. Okane, and T. Ohtsuki, “(Invited Paper) Detection Performance of Security System Using Radio Waves Based on Space-Time Signal Processing,” International Conference on Security Camera Network, Privacy Protection and Community Safety 2009, Kiryu, Japan, Oct. 2009

292. M. Yanase and T. Ohtsuki, “(Invited Paper) User Selection Scheme With Secrecy Capacity In MIMO Downlink Systems,” International Conference on Security Camera Network, Privacy Protection and Community Safety 2009, Kiryu, Japan, Oct. 2009

293. K. Okane, S. Ikeda, and T. Ohtsuki, “Improvement of Estimation Accuracy of Wideband DOA Estimation “TOPS”,”  2009 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC 2009), Sapporo, Japan, pp. 98–104, Oct. 2009

294. S. Kawakami, S. Ikeda, and T. Ohtsuki, “Localization Using Iterative Angle of Arrival Method Sharing Snapshots of Coherent Subarrays,” 2009 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC 2009), Sapporo, Japan, pp. 883–886, Oct. 2009

295. J.H. Lee, T. Ohtsuki, and M. Nakagawa, “Performance of Turbo Equalized Double Window Cancellation and Combining in Large Delay Spread Channels,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2009), Tokyo, Japan, Sep. 2009

296. S. Ikeda, T. Ohtsuki, and H. Tsuji, “Signal-Subspace-Partition Event Filtering for Eigenvector-Based Security System Using Radio Waves,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2009), Tokyo, Japan, pp. 2792–2796, Sep. 2009.

297. Z. Min and T. Ohtsuki, “An Improved User Selection Algorithm in Multiuser MIMO Broadcast,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2009), Tokyo, Japan, Sep. 2009

298. N. Tsuji and T. Ohtsuki, “Initial LLR Setting for Belief Propagation Decoding with Network Coding,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2009), Tokyo, Japan, Sep. 2009.

299. T. Ohtsuki, “(Invited Paper) Feedback Reduction in Multiuser MIMO,” International Symposium on Wireless Personal Multimedia Communications (WPMC’09), Sendai, Japan, Sep. 2009.

300. M. Yanase and T. Ohtsuki, “User Selection with Secrecy Capacity in Multiuser MIMO Downlink System,” International Symposium on Wireless Personal Multimedia Communications (WPMC’09), Sendai, Japan, Sep. 2009

301. J. Hirosawa and T. Ohtsuki, “Collaborative Decoding in a Small Number of Quantization Bits,” International Symposium on Wireless Personal Multimedia Communications (WPMC’09), Sendai, Japan, Sep. 2009

302. T. Saito and T. Ohtsuki, “LDPC Coded Hybrid ARQ Scheme with Reduced Feedback Information,” International Symposium on Wireless Personal Multimedia Communications (WPMC’09), Sendai, Japan, Sep. 2009

303. O. Souihli and T. Ohtsuki, “Joint Feedback and Scheduling Scheme for Service-Differentiated Multiuser MIMO Systems,” IEEE Vehicular Technology Conference (VTC2009-Fall), Anchorage, Alaska, Sep. 2009

304. N. Kitakoga and T. Ohtsuki, “A Localization Algorithm for Nonuniform Propagation Environments in Sensor Networks,” The 3rd IEEE International Workshop on Performance Modeling and Evaluation in Computer and Telecommunication Networks (PMECT2009), SF, USA, pp. 1–5, Aug. 2009.

305. X. Guan, L. Guan, X.G. Wang, and T. Ohtsuki, “A Novel Routing Algorithm based on Ant Colony System for Wireless Sensor Networks,” The 3rd IEEE International Workshop on Performance Modeling and Evaluation in Computer and Telecommunication Networks (PMECT2009), SF, USA, pp. 1–5, Aug. 2009.

306. O. Souihli and T. Ohtsuki, “The Two-Way MIMO Wire-Tap Channel,” IEEE International Conference on Communications (ICC2009), Dresden, Germany, June 2009.

307. T. Fujita and T. Ohtsuki, “Low Complexity Localization Algorithm Based on NLOS Node Identification Using Minimum Subset for NLOS Environments,” IEEE Global Telecommunications Conference (GLOBECOM’2008), New Orleans, USA, Nov.-Dec. 2008.

308. N. Kitakoga and T. Ohtsuki, “Distributed EM Algorithms for Localization Using RSS in Sensor Networks,” International Workshop on Vision, Communications and Circuits (IWVCC 2008), Xi’an, China, Nov. 2008.

309. T. Mogi and T. Ohtsuki, “TOA Localization using RSS Weight with Path Loss Exponents Estimation in NLOS Environments,” The 14th Asia-Pacific Conference on Communications (APCC2008), Akihabara, Japan, Oct. 2008.

310. T. Sakaguchi and T. Ohtsuki, “A Study on Filterings in Non-coherent TOA Estimation in TH-UWB-IR Systems,” The 14th Asia-Pacific Conference on Communications (APCC2008), Akihabara, Japan, Oct. 2008.

311. Y. Nishi and T. Ohtsuki, “A Distributed Localization with Unknown Attenuation Coefficient in Wireless Sensor Networks,” The 14th Asia-Pacific Conference on Communications (APCC2008), Akihabara, Japan, Oct. 2008.

312. S. Ikeda, T. Ohtsuki, and H. Tsuji, “Indoor Event Detection with Eigenvector Spanning Signal Subspace for Home or Office Security,” IEEE Vehicular Technology Conference (VTC2008-Fall), Calgary, Sep. 2008.

313. Y. Eriguchi and T. Ohtsuki, “A Random Beamforming Technique in Multiuser Multi-Antenna OFDM Systems For Large System Capacity and Fairness Among Users,” IEEE Vehicular Technology Conference (VTC2008-Fall), Calgary, Sep. 2008.

314. J. Hirosawa and T. Ohtsuki, “Collaborative Decoding Based on Average LLR per Segment,” IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS2008), Sendai, Japan, Aug. 2008.

315. Y. Kumano and T. Ohtsuki, “Analysis and Design of Serially-Concatenated Low-Density Generator Matrix (SCLDGM) Codes with Turbo Decoding,” IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS2008), Sendai, Japan, Aug. 2008.

316. K. Kobayashi, T. Ohtsuki, T. Kashima, and S. P.W. Jarot, “MIMO System with Relative Phase Difference Time-Shift Modulation in Rician Fading Environments,” IEEE International Conference on Communications (ICC2008), Beijin, China, pp. 732–736, May 2008.

317. J. Shirahama and T. Ohtsuki, “RSS-Based Localization in Environments with Different Path Loss Exponent for Each Link,” IEEE Vehicular Technology Conference (VTC2008-Spring), Singapore, pp. 1509–1513, May 2008.

318. J. Zhou, Z. Xie, and T. Ohtsuki, “Codes with Low Peak-to-Average Power Ratio for Multi-Code CDMA,” Future Generation Communication and Networking, Jeju, Korea, pp. 27–31, Dec. 2007.

319. K. Kobayashi, T. Ohtsuki, and T. Kaneko, “Precoding for MIMO Systems in Line-Of-Sight (LOS) Environment,” IEEE Global Telecommunications Conference (GLOBECOM’2007), Washington DC, USA, pp. 4370–4374, Nov.-Dec. 2007.

