研究業績/国際会議

  1. Hayato Mukasa, Koshiro Aruga, Takeo Fujii, Koichi Adachi, “Indoor Wireless Environment Visualization for Smart Factories,” in Proc. ICOIN 2024, Ho Chi Minh City, Vietnam, January 2024.
  2. Keisuke Kikuchi, Takeo Fujii, “A Study of Communication Quality Estimation Methods for LTE Using Communication Indexces Considering Time Variability,” in Proc. ICOIN 2024, Ho Chi Minh City, Vietnam, January 2024.
  3. Shugo Hirano, Hirofumi Nakajo, Takeo Fujii, “User Pairing Method using Radio Map for Spectrum Sharing between Non-Terrestrial Networks and Terrestrial Networks,” in Proc. WPMC2023, Florida, USA, Nov. 2023.
  4. Ryogo Oya, Shinichiro Kakuda, Takeo Fujii, Osamu Takyu, Mai Ohta, Koichi Adachi, “Packet-Level Index Modulation under Duty Cycle Constraints,” in Proc. WPMC2023, Florida, USA, Nov. 2023.
  5. Keigo Saito, Takeo Fujii, Koji Ishibashi, Yu Shibata, Soma Toki, Hideki Endo, “Packet Aggregation Utilizing Multi-Antenna Beamforming in IRDT Protocol,” in Proc. VTC2023-Fall, Hong Kong, China, October 2023.
  6. Shota Yamada, Takeo Fujii, Katsuya Suto and Koya Sato, “Observation Data and 3D Map-Based Radio Environment Estimation for Drone Wireless Communications,” in Proc. ICUFN 2023, Paris, France, July 2023.
  7. Hayato Mukasa and Takeo Fujii, “Hidden Node Recognition Utilizing Wireless LAN Sensing Data in Indoor Environments “, in Proc. ICUFN 2023, Paris, France, July 2023.
  8. Katsuya Suto, Shinsuke Bannai, Koya Sato and Takeo Fujii, “Propagation Graph Representation Learning and Its Implementation in Direct Path Represent,” in Proc. IEEE WCNC 2023, Glasgow, UK, March 2023.
  9. Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii, “Resource Allocation for Periodic Traffic in Wireless Sensor Network,” in Proc. IEEE WCNC 2023, Glasgow, UK, March 2023.
  10. Hirofumi Nakajo, Yusuke Itayama, Shougo Matsuo and Takeo Fujii, “5D Spectrum Database,” in Proc. ICAIIC 2023, Bali, Indonesia, Feb. 2023.
  11. Sunao Miyamoto, Shota Yamada and Takeo Fujii, “Height Pattern Estimation Method Using the Combination of Radio Map and 3D Map for Spectrum Sharing,” in Proc. ICOIN 2023, Bangkok, Thailand, Jan. 2023.
  12. Shougo Matsuo, Sunao Miyamoto, Hirofumi Nakajo and Takeo Fujii, “Beam Pattern Estimation of 5G Millimeter-Wave Base Station Based on Radio Map and Multi-Beam Antenna Model at 28GHz,” in Proc. ICOIN 2023, Bangkok, Thailand, Jan. 2023.
  13. Taro Miyamoto, Shusuke Narieda, Takeo Fujii, Hiroshi Naruse, “Measurement of Sub-GHz Band LPWA Radiowave Propagation on Each Floor in Indoor Environment,” in Proc. ICOIN 2023, Bangkok, Thailand, Jan. 2023.
  14. Daisuke Kumamoto, Shusuke Narieda, Takeo Fujii, Hiroshi Naruse, “Lower Bound for the Number of Accommodable End-Devices in LPWAN with Multiple Interferences,” in Proc. ICOIN 2023, Bangkok, Thailand, Jan. 2023.
  15. Yusuke Itayama, Hirofumi Nakajo, Shougo Matsuo and Takeo Fujii, “Measurement-Based Spectrum Database for Non-Terrestrial Networks,” in Proc. ICOIN 2023, Bangkok, Thailand, Jan. 2023.
  16. Shusuke Narieda, Takeo Fujii, “Robustness to Digital Power Adjustment in Transmit Power Allocation for Poor Conditioned LPWA End Devices,” in Proc. ICOIN 2023, Bangkok, Thailand, Jan. 2023.
  17. Shinichiro Kakuda, Takeo Fujii, and Shusuke Narieda, “Successive Interference Cancellation for Signal Demodulation of Multiple LPWA Systems,” in Proc. APSIPA ASC 2022, Thailand, Chiang Mai, Nov. 2022.
  18. Natsuki Miyoshi, Tomoyuki Kawashima, Shusuke Narieda, Takeo Fujii, Hiroshi Naruse, “Measurement of sub-GHz Band LPWA Propagation at Half-Wavelength Intervals,” in Proc. IEEE Future Networks World Forum 2022, pp.429-433, Oct. 2022.
  19. Ying GAO and Takeo Fujii, “Kriging-based Trust Nodes Aided REM Construction under Threatening Environment,” in Proc. IEEE VTC2022-Fall, London, UK, Spet. 2022.
  20. Hirofumi Nakajo and Takeo Fujii, “Blockage Prediction for Millimeter-wave Communications Based on People Flow Data,” in Proc. IEEE VTC2022-Fall, London, UK, Spet. 2022.
  21. Ayumu Ueda, Takeo Fujii and Atsuki Mukoda, “Adaptive Communication System Selection Method for V2X Using Radio Environment Database,” in Proc. ITS World Congress 2022, Los Angeles, USA, Spet. 2022.
  22. Atsuki Mukoda, Ayumu Ueda, Keita Katagiri and Takeo Fujii, “Constructing Packet Delivery Rate-based Map Using Confidence Interval,” in Proc. ITS World Congress 2022, Los Angeles, USA, Spet. 2022.
  23. Mai Ohta, Takeo Fujii, “Differential Packet Level Index Modulation for Low Power Wide Area System,” in Proc. ICUFN 2022, Barcelona, Spain, July 2022.
  24. Noriyuki Oki, Atsuki Mukoda, Ayumu Ueda and Takeo Fujii, “Device Adaptive Control Method Considering Power
    Consumption for Pedestrian-to-Infrastructure Communications,” in Proc. ICUFN 2022, Barcelona, Spain, July 2022.
  25. Ryo Miyamoto, Shunsuke Narieda, Takeo Fujii and Hiroshi Naruse, “Characteristics of RSSI Kriging Interpolated Value in Neighborhood of Buildings,” in Proc. ICUFN 2022, Barcelona, Spain, July 2022.
  26. Ryuji Miyamoto, Osamu Takyu, Hiroshi Fujiwara, Koichi Adachi, Mai Ohta and Takeo Fujii, “Performance Evaluation of Highly Efficient Information Collection Methods by Trend Analysis of Sensor Information Using Pre-Learning,” in Proc. ICUFN 2022, Barcelona, Spain, July 2022.
  27. Toshi Ito, Osamu Takyu, Mai Ohta, Takeo Fujii and Koichi Adachi, “High-Sensitivity Detection Method for Signals in PhyC-SN,” in Proc. ICUFN 2022, Barcelona, Spain, July 2022.
  28. Shunsuke Narieda and Takeo Fujii, “Characteristics of Transmit Power Allocation for Poor Conditioned End Devices in LPWAN with Peak Detection Based Carrier Sense,” in Proc. ICUFN 2022, Barcelona, Spain, July 2022.
  29. Ying Gao, Takeo Fujii, “Terminal Selection Based on Multi-armed Bandit under Threatening Environment for Radio Environment Map Construction,” in Proc. IEEE VTC2022-Spring, Online, pp. 1-6, June 2022.
  30. Keita Katagiri and Takeo Fujii, “Classification and discretization of shadowing toward low storage radio map,” in Proc. ICAIIC 2022, online, Feb. 2022.
  31. Satoshi Nakaniida and Takeo Fujii, “Throughput prediction by radio environment correlation recognition using crowd sensing and federated learning,” in Proc. ICAIIC 2022, online, Feb. 2022.
  32. Tetsuki Taniguchi, Takeo Fujii, “Power Control in Local 5G/Beyond Systems Utilizing Spectrum Database and Monte Carlo Stochastic Programming,” 2022 IEEE 12th Annual Computing and Communication Workshop and Conference (CCWC), pp. 1098-1104, Jan. 2022.
  33. Keita Katagiri and Takeo Fujii, “Partitioned Path Loss Models Based on Coefficient of Determination,” in Proc. ICOIN 2022, Online, Jan. 2022.
  34. Shougo Matsuo, Sunao Miyamoto, Keita Katagiri and Takeo Fujii,“Radio Propagation Extrapolation by Using Multiple Separated Propagation Paths Estimated by Radio Map,” in Proc. ICOIN 2022, Online, Jan. 2022.
  35. Mai Ohta, Takeo Fujii, “Intra-System Interference Avoidance for Packet-Level Index Modulation in Internet of Things,” in Proc. APSIPA-ASC 2021, Tokyo, Japan, Dec. 2021.
  36. Keita Katagiri and Takeo Fujii, “Low storage radio map using statistical inference,” in Proc. IEEE DySPAN2021, Online, Dec. 2021.
  37. Keita Katagiri, Koya Sato, and Takeo Fujii, “Empirical CDF-based power control method for obstructed V2V communications,” in Proc. ICETC2021, Online, Dec. 2021.
  38. Keita Katagiri, Koya Sato, and Takeo Fujii, “Estimation of the Number of Obstacles Based on p-value for V2V Communications,” in Proc. ICETC2021, Online, Dec. 2021.
  39. Shinichiro Kakuda, Yudai Yamazaki, Keita Katagiri, Takeo Fujii, Osamu Takyu, Mai Ohta, Koichi Adachi, “Channel allocation for LoRaWAN considering intra-system and inter-system interferences,” in Proc. IEEE VTC2021-Fall, Online, pp. 1–7, Sept. 2021,
  40. Ying Gao, Takeo Fujii, “Improvement of Radio Environment Map under Data Falsification Attack,”Proc. in Proc. IEEE VTC2021-Fall, Online, pp. 1-5, Sept. 2021.
  41. Hirofumi Nakajo and Takeo Fujii, “Local 5G mmWave Signal Measurement and Analysis for Spectrum Database,” in Proc. ICUFN 2021, online, Aug. 2021.
  42. Gaku Kobayashi, Osamu Takyu, Koichi Adachi,Mai Ohta, Takeo Fujii, “Proposal of Interference Power Occupancy Estimation Method Using Chirp Demodulation,” in Proc. ICUFN 2021, online, Aug. 2021.
  43. Keita Katagiri and Takeo Fujii, “Mesh-clustering-based radio maps construction for autonomous distributed networks,” in Proc. ICUFN 2021, online, Aug. 2021.
  44. Haesik Kim, Takeo Fujii, Kenta Umebayashi, “Relay Nodes Selection Using Reinforcement Learning,” in Proc. ICAIIC 2021, online, April 2021.
  45. Muying Chen, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii, “Transmission Timing Control Using ACK Signal in LoRaWAN,” in Proc. WCNC 2021, online, April 2021.
  46. Soraya Mitate, Yudai Yamazaki, Takeo Fujii and Shusuke Narieda, “Wireless System Selection with Spectrum Database for IoT,” Proc. ICOIN 2021, pp. 203-208, Online, Jan. 2021.
