Fellows
/Senior Distinguished
Researchers
/Distinguished
Researchers

Senior Distinguished Researcher Yasushi Takatori
  • Visiting Senior Distinguished Researcher

    Yasushi Takatori

  • NTT Access Network Service Systems Laboratories

Wireless Systems, Convergence of optical and wireless access

Sophisticated electro-magnetic field control with new network topology enables creation of extreme and natural access environment. This leads to the fundamental innovation of access systems including both optical and wireless networks.

In this page

Awards

  • The 67th Maejima Hisoka Award (2022)
  • Recognition of Meritorious Award on Radio. The award of the Minister of Internal Affairs and Communications (2020)
  • ITU-AJ Accomplishment Awards (2020)
  • IEICE Best Paper Award (2020)
  • Best Paper Award of IEICE（Communications Society）(2017)
  • IEICE KIYASU-Zen'iti Award (2016)
  • IEICE Best Paper Award (2016)
  • Best Tutorial Paper Award of IEICE（Communications Society）(2015)
  • IEEE Standards Association's Outstanding Contribution Appreciation Award for the development of IEEE 802.11ac-2013 (2014)
  • IEICE Best Paper Award (2011)
  • Achievement Award of IEICE（Communications Society）(2007)
  • YRP Award (2005)
  • WPMC Best Paper Award (2004)

Academic Activities

  • Vice Chair of 802.11ah promotion council since December 2020.
  • Vice Chair of WLAN systems developing group since July 2017.
  • Secretary of IEEE Japan Chapter Awards Committee since December 2015.

Publications

Books

  1. "Introduction to New Information and Communication 3rd edition," The Telecommunications Association, 2022, (in Japanese, Co-Author)
  2. "Introduction to Private Wireless Network," RIC TELECOM, 2022, (in Japanese, Co-Author)
  3. "High Spectral Density Optical Communication Technologies," Springer, 2010, Co-Author.
  4. "Introduction to OFDM/OFDMA," (in Japanese, Co-Author)
  5. "Cooperation in Wireless Networks: Principles and Applications," (Author for Chapter 25)
  6. Handbook on Antenna Technology（in Japanese, Co-Author）
  7. "Wireless personal communications: Bluetooth and other technologies," Kluwer Academic Publishers, 2001 (II-7, Co-Author).