320. S. Ikeda, H. Tsuji, and T. Ohtsuki, “Effects of Spatial Correlation Between Signal Subspaces on Indoor Localization Using Subspace Matching,” IEEE TENCON’2007, Taipei, Taiwan, pp. 1–4, Oct.-Nov. 2007.

321. I. Yamada, T. Ohtsuki, T. Hisanaga, and L. Zheng, “An Indoor Position Estimation Method by Maximum Likelihood Algorithm Using RSS,” International Conference on Instrumentation, Control and Information Technology, Takamatsu, Japan, pp. 2927–2930, Sep. 2007.

322. Y. Tsuchiya, T. Ohtsuki, and T. Kaneko, “Random Beamforming Using Low Feedback and Low Latency Power Allocation,” IEEE Vehicular Technology Conference (VTC2007-Fall), Baltimore, MA, pp. 402–406, Oct. 2007.

323. D. Abematsu, T. Ohtsuki, T. Kashima, and S. P.W. Jarot, “Size Compatible (SC)-Array LDPC Codes,” IEEE Vehicular Technology Conference (VTC2007-Fall), Baltimore, MA, pp. 1147–1151, Oct. 2007.

324. Y. Kumano and T. Ohtsuki, “On Construction of Concatenated Low-Density Generator Matrix Codes,” 2007 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, Canada, pp. 442–445, Aug. 2007.

325. S. Yoshida and T. Ohtsuki, “Effect of Imperfect Channel Estimation on the Performance of UWB-IR with Frequency-Domain Equalization (FDE) and Cyclic Prefix (CP) Reconstruction,” 2007 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, Canada, pp. 342–345, Aug. 2007.

326. D. Abematsu, T. Ohtsuki, T. Kashima, and S. P.W. Jarot, “LDPC Codes for High Data Rate Multiband OFDM Systems over 1Gbps,” 2007 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, Canada, pp. 338–341, Aug. 2007.

327. J. Zhou and T. Ohtsuki, “Isomorphic Constructions of Tail-Biting Trellises for Linear Block Codes,” Second International Conference on Communications and Networking in China 2007 (CHINACOM ’07), Shanghai, China, pp. 585–589, Aug. 2007.

328. S. Gounai and T. Ohtsuki, “Mapping for Iterative MMSE-SIC with Belief Propagation,” IEEE International Conference on Communications (ICC2007), Glasgow, pp. 4885–4890, June 2007.

329. D. Takase and T. Ohtsuki, “Optical Wireless MIMO (OMIMO) with Backward Spatial Filter (BSF) in Diffuse Channels,” IEEE International Conference on Communications (ICC2007), Glasgow, pp. 2462–2467, June 2007.

330. K. Kobayashi, T. Ohtsuki, and T. Kaneko, “Throughput Maximization Transmission Control Scheme Using Precoding for MIMO Systems,” IEEE International Conference on Communications (ICC2007), Glasgow, pp. 5098–5102, June 2007.

331. H. Sato, T. Ohtsuki, T. Kashima, and S. P.W. Jarot, “MultiBand-OFDM System with Concatenated Coding Scheme,” IEEE Vehicular Technology Conference (VTC2007-Spring), Dublin, Ireland, pp. 2165–2169, Apr. 2007.

332. K. Honjo and T. Ohtsuki, “LLR Based Iterative Reduced-Complexity MLD Algorithm with Parallel Interference Cancellation (PIC) in MIMO Systems,” IEEE Vehicular Technology Conference (VTC2007-Spring), Dublin, Ireland, pp. 2324–2328, Apr. 2007.

333. Y. Tsuchiya, T. Ohtsuki, and T. Kaneko, “Scheduling Algorithm with Power Allocation for Random Unitary Beamforming,” IEEE Vehicular Technology Conference (VTC2007-Spring), Dublin, Ireland, pp. 1668–1672, Apr. 2007.

334. Y. Eriguchi, T. Ohtsuki, and T. Kaneko, “Low Computational Complexity 2-Dimensional Pilot-Symbol-Assisted (2-D PSA) MMSE Channel Estimation with Extended Estimation Size for MIMO-OFDM Systems,” IEEE Communications $\&$ Networking Conference (WCNC’2007), Hong Kong, pp. 181–185, Mar. 2007.

335. F. Tsuzuki and T. Ohtsuki, “SAGE Algorithm for Channel Estimation and Data Detection Using Superimposed Training in MIMO System,” IEEE Global Telecommunications Conference (GLOBECOM’2006), San Francisco, CA, USA, pp. 1–5, Nov.-Dec. 2006.

336. S. Gounai and T. Ohtsuki, “Convergence Acceleration of Iterative Signal Detection for MIMO System with Belief Propagation,” IEEE Global Telecommunications Conference (GLOBECOM’2006), San Francisco, CA, USA, Nov.-Dec. 2006.

337. Y. Inaba, T. Saito, and T. Ohtsuki, “Reliability-Based Hybrid ARQ (RB-HARQ) Schemes using Low-Density Parity-Check (LDPC) Codes,” IEEE Global Telecommunications Conference (GLOBECOM’2006), San Francisco, CA, USA, Nov.-Dec. 2006.

338. A. Inoue and T. Ohtsuki, “Performance Evaluation of Layered Space-Frequency Equalization with Iterative Cancellation,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2006), Helsinki, Finland, Sep. 2006.

339. N. Kitakoga and T. Ohtsuki, “Distributed EM Algorithms for Acoustic Source Localization in Sensor Networks,” IEEE Vehicular Technology Conference (VTC2006-Fall), Montreal, Canada, Sep. 2006.

340. S. Gounai and T. Ohtsuki, “Performance Analysis of LDPC Code with Spatial Diversity,” IEEE Vehicular Technology Conference (VTC2006-Fall), Montreal, Canada, Sep. 2006.

341. K. Kobayashi, T. Ohtsuki, and T. Kaneko, “MMSE Precoder with Mode Selection for MIMO Systems,” IEEE Vehicular Technology Conference (VTC2006-Fall), Montreal, Canada, Sep. 2006.

342. T. Fujita, T. Ohtsuki, and T. Kaneko, “Estimation Method of False Alarm Probability and Observation Noise Variance in Wireless Sensor Networks,” The 9th International Conference on Information Fusion, Florence, Italy, July 2006.

343. S. Gounai, T. Ohtsuki, and T. Kaneko, “Performance of Concatenated Code with LDPC Code and RSC Code,” IEEE International Conference on Communications (ICC2006), Istanbul, Turkey, June 2006.

344. K. Kobayashi, T. Ohtsuki, and T. Kaneko, “MIMO Systems in the Presence of Feedback Delay,” IEEE International Conference on Communications (ICC2006), Istanbul, Turkey, June 2006.

345. J. Shirahama, T. Ohtsuki, and T. Kaneko, “Method of Reducing Search Area for Localization in Sensor Networks,” IEEE Vehicular Technology Conference (VTC2006-Spring), Melbourne, Australia, May 2006.

346. S. Gounai, T. Ohtsuki, and T. Kaneko, “Modified Belief Propagation Decoding Algorithm for Low-Density Parity Check Code Based on Oscillation,” IEEE Vehicular Technology Conference (VTC2006-Spring), Melbourne, Australia, May 2006.