  47. Kohei Natsume, Mai Ohta, Koichi Adachi, Osamu Takyu and Takeo Fujii, “DCT Compression Scheme forWireless Sensor Information considering Spatial Correlation,” Proc. ICOIN 2021, Online, Jan. 2021.
  48. Yudai Yamazaki and Takeo Fujii, “Scheduling Algorithm Considering Interference Interval for LPWA,” Proc. APSIPA ASC 2020, Online, Dec. 2020.
  49. Taiki Matsushima, Takeo Fujii “Compensation Method of Received Signal Power observed by Smartphone for Crowdsensed Spectrum Database,” APSIPA-ASC 2020, Virtual Conference, Dec. 2020.
  50. Aoto Kaburaki, Kouichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii,”Autonomous Decentralized Transmission Timing Control in Wireless Sensor Network,” APSIPA-ASC 2020, Virtual Conference, Dec. 2020.
  51. Gaku Kobayashi, Osamu Takyu, Kouichi Adachi, Mai Ohta, Takeo Fujii, “Estimation of Desired power and Undesired power Using Chirp Demodulation and Evaluation of Accuracy,” APSIPA-ASC 2020, Virtual Conference, Dec. 2020.
  52. Tetsuki Taniguchi, Takeo Fujii, “Utilization of Spectrum Database for Power Control in Micro Operator Based Small Cell System by Two-Stage Stochastic Design,” ISSPIT2020, Virtual Conference, Dec. 2020.
  53. Tetsuki Taniguchi, Takeo Fujii, “Interference Management of Small Cell System for Micro Operator Using Spectrum Database and Multiobjective Evolutionary Algorithm under Stochastic Constraint,” ICETC2020, Virtual Conference, Dec. 2020.
  54. Ayumi Kaichi, Shusuke Narieda, Takeo Fujii, Kenta Umebayashi, Hiroshi Naruse, “On Placement of End Devices in LPWAN Based WSN for Environmental Monitoring Applications,” in Proc. APSIP-ASC 2020, Online, Dec. 2020.
  55. Syunsuke Nakano, Kei Inage, and Takeo Fujii,”Primary user detection under superposed TD-LTE signal using multiple reference signals,”ICETC2020, Virtual Conference, Dec. 2020.
  56. Sunao Miyamoto, Keita Katagiri, Koya Sato, Koichi Adachi, and Takeo Fujii, “Highly accurate prediction of radio propagation based on compensation of clutter loss for spectrum sharing,”ICETC2020, Virtual Conference, Dec. 2020.
  57. Tetsuki Taniguchi, Takeo Fujii, “Interference Management with Beamforming Utilizing Spectrum Database for Micro Operators, “ VTC2020-Fall, Virtual Conference, Nov. 2020.
  58. Hiroki Ito, Takeo Fujii, and Yasushi Yamao, “Post-Reception Compensation Performance of Blind Nonlinear Compensator with Equalizer against Memory Nonlinear Distortion,” Proc. IEEE VTC2020-Fall, Virtual Conference, Nov. 2020.
  59. Keita Katagiri, Koya Sato, Kei Inage, and Takeo Fujii, “Experimental Verification of Shadowing Classification for Radio Map,” Proc. IEEE VTC2020-Fall, Virtual Conference, Nov. 2020.
  60. Cong-Hoang Diem, Takeo Fujii, “An UAV and distributed STBC for wireless relay networks in search and rescue operations,” EAI INISCOM 2020, Virtual conference, Aug. 2020.
  61. Keita Katagiri and Takeo Fujii, “Radio Environment Map Updating Procedure considering Change of Surrounding Environment,” Proc. IEEE WCNC Workshop on Smart Spectrum (IWSS 2020), Virtual Conference, May 2020.
  62. Takeo Fujii, “Dynamic spectrum sharing based on spectrum database for 5G and beyond,” 2020 Japan and Finland Joint Workshop on Emerging Technologies in 5G and Beyond, Oulu, Finland, Feb. 2020.
  63. Yuki Hatada and Takeo Fujii, “Receiver beacon transmission interval design using Q-Learning focused on packet delivery rate for multi-stage wireless sensor network,” Proc. ICAIIC2020, Fukuoka, Japan, Feb. 2020.
  64. Koya Sato, Kei Inage, and Takeo Fujii, “Radio Environment map construction with joint space-frequency interpolation,” Proc. ICAIIC2020, Fukuoka, Japan, Feb. 2020.
  65. Keita Katagiri and Takeo Fujii, “Measurement-based Spectrum Database for Wireless Distributed Networks Using Shadowing Classifier, ” Proc. ICAIIC2020, Fukuoka, Japan, Feb. 2020.
  66. Toshiki Nonaka, Mai Ohta, Osamu Takyu and Takeo Fujii, “Adapting the Number of Replicas in the E-IRSA System Using the Power Control,” Proc. ICOIN2020, Jan. 2020.
  67. Kohei Natsume, Mai Ohta, Osamu Takyu and Takeo Fujii, “Data Fusion Method Exploiting Data Correlation for Physical Wireless Parameter Conversion Sensor Networks,” ICOIN2020, Barcelona, Spain, Jan. 2020.
  68. Shusuke Narieda, Takeo Fujii, Kenta Umebayashi, “On power consumption of end device in LoRa networks with listen before talk,” ICOIN2020, Barcelona, Spain, Jan. 2020.
  69. Akinori Kamio, Fumihito Sasamori, Handa Shiro, Osamu Takyu, Mai Ohta, Takeo Fujii, “Recognition and countermeasure to hidden terminal problem by packet analysis in wireless LAN,” APSIPA ASC 2019, Lanzhou, China, Nov. 2019.
  70. Yuki Hatada and Takeo Fujii, “Receiver Beacon Transmission Interval Design Using Machine Learning for Multi-Stage Wireless Sensor Networks,” Proc. SmartCom 2019, Nov. 2019.
  71. Hirofumi Nakajo and Takeo Fujii, “Adaptive Band and Power Control for Spectrum Shared Mobile Systems,” Proc. SmartCom 2019, Nov. 2019.
  72. Fumiya Aizawa and Takeo Fujii, “A Study of Hidden Node Discrimination Method using Wireless LAN Packets,” Proc. SmartCom 2019, Nov. 2019.
  73. Akinori Kamio, Osamu Takyu, Takeo Fujii, Mai Ohta, “Channel Assignment and Differential Data Transmission in Physical Wireless Parameter Conversion Sensor Network,” SmartCom 2019, New Jersey, USA, Nov. 2019.
  74. Yuki Nishio, Osamu Takyu, Hayato Soya, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa, “Performance evaluation of rendezvous channel by e-greedy method with learning type occupancy under misdetection,” SmartCom 2019, New Jersey, USA, Nov. 2019.
  75. Ryota Sugimoto, Osamu Takyu, Koichi Adachi, Mai Ohta, Takeo Fujii, “Evaluation of radio propagation characteristics with Various Antenna High for 920MHz frequency sharing,” SmartCom 2019, New Jersey, USA, Nov. 2019.
  76. Naoki Aihara, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii, “Reinforcement learning aided orthogonal frequency allocation in LoRaWAN” SmartCom 2019, New Jersey, USA, Nov. 2019.
  77. Keita Katagiri and Takeo Fujii, “Demo: Highly accurate prediction of radio environment for V2V communications”, Proc. IEEE DySPAN 2019, Nov. 2019.
  78. Keita Katagiri and Takeo Fujii, “Radio environment map updating procedure based on hypothesis testing”, Proc. IEEE DySPAN 2019 DD-DSS, Nov. 2019.
  79. Akihisa Abe and Takeo Fujii, “Dynamic bandwidth allocation for spectrum shared private mobile networks using prior measured CQI information”, Proc. IEEE DySPAN 2019 DD-DSS, Nov. 2019.
  80. Yoji Uesugi, Keita Katagiri, Koya Sato, Kei Inage, Takeo Fujii, ”Clustering of signal power distribution toward low storage crowdsourced spectrum database,” VTC-Fall2019 Workshop on 5G and Beyond Technologies for Ultra-Dense Environments, Honolulu, Hawaii, USA, Sept. 2019.
  81. Ying Gao, Ming Diao, Takeo Fujii,”Sensing Sslection based on Dempster-Shafer evidence theory under collaborative spectrum sensing in cognitive radio sensor networks,” VTC-Fall2019 Workshop on 5G and Beyond Technologies for Ultra-Dense Environments, Honolulu, Hawaii, USA, Sept. 2019.
  82. Takeo Fujii “Smart apectrum for 5G and beyond,” 2019 Russia-Japan Joint Microwave and Telecommunication Workshop, Saint Petersburg, Russia, Sept. 2019.
  83. Yu-ki Hatada, Takeo Fujii,”Receiver Beacon Transmission Interval Design Using Machine Learning for Multi-Stage Wireless Sensor Networks,” ICUFN2019, Zagreb, Croatia, July, 2019.
  84. Yudai Yamazaki, Takeo Fujii, Koichi Adachi, Osamu Takyu, Mai Ohta,”Spectrum Sharing Exploiting Spectrum Database for LPWA,” ICUFN2019, Zagreb, Croatia, July, 2019.
  85. Yuki Nishio, Osamu Takyu, Hayato Soya, Mai Ohta, Takeo Fujii, “Optimal channel selection rate of slave terminal for rendezvous channel scheme based on channel occupancy rate,” ICUFN2019, Zagreb, Croatia, July, 2019.
  86. Miho Tanaka, Kenichi Nagasue, Jun Ogawa, Akira Yokomichi, Yoshihiro Ando, Takayuki Ojima, Toshiyuki Shizuoka, Koichi Adachi, Takeo Fujii, “Proactive cache system using cellular-radio information on MEC,” ICUFN2019, Zagreb, Croatia, July, 2019.
  87. Hirofumi Nakajo, Yuya Aoki, Keita Katagiri, Takeo Fujii, ” High density spectrum sharing method among micro operators considering spectrum database,” Proc. WCNC Workshop on Smart Spectrum (IWSS 2019), Marrakech, Morocco, April, 2019.
  88. Keita Katagiri, Keita Onose, Koya Sato, Kei Inage, Takeo Fujii, “Highly Accurate Prediction of Radio Propagation using Model Classifier,” Proc. VTC2019-Spring, Kuala Lumpur, Malaysia, May. 2019.
  89. Yuya Aoki, Takeo Fujii, “Construction of time-space radio environment database using HMM for cooperative sensing,” Proc. ICNC 2019, Honolulu, USA, Feb. 2019.
  90. Yuya Aoki, Takeo Fujii, “Spectrum database construction based on HMM and spectrum sharing in multiple primary users environment,” Proc. ICAIIC2019, Okinawa, Japan, Feb. 2019.
  91. Hang Liu, Xu Zhu, Takeo Fujii, “Cyclostationary based full-duplex spectrum sensing using adversarial training for convolutional neural networks,” Proc. ICAIIC2019, Okinawa, Japan, Feb. 2019.
  92. Hang Liu, Xu Zhu, Takeo Fujii, “Adversarial training for low-complexity convolutional neural networks using in spectrum sensing,” Proc. ICAIIC2019, Okinawa, Japan, Feb. 2019.