Papers

  1. Megumi Kaneko, T. H. L. Dinh, Kenichi Kawamura, Takatsune Moriyama and Yasushi Takatori, "Wireless Multi-Interface Connectivity with Deep Learning-Enabled User Devices: an Energy Efficiency Perspective," in IEEE Network, doi: 10.1109/MNET.123.2100766.
  2. Kenichi Kawamura, Shouta Nakayama, Keisuke Wakao, Takatsune Moriyama, and Yasushi Takatori, "Protection of latency-strict stations on WLAN systems using CTS-to-STA frames," IEICE Trans. 2022EBP3089.
  3. Tomoki Murakami, Riku Taniguchi, Tomoaki Ogawa and Yasushi Takatori, "Performance Evaluation of Uplink Multiuser MIMO-OFDM System with Single RF Chain Receiver," in IEEE Access, vol. 10, pp. 118878-118887, October 2022.
  4. Yasushi Takatori, "Wireless Technologies for Future Network Services Tailored to the Requirements of Various Users and Applications," NTT Technical Review Vol. 20, No. 9, pp. 27-33, Sept. 2022.
  5. Ramamoorthi, Yoghitha, Masashi Iwabuchi, Tomoki Murakami, Tomoaki Ogawa, and Yasushi Takatori. 2022. "Resource Allocation for Reconfigurable Intelligent Surface Assisted Dual Connectivity" Sensors 22, no. 15: 5755, August 2022.
  6. Ramamoorthi, Yoghitha, Riku Ohmiya, Masashi Iwabuchi, Tomoaki Ogawa, and Yasushi Takatori, "Resource Allocation and Sharing Methodologies When Reconfigurable Intelligent Surfaces Meet Multiple Base Stations," Sensors 22, no. 15: 5619, July 2022.
  7. Toshiro Nakahira, Koichi Ishihara, Motoharu Sasaki, Hirantha Abeysekera, Tomoki Murakami, Takatsune Moriyama, and Yasushi Takatori, "Centralized Control Method of Multi-Radio and Terminal Connection for 802.11 Wireless LAN Mixed Environment," IEICE Trans. Commun., Vol.E105-B, No.2, pp.186-195, Feb. 2022.
  8. Riku Ohmiya, Tomoki Murakami, Masaaki Nishino, Yoghitha Ramamoorthi1, Masashi Iwabuchi1, Tomoaki Ogawa1 and Yasushi Takatori, "Massive Distributed IRS Aided Wireless Communication with ON/OFF Selection," TU Journal on Future and Evolving Technologies, Volume 2 (2021), Issue 6, 23 September 2021.
  9. Toshiro Nakahira, Tomoki Murakami, Hirantha Abeysekera, Koichi Ishihara, Motoharu Sasaki, Takatsune Moriyama, and Yasushi Takatori, "Dynamic Terminal Connection Control Using Multi-Radio Unlicensed Access for 5G Evolution and Beyond," IEICE Trans. Commun., Vol. E104.B (2021), No. 9, pp. 1138-1146, September 2021.
  10. Motoharu Sasaki, Toshiro Nakahira, Takatsune Moriyama, Tomoaki Ogawa, Yusuke Asai, and Yasushi Takatori, "Multi-radio Proactive Control Technology (Cradio®): A Natural Communication Environment where Users Do Not Need to Be Aware of the Wireless Network," NTT Technical Review Vol. 19 No. 8, pp.37-45, Aug. 2021.
  11. Motoharu Sasaki, Mitsuki Nakamura, Nobuaki Kuno, Wataru Yamada, Naoki Kita, Takeshi Onizawa, Yasushi Takatori, Hiroyuki Nakamura, Minoru Inomata, Koshiro Kitao, and Tetsuro Imai, "Extension of ITU-R Site-General Path Loss Model in Urban Areas Based on Measurements from 2 to 66 GHz Bands," IEICE Trans. Commun., Jan. 2021.
  12. Kenichi Kawamura, Akiyoshi Inoki, Shouta Nakayama, Keisuke Wakao, Yasushi Takatori, "Coordinated scheduling of 802.11ax wireless LAN systems using hierarchical clustering," IEICE Trans. Commun., Vol. E104-B, No.1, pp.80-87, Jan. 2021.
  13. Tomoki Murakami, Koichi Ishihara, Hirantha Abeysekera, Yasushi Takatori, "An Actual Stadium Verification of WLAN using a Distributed Smart Antenna System (D-SAS)," IEICE Trans. Commun., issue 1, pp. 109-117, Jan. 2021.
  14. Koichi Ishihara, Yasushi Takatori, Jun Mashino, Satoshi Suyama, Yukihiko Okumura, "Experimental verification of wireless LAN with distributed smart antenna system (D-SAS) in a train environment," IEICE Commun. Express, vol. 9, No. 7, pp. 354-358, April. 2020.
  15. Kentaro Saito, Ahmad Salaam Mirfananda, Jun-ichi Takada, Mitsuki Nakamura, Wataru Yamada, Yasushi Takatori, "Joint Delay and Azimuth Estimation of Coherent Waves for Millimeter-wave Band Channel Sounding," ASEAN Engineering Journal, Vol. 10, No. 1, (2020), e-ISSN 2586-9159, Jan. 2020.
  16. Mitsuki Nakamura, Motoharu Sasaki, Wataru Yamada, Naoki Kita, Takeshi Onizawa, Yasushi Takatori, Masashi Nakatsugawa, Minoru Inomata, Koshiro Kitao, Tetsuro Imai, "Path Loss Model in Crowded Outdoor Environments Considering Multiple Human Body Shadowing of Multipath at 4.7GHz and 26.4GHz," IEICE Trans. Commun. Vol. E102-B, pp.1676-1688, August, 2019.
  17. Tomoki Murakami, Shinya Otsuki, Takafumi Hayashi, Yasushi Takatori, and Kazuo Kitamura, "Wildlife Detection System Using Wireless LAN Signals," NTT Technical Review, Vol. 17, No. 6, pp.45-48, June 2019.
  18. Masakazu Yamagishi, Takashi Hikage, Nobuaki Kuno, Mitsuki Nakamura, Wataru Yamada, and Yasushi Takatori, "An analytical Study on Estimation Method of Human Body Blockage Characteristics in 26 GHz Band In-Door Propagation Using Numerical Simulation," IEICE Trans. Vol.J102-C, No.5, pp.131-138, May 2019.
  19. Minoru Inomata, Tetsuro Imai, Koshiro Kitao, Yukihiko Okumura, Motoharu Sasaki, and Yasushi Takatori, "Radio Propagation Prediction Method Using Point Cloud Data Based on Hybrid of Ray-Tracing and Effective Roughness Model in Urban Environments," IEICE Trans. Commun. Vol. E102-B, pp. 51-62, Jan. 2019.