347. S. Imada, H. Sato, T. Ohtsuki, P. Priotti, and H. Chen, “Throughput Evaluation of MultiBand OFDM System and DS-UWB System on IEEE 802.15.3a UWB Channel Model,” 2005 International Workshop on UWB Technologies (IWUWBT2005), pp. 34–38, Yokosuka, Japan, Dec. 2005.

348. H. Yamamoto and T. Ohtsuki, “Wireless Sensor Networks with Local Fusion,” IEEE Global Telecommunications Conference (GLOBECOM’2005), St. Louis, MO, USA, Nov.-Dec. 2005.

349. T. Someya and T. Ohtsuki, “Channel Estimation and Data Detection with Tracking the Channel Variation in MIMO System using ZF-based SAGE Algorithm,” IEEE Global Telecommunications Conference (GLOBECOM’2005), St. Louis, MO, USA, Nov.-Dec. 2005.

350. Y. Takei and T. Ohtsuki, “Throughput Maximization Transmission Control Scheme Using Channel Prediction for MIMO Systems,” IEEE Global Telecommunications Conference (GLOBECOM’2005), St. Louis, MO, USA, Nov.-Dec. 2005.

351. J. Shirahama, T. Ohtsuki, and T. Kaneko, “Low Complexity Source Localization Algorithm in Sensor Networks,” The 2nd ACM International Workshop on Performance Evaluation of Wireless Ad Hoc, Sensor, and Ubiquitous Networks (PE-WASUN 2005), pp. 130–136, Montreal, Canada, Oct. 2005.

352. T. Ohtsuki, “Performance Analysis of Statistical STBC Cooperative Diversity Using Binary Sensors with Observation Noise,” IEEE Vehicular Technology Conference (VTC2005-Fall), Dallas, TX, pp. 2030–2033, Sep. 2005.

353. H. Matsuda, K. Hojyo, T. Ohtsuki, and T. Kaneko, “Signal Detection Scheme Combining MMSE V-BLAST and Variable K-best Algorithms Based on Minimum Branch Metric,” IEEE Vehicular Technology Conference (VTC2005-Fall), Dallas, TX, pp. 19–23, Sep. 2005.

354. S. Yoshida, T. Ohtsuki, and T. Kaneko, “Improvement of Bandwidth Efficiency of UWB-IR and DS-UWB with Frequency-Domain Equalization (FDE) based on Cyclic Prefix (CP) Reconstruction,” IEEE Vehicular Technology Conference (VTC2005-Fall), Dallas, TX, pp. 991–995, Sep. 2005.

355. K. Kobayashi, T. Ohtsuki, and T. Kaneko, “Performance Evaluation of Ultra Wideband-Impulse Radio (UWB-IR) with Iterative Equalization based on Energy Spreading Transform (EST),” IEEE Vehicular Technology Conference (VTC2005-Fall), Dallas, TX, pp. 996–1000, Sep. 2005.

356. Y. Takei and T. Ohtsuki, “Uplink Pre-Equalization Using MMSE Prediction for TDD/MC-CDMA Systems,”  IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2005), Berlin, Germany, Sep. 2005.

357. Y. Hara, A. Taira, K. Suto, and T. Ohtsuki, “(Invited) Transmission Control Scheme for Throughput Maximization in MIMO Systems,” 2005 International Symposium on Antennas and Propagation (ISAP2005), Seoul, Korea, Aug. 2005.

358. K. Yamasaki and T. Ohtsuki, “Design of Energy-Efficient Wireless Sensor Networks with Censoring, On-Off, and Censoring and On-Off Sensors Based on Mutual Information,” IEEE Vehicular Technology Conference (VTC2005-Spring), Stockholm, Sweden, pp. 1312–1316, May 2005.

359. S. Gounai and T. Ohtsuki, “Lowering Error Floors of Irregular LDPC Code on Fast Fading Environment with and without Perfect CSI,” IEEE Vehicular Technology Conference (VTC2005-Spring), Stockholm, Sweden, pp. 634–638, May 2005.

360. H. Sato and T. Ohtsuki, “Performance Evaluation of Frequency Domain Equalization and Channel Estimation for Direct Sequence- Ultra Wideband (DS-UWB) System,” IEEE Vehicular Technology Conference (VTC2005-Spring), Stockholm, Sweden, pp. 481–485, May 2005.

361. D. Takase and T. Ohtsuki, “Performance Analysis of Optical Wireless MIMO with Optical Beat Interference,” IEEE International Conference on Communications (ICC2005), Seoul, Korea, pp. 954–958, May 2005.

362. D. Takase and T. Ohtsuki, “Optical Wireless MIMO Communications (OMIMO),” IEEE Global Telecommunications Conference (GLOBECOM’2004), Dallas, TX, USA, pp. 928–932, Nov. 2004.

363. S. Teramoto and T. Ohtsuki, “Optical Wireless Sensor Network System Using Corner Cube Retroreflectors (CCRs),” IEEE Global Telecommunications Conference (GLOBECOM’2004), Dallas, TX, USA, pp. 1035–1039, Nov. 2004.

364. K. Wakafuji and T. Ohtsuki, “Performance Analysis of Multibits/Sequence-Period Optical CDMA Receiver with Double Optical Hardlimiters,” IEEE Global Telecommunications Conference (GLOBECOM’2004), Dallas, TX, USA, pp. 1030–1034, Nov. 2004.

365. Y. Ishiyama and T. Ohtsuki, “Performance Evaluation of UWB-IR and DS-UWB with MMSE-Frequency Domain Equalization (FDE),” IEEE Global Telecommunications Conference (GLOBECOM’2004), Dallas, TX, USA, pp. 3093–3097, Nov. 2004.

366. T. Someya and T. Ohtsuki, “SAGE Algorithm for Channel Estimation and Data Detection with Tracking the Channel Variation in MIMO System,” IEEE Global Telecommunications Conference (GLOBECOM’2004), Dallas, TX, USA, pp. 3651-3655, Nov. 2004.

367. A. Ohashi and T. Ohtsuki, “Performance Analysis and Code Design of Low-Density Parity-Check (LDPC) Coded Space-Time Transmit Diversity (STTD) System,” IEEE Global Telecommunications Conference (GLOBECOM’2004), pp. 3118–3122, Dallas, TX, USA, Nov. 2004.

368. N. Ohkubo and T. Ohtsuki, “Space-Time Trellis Coded OFDM System with Added Pilot Semi-Blind Iterative Channel Estimation,” IEEE Global Telecommunications Conference (GLOBECOM’2004), Dallas, TX, USA, pp. 3546–3550, Nov. 2004.

369. K. Yamasaki and T. Ohtsuki, “Design of Wireless Sensor Networks with Censoring and On-Off Sensors Based on Mutual Information,” IEEE Conference on Sensor and Ad Hoc Communications Networks (SECON2004), Santa Clara, CA, USA, Poster, Oct. 2004.

370. K. Honjo and T. Ohtsuki, “Computational Complexity Reduction of MLD Based on SINR in MIMO Systems,” IEEE Vehicular Technology Conference (VTC2004-Fall), LA, USA, pp. 1426–1430, Sep. 2004.

371. A. Ohashi and T. Ohtsuki, “Performance Analysis of BP-based Algorithms for Irregular Low-Density Parity-Check Codes on Fast Rayleigh Fading Channel,” IEEE Vehicular Technology Conference (VTC2004-Fall), LA, USA, pp. 2530–2534, Sep. 2004.