  93. Kyosuke Fukuda, Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Shiro Handa, “Adaptive transmission control with prediction of sensing results for PhyC-SN,” Proc. IEEE Radio and Wireless Symposium 2019, Orlando, USA, Jan. 2019.
  94. Keita Onose, Koya Sato, Kei Inage, and Takeo Fujii, “Experimental Verification of Frequency-Correlation in Radio Propagation Characteristics for Radio Environment Recognition,” Proc. IEEE ICOIN 2019, Kuala Lumpur, Malaysia, Jan. 2019.
  95. Toshiki Nonaka, Takeo Fujii, Osamu Takyu, and Mai Ohta, “Network MIMO with Interference Cancellation for Cloud-Cooperated Wireless Sensor Networks,” Proc. IEEE ICOIN 2019, Kuala Lumpur, Malaysia, Jan. 2019.
  96. Tetsuya Noguchi, Osamu Takyu, Takeo Fujii, Tomoaki Ohtsuki, “Performance evaluation of information-sharing scheme among multiple destinations with mirroring null steering in single antenna networks,” Proc. IEEE ICOIN 2019, Kuala Lumpur, Malaysia, Jan. 2019.
  97. Shuhei Yamasaki, Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Shiro Handa, “Data separation considering smoothness of sensing data in physical wireless parameter conversion sensor networks,” Proc. IEEE ICOIN 2019, Kuala Lumpur, Malaysia, Jan. 2019.
  98. Toshiyuki Shizuoka, and Takeo Fujii, “Environmental Aware Hierarchical Ad Hoc Network with Multiple Frequency Bands using Weighted Laplacian Matrix,” Proc. APSIPA ASC 2018, Honolulu, Hawaii, USA, Nov. 2018.
  99. Hang Liu, Xu Zhu, and Takeo Fujii, “Ensemble Deep Learning Based Cooperative Spectrum Sensing with Stacking Fusion Center,” Proc. APSIPA ASC 2018, Honolulu, Hawaii, USA, Nov. 2018.
  100. Naoki Aihara, Koichi Adachi, Osamu Takyu, Mai Ohta, and Takeo Fujii, “SVM Based Orthogonal Resource Allocation in CSMA/CA,” Proc. SmartCom 2018, Bangkok, Thailand, Oct. 2018.
  101. Akihisa Abe, Yuya Aoki, and Takeo Fujii, “Time Series Analysis of Multiple Primary Users by Cooperative Sensing based on SDAR Algorithm,” Proc. SmartCom 2018, Bangkok, Thailand, Oct. 2018.
  102. Yuya Aoki, and Takeo Fujii, “Spectrum Sharing in Cooperation with Time-Space Radio Environment Database,” Proc. SmartCom 2018, Bangkok, Thailand, Oct. 2018.
  103. Hirofumi Nakajo, Yuya Aoki, Keita Katagiri, and Takeo Fujii, “Spatial Spectrum Sharing among Micro Operators considering Distribution on Measurement-based Spectrum Database,” Proc. SmartCom 2018, Bangkok, Thailand, Oct. 2018.
  104. Keita Katagiri, Koya Sato, and Takeo Fujii, “Power Control exploiting Spectrum Database for V2V Communication Systems, ” Proc. SmartCom 2018, Bangkok, Thailand, Oct. 2018.
  105. Tetsuya Noguchi, Osamu Takyu, Takeo Fujii, and Tomoaki Ohtsuki, “A study of multi-antenna relay with mirroring null steering and artificial noise for secure information sharing among multiple nodes,” Proc. SmartCom 2018, Bangkok, Thailand, Oct. 2018.
  106. Kyosuke Fukuda, Osamu Takyu, Keiichiro Shira, Takeo Fujii, Mai Ohta, Fumihito Sasamori, and Shiro Handa, “A study of adaptive transmission control and accurate data separation with prediction of sensing results in PhyC-SN,” Proc. SmartCom 2018, Bangkok, Thailand, Oct. 2018.
  107. Tetsuya Noguchi, Osamu Takyu, Takeo Fujii, and Tomoaki Ohtsuki, “A study of multi-antenna relay with mirroring null steering and artificial noise for secure information sharing among multiple nodes,” Proc. SmartCom 2018, Bangkok, Thailand, Oct. 2018.
  108. Mai Ohta, Koichi Adachi, Naoki Aihara, Osamu Takyu, Takeo Fujii, ” Measurement experiments on 920 MHz band for spectrum sharing with LoRaWAN,” IEEE VTC2018-Fall,Chicago, USA, Aug. 2018.
  109. Kyosuke Fukuda, Osamu Takyu, Keiichiro Shira, Takeo Fujii, Mai Ohta, Fumihito Sasamori, and Shiro Handa, “A study of adaptive transmission control and accurate data separation with prediction of sensing results in PhyC-SN,” Proc. SmartCom 2018, Bangkok, Thailand, Oct. 2018.
  110. Yuya Aoki, Takeo Fujii, Teruji Ide, “Time series analysis of multiple primary user environment using HMM-based spectrum sensing,” IEEE VTC2018-Fall,Chicago, USA, Aug. 2018.
  111. Osamu Takyu, Shohei Fujii, Mai Ohta, Takeo Fujii, Shiro Handa, Fumihito Sasamori, “Channel assignment based on predictions of sensing result and channel occupancy rate in PhyC-SN, IEEE WCNC Workshop on Smart Spectrum 2018, Barcelona, Spain, April 2018.
  112. Yusuke Shirasaki, Osamu Takyu, Takeo Fujii, Tomoaki Ohtsuki, Fumihito Sasamori, and Shiro Handa, “Consideration of security for PLNC with untrusted relay in game theoretic perspective,” Proc. IEEE RWS2018, Anaheim, USA, Jan. 2018.
  113. Tetsuya Noguchi, Osamu Takyu, Takeo Fujii, Tomoaki Ohtsuki, Fumihito Sasamori, and Shiro Handa, “Secure information sharing with mirroring null steering through untrusted relay with two antennas,” Proc. IEEE RWS2018, Anaheim, USA, Jan. 2018.
  114. Takayuki Ojima, and Takeo Fujii, “Resource Management for Mobile Edge Computing Using User Mobility Prediction,” Proc. IEEE ICOIN 2018, Chiang Mai, Thailand, Jan. 2018.
  115. Shunsuke Tsurumi, and Takeo Fujii, “Reliable Vehicle-to-Vehicle Communication Using Spectrum Environment Map,” Proc. IEEE ICOIN 2018, Chiang Mai, Thailand, Jan. 2018.
  116. Hayato Soya, Osamu Takyu, Keiichiro Shirai, Fumihito Sasamori, Shiro Handa, Mai Ohta, and Takeo Fujii, “Modified Rendezvous Scheme with Inferring Access Channel Probability of Slave by Master,” Proc. IEEE ICOIN 2018, Chiang Mai, Thailand, Jan. 2018.
  117. Hiroshi Sanada, Takuya Kawata, Reina Aizawa, Takeo Fujii, “Routing redundancy reducing method for U-Bus Air using cloud cooperation,” ICUFN2018, Prague, Czech Republic, July 2018.
  118. Tetsuya Noguchi, Osamu Takyu, Fumihito Sasamori, Shiro Handa, Takeo Fujii, and Tomoaki Ohtsuki, “Transmit Control for Secure Information Sharing in Untrusted Relay with Two Antennas,” Proc. IEEE ICOIN 2018, Chiang Mai, Thailand, Jan. 2018.
  119. Ryo Kurosawa, Osamu Takyu, Fumihito Sasamori, Shiro Handa, Mai Ohta, and Takeo Fujii, “Experimental Study of Signaling with IFDMA Modulation and Nonlinear Amplifying for Recovering Access Channel Mismatch,” Proc. IEEE ICOIN 2018, Chiang Mai, Thailand, Jan. 2018.
  120. Shuichi Obayashi, Takeo Fujii, “An OTA measurement setup considering human body shadowing effect for indoor millimeter link in specific floor environment,” Proc. IEEE Conference on Antenna Measurements & Applications (CAMA2017), Tsukuba, Japan, Dec. 2017.
  121. Toshiyuki Shizuoka, Osamu Takyu, Mai Ohta, and Takeo Fujii, “Multiband Hierarchical Ad Hoc Network with Wireless Environment Recognition,” Proc. APSIPA ASC 2017, Kuala Lumpur, Malaysia, Dec. 2017.
  122. Tatsuya Ute, Yuta Watanabe, Koya Sato, Takeo Fujii, Takayuki Shimizu, and Onur Altintas, “Multi-antenna successive interference cancellation to improve reliability of V2V communication, ” Proc. IEEE VNC 2017, Torino, Italy, Nov. 2017
  123. Keita Onose, Koya Sato, Kei Inage, and Takeo Fujii, “Experimental Verification of Frequency-Correlation for Radio Environment Recognition Using Crowd Sensing, ” Proc. SmartCom 2017, Rome, Italy, Oct. 2017.
  124. Toshiyuki Shizuoka, Osamu Takyu, Mai Ohta, and Takeo Fujii, “Environmental Aware Hierarchical Wireless Ad Hoc Network on Multiple Frequency Bands and Multiple Channels, ” Proc. SmartCom 2017, Rome, Italy, Oct. 2017.
  125. Yusuke Shirasaki, Osamu Takyu, Takeo Fujii, Tomoaki Ohtsuki, Fumihito Sasamori, and Shiro Handa, “A Study of Secure PLNC Relaying with Untrusted Relay in Game Theoretic Perspective,” Proc. SmartCom 2017, Rome, Italy, Oct. 2017.
  126. Osamu Takyu, Hayato Soya, Keiichiro Shirai, Mai Ohta, Takeo Fujii, Fumihito Sasamori, and Shiro Handa, “A Study of Channel List for Fast Rendezvous Scheme based Estimated Channel Occupancy,” Proc. SmartCom 2017, Rome, Italy, Oct. 2017.
  127. Mai Ohta, Takeo Fujii, Osamu Takyu, and Makoto Taromaru, “A Study on Frequency Asynchronous Spectrum Hole Detection Method,” Proc. SmartCom 2017, Rome, Italy, Oct. 2017.
  128. Koya Sato, Kei Inage, and Takeo Fujii, “Compensation of Survivorship Bias in Path Loss Modeling, ” Proc. IEEE PIMRC 2017, Montreal, Canada, Oct. 2017.
  129. Hang Liu, Xu Zhu, and Takeo Fujii, “Primary user detection in cognitive radio using spectral-correlation features and stacked denoising autoencoder,” Proc. IEEE PIMRC 2017, Montreal, Canada, Oct. 2017.
  130. Keita Katagiri, Koya Sato, and Takeo Fujii, “Crowdsourcing-assisted Radio Environment Maps for V2V Communication Systems, ” Proc. IEEE VTC 2017-Fall, Toronto, Canada, Sept. 2017.
  131. Koji Kakinuma, Takeo Fujii, Osamu Takyu, and Mai Ohta, “Multiple information collection with frequency offset compensation by utilizing physical wireless parameter conversion sensor network (PHY-C SN),” Proc. ICUFN 2017, Milan, Italy, July 2017.