  20. Motoharu Sasaki, Yasushi Takatori, Wataru Yamada, Naoki Kita, Takeshi Onizawa, Kouta Sejima and Katsumi Ishii, "A Propagation Model for Propagation Paths on the Sea at SHF Bands Considering Wave Height Variation," IEICE Trans. Vol. J101-B, No. 9, pp.675-684, Sept. 2018.
  21. Sho Yoshida, Kentaro Nishimori, Soichi Ito, Tomoki Murakami, Koichi Ishihara, and Yasushi Takatori, "Dynamic Group-Based Antenna Selection for Uplink Multi-User MIMO in Distributed Antenna System," IEICE Trans. Commun. Vol. E101-B, No. 7, pp. 1552-1560, July, 2018.
  22. Tomoki Murakami, Shingo Oka, Yasushi Takatori, Masato Mizoguchi, and Fumiaki Maehara, "On the Feasibility of an Adaptive Movable Access Point System in a Static Indoor WLAN Environment," IEICE Trans. Commun. Vol. E101-B, No. 7, pp. 1693-1700, July, 2018.
  23. Tomoki Murakami, Yasushi Takatori, and Fumiaki Maehara, "A Receiving Antenna Allocation Scheme for Downlink MU-MIMO-OFDM Transmission," Electronics Journal (Switzerland), July, 2018.
  24. Koichi Ishihara, Tomoki Murakami, Hirantha Abeysekera, Mamoru Akimoto, and Yasushi Takatori, "Distributed smart antenna system for high-density WLAN system," Electronics Letters, vol. 54, issue 6, pp. 336-338, March 2018.
  25. Tomoki Murakami, Koichi Ishihara, Yasushi Takatori, Masato Mizoguchi, and Kentaro Nishimori, "CSI Feedback Reduction Method for Downlink Multiuser MIMO Transmission Using Dense Distributed Antenna Selection," IEICE Trans. Commun. Vol. E101-B, No. 2, pp. 426-433, Feb. 2018.
  26. Soichi Ito, Sho Yoshida, Kentaro Nishimori, Tomoki Murakami, Koichi Ishihara, and Yasushi Takatori, "Performance evaluation of distributed antenna in uplink MU-MIMO using amplitude information and many-to-one switch," IEICE Commun. Express, vol. 7, No. 5, pp. 154-159, Feb. 2018.
  27. Motoharu Sasaki, Minoru Inomata, Wataru Yamada, and Yasushi Takatori, "ITU-R Study Group 3 Activities towards Use of High Frequency Bands for 5G and Other Wireless Communication Systems," NTT Technical Review,Vol. 15 No. 9, pp.1-7, Sept. 2017.
  28. Tomoki Murakami, Koichi Ishihara, Hirantha Abeysekera, and Yasushi Takatori, "Wireless Policy Management System--Constrained Analog Beamforming Method--," IEICE Trans. Vol.J100-B, No. 9, pp. 826-834, Sept. 2017.
  29. Akiyoshi Inoki, Hirantha Abeysekera, Munehiro Matsui, Kenichi Kawamura, Takeo Ichikawa, Yasushi Takatori, Masato Mizoguchi, Akira Kishida, Yoshifumi Morihiro, Takahiro Asai, and Yukihiko Okumura, "Throughput improvement of mobile cooperative WLAN systems with identifying and management of starved APs/UEs for 5G," IEICE Trans. Commun. Vol. E100-B, No. 8, pp. 1366-1376, Aug. 2017.
  30. Ryuma Seno, Tomoaki Ohtsuki, Wenjie Jiang, and Yasushi Takatori, "Clustering small cells in heterogeneous networks with interference alignment," IEICE Commun. Express, vol. 6, No. 6, pp. 369-374, June 2017.
  31. Tomoki Murakami, Koichi Ishihara, Hirantha Abeysekera, and Yasushi Takatori, "Constrained Beam Selection Scheme for WLAN systems," IEICE comm. Express, vol. 6, No. 6, pp. 270-275, June 2017.
  32. Koichi Ishihara, Tomoki Murakami, Yusuke Asai, Yasushi Takatori and Masato Mizoguchi, "Cooperative Inter-cell Interference Mitigation Scheme with Downlink MU-MIMO Beamforming for Dense Wireless LAN Environment," Wireless Personal Communications, Springer, 93, pp. 661-674, April 2017.
  33. Kenichi Kawamura, Koichi Ishihara, Junichi Iwatani, Shoko Shinohara, Mamoru Akimoto, Yasuhiko Inoue, Takeo Ichikawa, and Yasushi Takatori, "New Trends in Wireless LAN and Cooperative Wireless LAN Technology," NTT Technical Review, Vol. 15 No. 3, pp. 1-7, March 2017.
  34. Tomoki Murakami, Koichi Ishihara, Hirantha Abeysekera, Yasushi Takatori, and Masato Mizoguchi, "Low complexity non-linear pre-coding on downlink multiuser MIMO systems," IEICE Commun. Express, vol. 6, No. 2, pp. 65-70, Feb. 2017.
  35. Tomoki Murakamia), Koichi Ishihara, Hirantha Abeysekera, Yasushi Takatori, and Masato Mizoguchi, "Low complexity non-linear pre-coding on downlink multiuser MIMO systems," IEICE Communications Express, Vol. 6, No. 2, pp.65-70, Feb. 2017.
  36. Fereidoun H. Panahi, Tomoaki Ohtsuki, Wenjie Jiang, Yasushi Takatori, and Tadao Nakagawa, "Joint Interference Alignment and Power Allocation for Multi-User MIMO Interference Channels Under Perfect and Imperfect CSI," in IEEE Transactions on Green Communications and Networking, vol. 1, no. 2, pp. 131-144, June 2017, doi: 10.1109/TGCN.2017.2694061.
  37. Ryuma Seno, Tomoaki Ohtsuki, Wenjie Jiang, and Yasushi Takatori, "low-complexity cell clustering algorithm in dense small cell networks," EURASIP Journal on Wireless Communications and Networking, Nov. 2016.
  38. Hayato Fukuzono, Tomoki Murakami, Riichi Kudo, Yasushi Takatori, Masato Mizoguchi, and Masahiro Morikura, "An Experimental Study of Simultaneous Transmission from Multiple Access Points with Implicit Feedback," IEICE Trans., Vol.J99-B, No. 9, pp. 705-723, Sept. 2016.
  39. Yasushi Takatori, Yusuke Asai, and Yasuhiko Inoue, "MIMO Technologies in Wireless LAN Systems," The Journal of The Institute of Image Information and Television Engineers, Vol. 70, Issue 1, pp. 35-40, Jan. 2016.