372. A. Ohashi and T. Ohtsuki, “Regular Low-Density Parity-Check (LDPC) Code with Normalized and UMP BP-based Algorithms on Fast Rayleigh Fading Channel,” IEEE Vehicular Technology Conference (VTC2004-Fall), LA, USA, pp. 2520–2524, Sep. 2004.

373. F. Tsuzuki and T. Ohtsuki, “Channel Estimation with Selective Superimposed Pilot Sequences in Fast Fading Environments,” IEEE Vehicular Technology Conference (VTC2004-Fall), LA, USA, pp. 62–66, Sep. 2004.

374. S. Yoshida and T. Ohtsuki, “Performance Evaluation of Adaptive Internally Turbo Coded Ultra Wideband-Impulse Radio (AITC-UWB-IR) in Multipath Channels,” IEEE Vehicular Technology Conference (VTC2004-Fall), LA, USA, Sep. 2004.

375. O. Takyu, T. Ohtsuki, and M. Nakagawa, “Criterion for Improving Error Rate Degradation by Nonlinear Amplifier for Multicarrier Transmission,” IEEE Vehicular Technology Conference (VTC2004-Fall), LA, USA, pp. 2029-2034, Sep. 2004.

376. Y. Hara, A. Taira, K. Suto, and T. Ohtsuki, “Throughput Enhancement for MIMO-OFDM Systems Using Transmission Control and Adaptive Modulation,” The Second International Symposium on Wireless Personal Multimedia Communications (WPMC’04), Abano Terme, Italy, pp. V1-231–V1-235, Sep. 2004.

377. A. Inoue and T. Ohtsuki, “Performance Factors for Space-Time Trellis Codes in Block FadingChannels,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2004), Barcelona, Spain, pp. 2616–2620, Sep. 2004.

378. O. Takyu, T. Ohtsuki, and M. Nakagawa, “Companding System with Time Clustering,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2004), Barcelona, Spain, pp. 1075–1079, Sep. 2004.

379. K. Wakafuji and T. Ohtsuki, “Performance Analysis of Atmospheric Optical Subcarrier Multiplexing Systems and Atmospheric Optical Code Division Multiplexing Systems,” IEEE Internationalo Conference on Communications (ICC’2004), Paris, France, pp. 3336–3340, June 2004.

380. T. Ezaki and T. Ohtsuki, “Performance Evaluation of Space Hopping Ultra Wideband Impulse Radio (SH-UWB-IR) System,” IEEE International Conference on Communications (ICC’2004), Paris, France, pp. 3591–3595, June 2004.

381. Y. Hara, K. Suto, and T. Ohtsuki, “Throughput Maximization Transmission Control Scheme for MIMO Systems,” Wireless World Research Forum (WWRF11), Oslo, Norway, June 2004.

382. S. Imada and T. Ohtsuki, “Pre-Rake Diversity Combining for UWB Systems in IEEE 802.15 UWB Multipath Channel,” 2004 International Workshop on Ultra Wideband Systems Joint with Conference on Ultra Wideband Systems and Technologies (Joint UWBST$\&$IWUWBS2004), pp. 236–240, Kyoto, Japan, May 2004.

383. Y. Ishiyama and T. Ohtsuki, “Performance Comparison of UWB-IR Using Rake Receivers in UWB Channel Models,” 2004 International Workshop on Ultra Wideband Systems Joint with Conference on Ultra Wideband Systems and Technologies (Joint UWBST$\&$IWUWBS2004), pp. 226–230, Kyoto, Japan, May 2004.

384. T. Ohtsuki, “Space-Time Trellis Coding for UWB-IR,” IEEE Vehicular Technology Conference (VTC2004-Spring), Milan, Italy, pp. 1054–1058, May 2004.

385. Y. Inaba and T. Ohtsuki, “Performance of Low Density Parity Check (LDPC) Codes with Bootstrap Decoding Algorithm on a Fast Fading Channel,” IEEE Vehicular Technology Conference (VTC2004-Spring), pp. 333–337, Milan, Italy, May 2004.

386. H. Kanemaru and T. Ohtsuki, “Interference Cancellation with Diagonalized Maximum Likelihood Decoder for Space-Time/Space-Frequency Block Coded OFDM,” IEEE Vehicular Technology Conference (VTC2004-Spring), Milan, Italy, pp. 525–529, May 2004.

387. K. Suto, Y. Hara, and T. Ohtsuki, “Throughput Maximization Transmission Control Scheme for MIMO systems,” IEEE Vehicular Technology Conference (VTC2004-Spring), Milan, Italy, pp. 603–607, May 2004.

388. H. Yamamoto and T. Ohtsuki, “Atmospheric Optical Subcarrier Modulation Systems Using Space-Time Block Code,” IEEE Global Telecommunications Conference (GLOBECOM’2003), pp. 3326–3330, San Francisco, USA, Dec. 2003.

389. S. Teramoto and T. Ohtsuki, “Multiple-Subcarrier Optical Communication Systems with Peak Reduction Carriers,” IEEE Global Telecommunications Conference (GLOBECOM’2003), pp. 3274–3278, San Francisco, USA, Dec. 2003.

390. K. Wakafuji and T. Ohtsuki, “Direct-detection Optical CDMA Receiver with Interference Estimation and Double Optical Hardlimiters,” IEEE Global Telecommunications Conference (GLOBECOM’2003), pp. 2674–2678, San Francisco, USA, Dec. 2003.

391. N. Ohkubo and T. Ohtsuki, “Added Pilot Semi-Blind Iterative Channel Estimation for OFDM Packet Transmission,” IEEE Global Telecommunications Conference (GLOBECOM’2003), pp. 878–882, San Francisco, USA, Dec. 2003.

392. T. Ezaki and T. Ohtsuki, “Diversity Gain in Ultra Wideband Impulse Radio (UWB-IR),” 2003 IEEE Conference on Ultra Wideband Systems and Technologies (UWBST2003), pp. 56–60, Reston, USA, Nov. 2003.

393. H. Futaki and T. Ohtsuki, “Low-Density Parity-Check (LDPC) Coded MIMO Systems with Iterative Turbo Decoding,” IEEE Vehicular Technology Conference (VTC2003-Fall), pp. 342–346, Orland, USA, Oct. 2003.

394. Y. Sasazaki and T. Ohtsuki, “Improved Design Criteria and New Codes for Space-Frequency Trellis Coding over Frequency Selective Fading Channels,” 2003 IEEE International Symposium on Information Theory (ISIT2003), p. 153, Yokohama, Japan, June, July 2003.

395. Y. Ishiyama and T. Ohtsuki, “Performance Analysis of UWB-IR Systems with Multiple Modulation,” 2003 International Workshop on Ultra Wideband Systems (IWUWBS), 5 pages, Oulu, Finland, June, 2003.

396. O. Takyu, T. Ohtsuki, and M. Nakagawa, “Frequency Offset Compensation with MMSE-MUD for Multi-Carrier CDMA in Quasi-Synchronous Uplink,” IEEE International Conference on Communications (ICC2003), pp.2485 — 2489, Alaska, USA, May 2003.

397. N. Yamamoto and T. Ohtsuki, “Adaptive Internally Turbo-Coded Ultra Wideband-Impulse Radio (AITC-UWB-IR) System,” IEEE International Conference on Communications (ICC2003), pp. 3535 — 3539, Alaska, USA, May 2003.