  132. Rei Hasegawa, and Takeo Fujii, “Measurement-based spectrum database with mesh clustering,” Proc. ICUFN 2017, Milan, Italy, July 2017.
  133. Mai Ohta, Osamu Takyu, Takeo Fujii, and Makoto Taromaru, “Robust channel selection method under home electronics-derived electromagnetic wave interference,” Proc. ICUFN 2017, Milan, Italy, July 2017.
  134. Koya Sato and Takeo Fujii, “Radio Environment Aware Computation Offloading with Multiple Mobile Edge Computing Servers, ” Proc. IEEE WCNC-IWSS 2017, San Francisco, USA, March 2017.
  135. Takehiro Sakai, Osamu Takyu, Keiichiro Shirai, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa, “Data tracking using frequency offset and SIC for physical wireless conversion sensor networks,” Proc. WCNC-IWSS 2017, San Francisco, USA, March 2017.
  136. Hayato Soya, Osamu Takyu, Keiichiro Shirai, Fumihito Sasamori, Shiro Handa, Mai Ohta, Takeo Fujii, “Measurement technique for occupancy ratio and transition ratio in cognitive radio system,” Proc. WCNC-IWSS 2017, San Francisco, USA, March 2017.
  137. Koji Ichikawa and Takeo Fujii, “Radio Environment Map Construction Using Hidden Markov Model in Multiple Primary User Environment, ” Proc. ICNC 2017, San Francisco, USA, Jan. 2017.
  138. Koji Kakinuma and Takeo Fujii, “Multiple Information Collection by Utilizing Physical Wireless Parameter Conversion Sensor Network (PHY-C SN),” IEEE ICOIN 2017, Da Nang, Vietnam, Jan. 2017.
  139. Takumi Kimura, Osamu Takyu, Fumihito Sasamori, Shiro Handa, Takeo Fujii, Mai Ohta, “Optimization of multi-channel access in learning assisted measurement of channel occupancy ratio by USRP,” Proc. IEEE ICOIN 2017, Da Nang, Vietnam, Jan. 2017.
  140. Mai Ohta, Makoto Taromaru, Takeo Fujii, Osamu Takyu,”Spectrum edge decision method for energy detection with FFT,” Proc. IEEE ICOIN 2017, Da Nang, Vietnam, Jan. 2017.
  141. Shohei Fujii, Osamu Takyu, Fumihito Sasamori, Shiro Handa, Takeo Fujii, Mai Ohta, “Optimal cluster head selection and rotation of cognitive wireless sensor networks for simultaneous data gathering,” Proc. IEEE ICOIN 2017, Da Nang, Vietnam, Jan. 2017.
  142. Xu Zhu, Takeo Fujii, “A novel modulation classification method in cognitive radios using higher-order cumulants and denoising stacked sparse autoencoder,” IEEE RWS 2017, Arizona, USA, Jan. 2017.
  143. Cong-Hoang Diem, Takeo Fujii, “Relay selection method using radio environment database for multi-hop V2V communications, ” Proc. IEEE ICOIN 2017, Da Nang, Vietnam, Jan. 2017.
  144. Xu Zhu, Takeo Fujii, “Modulation classification method in cognitive radios system using stacked denoising sparse autoencoder,” Proc. APSIPA ASC 2016, Jeju, Korea, Dec. 2016.
  145. Minato Oriuchi, Osamu Takyu, Keiichiro Shirai, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa, “Fundamental study of decomposition based on heterogeneous sensing data in physical conversion sensor networks,” Proc. APSIPA ASC 2016, Jeju, Korea, Dec. 2016.
  146. Yuta Watanabe, Koya Sato, and Takeo Fujii, “A scheduling method for V2V networks using successive interference cancellation, ” Proc. IEEE VNC 2016, Columbus, USA, Dec. 2016.
  147. Koya Sato, Kei Inage, Takeo Fujii, “Spectrum Database-assisted Radio Propagation Prediction for Wireless Distributed Networks: A Geostatistical Approach, ” IEEE PIMRC 2016, Valencia, Spain, Sept. 2016.
  148. Hang Liu and Takeo Fujii, “Single-channel Blind Identification Based Advanced Energy Detection for Cognitive Radio,” Proc. ICUFN 2016, Vienna, Austria, July 2016.
  149. Tomokazu Moriyama, Taiki Nakayama, and Takeo Fujii, “Receiver Beacon Transmission Interval Design for Multi-Stage Wireless Sensor Networks,” Proc. ICUFN 2016, Vienna, Austria, July 2016.
  150. Huifa Lin, Koji Ishibashi, Won-Yong Shin, and Takeo Fujii, “Decentralized Power Allocation for Secondary Random Access in Cognitive Radio Networks with Successive Interference Cancellation, ” Proc. ICC 2016, Kuala Lumpur, Malaysia, May 2016.
  151. Osamu Takyu, Keiichiro Shirai, Mai Ohta, Takeo Fujii, Fumihito Sasamori, and Shiro Handa, “Decomposition based on Heterogeneous Sensing Data in Physical Wireless Conversion Sensor Networks ,” Proc. SmartCom 2016, Oulu, Finland, May 2016.
  152. Mai Ohta, Makoto Taromaru, Takeo Fujii, and Osamu Takyu, “A study on energy detection with FFT in cognitive radio systems for improving detection performance,” Proc. SmartCom 2016, Oulu, Finland, May 2016.
  153. Koji Ichikawa and Takeo Fujii, “Spectrum Sensing Using Hidden Markov Model for Measurement Based Spectrum Database,” Proc. SmartCom 2016, Oulu, Finland, May 2016.
  154. Koya Sato, Kei Inage and Takeo Fujii, “Impact of Spectrum Database-assisted Any-to-Any Radio Propagation Estimation on Multihop Routing,” Proc. SmartCom 2016, Oulu, Finland, May 2016.
  155. Janne Lehtomaki, Takeo Fujii(The University of Electro-Communications, Japan) and Brian Mark, “Trends, Research Activities, and Views on Future Spectrum Management,” Keynote speech WCNC-IWSS 2016, Doha, Qatar, April 2016.
  156. Osamu Takyu, Kengo Matsumoto, Takeo Fujii, Tomoaki Ohtsuki, Fumihito Sasamori and Shiro Handa, “Optimal Impersonation of CSI for Maximizing Leaked Information to Untrusted Relay in PLNC,” Proc. WCNC 2016, Doha, Qatar, April 2016.
  157. Mai Ohta, Osamu Takyu, Takeo Fujii(The University of Electro-Communications, Japan) and Makoto Taromaru, “Novel Two-Stage Spectrum Sensing for Energy Detection with FFT,” Proc. WCNC-IWSS 2016, Doha, Qatar, April 2016.
  158. Minato Oriuchi, Osamu Takyu, Keiichi Shirai, Takeo Fujii, Mai Ohta , Fumihito Sasamori and Shiro Handa , “Performance Evaluation of Multi-Target Tracking for PhyC-SN,” Proc. WCNC-IWSS 2016, Doha, Qatar, April 2016.
  159. Vannapha Southivong, Takeo Fujii, “Transmitter identification sensing in cognitive radio using energy detection with the statistical information,” NCSP’16, Honolulu, USA, March 2016.
  160. Mai Ohta, Osamu Takyu, Takeo Fujii, Makoto Taromaru, “A white-space width estimation with windowed FFT based energy detection,” NCSP’16, Honolulu, USA, March 2016.
  161. Taiki Nakayama, Takeo Fujii, Osamu Takyu, Mai Ohta, “Information mapping parameter control method for physical wireless parameter conversion sensor networks,” NCSP’16, Honolulu, USA, March 2016.
  162. Xu Zhu, Takeo Fujii, “Modulation classification in cognitive radios basing on features clustering,” IEEE RWS2016, Austin, USA, Jan. 2016.
  163. Minato Oriuchi, Osamu Takyu, Keichirou Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Shiro Handa, “Multi-target tracking based on features of sensing results and wireless parameters for physical wireless parameter conversion sensor networks,” IEEE RWS2016, Austin, USA, Jan. 2016.
  164. Cong-hoang Diem, Takeo Fujii, “An efficient cooperative transmission scheme for vehicular communications,”IEEE ITST2015, Copenhagen, Denmark, Dec. 2015.
  165. Koji Kakinuma, Shunsuke Takagi, Shunta Sakai, Takeo Fujii,”Fusion Center Controlled Carrier Sense Multiple Access for Physical Wireless Parameter Conversion Sensor Networks,” APSIPA ASC 2015, Hong Kong, Dec. 2015.
  166. Daichi Ishikawa, Koya Sato, Takeo Fujii, Matthias S Wilhelm, Haris Kremo and Onur Altintas (Toyota InfoTechnology Center, Japan), “Location-Based Distributed Channel Assignment for Communications Among Autonomous Vehicles,”Proc. IEEE VNC, Kyoto, Japan, Dec. 2015.
  167. Koya Sato, Takeo Fujii,”Kriging-based Interference Power Constraint for Spectrum Sharing based on Radio Environment Map, “Proc. IEEE GLOBECOM Workshop on Emerging Technologies for 5G Wireless Cellular Networks (ET5G),San Diego, USA, Dec. 2015.
  168. Shohei Fujii, Osamu Takyu, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Shiro Handa, “Selection method of cluster head in wireless sensor networks of wireless physical conversion for spectrum sharing,” ICTC2015, Jeju island, Korea, Oct. 2015.
  169. Hao Wang, Koya Sato, Takeo Fujii,”Received Power Detection under Multiple ON/OFF Environment for Registering Radio Environment Database, ” ICTC2015, Jeju island, Korea Oct. 2015.
  170. Minato Oriuchi, Osamu Takyu, Keichirou Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Sirou Handa, “Multi-target tracking based on features of sensing results and wireless parameters for physical wireless prameter conversion sensor networks,” SmarCom2015, Nov. 2015.
  171. Shunsuke Takagi, Taiki Nakayama, Takeo Fujii, Takumi Kimura, Osamu Takyu, Mai Ohta, “Highly Efficient Environment Aware Wireless Sensor Network,” SmarCom2015, Nov. 2015.
  172. Hao Wang, Takeo Fujii,”Active Period Detection Method of Primary Signal for Radio Environment Database, “SmartCom2015, Tokyo, Japan, Oct. 2015.
  173. Tsukasa Yoneda, Osamu Takyu, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa, “High speed and small signaling overhead rendezvous in cognitive radio system, IEEE APWCS 2015, Singapore, Aug. 2015.
  174. Koji Ichikawa, Hao Wang, Koya Sato, Takeo FUJII,”Height Power Estimation with Radio Environment Database in Urban Area, “Proc.ICUFN2015, Sapporo, Japan, July 2015.
  175. Xu Zhu, Takeo Fujii, “Modulation classification in cognitive radios for satellite and terrestrial systems,” IEEE ICC Workshop CogRaN-Sat, pp.1612-1616, London, UK, June 2015.
  176. Vannapha Southivong, Takeo FUJII, “Primary and Secondary Identification using Energy Detection with Statistical Primary Information, ” Proc. IEEE WCNC 2015 International Workshop on Smart Spectrum, New Orleans, March 2015.
  177. Koya Sato, Takeo Fujii, “Average Interference Power Constraint with Measurement-based Spectrum Database, ” Proc. IEEE WCNC 2015 International Workshop on Smart Spectrum, New Orleans, March 2015.