  40. Riichi Kudo, B. A. Hirantha Sithira Abeysekera, Yusuke Asai, Takeo Ichikawa, Yasushi Takatori, and Masato Mizoguchi, "User Equipment Centric Downlink Access in Unlicensed Spectrum for Heterogeneous Mobile Network," IEICE Trans. Commun., Vol.E98-B, No.10, pp.1969-1977, Oct. 2015.
  41. Yoshinori Sakata, Tomoki Murakami, Yasushi Takatori, Masato Mizoguchi, and Fumiaki Maehara, "Simple resource allocation scheme for heterogeneous traffic in MU-MIMO-OFDMA systems," IEICE Trans., Vol. J98-B, No. 7, pp. 707-716, July 2015.
  42. Hayato Fukuzono, Tomoki Murakami, Riichi Kudo, Yasushi Takatori, and Masato Mizoguchi, "Weighted-combining Calibration on Multiuser MIMO Systems with Implicit Feedback." IEICE Trans. Commun., Vol. E98-B, No.4, pp.701-713, April 2015.
  43. Koichi Ishihara, Tomoki Murakami, Yusuke Asai, Yasushi Takatori and Masato Mizoguchi, "Cooperative Inter-cell Interference Mitigation Scheme with Downlink MU-MIMO Beamforming for Dense Wireless LAN Environment," Wireless Personal Communications, 93 (3), pp. 661-674, Dec. 2014.
  44. Riichi Kudo, Yasushi Takatori, B. A. Hirantha Sithira Abeysekera, Yasuhiko Inoue, Atsushi Murase, Akira Yamada, Hiroto Yasuda, and Yukihiko Okumura, "An advanced Wi-Fi data service platform coupled with a cellular network for future wireless access," in IEEE Communications Magazine, vol. 52, no. 11, pp. 46-53, Nov. 2014, doi: 10.1109/MCOM.2014.6957142.
  45. Tomoki Murakami, Yasushi Takatori, Masato Mizoguchi, and Fumiaki Maehara "A cross-layer switching of OFDMA and MU-MIMO for future WLAN systems," IEICE Commun. Express, Vol. 3, No. 9, pp. 263-268, Sept. 2014.
  46. Tomoki Murakami, Riichi Kudo, Yasushi Takatori, Masato Mizoguchi, and Fumiaki Maehara, "AP Coordinated Multi-User MIMO for Stations with Multi-Antenna," IEICE Trans. Vol. J97-B, No. 7, pp. 515-524, July 2014.
  47. Yusuke Asai, Koichi Ishihara, Tomoki Murakami, Riichi Kudo, Takeo Ichikawa, Yasushi Takatori, and Masato Mizoguchi, "Overview of Very High Throughput Wireless LAN Standard IEEE 802.11ac and Experimental Evaluation of Multiuser-MIMO Transmission," IEICE Trans. Vol. J97-B, No. 1, pp. 1-18, Jan. 2014.
  48. Shuta Uwano, Atsuya Ando, Tomohiro Seki, Yasushi Takatori, and Takefumi Hiraguri, "Experimental Investigations of Cochannel Interference Reduction Effect at High Elevation Base Station Using Beam Tilt and Orthogonal Polarization," International Journal of Antennas and Propagation, Vol. 2014 (2014), pp. 1-12, Jan. 2014.
  49. Yusuke Asai, Yasuhiko Inoue, and Yasushi Takatori, "IEEE 802.11 Wireless LAN Standardization Trends," NTT Tech. Review, vol. 11, No. 10, Oct. 2013.
  50. Koichi Ishihara, Yusuke Asai, Riichi Kudo, Takeo Ichikawa, Yasushi Takatori and Masato Mizoguchi, "Development and experimental validation of downlink multiuser MIMO-OFDM in gigabit wireless LAN systems," EURASIP Journal on Advances in Signal Processing, June 2013.
  51. Takeo Ichikawa, Koichi Ishihara, Tomoki Murakami, B. A. Hirantha Sithira Abeysekera, Yusuke Asai, Yasushi Takatori, and Masato Mizoguchi, "High-speed wireless LAN for broadband wireless home networks," NTT Technical Review, vol. 11, no. 3, March 2013.
  52. Yasushi Takatori, Masato Mizoguchi, Kazuhiro Uehara, Shuichi Yoshino, Mitsuru Harada, and Kazuyasu Okada, "Current status, issues, and future perspectives of wireless home networks," NTT Technical Review, vol. 11, no. 3, pp. 1-5, March 2013.
  53. Tomoki Murakami, Hayato Fukuzono, Yasushi Takatori, and Masato Mizoguchi, "Multiuser MIMO with implicit channel feedback in massive antenna systems," IEICE Commun. Express, Vol. 2, No. 8, pp. 336-342, Feb. 2013.
  54. Naoki Honma, Kentaro Nishimori, Riichi Kudo, Yasushi Takatori, and Masato Mizoguchi, "Fast Control Method of Parasitic Antennas Using Noniterative Algorithm in Multiantenna System," in IEEE Transactions on Antennas and Propagation, vol. 60, no. 4, pp. 2044-2051, April 2012, doi: 10.1109/TAP.2012.2186217.
  55. Munehiro Matsui, Riichi Kudo, Yasushi Takatori, Tadao Nakagawa, Koichi Ishihara, Masato Mizoguchi, Takayuki Kobayashi, and Yutaka Miyamoto, "A Band-Divided Receiver Prototype for Wideband Optical Signals," IEICE Trans. on Communications, Vol.E94-B No.7, pp.1801-1808, July 2011.
  56. Naoki Honma, Kentaro Nishimori, Riichi Kudo, Yasushi Takatori, Takefumi Hiraguri, and Masato Mizoguchi, "A Stochastic Approach to Design MIMO Antenna with Parasitic Elements Based on Propagation Characteristics," IEICE Trans. Commun., Vol. E93-B, No. 10, pp. 2578-2585, Oct. 2010.
  57. Yasushi Takatori and Kentaro Nishimori, "Application of Downlink Multiuser MIMO Transmission Technology to Next Generation Very High Throughput Wireless Access Systems," IEICE Trans. Vol. J93-B, No.9, pp.1127-1139, Sept. 2010.
  58. Kengo Nagata, Yasuyoshi Kojima, Takefumi Hiraguri, and Yasushi Takatori, "Wireless local area network standardization of IEEE802.11 and the Wi-Fi alliance," NTT Technical Review, vol. 8, no. 4, April 2010.