398. O. Takyu, T. Ohtsuki, and M. Nakagawa “Partial Selected Orthogonal Variable Spreading Factor Code for Peak Power Reduction in Multi-Rate OFCDM Systems,” IEEE Vehicular Technology Conference (VTC2003-Spring), pp. 117 — 121, Cheju, Korea, Apr. 2003.

399. N. Ohkubo and T. Ohtsuki, “Design Criteria for Phase Sequences in Selected Mapping,” IEEE Vehicular Technology Conference (VTC2003-Spring), pp. 373 — 377, Cheju, Korea, Apr. 2003.

400. Y. Sasazaki and T. Ohtsuki, “Improved Design Criteria and New Codes for Space-Frequency Trellis Coding with interleaver over Frequency Selective Fading Channels,” IEEE Vehicular Technology Conference (VTC2003-Spring),  pp. 1358 — 1362, Cheju, Korea, Apr. 2003.

401. A. Ohashi and T. Ohtsuki, “Performance of Low-Density Parity-Check (LDPC) Code with UMP BP-based Algorithm and Quantizer on Rayleigh Fading Channels,” IEEE Vehicular Technology Conference (VTC2003-Spring), pp. 1881 — 1885, Cheju, Korea, Apr. 2003.

402. H. Futaki and T. Ohtsuki, “LDPC-based Space-Time Transmit Diversity Schemes with Multiple Transmit Antennas,” IEEE Vehicular Technology Conference (VTC2003-Spring), pp. 2589 — 2593, Cheju, Korea, Apr. 2003.

403. Y. Sasazaki and T. Ohtsuki, “Improved Design Criteria and New Trellis Codes on Space-Time Trellis Coded Modulation in Fast Fading Channels,” IEEE Global Telecommunications Conference (GLOBECOM’2002), pp. 1103–1107, Taipei, Taiwan, Nov. 2002.

404. S. Teramoto and T. Ohtsuki, “Multiple-Subcarrier Optical Communication Systems with Subcarrier Signal Point Sequence,” IEEE Global Telecommunications Conference (GLOBECOM’2002), pp. 1845–1849, Taipei, Taiwan, Nov. 2002.

405. H. Yamaguchi, T. Ohtsuki, and I. Sasase, “Multiple Subcarrier Modulation for Infrared Wireless Systems Using Punctured Convolutional Codes and Variable Amplitude Block Codes,” IEEE Global Telecommunications Conference (GLOBECOM’2002), pp. 2031–2035, Taipei, Taiwan, Nov. 2002.

406. N. Kitamoto and T. Ohtsuki, “High-Speed Indoor Infrared Wireless Communications Using Line Code and HPF for Home Networking,” International Symposium on Information Theory and Its Applications (ISITA2002), pp. 347–350, Xi’an, China, Oct. 2002.

407. K. Suto and T. Ohtsuki, “Performance Evaluation of Space-Time-Frequency Block Codes over Frequency Selective Fading Channels,” IEEE Vehicular Technology Conference (VTC2002-Fall), pp. 1466–1470, Vancouver, Canada, Sep. 2002.

408. N. Ohkubo and T. Ohtsuki, “A Peak to Average Power Ratio Reduction of Multicarrier CDMA Using Selected Mapping,” IEEE Vehicular Technology Conference (VTC2002-Fall), pp. 2086–2090, Vancouver, Canada, Sep. 2002.

409. Y. Sasazaki and T. Ohtsuki, “Improved Design Criteria and New Codes for Space-Frequency Trellis Coding over Frequency Selective Fading Channels,” IEEE Vehicular Technology Conference (VTC2002-Fall), pp. 2187–2191, Vancouver, Canada, Sep. 2002.

410. N. Yamamoto and T. Ohtsuki, “SOVA-Based Iterative Decoding of Turbo Coded OOK and Turbo Coded BPPM,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2002), pp. 369–373, Lisbon, Portugal, Sep. 2002.

411. N. Kitamoto and T. Ohtsuki, “Parallel Combinatory Multiple-Subcarrier Optical Communication Systems,” IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC2002), pp. 998–1002, Lisbon, Portugal, Sep. 2002.

412. Y. Sasazaki and T. Ohtsuki, “Improvement of design criteria on space-time trellis codes in quasi-static rayleigh fading channels,” 2002 IEEE International Symposium on Information Theory (ISIT2002), p. 247, Lausanne, Switzerland, June, July 2002.

413. H. Futaki and T. Ohtsuki, “Low Density Parity Check (LDPC) Coded OFDM Systems with $M$-PSK Modulation,” IEEE Vehicular Technology Conference (VTC2002-Spring), pp. 1035–1039, Birmingham, Alabama, USA, May 2002.

414. H. Futaki and T. Ohtsuki, “Performance of Low-Density Parity-Check (LDPC) Coded OFDM Systems,” IEEE International Conference on Communications (ICC2002), pp. 1696–1700, New York, USA, April, May 2002.

415. T. Ohtsuki, “Turbo-Coded Atmospheric Optical Communication Systems,” IEEE International Conference on Communications (ICC2002), pp. 2938–2942, New York, USA, April, May 2002.

416. T. Ohtsuki, “Performance Analysis of Atmospheric Optical CDMA Systems,” IEEE International Conference on Communications (ICC2002), pp. 2933–2937, New York, USA, April, May 2002.

417. H. Futaki and T. Ohtsuki, “Effects of Channel Interleaving on Low-Density Parity-Check Coded OFDM Systems over Frequency Selective Fading Channels,” The International Conference on Fundamentals of Electronics, Communications and Computer Sciences, pp. S7-17–S7-21, Tokyo, Mar. 2002.

418. N. Yamamoto and T. Ohtsuki, “Iterative MAP Decoding of Turbo Coded OOK and Turbo Coded BPPM,” IEEE Global Telecommunications Conference (GLOBECOM’2001), pp. 1913–1917, San Antonio, USA, Nov. 2001.

419. H. Futaki and T. Ohtsuki, “Low-Density Parity-Check (LDPC) Coded OFDM Systems,” IEEE Vehicular Technology Conference (VTC2001-Fall), pp. 82–86, Atlantic City, USA, Oct. 2001.

420. H. Yoshimi and T. Ohtsuki, “An OFDM System with Modified Predistorter and MLS,” IEEE Vehicular Technology Conference (VTC2001-Fall), pp. 1677–1681, Atlantic City, USA, Oct. 2001.

421. T. Horiuchi, W. Yang, T. Ohtsuki, and I. Sasase “Performance Evaluation of OFDM with the Compensation Technique of the Nonlinear Distortion using Partial Transmit Sequence and Predistortion,” IEEE Vehicular Technology Conference (VTC2001-Fall), pp. 655–659,Atlantic City, USA, Oct. 2001.

422. A. Mizuki, T. Ohtsuki, and I. Sasase, “Efficient Channel Estimation Scheme and Scattered Pilot Symbol Assignment in OFDM Systems over Mobile Wireless Channels,” Wireless Personal Multimedia Communication 2001 (WPMC2001), pp. 1033–1037, Denmark, Sep. 2001.