  178. Kengo Matsumoto, Osamu Takyu, Takeo Fujii, Tomoaki Ohtsuki, Fumihito Sasamori, Shiro Handa, “Evaluation of information leak by robustness evaluation of countermeasure to disguised CSI in PLNC considering physical layer security,” Proc. IEEE RWS 2015, San Diego, USA, Jan. 2015.
  179. Takashi Kosugi, Takeo FUJII, “Spectrum Sharing Method to Form Bundle of White Space in Cognitive Radio,”Proc. IEEE CCNC2015,LasVegas Jan,2015.
  180. Cong-Hoang Diem, Takeo FUJII, “A Novel Distributed STBC Cooperative Diversity Scheme for OFDM Multi-hop Relay Networks,”Proc. IEEE CCNC2015,LasVegas Jan,2015.
  181. Shamsad Parvin, Takeo Fujii, “Mobility aware stable routing scheme for mobile multi hop cognitive radio network,” Proc. APSIPA-ASC 2014, Siem Reap, Cambodia, Dec. 2014.
  182. Akinari Ida, Takeo Fujii, “Physical Layer Security Using Multi-band Transmission Considering Channel Selection for Cognitive Radio Network,”Proc. APSIPA ASC,Cambodia Dec,2014.
  183. Osamu Takyu, Takayuki Yamakita, Takeo Fujii, Fumihito Sasamori, Shiro Handa, “Learning assisted rendezvous channel in cognitive radio system,” Proc. IEEE ICCS 2014, Macau, Nov. 2014.
  184. Kohsuke Nakagawa, Takeo FUJII, “Adaptive parameter control for cooperative spectrum sensing for wireless vehicular networks based on measurement-based spectrum database, ” SDR-WInnComm-Europe 2014, Rome, Italy, Nov. 2014.
  185. Shunsuke Takagi, Shunta Sakai, Koya Sato, Takeo FUJII, “Spectrum Shared Wireless Sensor Networks based on Radio Environment Database, ” SDR-WInnComm-Europe 2014, Rome, Italy, Nov. 2014.
  186. Mai Ohta, Osamu Takyu, Takeo Fujii, Makoto Taromaru, “Transmission decision algorithm for updating sensing information,” Proc. SDR-WInnComm-Europe 2014, Rome, Italy, Nov. 2014.
  187. Ryo Myoenzono, Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Shiro Handa, “Data tracking and effect of frequency offset to simultaneous collecting method for wireless sensor networks,” Proc. IEEE ICTC 2014, pp.34-38, Inchon, Korea, Oct. 2014.
  188. Takashi Kosugi,Takeo FUJII,”Channel Assignment Method for Effective Entry of New Secondary Users in Cognitive Radio, “SmartCom2014, Singapore, Oct. 2014.
  189. Vannapha Southivong,Takeo FUJII,”Identified Primary Sensing using Energy Detection with Radio Environment Information, “SmartCom2014, Singapore, Oct. 2014.
  190. Ryo Myoenzono, Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Shiro Handa, “Data tracking and effect of frequency offset to simultaneous collecting method for wireless sensor networks,” Proc. IEEE ICTC 2014, pp.34-38, Inchon, Korea, Oct. 2015.
  191. Osamu Takyu, Ryo Myoenzono, Keiichi Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Shiro Handa, “Data Tracking in Wireless Sensor Network of Simultaneous Data Collection Scheme,” Proc. of SmartCom 2014, Singapore, Oct. 2014.
  192. Ryota Higashi, Mai Ohta, Osamu Takyu, Takeo Fujii, Makoto Taromaru, “A Study on Undesired Spectrum Detection Method with FFT,” Proc. of SmartCom 2014, Singapore, Oct. 2014.
  193. Massa Ndong,Takeo FUJII,”Joint Femtocell Clustering and Cross-tier Interference Mitigation with Distributed Antenna System in Small Cell Networks,”CSNDSP14,Manchester,UK,July 2014.
  194. Masahiro Endo, Tomoaki Ohtsuki, Takeo Fujii, Osamu Takyu, “Secondary Transmit Beamformings for Spectrum Leasing in CRNs in the Presence of Eavesdropper,” Proc. of IEEE PIMRC 2014, Washington D.C., Spet. 2014.
  195. Shunta Sakai, Takeo FUJII, “Performance of Physical Wireless Parameter Conversion Sensor Network (PHY-C SN) using Frequency Hopping, “triSAI/IC-NIDC2014, Beijing, China, Spet. 2014.
  196. Taiki Nakayama, Takeo FUJII, “Adaptive Parameter Control for Physical Wireless Parameter Conversion Sensor Network (PHY-C SN) according to Feature of Sensing Information, “triSAI/IC-NIDC2014, Beijing, China, Spet. 2014.
  197. Xu Zhu, Takeo FUJII, “PSK Classification basing on Time-Frequency Distribution, “triSAI/IC-NIDC2014, Beijing, China, Spet. 2014.
  198. Hao Wang,Takeo FUJII,”Transition Detection with Spectrum Database Using Cooperative Sensing,”Proc.ICUFN2014,Shanghai,China,July 2014.
  199. H. Kremo,O. Altintas,H. Tanaka(Toyota InfoTechnology Center,Japan),M. Kitamura,K. Inage,T. FUJII,”Cooperative Spectrum Sensing in the Vehicular Environment: An Experimental Evaluation,” Proc. IEEE VTC2014Spring,Seoul,Korea,May 2014.
  200. Mai Ohta,Makoto Taromaru(Fukuoka University),Osamu Takyu(Shinshu University),Takeo FUJII,”A study on repetition of information update based on reliability of database in cognitive radio,” Proc. NCSP2014,Hawaii,USA,March 2014.
  201. Masayuki Goto,Osamu Takyu(Shinshu University),Takeo FUJII,Fumihito Sasamori,Shiro Handa,”Protocol Analysis of Signal Detection for Deriving Minimum Isolation Distance for Frequency Recycling under WLAN Systems,”IEEE Radio Wireless Symposium (RWS) 2014,pp.262-264,New Port Beach,USA,Jan. 2014.
  202. Masafumi Moriyama,Takeo FUJII,”Viterbi decoding employing a heterogeneous cognitive radio for public mobile communication systems” SDR-WInnComm2014,Illinois,USA,March 2014.
  203. Yuya Ohue,Kei Inage,Masayuki Kitamura,Takeo FUJII,”Weighted Cooperative Sensing based on Spectrum Database for Cognitive Vehicular Networks” SDR-WInnComm2014,Illinois,USA,March 2014.
  204. Masayuki Kitamura,Kei Inage,Yuya Ohue,Takeo FUJII,”Development of Measurement based Spectrum Database for Efficient Spectrum Sharing” SDR-WInnComm2014,Illinois,USA,March 2014.
  205. Tomomi ENDO,Takeo FUJII,”Information Estimation Method forWide Area Sensor Networks using Information Converting to Wireless Physical Parameters” Proc. NCSP2014,Hawaii,USA,March 2014.
  206. Shunta Sakai,Tomomi Endo,Takeo FUJII,”Multiple Data Gathering with Frequency Conversion for Wireless Sensor Network using Frequency Hopping” Proc. NCSP2014,Hawaii,USA,March 2014.
  207. Koya Sato,Kei Inage,Takeo FUJII,”Parameter Estimation Method of Primary User Using Measurement-based Spectrum Database” Proc. IEEE CCNC2014,LasVegas Jan,2014.
  208. Takeo FUJII,Kei Inage(The University of Electro-Communications,Japan),Masayuki Kitamura (The University of Electro-Communications),Onur Altintas (Toyota InfoTechnology Center,Japan),Haris Kremo (Toyota InfoTechnology Center,Japan),Hideaki Tanaka (Toyota InfoTechnology Center,Japan),”Probing the Spectrum with Vehicles: Towards an Advanced Spectrum Database,” Proc. VNC2013,Boston,USA,Dec. 2013.
  209. Tsubasa Suzuki,Takeo FUJII,”Spectrum Sharing between IVC and RVC in Multihop Vehicular Cognitive Radio,” ITST 2013,Tampere,Finland,Nov. 2013.
  210. Tsubasa Suzuki,Takeo FUJII,Shuta Kako,Takamasa Kimura,”High Throughput Routing based on SNR Prediction for Variable Mobility Nodes,” ITS World Congress 2013,Tokyo,Japan,Oct. 2013.
  211. Kei Inage,Takeo FUJII,”Interference-Adapted Scheduling Weight for Small-cell in Heterogeneous Network,” PIMRC 2013-Workshop-WDN-CN2013: 2013 International WDN workshop on cooperative and heterogeneous cellular networks,London,UK,Sept. 2013.
  212. Kenichi Tsukada,Takayuki Suzuki,Takeo FUJII,Osamu Takyu(Shinshu University),Tomoaki Ohtsuki(Keio University),”Secondary Node Cooperation with Enhancing Secure Capacity under Existence of Primary System,” APWCS2013,Seoul,Korea,Aug 2013.
  213. Kazuma Yamaguchi,Osamu Takyu,Takeo FUJII,Tomoaki Ohtsuki,Fumihito Sasamori,Shiro Handa”Physical Layer Network Coding with Multiple Untrusted Relays for Physical Layer Network Coding,”APWCS2013,Seoul,Korea,Aug 2013.
  214. Yuta Wakao,Osamu Takyu,Takeo FUJII,Fumihito Sasamori,Shiro Handa,”High‐Accurate and Time‐Traceable Occupancy Ratio Measurement for Cognitive Radio System,” APWCS2013,Seoul,Korea,Aug 2013.
  215. Masayuki Goto,Osamu Takyu,Takeo FUJII,Fumihito Sasamori,Shiro Handa,”Analysis of Channel Usage Tendency from Indoor Measurement Results in Wireless LAN System,” APWCS2013,Seoul,Korea,Aug 2013.
  216. Hailan Peng,Takeo FUJII,”Hybrid Overlay/Underlay Resource Allocation for Cognitive Radio Networks in User Mobility Environment ,” VTC2013-Fall,Las Vegas,USA ,Sept. 2013.
  217. Arash Asareh,Takeo FUJII,”Delay Reduction Scheme Based on Fountain Coding for Wireless Relay Communication Systems ,” VTC2013-Fall,Las Vegas,USA ,Sept 2013.
  218. Shunta Sakai,Tomomi Endo,Takeo FUJII,”Frequency Assigned Information Gathering Method for Motion-Capture in Wireless Sensor Networks,” ICUFN2013,Da Nang,Vietnam,July 2013.
  219. Takashi Kosugi,Kei Inage,Takeo FUJII,”Spectrum Sharing among Multiple Secondary Users Using Channel Assignment Method of High Spatial Efficiency Based on Mutual Interference,” SDR-WInnComm-Europe 2013,Munich,Germany,June 2013.
  220. Shuta Kako(The University of Electro-Communications,Japan),Osamu Takyu (Shinshu University,Japan),Takeo FUJII,”Resource Control for Cognitive Multi-hop Network in Traffic Cross Environment,” Proc. PerCom2013,San Diego,California,March 2013.
  221. Mai Ohta,Takeo FUJII,”Control Channel Selection for Expanding White Space Length using Channel Statistic Information with Observation Error,” Proc. NCSP2013,Hawaii,USA,March 2013.