  59. Riichi Kudo, Yasushi Takatori, Kentaro Nishimori, Takeo Ichikawa, Tomoki Murakami, Masato Mizoguchi, and Masahiro Morikura, "Spatial Domain Resource Sharing for Overlapping Cells in Indoor Environment," International Journal of Digital Multimedia Broadcasting Vol. 2010, Article ID 642542, March 2010.
  60. Kentaro Nishimori, Riichi Kudo, Naoki Honma, Yasushi Takatori, and Masato Mizoguchi, "16X16 MIMO Testbed for MU-MIMO Downlink Transmission," IEICE Trans. Commun., Vol. E93-B, No. 2, pp. 345-352, Feb. 2010.
  61. Koichi Ishihara, Takayuki Kobayashi, Riichi Kudo, Yasushi Takatori, Akihide Sano, and Yutaka Miyamoto, "Frequency-Domain Equalization for Coherent Optical Single-Carrier Transmission Systems," IEICE Trans. Commun., vol. E92-B, no. 12, pp. 3736-3743, Dec. 2009.
  62. Motohiro Tanabe, Masahiro Umehira, Koichi Ishihara, and Yasushi Takatori, "A Novel Dynamic Channel Access Scheme Using Overlap FFT Filter-Bank for Cognitive Radio," IEICE Trans. on Communications, vol. E92-B, no. 12, pp. 3589-3596, Dec. 2009.
  63. Akihide Sano, Eiichi Yamada, Hiroji Masuda, Etsushi Yamazaki, Takayuki Kobayashi, Eiji Yoshida, Yutaka Miyamoto, Riichi Kudo, Koichi Ishihara, and Yasushi Takatori, "No-Guard-Interval Coherent Optical OFDM for 100-Gb/s Long-Haul WDM Transmission," in Journal of Lightwave Technology, vol. 27, no. 16, pp. 3705-3713, Aug.15, 2009, doi: 10.1109/JLT.2009.2023369.
  64. Riichi Kudo, Takayuki Kobayashi, Koichi Ishihara, Yasushi Takatori, Akihide Sano, and Yutaka Miyamoto, "Coherent Optical Single Carrier Transmission Using Overlap Frequency Domain Equalization for Long-Haul Optical Systems," in Journal of Lightwave Technology, vol. 27, no. 16, pp. 3721-3728, Aug.15, 2009, doi: 10.1109/JLT.2009.2024091.
  65. Riichi Kudo, Yasushi Takatori, Kentaro Nishimori, Atsushi Ohta, Shuji Kubota, and Masato Mizoguchi, "A New User Selection Measure in Block Diagonalization Algorithm for Multiuser MIMO Systems," IEICE Trans. Commun., vol. E92-B, no. 10, pp. 3206-3218, July 2009.
  66. Koichi Ishihara, Yasushi Takatori, Shuji Kubota, and Fumiyuki Adachi, "Multiuser Detection for Asynchronous Broadband Single-Carrier Transmission Systems," in IEEE Transactions on Vehicular Technology, vol. 58, no. 6, pp. 3066-3071, July 2009, doi: 10.1109/TVT.2009.2012716.
  67. Kentaro Nishimori, Riichi Kudo, Yasushi Takatori, and Masato Mizoguchi, "1 Gbit/s data transmission using multiuser MIMO testbed in indoor office environment," NTT Technical Journal, vol.21, no.6, pp.56-59, June 2009.
  68. Etsushi Yamazaki, Hiroji Masuda, Akihide Sano, Toshihide Yoshimatsu, Takayuki Kobayashi, Eiji Yoshida, Yutaka Miyamoto, Riichi Kudo, Koichi Ishihara, Munehiro Matsui, and Yasushi Takatori, "Multi-staged nonlinear compensation in coherent receiver for 12,015 km WDM transmission of 10-ch x 111 Gbit/s no-guard-interval co-OFDM," Electronics Letter, vol. 45, issue 13, pp. 695-697, June 2009.
  69. Koichi Ishihara, Yasushi Takatori, Kentaro Nishimori, and Kazuyasu Okada, "Overlap Frequency-Domain Multiuser Detection for Asynchronous Uplink Multiuser MIMO-OFDM Systems," IEICE Trans. Commun., vol. E92-B, no. 5, pp. 1582-1588, May 2009.
  70. Riichi Kudo, Takayuki Kobayashi, Koichi Ishihara, Yasushi Takatori, Akihide Sano, Eiichi Yamada, Hiroji Masuda, Yutaka Miyamoto, and Masato Mizoguchi, "Single carrier transmission with two-stage overlap frequency domain equalization for long-haul optical systems," Electronics Letter, vol. 45, issue 3, pp. 180-182, Jan. 2009.
  71. Riichi Kudo, Takayuki Kobayashi, Koichi Ishihara, Yasushi Takatori, Akihide Sano, Eiichi Yamada, Hiroji Masuda, and Yutaka Miyamoto, "PMD compensation in optical coherent single carrier transmission using frequency-domain equalization," Electronics Letter, vol. 45, issue 2, pp.124-125, Jan. 2009.
  72. Koichi Ishihara, Takayuki Kobayashi, Riichi Kudo, Yasushi Takatori, Akihide Sano, Eiichi Yamada, Hiroji Masuda, Munehiro Matsui, Masato Mizoguchi, and Yutaka Miyamoto, "Frequency-domain equalization without guard interval for optical transmission systems," Electronics Letter, vol.44, issue 26, pp. 1480-1482, Dec. 2008.
  73. Eiichi Yamada, Akihide Sano, Hiroji Masuda, Etsushi Yamazaki, Takayuki Kobayashi, Eiji Yoshida, Kazushige Yonenaga, Yutaka Miyamoto, Koichi Ishihara, Yasushi Takatori, Takashi Yamada, and Hiroshi Yamazaki, "1 Tbit/s (111 Gbit/s/ch X 10 ch) no-guard-interval CO-OFDM transmission over 2100 km DSF," Electronics Letter, vol. 44, issue 24, pp. 1417-1418, Nov. 2008.
  74. Koichi Ishihara, Takayuki Kobayashi, Riichi Kudo, Yasushi Takatori, Akihide Sano, Eiichi Yamada, Hiroji Masuda, and Yutaka Miyamoto, "Frequency-domain equalisation for optical transmission systems," Electronics Letter, vol. 44, issue 14, pp. 870-871, July 2008, doi: 10.1049/el:20081234.
  75. Naoki Honma, Riichi Kudo, Kentaro Nishimori, Yasushi Takatori, Atsushi Ohta, and Shuji Kubota, "Antenna Selection Method for Terminal Antennas Employing Orthogonal Polarizations and Patterns in Outdoor Multiuser MIMO System," IEICE Trans. Commun., vol. E91-B, no. 6, pp. 1752-1759, June 2008.