423. T. Ohtsuki, “Optical Beam Network Using Turbo Codes,” International Technical Conference on Circuits Systems, Computers and Communications (ITC-CSCC’01), pp. 537–540, Tokushima, July 2001.

424. T. Sonoda, K. Kamakura, T. Ohtsuki, and I. Sasase, “MAI Mitigation by Repetitional Cyclic-Shifted Sequences in Optical CDMA Systems,” International Technical Conference on Circuits Systems, Computers and Communications (ITC-CSCC’01), pp. 522–528, Tokushima, July 2001.

425. R. Matsuo, T. Ohtsuki, and I. Sasase, “Simple EM Based Channel Estimation and Data Detection Using Estimation in the Preceding Frame in Space-Time Coded Signals,” IEEE International Symposium on Information Theory (ISIT2001), p. 222, Washington, D.C., USA, June 2001.

426. R. Matsuo, T. Ohtsuki, and I. Sasase, “Performance Analysis of Indoor Infrared Wireless Systems Using PPM CDMA with Linealizer with dead-zone and PPM CDMA with Hard-Limiter on Diffuse Channels,” IEEE International Conference on Communications (ICC2001), pp. 2016–2020, Helsinki, Finland, June 2001.

427. H. Yamaguchi, R. Matsuo, T. Ohtsuki, and I. Sasase, “Equalization for Infrared Wireless Systems Using OOK-CDMA,” IEEE International Conference on Communications (ICC2001), pp. 170–174, Helsinki, Finland, June 2001.

428. M. Matsuo, T. Ohtsuki, and I. Sasase, “Performance Analysis of DS-CDMA Indoor Infrared Wireless Systems using Equalizer on Diffuse Channels,” IEEE Vehicular Technology Conference (VTC2001-Spring), pp. 1624–1628, Rodes, Greece, May 2001.

429. T. Ohtsuki, T. Kaneko, and J. M. Kahn, “Performance Analysis of Linear Binary Block Coded Optical PPM CDMA Systems with Soft-Decision Decoding,” IEEE Global Telecommunications Conference (GLOBECOM’00), pp. 1196–1200, San Francisco, USA, Nov. 2000.

430. H. Sawagashira, K. Kamakura, T. Ohtsuki, and I. Sasase, “Direct-Detection Optical Synchronous CDMA Systems with Interference Canceller Using Group Information Codes,” IEEE Global Telecommunications Conference (GLOBECOM’00), pp. 1216–1220, San Francisco, USA, Nov. 2000.

431. T. Ohtsuki, H. Yashima, Y. Sanada, and T. Kaneko “Atmospheric Optical CDMA Systems,” International Symposium on Information Theory and Its Applications (ISITA’00), pp. 532–535, Hawaii, USA, Nov. 2000.

432. H. Yamaguchi, R. Matsuo, T. Ohtsuki, and I. Sasase, “Indoor Infrared Wireless Systems Using OOK-CDMA with Decision-Feedback and Decision-Feedforward Equalizer,” International Symposium on Information Theory and Its Applications (ISITA’00), pp. 536–539, Hawaii, USA, Nov. 2000.

433. H. Sawagashira, K. Kamakura, T. Ohtsuki, and I. Sasase, “Performance Analysis of Optical CDMA Systems with Double Optical Hard-Limiters Using Equal-Weight Orthogonal Signaling,”International Symposium on Information Theory and Its Applications (ISITA’00), pp. 540–543, Hawaii, USA, Nov. 2000.

434. T. Sonoda, K. Kamakura, T. Ohtsuki, and I. Sasase, “Performance Analysis of Multibits/Sequence-Period Optical Frequency-Encoded CDMA System Using Time-Encoding,” International Symposium on Information Theory and Its Applications (ISITA’00), pp. 552–555, Hawaii, USA, Nov. 2000.

435. T. Yamazaki, Y. Sanada, H. Yashima, and T. Ohtsuki, “Performance of Coded Multicarrier Modulation on a Correlated Multipath Fading Channel Using a Gilbert Model,” 2000 IEEE International Symposium on IntelligentSignal Processing and Communication Systems (ISPACS 2000), pp. 555–560, Hawaii, USA, Nov. 2000.

436. T. Ohtsuki and T. Kaneko, “Transfer Function Bounds on Performance of Turbo-Coded $M$-ary Pulse Position Modulation,” 2nd International Symposium on Turbo Codes $\&$ Related Topics, pp. 491–494, Brest, France, Sep. 2000.

437. T. Ohtsuki and J. M. Kahn, “Transfer Function Bounds on Performance of Binary Turbo Coding Followed by M-ary Orthogonal Signal Mapping Through Interleaver,” IEEE International Conference on Communications (ICC2000), pp. 623–627, New Orleans, USA, June 2000.

438. T. Ohtsuki and J. M. Kahn, “Turbo-Coded Optical PPM CDMA Systems,” IEEE International Conference on Communications (ICC2000), pp. 939–943, New Orleans, USA, June 2000.

439. T. Ohtsuki and J. M. Kahn, “Performance of Turbo Codes With Two-Branch Receive Diversity and Correlated Fading,” IEEE Vehicular Technology Conference (VTC2000-Spring), pp. 1026–1030, Tokyo, Japan, May 2000.

440. A. Sato, T. Ohtsuki, and I. Sasase, “Effects of Shadowing on Non-Directed LOS Indoor Infrared Systems With Site Diversity,” IEEE Vehicular Technology Conference (VTC2000-Spring), pp. 1550–1554, Tokyo, Japan, May 2000.

441. T. Ohtsuki and J. M. Kahn, “Transfer Function Bounds on Performance of Turbo Codes for M-ary Orthogonal Signals,” IEEE Global Telecommunications Conference (GLOBECOM’99), pp. 515–519, Rio de Janeiro, Brazil, Dec. 1999.

442. T. Ohtsuki, “Performance Analysis of Direct-Detection Optical CDMA Systems With Optical Hard-Limiter Using Equal-Weight Orthogonal Signaling,” IEEE Global Telecommunications Conference (GLOBECOM’99), pp. 696–700, Rio de Janeiro, Brazil, Dec. 1999.

443. H. Shingu, K. Kamakura, T. Ohtsuki, and I. Sasase, “Optical Code Division Multiple Access System Using Interference Canceller With Optical Clipper,” IEEE Malaysia International Conference on Communications (MICC’99), pp. 115–120, Malacca, Malaysia, Nov. 1999.

444. T. Yamazaki, Y. Sanada, H. Yashima, T. Ohtsuki, T. Morohashi, and K. Araki, “Performance of Coded Multicarrier Modulation on a Gilbert Channel,” The Second International Symposium on Wireless Personal Multimedia Communications (WPMC’99), pp. 277–281, Netherlands, Sep. 1999.

445. R. Matsuo, M. Matsuo, T. Ohtsuki, T. Udagawa, and I. Sasase, “Performance Analysis of Indoor Infrared Wireless Systems Using OOK CDMA on Diffuse Channels,” 1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, pp. 30–33, Victoria, Canada, Aug. 1999.

446. T. Sonoda, K. Kamakura, T. Ohtsuki, I. Sasase, and S. Mori, “Optical Spread Time CDMA Systems Combined with Time Domain OOC Encoding,” 1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, pp. 34–37, Victoria, Canada, Aug. 1999.