  222. Yutaka Ihara,Haris Kremo,Onur Altintas,Hideaki Tanaka(Toyota InfoTechnology Center,Japan),Masaaki Ohtake,Takeo FUJII,Chikara Yoshimura,Keisuke Ando,Kazuya Tsukamoto,Masato Tsuru,Yuji Oie(Kyushu Institute of Technology,Japan),”Distributed Autonomous Multi-Hop Vehicle-to-Vehicle Communications over TV White Space,” Proc. CCNC2013,Las Vegas,Jan. 2013.
  223. Masayuki Kitamura,Takeo FUJII,Masaaki Ohtake,Yuya Ohue(The University of Electro-Communications,Japan),”Real Time Spectrum Sensing by using Frequency Shifted Sensor for Spectrum Sharing Cognitive Radio,” Proc. SDR2013,Washington,DC,Jan. 2013.
  224. Masaaki Ohtake,Takeo FUJII,Haris Kremo(Toyota InfoTechnology Center,Japan),Onur Altintas(Toyota InfoTechnology Center,Japan),”Self-interference cancellation towards real-time spectrum sensing in vehicular dynamic spectrum access systems,” Proc. SDR2013,Washington,DC,Jan. 2013.
  225. Daeyeon KIM,Takeo FUJII,Kyesan LEE(Kyunghee University,South Korea),”OFDMA Resource Allocation for Multicasting Videos to Users with Diverse Screen Sizes,” Proc. ICCS2012,Singapore,Nov. 2012.
  226. Tomomi ENDO,Takeo FUJII,”Real Time Information Gathering based on Frequency and Timing Assignment for Wireless Sensor Networks,” Proc. ICCS2012,Singapore,Nov. 2012.
  227. Daeyeon Kim,Takeo Fujii(The university of electrocommunications,Tokyo,Japan),”Iterative video-aware waterfilling algorithm for SVC streaming over OFDMA downlink channel,” Proc. ICWITS,Maui,USA,Nov. 2012.
  228. Daeyeon Kim,Takeo Fujii(UEC),Kyesan Lee(Kyung Hee University),”Power Allocation Algorithm for Multicasting Data over Cooperative Multi-cell OFDMA Channel,” Proc. TriSAI2012,Tokyo,Japan,Spet. 2012.
  229. Yasushi Yamao,Takeo Fujii,Kiyohiko Hattori,Nobuo Nakajima (UEC),”Robust and Easily Deployed Information Sharing System Architecture for Disaster Area -Integration of Adhoc Network and Moving Servers- ,” Proc. TriSAI2012,Tokyo,Japan,Spet. 2012.
  230. Zhu Xu(Harbin Engineering University),Takeo Fujii(UEC),”Wideband Spectrum Sensing based on Wavelet Transform,” Proc. TriSAI2012,Tokyo,Japan,Spet. 2012.
  231. Massa Ndong,Takeo Fujii(UEC),”Cross-tier Interference Management with Distributed Antenna System for Femtocell Self Optimized Networks ,” Proc. TriSAI2012,Tokyo,Japan,Spet. 2012.
  232. Parvin Shamsad(The University of Elcetro-Communications & Fujii Laboratory,Japan),Takeo Fujii,”Radio Environment Aware Stable Routing for Multi-hop Cognitive Radio Networks,” Proc.PIMRC 2012,Sydney,Australia,Spet. 2012.
  233. Naoki Onda,Takeo Fujii,”Performance Evaluation Model with Cost of Relay for Multi-Cell Cooperative Multi-hop Cellular System,” Proc.PIMRC 2012,Sydney,Australia,Spet. 2012.
  234. Mai Ohta,Takamasa Kimura,Hasan Rajib Imam(University of Electro-Communications),Sean Rocke,Jingkai Su,Alexander Wyglinski(Worcester Polytechnic Institute),Takeo Fujii(University of Electro-Communications),”Channel Selection Statistics for Control Information Sharing within Cognitive Radio Networks,” Proc.VTC2012-Fall,Quebec,Canada,Spet. 2012.
  235. Shuta Kako,Takeo Fujii,Osamu Takyu(Shinshu University,Japan),”Dynamic Spectrum Sharing for OFDMA-Based Multi-hop Cognitive Radio Networks with Priority,” Proc.ICUFN 2012,Phuket,Thailand,July 2012.
  236. Massa Ndong,Takeo Fujii,”Cross-tier Interference Mitigation for Self Organized-Self Optimized Femtocells,”Proc.WTS 2012,London,UK,April 2012.
  237. Hailan Peng,Takeo Fujii,”Joint Resource Allocation and Interference Avoidance with Fairness Consideration for Multi-cell Cognitive Radio Networks,”Proc.WCNC 2012,PARIS,FRANCE,April 2012.
  238. Arash Asareh,Takeo Fujii,”A Novel Reliable Broadcasting Scheme under Cognitive Radio Environment Based on Erasure Correctable Codes,” Proc. ICNC 2012,Maui,Hawaii,U.S.A.,Jan. 2012.
  239. Sarenna Bao,Takeo Fujii,”Q-learning Based p-pesistent CSMA MAC Protcol for Secondary User of Cognitive Radio Networks,” Proc.INCoS 2011,Fukuoka,Japan,Dec. 2011.
  240. Kazuhisa Okamoto,Mai Ohta,Kei Inage,Takeo Fujii,Masayuki Ariyoshi,”Spectrum Sharing Method using Frequency Priority Table for Reducing Interference among Secondary Systems,” Proc. SDR’11-WinnComm,Washington,D.C.,U.S.A,Nov. 2011.(BEST of R&D Track)
  241. Hasan Rajib Imam,Kei Inage,Mai Ohta,Takeo Fujii,”Measurement based radio environment database using spectrum sensing in cognitive radio,” Proc. iCOST 2011,Shanghai,China,Oct. 2011.
  242. Kei Inage,SeonNyeon Lee,Takeo Fujii,Onur Altintas,”White space vectors for channel selection in vehicular cognitive networks,” Proc. VNC 2011,Amsterdam,The Netherlands,Nov. 2011.
  243. Kensuke Fujii,Takeo Fujii,”Multi-cell Shared Multi-user MIMO Relay for Broadband Cellular Systems,” Proc. ISWCS 2011,Aachen,Germany,Oct. 2011.
  244. Takamasa Kimura,Takeo Fujii,”A CSMA/CA Based MAC Protocol to Improve TCP Performance in Multi-hop Cognitive Network,” Proc. SISA 2011,Nagasaki,Japan,Oct. 2011.
  245. P. Shamsad,T. Fujii,”A Novel Spectrum Aware Routing Scheme for Multi-hop Cognitive Radio Mesh Networks,” Proc. PIMRC 2011,Toronto,Canada,Spet. 2011.
  246. C. Sertthin,T. Ohtsuki,O. Takyu,T. Fujii,Y. Umeda,”A Nearest Transmitter Classification Method for VLC Based Positioning System,” Proc. PIMRC 2011,Toronto,Canada,Spet. 2011.
  247. O. Takyu,Y. Seki,T. Yamasaki,T. Fujii,Y. Umeda,X. Wang,S. Konish,”Fundamental Study on Adaptive ACK Link Control for Downloading based on TCP Connection in Mobile Wireless Communication,” Proc. PIMRC 2011,Toronto,Canda,Spet. 2011.
  248. Osamu Takyu,Takahiro Saiwai,Takeo Fujii,Yohtaro Umeda,”Performance for MAC Level Channel Capacity in Cognitive Radio with Carrier Sense Multiple Access and TransmittingPower Control,Proc. VTC 2011-Fall,San Francisco,USA,Spet. 2011.
  249. Huifa Lin,Takeo Fujii,”Cluster Relay with MRC Receiving and Distributed Beam-forming Scheme,” Proc. TriSAI2011,Daejeon,Korea,August 2011.
  250. Shuta Kako,Takeo Fujii,Oasamu Takyu,”Dynamic Spectrum Sharing for Multi-hop Cognitive Radio with Channel Priority” Proc. TriSAI2011,Daejeon,Korea,August 2011.
  251. Shamsad Parvin,Takeo Fujii,”Minimum Interference Based Routing Scheme for Multi Hop Cognitive Radio Mesh Network,” Proc. TriSAI2011,Daejeon,Korea,August 2011.(Best Paper Award)
  252. Hailan Peng,Takeo Fujii,”Joint Resource Allocation and Interference Avoidance for Multi-cell Cognitive Radio Networks with Primary Assistance,” Proc. TriSAI2011,Daejeon,Korea,August 2011.
  253. Kei Inage,Takeo Fujii,”FFR-Based Scheduling Method for Spectrum Sharing among Secondary Systems,” Proc. TriSAI2011,Daejeon,Korea,August 2011.
  254. Takayuki Suzuki,Takeo Fujii,Osamu Takyu,”An Intelligent Secondary MAC Protocol Using Shared Spectrum with IEEE802.11 Wireless LAN,” Proc. ICUFN2011,Dalian,China,June 2011.
  255. Massa Ndong,Takeo Fujii,”Interference Cancellation for Spectrum Shared Femtocell Networks with Macrocell Information Feedback,” Proc. ICUFN2011,Dalian,China,June 2011.
  256. Mai Ohta,Takeo Fujii,Kazushi Muraoka,Masayuki Ariyoshi,”A Novel Power Controlled Sensing Information Gathering for Cooperative Sensing on Shared Spectrum with Primary Spectrum,” Proc. CrownCom2011,Osaka,Japan,June 2011.
  257. Hiroyoshi Yano,Osamu Takyu,Takeo Fujii,Tomoaki Ohtsuki,”Low Complexity Cyclostationary Feature Detection Method to Compenstate Cyclostationarity-Degradation by Guard Interval Interval Insertion,” Proc. CrownCom2011,Osaka,Japan,June 2011.
  258. Osamu Takyu,Shunta Horie,Hasan Rajib Iman,Masahiro Furuichi,Takamasa Kimura,Takeo Fujii,Yohtaro Umeda,”Measurement method and result for Frequency Spectrum Sharing in Cognitive Radio,” Proc. CrownCom2011,Osaka,Japan,June 2011.
  259. Mai Ohta,Takeo Fujii,”Iterative Cooperative and Sensing on Shared Primary Spectrum for Improving Sensing Ability,” Proc. DySPAN2011,Aachen,Germany,May 2011.
  260. Fengming Xu,Takeo Fujii,”Frequency Sharing Schedule with OFDMA for Road to Vehicle and Inter-vehicle Communications,” Proc. MC-SS2011,Munich,Germany,May 2011.
  261. Kei Inage,Takeo Fujii,Kazushi Muraoka,Masayuki Ariyoshi,”Power Control Schemes for Spectrum Sharing Based on Capacity Conservation Ratio in Rayleigh Fading Channel,” Proc. IEEE CCNC2011,Las Vegas,U.S.A.,Jan.2011.
  262. Onur Altintas,Mitsuhiro Nishibori,Rama K Vuyyuru,Youhei Fujii,Kota Nishida,Yuji Oie,Kazuya Tsukamoto,Masato Tsuru,Abdulrahman AL-Abbasi,Takeo Fujii,Srikanth Pagadarai,Alexander M. Wyglinski,”Implementation and Evaluation of Distributed Control and Data Channel Coordination Algorithms for V2V Dynamic Spectrum Access,” Proc. SDR2010,Washington D.C.,U.S.A.,Nov. 2010.