  76. Kentaro Nishimori, Hiroyuki Yomo, Petar Popovski, Yasushi Takatori, Ramjee Prasad, and Shuji Kubota, "Interference Cancellation and Avoidance for Secondary Users Co-existing with TDD-based Primary Systems," Springer Wireless Personal Communications (2008), pp.403-421, Feb. 2008.
  77. Hiroyuki Yomo, Kentaro Nishimori, Petar Popovski, Yasushi Takatori, Ramjee Prasad, and Shuji Kubota, "Interference Exploitation for Cognitive Radios," NTT Technical Review, vol.5, no. 10, pp. 1-10, Oct. 2007.
  78. Riichi Kudo, Yasushi Takatori, Kentaro Nishimori, Atsushi Ohta, and Shuji Kubota, "New Downlink Beamforming Method for Cooperative Multiple Access Point Systems," IEICE Trans. Commun., vol. E90-B, no. 6, pp. 2303-2311, Sept. 2007.
  79. Yasushi Takatori, Riichi Kudo, Atsushi Ohta, Koichi Ishihara, Kentaro Nishimori, and Shuji Kubota, "New Robust Beamforming Method for Frequency Offsets in Uplink Multiuser OFDM-MIMO," IEICE Trans. Commun., vol. E90-B, no. 9, pp. 2312-2320, Sept. 2007.
  80. Koichi Ishihara, Yasushi Takatori, Shuji Kubota, and Masahiro Umehira, "Comparison of SCFDE and OFDM with adaptive modulation and coding in nonlinear fading channel," Electronics Letter, vol. 43, issue 3, pp. 174-175, Feb. 2007, doi: 10.1049/el:20073715.
  81. Riichi Kudo, Yasushi Takatori, Kentaro Nishimori, and Koichi Tsunekawa, "Novel Downlink Beamforming Method Using Selective STBC with Common Eigenvectors for MIMO-OFDM Systems," IEICE Trans. on Communications, vol. E89-B, no. 8, pp. 2170-2179, Aug. 2006.
  82. Yasushi Takatori, Frank H. P. Fitzek, Koichi Tsunekawa and Ramjee Prasad, "Channel Capacity of TDD-OFDM-MIMO for Multiple Access Points in a Wireless Single-Frequency-Network," Wireless Personal Commun., vol. 35, no. 1, pp. 19-33, Nov. 2005.
  83. Kentaro Nishimori, Riichi Kudo, Yasushi Takatori, and Koichi Tsunekawa, "Experimental Evaluation of 8x4 Eigenmode SDM Transmission in Broadband MIMO-OFDM Systems," NTT Technical Review, vol.3 no.9, pp.50-59, Sept. 2005
  84. Yasushi Takatori, Riichi Kudo, Kentaro Nishimori, and Koichi Tsunekawa, "Beamforming Method for Broadband MIMO-OFDM Systems," NTT Technical Review, vol.3, no. 9, pp.42-49, Sept. 2005.
  85. Kentaro Nishimori, Nobuhiko Tachikawa, Yasushi Takatori, Riichi Kudo, and Koichi Tsunekawa, "Frequency Correlation Characteristics Due to Antenna Configurations in Broadband MIMO Transmission," IEICE Trans. Commun., vol. E87-B, no. 9, pp. 2438-2445, June 2005.
  86. Yasushi Takatori, Keizo Cho, Toshikazu Hori, and Koichi Tsunekawa, "New Beam-forming Algorithm Controlling Pattern of Multiple Smart Antennas for Cellular Systems," IEICE Trans. Vol.J87-B No.9 pp.1203-1210, Sept. 2004.
  87. Yasushi Takatori, Keizo Cho, and Toshikazu Hori, "SDMA beam forming using multiple eigenvector beams and special transmission power control," IEICE Trans. Vol. J86-B, No.9, pp.1941-1949, Sept. 2003.
  88. Keizo Cho, Yasushi Takatori, Kentaro Nishimori, and Hideki Mizuno, "Fundamental Techniques and Future Trends in Smart Antenna Technology," NTTR&D, vol.51, no.6, pp.437-446, June 2002.
  89. Yasushi Takatori, Keizo Cho, and Hideki Mizuno, "Development of Smart Antennas for High Speed Wireless Systems," NTT R&D, vol.51, no.6, pp.462-468, June. 2002.
  90. Keizo Cho, Kentaro Nishimori, Yasushi Takatori, and Toshikazu Hori, "Key techniques realizing smart antenna hardware for microcell communication systems." Wireless Personal Communications, vol. 592. pp. 77-87, Springer, doi: 10.1007/0-306-46986-3_8.
  91. Kentaro Nishimori, Keizo Cho, Yasushi Takatori and Toshikazu Hori, "Automatic calibration method using transmitting signals of an adaptive array for TDD systems." in IEEE Transactions on Vehicular Technology, vol. 50, no. 6, pp. 1636-1640, Nov. 2001, doi: 10.1109/25.966592.
  92. Kentaro Nishimori, Keizo Cho, Yasushi Takatori, and Toshikazu Hori, "A Novel Configuration for Realizing Automatic Calibration of Adaptive Array Using Dispersed SPDT Switches for TDD Systems," IEICE Trans. Commun. Vol. E84-B, No.9, pp.2516-2522, Sep. 2001.
  93. Kentaro Nishimori, Keizo Cho, Yasushi Takatori, and Toshikazu Hori, "Adaptive Array for Reducing High-Power CCI on Asynchronous TDD systems," IEICE Trans. Commun., Vol. E84-B, No.7 pp.1727-1734, July 2001.
  94. Kentaro Nishimori, Keizo Cho, Yasushi Takatori, and Toshikazu Hori, "Two Base Station Configuration Using an Adaptive Array at Elevated Locations for Microcell Systems", IEICE Trans. Commun., Vol. E83-B, No.8, pp.1688-1696, Aug. 2000.
  95. Yasushi Takatori, Keizo Cho, Kentaro Nishimori, and Toshikazu Hori, "Adaptive Array Employing Eigenvector Beam of Maximum Eigenvalue and Fractionally-Spaced TDL with Real Tap," IEICE Trans. Commun., vol. E83B, No. 8, pp. 1678 - 1687, Aug. 2000.
  96. Kazuhiro Uehara, Yasushi Takatori and Kenichi Kagoshima, "Proposal for a novel beam combination method for indoor high-speed wireless communication systems," in IEEE Transactions on Vehicular Technology, vol. 48, no. 5, pp. 1511-1517, Sept. 1999, doi: 10.1109/25.790526.
  97. Kenichi Kagoshima, Kazuhiro Uehara, Yasushi Takatori, Toshikazu Hori, and Keizo Cho, "Broadband Wireless Access System Antennas: Concepts and Designs," Broadband Wireless Communications. Springer, pp. 149-161, doi: 10.1007/978-1-4471-1570-0_15.