447. W. Yang, T. Ohtsuki, M. Ueda, K. Matsumoto, and I. Sasase, “Performance Analysis of ADSL With Repetition Scheme Under Crosstalk Noise from ISDN,” International Conference on Telecommunications (ICT’99), pp. 462–466, Cheju, Korea, June 1999.

448. T. Ohtsuki, “Rate Adaptive Indoor Infrared Wireless Communication Systems Using Repeated and Punctured Convolutional Codes,” IEEE International Conference on Communications (ICC’99), pp. 609–613, Vancouver, Canada, June 1999.

449. T. Ohtsuki, “Rate Adaptive Transmission Scheme Using Punctured Convolutional Codes in a Fixed Channel Reuse Strategy with PPM CDMA,” IEEE Global Telecommunications Conference (GLOBECOM’98), pp. 207–212, Sydney, Australia, Nov. 1998.

450. K. Kamakura, T. Ohtsuki, and I. Sasase, “ATM-Based on Optical CDMA Transport Network Using Coherent Ultrashort Pulse,” IEEE Global Telecommunications Conference (GLOBECOM’98), pp. 3215–3220, Sydney, Australia, Nov. 1998.

451. T. Ohtsuki, “Performance of Multicode Direct-Detection Optical CDMA Systems,” IEEE Global Telecommunications Conference (GLOBECOM’98), pp. 3227–3232, Sydney, Australia, Nov. 1998.

452. T. Ohtsuki, “Direct-Detection Optical Asynchronous CDMA Systems with Double Optical Hard-Limiters: APD Noise and Thermal Noise,” IEEE Global Telecommunications Conference (GLOBECOM’98), pp. 3233–3238, Sydney, Australia, Nov. 1998.

453. W. Yang, T. Ohtsuki, M. Ueda, K. Matsumoto, and I. Sasase, “Performance Analysis of ADSL With Punctured Convolutional Code,” International Symposium on Information Theory and Its Applications (ISITA’98), pp. 56–59, Mexico City, Mexico, Oct. 1998.

454. T. Ohtsuki, “Performance Analysis of Indoor Infrared Wireless PPM CDMA Systems on Hybrid LOS Channels,” International Symposium on Information Theory and Its Applications (ISITA’98), pp. 146–149, Mexico City, Mexico, Oct. 1998.

455. H. Shingu, Y. Gamachi, T. Ohtsuki, and I. Sasase, “Optical Code Division Multiplex System with Multi-Pulse Mapping,” International Symposium on Information Theory and Its Applications (ISITA’98), pp. 522–525, Mexico City, Mexico, Oct. 1998.

456. M. Matsuo, T. Ohtsuki, and I. Sasase, “Rate-Adaptive Indoor Infrared Wireless Communication Systems Using Punctured Convolutional Codes and Adaptive PPM,” IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC’98), pp. 693–697, Boston, USA, Sep. 1998.

457. K. Kamakura, T. Ohtsuki, H. Uehara, Y. Gamachi, and I. Sasase, “Optical Spread Time CDMA Communications System with PPM Signaling,” IEEE International Symposium on Information Theory (ISIT’98), p. 258, Cambridge, MA, USA, Aug. 1998.

458. T. Ohtsuki, “Cutoff Rate Performance for Space Diversity Systems in Rayleigh Fading Channels Without CSI,” IEEE International Conference on Universal Personal Communications (ICUPC’97), pp. 396–400, San Diego, USA, Oct. 1997.

459. T. Ohtsuki, “Viterbi Decoding Differential Detection With Space Diversity for 16DAPSK on Rayleigh Fading Channels,” IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC’97), pp. 949–953, Helsinki, Finland, Sep. 1997.

460. S. Nanao, H. Yashima, J. Suzuki, and T. Ohtsuki, “Optical PPM-CDMA Systems Using EWOC,” IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, pp. 14–17, Victoria, CANADA, Aug. 1997.

461. T. Ohtsuki, “Performance of Direct-Detection Optical CDMA Systems with Double Optical Hard-Limiters and Avalanche Photodiode,” International Technical Conference on Circuits Systems, Computers and Communications (ITC-CSCC’97), pp. 11–14, Okinawa, July 1997.

462. T. Ohtsuki, “Cutoff Rate Performance for Space Diversity Systems in a Correlated Rayleigh Fading Channel With CSI,” IEEE International Symposium on Information Theory (ISIT’97), p. 238, Ulm, Germany, June-July 1997.

463. T. Ohtsuki, “Multicode Direct-Detection Optical CDMA Systems,” IEEE International Symposium on Information Theory (ISIT’97), p. 479, Ulm, Germany, June-July 1997.

464. T. Nishioka, H. Yashima, J. Suzuki, and T. Ohtsuki, “PPM Multibits/Sequence-Period Optical Orthogonal CDMA Systems,” IEEE International Symposium on Information Theory (ISIT’97), p. 482, Ulm, Germany, June-July 1997.

465. T. Ohtsuki, “Channel Interference Cancellation Using Electrooptic Switch and Optical Hard-Limiters for Direct-Detection Optical CDMA Systems,” IEEE International Conference on Communications (ICC’97), pp. 106–110, Montreal, Canada, June 1997.

466. T. Ohtsuki, “Performance Analysis of Direct-Detection Optical Asynchronous CDMA Systems With Double Optical Hard-Limiters,” IEEE International Conference on Communications (ICC’97), pp. 121–125, Montreal, Canada, June 1997.

467. Y. Gamachi, H. Uehara, T. Ohtsuki, and I. Sasase, “Upper Bound of Optical Synchronous PPM/CDMA Systems With Interference Canceller Using Reference Signal,” International Conference on Telecommunications (ICT’97), pp. 909–914, Melbourne, Australia, Apr. 1997.

468. M. Asano, T. Ohtsuki, H. Uehara, and I. Sasase, “A Novel Frame Synchronization Rule for Optical DPPM Systems With the Restriction of The Frame Length,” IEEE Global Telecommunications Conference (GLOBECOM’96), pp. 923–927, London, UK, Nov. 1996.

469. T. Ohtsuki, “Optical CDMA Canceller Systems With Tunable Prime Code Decoder,” International Symposium on Information Theory and Its Applications (ISITA’96), pp. 766–769, Victoria, Canada, Sep. 1996.

470. T. Ohtsuki, “Channel Interference Cancellation Using Time Division Reference Signal for Direct-Detection Optical Synchronous CDMA Systems,” IEEE International Conference on Communications (ICC’96), pp. 187–191, Dallas, USA, June 1996.

471. M. Asano, T. Ohtsuki, H. Uehara, and I. Sasase, “Frame Synchronization for Optical Differential Pulse-Position Modulation (DPPM) Systems,” International Symposium on Communications, pp. 581–586, Taiwan, Dec. 1995.

472. T. Ohtsuki, K. Sato, I. Sasase, and S. Mori, “Direct-Detection Optical Synchronous CDMA Systems With Double Optical Hard-Limiters Using Modified Prime Sequence Codes,” IEEE Global Telecommunications Conference (GLOBECOM’95), pp. 2156–2160, Singapore, Nov. 1995.

473. Y. Gamachi, T. Ohtsuki, H. Uehara, and I. Sasase, “Optical Synchronous PPM/CDMA Systems Using Co-channel Interference Cancellation,” IEEE Global Telecommunications Conference (GLOBECOM’95), pp. 2161–2165, Singapore, Nov. 1995.