  263. Shamsad Parvin,Takeo Fujii,”A Novel Routing Scheme with High Sensitive Sensing for Multi hop Wireless Mesh Network” Proc. INCoS ,Nov 2010,Thessaloniki,Greece.
  264. Hailan Peng,Takeo Fujii,“Cross-Layer Resource Allocation for Downlink OFDMA-based Cognitive Radio Systems using Convex Optimization,” Proc. TriSAI2010,Beijing,China,Oct. 2010.
  265. Shamsad Parvin,Takeo Fujii,”Hidden Node Aware Routing method Using High Sensitive Sensing Device for Multi hop Wireless Mesh Network ” Proc. TriSai,Beijing,China,Oct. 2010.
  266. Kensuke Fujii,Takeo Fujii,”A Study of Intercell Interference Reducation Using Multiuser MIMO Relay Station,” Proc. TriSAI2010,Beijing,China,Oct. 2010.
  267. Mai Ohta,Takao Fujii,”A Study of Cooperative Sensing Method with Iterative Sensing Information Exchange on Shared Spectrum of Primary System,” Proc. TriSAI2010,Beijing,China,Oct. 2010. (Best Paper Award – Student Session)
  268. H Y. Zheng,Takeo Fujii,”Pre-channel compensation-at RS for MC-CDMA downlink ralay system,” Proc. ISWCS 2010,York,UK,Sept. 2010.
  269. Arash Asareh,Takeo Fujii,”Performance Evaluation of Coding-Based Cognitive Radio for Various Packet Sizes,” Proc. IEEE WDN2010,Istanbul,Turkey,Spet. 2010.
  270. Haiyan Zheng,Hailan Peng,Takeo Fujii,”Sub-band Pre-Channel Compensation-at RS for MC-CDMA Downlink Relay System,” Proc. ISWCS 2010,York,UK,Sept. 2010.
  271. Yueting Hu,Takeo Fujii,”STBC Cooperative Relay for Packet Broadcasting,” Proc. ISWCS 2010,York,UK,Sept. 2010.
  272. Hailan Peng,Takeo Fujii,”Joint Cross-Layer Resource Allocation and Interference Avoidance with QoS Support for Multiuser Cognitive Radio Systems,” Proc. ISWCS 2010,York,UK,Sept. 2010.
  273. Hung Vu Le,Mai Ohta,Kei Inage,Takeo Fujii,Kazushi Muraoka,and Masayuki Ariyoshi,”Outlier Detection Methods of Low SNR Nodes for Cooperative Spectrum Sensing,” Proc. ISWCS 2010,York,UK,Sept. 2010.
  274. AbdulRahman AL-ABBASI,Takeo FUJII,”A Novel Blind Diversity Detection Scheme for Multi-antenna Cognitive Radio Spectrum Sensing,Proc. VTC2010-Fall,Ottawa,canada,Sept. 2010.
  275. Takamasa Kimura,Takeo Fujii,”Flow Rate Control Considering TCP Behavior for Heterogeneous Cellular System,” Proc. IWMST 2010,Kitami,Sept. 2010.
  276. Hoa Tung Le,Takeo Fujii,”Information Sharing in Sparse Traffic Area by Low Level Carrier Sense for VANET,” Proc. ICUFN 2010,June 2010.
  277. Daeyeon Kim,Takeo Fujii,Kyesan Lee,”Resource Allocation Method for OFDM System to Transmit SVC over Frequency Selective Channel,” Proc. AICT 2010,May 2010.
  278. Daeyeon Kim,Takeo Fujii,Kyesan Lee,”An Unequal Protection Method for Multiuser OFDM to Minimize Video Distortion,” Proc. AICT 2010,May 2010.
  279. Kei Inage,Takeo Fujii,Kazushi Muraoka,Masayuki Ariyoshi,”A Spectrum Sharing Criterion Based on Capacity Conservation Ratio of Primary User,” Proc. SDR’09.
  280. Yuji Okamoto and Takeo Fujii,”Multi-cell Interference Reduction Packet Control for Improving Cell Boundary Throughput for Multi-hop Cellular System,” Proc. INCoS2009,Nov. 2009.
  281. Shamsad Parvin,Muhammad Sajjadur Rahim,Takeo Fujii,”Energy Efficient Routing Scheme for Wireless Sensor Network,” Proc. TriSAI2009,Tokyo,Japan,Oct. 2009.
  282. Hoa Tung Le,Takeo Fujii,”Information Sharing in Low-Density Traffic Area for VANET,” Proc. TriSAI2009,Tokyo,Japan,Oct. 2009.
  283. Yuji Okamoto,Takeo Fujii,”A Study of Improving the Cell Edge Throughput Performance for Cellular System with Relay Station,” Proc. TriSAI2009,Tokyo,Japan,Oct. 2009.
  284. Kensuke Fujii,Takeo Fujii,”A Study of Adaptive Relay Station and Base Station Selection on Multi-cell Cooperative Environment,” Proc. TriSAI2009,Tokyo,Japan,Oct. 2009.
  285. Souichi Tanaka,Takeo Fujii,”Development of Intelligent MAC Protocol on Autonomous Distributed Control for Cognitive Radio,” Proc. TriSAI2009,Tokyo,Japan,Oct. 2009.
  286. Chinnapat Sertthin,Takeo Fujii,Masao Nakagawa,”Multiband received signal strength fingerprint based location system,” Proc. PIMRC2009,Tokyo,Japan,Sept. 2009.
  287. Abdulrahman Al-Abbasi,Takeo Fujii,”A novel spectrum sensing method using multi-antennas without channel state information,” Proc. ISWCS2009,Siena,Italy,Sept. 2009.
  288. Mai Ohta,Takeo Fujii,Kazushi Muraoka,Masayuki Ariyoshi,”A cooperative sensing area expansion using orthogonal frequency based information collection method,” Proc. CrownCom2009,Hannover,Germany,June 2009.
  289. Souichi Tanaka,Takeo Fujii,”Wireless LAN protected distributed coginitive MAC protocol for secondary system,” Proc. Wireless ViTAE2009,Aalborg,Denmark,May 2009.
  290. Akihiro Setoyanagi,Takeo Fujii,”Traffic reduction method using hybrid ARQ for OFDM cellular relay system,” Proc. Wireless ViTAE2009,Aalborg,Denmark,May 2009.
  291. Takeo Fujii,”Dynamic subcarrier controlled TDMA/OFDM multi-hop wireless network for improving end to end throughput,Proc. WCNC2009,Budapest,Hangary,April 2009.
  292. N. Sato,T. Fujii,”A MAC protocol for multi-packet ad-Hoc wireless network utilizing multi-antenna,” Proc. IEEE CCNC 2009,Las vegas,U.S.A,Jan. 2009.
  293. K. Muraoka,M. Ariyoshi,T. Fujii,”A Novel Spectrum-Sensing Method Based on Maximum Cyclic Autocorrelation Selection for Cognitive Radio System,” Proc. DySPAN 2008,Chicago,U.S.A. Nov. 2008.
  294. K. Hasegawa,T. Fujii,K. Umebayashi,Y. Kamiya,Y. Suzuki,”SDMA Relay Method for Wireless Multihop Networks,” Proc. WPMC,Lapland,Finland,Sept. 2008. (Student paper award 受賞)
  295. Mai Ohta,Takeo Fujii,Kazushi Muraoka,Masayuki Ariyoshi,”An OFDM based sensing information exchange for cooperative sensing in cognitive radio,SDR’08,Washington D.C.,Oct. 2008.
  296. Takeo Fujii,”Hop count base high contribution node selection method for STBC cooperative relay,” TriSAI2008,Daejeon,Oct. 2008.(Best Paper Award in Regular Session)
  297. Souichi Tanaka and Takeo Fujii,”Wireless LAN protected distributed cognitive MAC protocol for secondary system,” TriSAI2008,Daejeon,Oct. 2008.
  298. Norihiko Sato and Takeo Fujii,”A MAC protocol for multi-packet ad-hoc wireless network utilizing multi-antenna,” TriSAI2008,Daejeon,Oct. 2008.
  299. Mai Ohta and Takeo Fujii,”An OFDM based sensing information exchange for cooperative sensing in cognitive radio systems,” TriSAI2008,Daejeon,Oct. 2008.
  300. Keigo Hasegawa,Takeo Fujii,Kenta Umebayashi,Yukihiro Kamiya,and Yasuo Suzuki,”SDMA relay method for wireless multihop networks” WPMC 2008,Lapland,Finland,Spet. 2008.
  301. Jia Shen and Takeo Fujii,”Two-dimensional location information exchanging method based on time and frequency slot assignment in ITS system,” APWCS 2008,Sendai,Aug. 2008.
  302. Anwida Prompijit,Takeo Fujii,Chinnapat Sertthin,Masao Nakagawa,”Frequency sharing secondary system with carrier sense assisted by cellular system,” Proc. CrownCom2008,Singapore,May 2008.
  303. Takeo Fujii,”High contribution node selection method for STBC distributed ARQ,” Proc. VTC2008-Spring,Singapore,May 2008.
  304. Hiroto Yasuda,Takeo Fujii,“High contribution node selection for cognitive radio networks,” Proc. SDR’07,Denver,Colorado,U.S.A.,Nov. 2007.
  305. Takeo Fujii,“Cognitive wireless ad-hoc networks,”AICT 2007,Beijing,China,Sept. 2007.
  306. Norihiko Sato,Takeo Fujii,“A MAC protocol for tree structure wireless mesh network utilizing multi antenna,”AICT 2007,Beijing,China,Sept. 2007.
  307. Norihiko Sato,Takeo Fujii,“Muliti Antenna Utilization Scheme for Congestion Avoidance around the Gateway for Wireless Mesh Networks,”IEEE PIMRC 2007,Athens,Greece,Sept. 2007.
  308. Hiromasa Uchiyama,Kenta Umebayashi,Takeo Fujii,Fumie Ono,Sakaguchi,Yukihiro Kamiya,Yasuo Suzuki,”Study on Cooperative Sensing in Cognitive Radio Based Ad-hoc Network,”IEEE PIMRC 2007,Athens,Greece,Sept. 2007.
  309. Takeo Fujii ,“Power limited multi-band multi-hop secondary communication system for cognitive radio network,”CROWNCOM 2007,Orlando,Florida,U.S.A.,Aug. 2007.
  310. Keigo Hasegawa,Takeo Fujii,Kenta Umebayashi,Yukihiro Kamiya,Yasuo Suzuki,“A Dialogue-based MAC Protocol for Efficient Broadcasting in Ad Hoc Networks,” IST Mobile& Wireless Communications Summit 2007,Budapest,Hugary,July 2007.
  311. Takeo Fujii ,Yasushi Yamao,“Ad-hoc wireless networks and cognitive radio toward future wireless networks,” 4G Forum 2007,London,U.K.,April. 2007.
  312. Takeo Fujii ,Yasushi Yamao,“Multi-band routing for ad-hoc cognitive radio networks,” SDR’06,Orlando,Florida,U.S.A.,Nov. 2006.