Conference Papers

  1. Taniguchi, T. Murakami, M. Inomata, T. Ogawa and Y. Takatori, "Scale-model based MIMO Shannon capacity estimation using visible light," 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI), pp. 1926-1927, July 2022.
  2. H. L. Dinh, M. Kaneko, K. Kawamura, T. Moriyama and Y. Takatori, "Improving Reliability by Risk-Averse Reinforcement Learning over Sub6GHz/mmWave Integrated Networks," ICC 2022 - IEEE International Conference on Communications, pp. 3178-3183, May 2022.
  3. H. L. Dinh, M. Kaneko, K. Wakao, K. Kawamura, T. Moriyama and Y. Takatori, "Towards an Energy-Efficient DQN-based User Association in Sub6GHz/mmWave Integrated Networks," 2021 17th International Conference on Mobility, Sensing and Networking (MSN), 2021, pp. 645-652, doi: 10.1109/MSN53354.2021.00098.
  4. T.H.L. Dinh, M. Kaneko, K. Wakao, K. Kawamura, T. Moriyama, H. Abeysekera, and Y. Takatori, "Deep Reinforcement Learning-based User Association in Sub6GHz/mmWave Integrated Networks," 2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC), 2021, pp. 1-7, doi: 10.1109/CCNC49032.2021.9369600.
  5. N. Kuno, W. Yamada, M. Inomata, M. Sasaki, Y. Asai and Y. Takatori, "Evaluation of Characteristics for NN and CNN in Path Loss Prediction," 2020 International Symposium on Antennas and Propagation (ISAP), 2021, pp. 61-62, doi: 10.23919/ISAP47053.2021.9391493.
  6. T. Murakami, S. Otsuki, T. Ogawa and Y. Takatori, "A Study of an Environment Recognition Scheme Using WLAN CSI for Dynamic Spectrum Sharing," 2020 14th European Conference on Antennas and Propagation (EuCAP), 2020, pp. 1-4, doi: 10.23919/EuCAP48036.2020.9136090.
  7. R. Ohmiya, T. Murakami, K. Ishihara, T. Hayashi and Y. Takatori, "Interference Suppression by Selecting Full Duplex Passive Relays for Spectrum Sharing System," 2019 IEEE Asia-Pacific Microwave Conference (APMC), 2019, pp. 381-383, doi: 10.1109/APMC46564.2019.9038204..
  8. T. H. L. Dinh, M. Kaneko, K. Wakao, H. Abeysekera and Y. Takatori, "Reinforcement Learning-Aided Distributed User-to-Access Points Association in Interfering Networks," 2019 IEEE Global Communications Conference (GLOBECOM), 2019, pp. 1-6, doi: 10.1109/GLOBECOM38437.2019.9013897.
  9. S. Yamashita, H. Suganuma, T. Murakami, Y. Takatori, and F. Maehara, "Centralized Resource Allocation Method for Multiuser MIMO Capable Wireless LANs," 2019 22nd International Symposium on Wireless Personal Multimedia Communications (WPMC), 2019, pp. 1-5, doi: 10.1109/WPMC48795.2019.9096141.
  10. K. Wakao, H. Abeysekera, K. Kawamura and Y. Takatori, "Light Weight Wireless Resource Allocation Method with Distributed Architecture and DB Search Algorithm for High Density Wireless Access Systems," 2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall), 2019, pp. 1-5, doi: 10.1109/VTCFall.2019.8891145.
  11. M. Minowa, H. Seki, Y. Okumura, S. Suyama, J. Terada, S. Shigematsu, Y. Takatori, H. Asano, Y. Hirano, Y. Yamao, F.adachi, and M. Nakazawa, "5G R&D Activities for High Capacity Technologies with Ultra High-Density Multi-Band and Multi-Access Layered Cells," 2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring), 2019, pp. 1-5, doi: 10.1109/VTCSpring.2019.8746622.
  12. K. Kawamura, A. Inoki, S. Nakayama, K. Wakao and Y. Takatori, "Cooperative control of 802.11ax access parameters in high density wireless LAN systems," 2019 IEEE Wireless Communications and Networking Conference (WCNC), 2019, pp. 1-6, doi: 10.1109/WCNC.2019.8885425.
  13. M. Nakamura, M. Sasaki, W. Yamada and Y. Takatori, "Path Loss Model in Crowded Indoor Environments Considering Multiple Human Body Shadowing of Multipath at 4.7 GHz and 66.5 GHz," 2019 13th European Conference on Antennas and Propagation (EuCAP), 2019, pp. 1-5.
  14. N. KUNO, W. YAMADA, M. SASAKI and Y. TAKATORI, "Convolutional Neural Network for Prediction Method of Path Loss Characteristics considering Diffraction and Reflection in an Open-Square Environment," 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC), 2019, pp. 1-3, doi: 10.23919/URSIAP-RASC.2019.8738299.
  15. M. Ozawa, T. Ohtsuki, F. H. Panahi, W. Jiang, Y. Takatori and T. Nakagawa, "A Low-Complexity High-Accuracy AR Based Channel Prediction Method for Interference Alignment," 2018 IEEE Global Communications Conference (GLOBECOM), 2018, pp. 1-7, doi: 10.1109/GLOCOM.2018.8647292.
  16. N. Kuno and Y. Takatori, "Prediction Method by Deep-Learning for Path Loss Characteristics in an Open-Square Environment," 2018 International Symposium on Antennas and Propagation (ISAP), 2018, pp. 1-2.
  17. M. Nakamura, M. Sasaki and Y. Takatori, "Human Body Shadowing at 26.4 and 66.5 GHz in an Indoor Environment," 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2018, pp. 757-758, doi: 10.1109/APUSNCURSINRSM.2018.8609042.
  18. M. Inomata, T. Imai, K. Kitao, Y. Okumura, S. Motoharu and Y. Takatori, "Radio propagation prediction for high frequency bands using hybrid method of ray-tracing and ER model with point cloud of urban environments," 12th European Conference on Antennas and Propagation (EuCAP 2018), 2018, pp. 1-5, doi: 10.1049/cp.2018.0382.
  19. M. Sasaki, M. Nakamura, W. Yamada, N. Kita, Y. Takatori, M. Inomta, K. Kitao, and T. Imai, "Path loss characteristics from 2 to 66 GHz in urban macrocell environments based on analysis using ITU-R site-general models," 12th European Conference on Antennas and Propagation (EuCAP 2018), 2018, pp. 1-5, doi: 10.1049/cp.2018.0726.
  20. M. Yamagishi, T. Hikage, M. Sasaki, M. Nakamura and Y. Takatori, "FDTD-Based Numerical Estimation of Human Body Blockage Characteristics in 26GHz Band Indoor Propagation," 2018 48th European Microwave Conference (EuMC), 2018, pp. 878-881, doi: 10.23919/EuMC.2018.8541783.
  21. A. Inoki, H. Abeysekera, A. Kishida, Y. Morihiro, T. Asai, M. Matsui, K. Kawamura, Y. Okumura, and Y. Takatori, "Experimental Evaluation of Starved AP Identification and Management Schemes in Mobile Cooperative WLAN System toward 5G," 2018 IEEE 87th Vehicular Technology Conference (VTC Spring), 2018, pp. 1-5, doi: 10.1109/VTCSpring.2018.8417607.
  22. M. Inomata, T. Imai, K. Kitao, Y. Okumura, M. Sasaki and Y. Takatori, "Prediction accuracy of hybrid method based on ray-tracing and effective roughness model in indoor environment for millimeter waves," 2017 IEEE Conference on Antenna Measurements & Applications (CAMA), 2017, pp. 44-46, doi: 10.1109/CAMA.2017.8273471.
  23. M. Nakamura, M. Sasaki, N. Kita and Y. Takatori, "Path loss model in crowded areas considering multiple human blockage at 4.7 and 26.4 GHz," 2017 IEEE Conference on Antenna Measurements & Applications (CAMA), 2017, pp. 40-43, doi: 10.1109/CAMA.2017.8273463.