474. T. Ohtsuki, I. Sasase, and S. Mori, “Tight Lower Bounds on Capacity and Cutoff Rate of DOPPM in Optical Direct-Detection Channel,” IEEE International Symposium of Information Theory (ISIT’95), p. 478, Whistler, Canada, Sep. 1995.

475. T. Ohtsuki, I. Sasase, and S. Mori, “Effects of Hard-Limiter and Error Correction Coding on Performance of Direct-Detection Optical CDMA Systems With PPM Signaling,” IEEE International Conference on Communications (ICC’95), pp. 1307–1311, Seattle, USA, June 1995.

476. K. Sato, T. Ohtsuki, H. Uehara, and I. Sasase, “Performance of Optical Direct-Detection CDMA Systems Using Prime Sequence Codes,” IEEE International Conference on Communications (ICC’95), pp. 1312–1316, Seattle, USA, June 1995.

477. H. Uehara, T. Ohtsuki, and I. Sasase, “Performance Analysis of Coherent Optical POLSK Receivers With Local Oscillator Intensity Noise and Unmatched Quantum Efficiencies,” International Conference on Telecommunications, pp. 316–319, Bali, Indonesia, April 1995.

478. T. Ohtsuki, I. Sasase, and S. Mori, “Access Timing Controlled Direct-Detection Optical CDMA Systems With PPM Signaling,” International Symposium on Information Theory \& Its Applications 1994 (ISITA’94), pp. 355–359, Sydney, Australia, Nov. 1994.

479. K. Sato, T. Ohtsuki, H. Uehara, and I. Sasase, “Effect of Imperfect Slot Synchronization on Direct-Detection Optical Synchronous CDMA Communication Systems With PPM Signaling,” International Symposium on Information Theory \& Its Applications 1994 (ISITA’94), pp. 367–371, Sydney, Australia, Nov. 1994.

480. N. Aoki, T. Ohtsuki, and I. Sasase, “Performance Analysis of Multi-Pulse Pulse Position Modulation using Avalanche Photodiode in Optical Intersatellite Links,” International Symposium on Information Theory \& Its Applications 1994 (ISITA’94), pp. 1257–1261, Sydney, Australia, Nov. 1994.

481. T. Ohtsuki, I. Sasase, and S. Mori, “Performance Analysis of Overlapping Multi-pulse Pulse Position Modulation (OMPPM) in Noisy Photon Counting Channel,” IEEE International Symposium of Information Theory (ISIT’94), p. 80, Trondheim, Norway, June-July 1994.

482. T. Ohtsuki, I. Sasase, and S. Mori, “Trellis Coded Overlapping Multi-pulse Pulse Position Modulation in Optical Direct-Detection Channel,” IEEE International Conference on Communications (ICC’94), pp. 675–679, New Orleans, U.S.A., May 1994.

483. T. Ohtsuki, I. Sasase, and S. Mori, “Differential Overlapping Pulse Position Modulation in Optical Direct-Detection Channel,” IEEE International Conference on Communications (ICC’94), pp. 680–684, New Orleans, U.S.A., May 1994.

484. K. Sato,T. Ohtsuki, and I. Sasase, “Performance of Coded Multi-pulse PPM With Imperfect Slot Synchronization in Optical Direct-Detection Channel,” IEEE International Conference on Communications (ICC’94), pp. 121–125, New Orleans, U.S.A., May 1994.

485. T. Ohtsuki, I. Sasase, and S. Mori, “Coherent Subcarrier Multiplexed System Using an Orthogonal Polarization State as a Pilot Signal in the Presence of Second- and Third-order Intermodulation Distortions,” 1993 International Symposium on Nonlinear Theory and its Applications (NOLTA’93), pp. 883–886, Hawaii, U.S.A., Dec. 1993.

486. H. Uehara, I. Seto, T. Ohtsuki, I. Sasase, and S. Mori, “Impact of Local Oscillator Intensity Noise in Coherent Optical POLSK Heterodyne/Homodyne Receivers,” IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, pp.757–760, Victoria, CANADA, May 1993.

487. T. Ohtsuki, I. Sasase, and S. Mori, “Overlapping Multi-pulse Pulse Position Modulation in Optical Direct-Detection Channel,” IEEE International Conference on Communications (ICC’93), pp. 1123–1127, Geneva, Switzerland, May 1993.

488. K. Sato, T. Ohtsuki, I. Sasase, and S. Mori, “Performance Analysis of (m,2) MPPM With Imperfect Slot Synchronization,” IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, pp.765–768, Victoria, CANADA, May 1993.

489. T. Ohtsuki, I. Sasase, and S. Mori, “Performance Analysis of MPPM in Noisy Photon Counting Channel,” IEEE International Symposium on Information Theory (ISIT’93), p.167, San Antonio, Texas, U.S.A., Jan. 1993.

490. T. Ohtsuki, I. Sasase, and S. Mori, “Reed-Solomon Coded FSK SCM System With Distributing LO in Local Loop in the Presence of Laser Phase Noise,” International Conference on Communications Systems/ International Symposium on Information Theory and Its Application (ICCS/ISITA’92), pp. 1033–1037, Singapore, Nov. 1992.

491. H. Uehara, I. Seto, T. Ohtsuki, I. Sasase, and S. Mori, “Phase Noise Insensitive Multilevel POLSK Based on QAM Mapping in Coherent Optical Systems,” International Conference on Communications Systems/ International Symposium on Information Theory and Its Application (ICCS/ISITA’92), pp. 1043–1047, Singapore, Nov. 1992.

492. T. Ohtsuki, H. Yashima, I. Sasase, and S. Mori, “Coherent Subcarrier Multiplexing System With Distributing Local Oscillator in Local Loop,” IEEE International Conference on Communications (ICC’92), pp. 1159–1162, U.S.A., June 1992.

493. I. Seto, T. Ohtsuki, H. Yashima, I. Sasase, and S. Mori, “Polarization State and Phase Noise Insensitive POLSK Phase-Diversity Homodyne System in Coherent Optical Communications,” IEEE International Conference on Communications (ICC’92), pp. 743–747, U.S.A., June 1992.

494. T. Ohtsuki, H. Yashima, I. Sasase, and S. Mori, “Parallel Rate-Variable Punctured Convolutional Coded PPM in Photon Communication” IEEE Global Telecommunications Conference (GLOBECOM’91), pp.439–443, Phoenix, Arizona, U.S.A., Dec. 1991.

495. I. Seto, T. Ohtsuki, H. Yashima, I. Sasase, and S. Mori, “Coherent Optical Polarization-Shift-Keying (POLSK) Homodyne System Using Phase-Diversity Receivers,” IEEE Global Telecommunications Conference (GLOBECOM’91), pp.1601–1605, Phoenix, Arizona, U.S.A., Dec. 1991.

496. T. Ohtsuki, H. Yashima, I. Sasase, and S. Mori, “Cutoff Rate and Capacity of MPPM in Noiseless Photon Counting Channel,” IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, pp.99–102, Victoria, CANADA, May 1991.

497. T. Ohtsuki, H. Yashima, I. Sasase, and S. Mori, “Punctured Convolutional Coded PPM in Optical Channel,” International Symposium on Information Theory and Its Applications (ISITA’90), pp.335–338, Hawaii, U.S.A., Nov. 1990.