  313. Atsushi Kinoshita,Yukihiro Kamiya,Takeo Fujii,Yasuo Suzuki,“An application of the cognitive radio concept on wireless ad hoc networks based on CSMA/CA with RTS/CTS,”WPMC 2006,San Diego,U.S.A.,Sept.2006.
  314. Miho Kozuma,Yukihiro Kamiya,Takeo Fujii,Yasuo Suzuki,“BER characteristics of a novel concurrent signal processing scheme for blind synchronization and beamforming in M-ary/SS systems” WPMC 2006,San Diego,U.S.A.,Sept.2006.
  315. Md. Najmus Sadat Rahman,Yukihiro Kamiya,Takeo Fujii,Yasuo Suzuki,“A new blind synchronization and beamforming method for OFDM systems,”WPMC 2006,San Diego,U.S.A.,Sept.2006.
  316. Takeo Fujii,Yukihiro Kamiya,and Yasuo Suzuki,“Multi-band ad-hoc cognitive radio for reducing inter system interference ,”IEEE PIMRC 2006,Helsinki,Finrand,Sept. 2006.
  317. Tomofumi Sakaguchi,Yukihiro Kamiya,Takeo Fujii,Yasuo Suzuki,“Forward interference avoidance concept for MANET using adaptive array antennas,”IEEE PIMRC 2006,Helsinki,Finrand,Sept. 2006.
  318. Nguyen Tran Khoa,Takeo Fujii,Yukihiro Kamiya,and Yasuo Suzuki,“Frequency sharing hotspot communication using OFDM adaptive array antenna under uplink multi-carrier CDMA cellular system,”IEEE ISWCS’06,Valencia,Spain,Sept. 2006 (Awarded paper as Best Student Paper Award!!).
  319. Ranjith Padmasiri,Takeo Fujii,Yukihiro Kamiya,and Yasuo Suzuki,“Variable spreading method for MC/DS-CDMA road to vehicle communication system,”IEEE ISSSTA 2006,pp.113-117,Manaus,Brazil,Aug. 2006.
  320. M. Kokubu,Y. Kamiya,T. Fujii,Y. Suzuki,“A consideration on packet transmission efficiency of IVCN based on a reconfigurable adaptive array antenna,”IEEE AP-S 2006,Albuquerque,New Mexico,U.S.A.,July,2006.
  321. Takeo Fujii and Yasuo Suzuki,“Ad-hoc cognitive radio -development to frequency sharing system by using multi-hop network-,” IEEE DySPAN 2005,Baltimore,U.S.A.,pp.589-592,Nov. 2005.
  322. Takeo Fujii ,Kyesan Lee,“Band separated MC-CDMA system for down-link cellular networks,” IEEE 62nd Semiannual Vehicular Technology Conference (VTC2005-Fall),Dallas,Texas,USA,Sept. 2005.
  323. Takeo Fujii,Erina Kojima,Yukihiro Kamiya and Yasuo Suzuki,“STBC distributed ARQ with packet combining for OFDM ad-hoc communication system,”The 8th International Symposium on Wireless Personal Multimedia Communications (WPMC 2005),Aalborg,Denmark,Sept. 2005.
  324. Satoru Takano,Takeo Fujii,Yukihiro Kamiya,and Yasuo Suzuki,“RTS/CTS Systems for Ad Hoc Wireless LAN with Adaptive Array Antenna,” The 8th International Symposium on Wireless Personal Multimedia Communications (WPMC 2005),Aalborg,Denmark,Sept. 2005.
  325. Mika Ohoyama,Yukihiro Kamiya,Takeo Fujii,and Yasuo Suzuki,“A Software Antenna for Interference Suppression in DS-SS systems,” The 8th International Symposium on Wireless Personal Multimedia Communications (WPMC 2005),Aalborg,Denmark,Sept. 2005.
  326. Takeo Fujii,Yukihiro Kamiya and Yasuo Suzuki,“STBC site diversity using layered code assignment for multicarrier CDMA in multicell system,”The 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communication (PIMRC 2005),Berlin,Germany,Sept. 2005.
  327. Kei Takayama,Yukihiro Kamiya,Takeo Fujii,and Yasuo Suzuki,“A convergence acceleration technique for a blind 2D-RAKE receiver based on CMA criteria,” ISAP ‘05,Seoul,Korea,Aug. 2005.
  328. Yukihiro Kamiya,Takeo Fujii,Yasuo Suzuki,“A Novel CMA Adaptive Array Antenna Achieving Asynchronous 2D-RAKE Receiver for M-ary/SS Signals,”IEEE AP-S 2005,Washington D.C.,U.S.A.,July 2005.
  329. Kei Takayama,Yukihiro Kamiya,Takeo Fujii,Yasuo Suzuki,“A Novel CMA Adaptive Array Antenna Achieving Asynchronous 2D-RAKE Receiver for DS/SS Signals,”IEEE AP-S 2005,Washington D.C.,U.S.A.,July 2005.
  330. Erina Kojima,Takeo Fujii,Yukihiro Kamiya and Yasuo Suzuki,“Distributed ARQ using STBC for OFDM ad-hoc networks,”The 14th IST Mobile and Wireless Communications Summit,Dresden,Germany,June 2005.
  331. Takeo Fujii,Yukihiro Kamiya and Yasuo Suzuki,“STBC site diversity for multicarrier CDMA in linear cell system,”IEEE 61st Vehicular Technology Conference (VTC2005-Spring),Stockholm,Sweden,May 2005.
  332. Takeo Fujii,Yukihiro Kamiya and Yasuo Suzuki,“MMSE subcarrier combing method using multi-stage RLS for MC-CDMA transmit diversity,”The Seventh International Symposium on Wireless Personal Multimedia Communications (WPMC 2004),WM5-1,pp.V3-108-112,Abano Terme,Italy,Sept. 2004.
  333. Takeo Fujii,Yukihiro Kamiya and Yasuo Suzuki,“Multi-stage RLS subcarrier combing method for uplink quasi-synchronous MC-CDMA,”The 15th IEEE International symposium on personal,indoor and mobile radio communications (PIMRC 2004),Barcelona,Spain,Sept. 2004.
  334. Takeo Fujii,Yukihiro Kamiya and Yasuo Suzuki,“Transmit digital beam forming using two-stage weight control for MC-CDMA/DS-CDMA TDD system,”ISAP’ 04,2D4-1,pp.537-540,Sendai,Japan,Aug. 2004.
  335. Takeo Fujii and Yasuo Suzuki,“Two-dimensional RLS OFDM adaptive array antenna using signals of adjacent subcarriers,” The Sixth International Symposium on Wireless Personal Multimedia Communications (WPMC 2003),WA10-1,pp.V3-351-355,Yokosuka,Japan,Oct. 2003.
  336. Rie Kuki,Takeo Fujii and Masao Nakagawa,“Comparison between CDMA and OFDM as a Communication System for Dedicated Short Range Communication on Intelligent Transport Systems,”ISITA2002,Xian,China,Oct. 2002.
  337. Takeo Fujii and Masao Nakagawa,“Clustered assign code selecting peak power reduction for MC-CDMA,” The 13th IEEE International symposium on personal,indoor and mobile radio communications (PIMRC 2002),Lisbon,Portugal,Sept. 2002.
  338. Manabu Inoue,Takeo Fujii and Masao Nakagawa,“Space time transmit site diversity for OFDM multi base station system,” The Fourth IEEE Conference on Mobile and Wireless Communications Networks (MWCN 2002),pp.30-34,Stockholm,Sweden,Sept.,2002.
  339. Tomohiro Hiramoto,Atushi Mizuki,Masaki Shibahara,Takeo Fujii and Iwao Sasase,“Weight tracking method for OFDM adaptive array in time variant fading channel,” The Fourth IEEE Conference on Mobile and Wireless Communications Networks (MWCN 2002),pp.611-615,Stockholm,Sweden,Sept.,2002.
  340. Tomokazu Kambayashi,Takaaki Horiuchi,Masaki Shibahara,Takeo Fujii and Iwao Sasase,“OFDM/SDM system using adaptive transmit phase control to mitigate co-channel interference,IEEE VTC2002 Fall,Vancouver,Canada,Sept. 2002.
  341. Takeo Fujii and Masao Nakagawa,“Code selecting peak power reduction for MC-CDMA,” IEEE Wireless communication and networking conference (WCNC 2002),pp.482-486,Orland,U.S.A.,March 2002.
  342. Masaki Shibahara, Takeo Fujii,Toshihiko Saba and Iwao Sasase,“Performance evaluation of frequency spread coding and frequency interleaving for OFDM systems using adaptive co-channel interference canceling receiver,” European Wireless Conference 2002,Florence,Italy,Feb. 2002.
  343. Takeo Fujii,Manbu Inoue and Masao Nakagawa,“Transmit site diversity for OFDM multi-cell wireless communication network,” URSI National Radio Science Meeting 2002,Boulder,U.S.A.,p.111,Jan. 2002.
  344. Takeo Fujii and Masao Nakagawa,“Joint technique of PTS and adaptive clipping level control with filtering for OFDM peak power reduction,” The 3rd Multicarrier Spread Spectrum Workshop (MC-SS 2001),Oberpfaffenhofen,Germany,Sept. 2001.
  345. Masashige Shirakabe,Takeo Fujii and Masao Nakagawa,“Coupling interference reduction system using adaptive array antenna in SFN repeater,” The 4th International symposium on wireless personal multimedia communications (WPMC ’01),pp.1021-1025,Aalborg,Denmark,Sept. 2001.
  346. Takeo Fujii and Masao Nakagawa,“Adaptive clipping level control for OFDM peak power reduction using clipping and filtering,” The 4th International symposium on Multi-Dimensional Mobile Communications (MDMC’01),pp.393-400,Pori,Finland,June 2001.
  347. Arata Inaba,Takeo Fujii and Masao Nakagawa,“TV broadcast harmonic interference cancellation for digital wireless communication,” IEEE International conference on telecommunications (ICT 2001),pp.76-81,Bucharest,Romania,June 2001.
  348. Takeo Fujii and Masao Nakagawa,“Weighting factor estimation method for OFDM peak power reduction using partial transmit sequences,” The 4th European personal mobile communications conference (EPMCC 2001),Vienna,Austria,Feb. 2001
  349. Takeo Fujii and Masao Nakagawa,“Indoor multi base stations simultaneous transmission system using OFDM adaptive array antenna,” The 11th IEEE International symposium on personal,indoor and mobile radio communications (PIMRC 2000),pp.1241-1245,London,U.K.,Sept. 2000.
  350. Takeo Fujii and Masao Nakagawa,“Frequency sharing CDMA wireless LAN using uplink band of P-MP TDMA broadband wireless access,” The 50th IEEE Vehicular technology conference (VTC 1999-Fall),pp.1211-1216,Amsterdam,The Netherlands,Sept. 1999.
  351. Takeo Fujii,Hiroyuki Atarashi and Masao Nakagawa,“Multicarrier assignment with random pulse for high speed decentralized wireless LAN,” The 8th IEEE International Symposium on Personal,Indoor and Mobile Radio Communications (PIMRC’97),pp.1110-1114,Helsinki,Finland,Sept. 1997.