  24. M. Sasaki, M. Nakamura, M. Inomata, W. Yamada, N. Kita, Y. Takatori, K. Kitao, and T. Imai, "Frequency dependence of site-specific path loss in urban macro cell environments between 2 and 66 GHz bands," 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2017, pp. 1-5, doi: 10.1109/PIMRC.2017.8292495.
  25. H. Echigo, T. Ohtsuki, W. Jiang and Y. Takatori, "Fair Pilot Assignment Based on AOA and Pathloss with Location Information in Massive MIMO," GLOBECOM 2017 - 2017 IEEE Global Communications Conference, 2017, pp. 1-6, doi: 10.1109/GLOCOM.2017.8254813.
  26. M. Sasaki, M. Nakamura, M. Inomata, W. Yamada, N. Kita, K. Kitao, T. Imai, and Y. Takatori, "Frequency Dependence of Path Loss with Wide Dynamic Range in Urban Macro Cells between 2 and 26 GHz," 2017 IEEE Globecom Workshops (GC Wkshps), 2017, pp. 1-6, doi: 10.1109/GLOCOMW.2017.8269041.
  27. M. Inomata, M. Sasaki, M. Nakamura and Y. Takatori, "Diffuse scattering prediction for 26GHz band in indoor office environments," 2017 International Symposium on Antennas and Propagation (ISAP), 2017, pp. 1-2, doi: 10.1109/ISANP.2017.8228808.
  28. M. Nakamura, M. Sasaki, M. Inomata and Y. Takatori, "Path-loss prediction considering human-body shadowing of multi-path components in crowded area at 4.7 and 26.4 GHz," 2017 International Symposium on Antennas and Propagation (ISAP), 2017, pp. 1-2, doi: 10.1109/ISANP.2017.8228751.
  29. M. Sasaki, M. Nakamura, M. Inomata, Y. Takatori, K. Kitao and T. Imai, "Path loss frequency dependence at 2-26 GHz in an urban macro cell environment," 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2017, pp. 601-602, doi: 10.1109/APUSNCURSINRSM.2017.8072343.
  30. A. Inoki, H. Abeysekera, M. Matsui, T. Ichikawa, Y. Takatori, M. Mizoguchi, A. Kishida, A. Yamada, Y. Morihiro, T. Asai, and Y. Okumura, "Starved wireless LAN device identifying scheme using beacon signals," 2016 19th International Symposium on Wireless Personal Multimedia Communications (WPMC), 2016, pp. 459-463.
  31. M. Inomata, M. Sasaki, W. Yamada, Y. Takatori, K. Kitao and T. Imai, "Effects of building shapes on path loss up to 37 GHz band in street microcell environments," 2017 IEEE International Conference on Computational Electromagnetics (ICCEM), 2017, pp. 249-251, doi: 10.1109/COMPEM.2017.7912782.
  32. S. Oka, T. Murakami, Y. Takatori, M. Mizoguchi and F. Maehara, "Performance of adaptive movable access point system in the presence of positioning error," 2017 IEEE Radio and Wireless Symposium (RWS), 2017, pp. 150-152, doi: 10.1109/RWS.2017.7885972.
  33. F. H. Panahi, T. Ohtsuki, W. Jiang, Y. Takatori and K. Uehara, "Joint Interference Alignment and Power Allocation under Perfect and Imperfect CSI," 2016 IEEE Global Communications Conference (GLOBECOM), 2016, pp. 1-7, doi: 10.1109/GLOCOM.2016.7841926.
  34. S. Yoshida, K. Nishimori, T. Murakami, K. Ishihara, Y. Takatori and M. Mizoguchi, "Experimental evaluation on uplink MU-MIMO using high-density distributed antennas selection," 2016 International Symposium on Antennas and Propagation (ISAP), 2016, pp. 330-331.
  35. T. Murakami, K. Ujihara, Y. Takatori, M. Mizoguchi and F. Maehara, "Downlink multiuser MIMO-OFDM transmission using simple receive antenna selection," 2016 International Symposium on Antennas and Propagation (ISAP), 2016, pp. 604-605.
  36. R. Nagashima, T. Ohtsuki, W. Jiang, Y. Takatori and T. Nakagawa, "Channel prediction for massive MIMO with channel compression based on principal component analysis," 2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2016, pp. 1-6, doi: 10.1109/PIMRC.2016.7794949.
  37. F. H. Panahi, T. Ohtsuki, W. Jiang, Y. Takatori and K. Uehara, "Interference alignment and power allocation for multi-user MIMO interference channels," 2016 IEEE International Conference on Communications (ICC), 2016, pp. 1-7, doi: 10.1109/ICC.2016.7510851.
  38. 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," 2015 IEEE Global Communications Conference (GLOBECOM), 2015, pp. 1-6, doi: 10.1109/GLOCOM.2015.7417322.
  39. R. Seno, T. Ohtsuki, W. Jiang and Y. Takatori, "Complexity reduction of pico cell clustering for interference alignment in heterogeneous networks," 2015 21st Asia-Pacific Conference on Communications (APCC), 2015, pp. 267-271, doi: 10.1109/APCC.2015.7412523.
  40. R. Seno, T. Ohtsuki, W. Jiang and Y. Takatori, "Interference Alignment in Heterogeneous Networks Using Pico Cell Clustering," 2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall), 2015, pp. 1-5, doi: 10.1109/VTCFall.2015.7390989.
  41. F. H. Panahi, T. Ohtsuki, W. Jiang and Y. Takatori, "Interference alignment for multi-user MIMO interference channels via a Riemannian optimization approach," 2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2015, pp. 287-292, doi: 10.1109/PIMRC.2015.7343311.
  42. T. Murakami, Y. Takatori, M. Mizoguchi and F. Maehara, "Antenna decision method for downlink multiuser MIMO systems with receive antenna allocation," 2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2015, pp. 304-305, doi: 10.1109/APS.2015.7304538.
  43. R. Kudo, A. Hirantha, Y. Takatori, T. Ichikawa, M. Mizoguchi, H. Yasuda, A. Yamada, and Y. Okumura, "Channel Access Acquisition Mechanism Coupled with Cellular Network for Unlicensed Spectrum," 2015 IEEE 81st Vehicular Technology Conference (VTC Spring), 2015, pp. 1-5, doi: 10.1109/VTCSpring.2015.7145734.
  44. T. Nakahira, K. Ishihara, Y. Asai, Y. Takatori, R. Kudo and M. Mizoguchi, "Centralized control of carrier sense threshold and channel bandwidth in high-density WLANs," 2014 Asia-Pacific Microwave Conference, 2014, pp. 570-572.
  45. Y. Sakata, T. Murakami, Y. Takatori, M. Mizoguchi and F. Maehara, "Simple resource allocation scheme for heterogeneous traffic in MU-MIMO-OFDMA systems," The 20th Asia-Pacific Conference on Communication (APCC2014), 2014, pp. 189-193, doi: 10.1109/APCC.2014.7091630.
  46. H. Fukuzono, T. Murakami, R. Kudo, S. Shinohara, Y. Takatori and M. Mizoguchi, "Combining calibration schemes on a real-time multiuser MIMO-OFDM system with implicit feedback," 2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC), 2014, pp. 11-15, doi: 10.1109/PIMRC.2014.7136123.
  47. H. Fukuzono, T. Murakami, R. Kudo, Y. Takatori and M. Mizoguchi, "Weighted-combining calibration for implicit feedback beamforming on downlink multiuser MIMO systems," 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2013, pp. 846-850, doi: 10.1109/PIMRC.2013.6666254.
  48. R. Kudo, Y. Takatori, T. Murakami and M. Mizoguchi, "User Selection for Multiuser MIMO Systems Based on Block Diagonalization in Wide-Range SNR Environment," 2011 IEEE International Conference on Communications (ICC), 2011, pp. 1-5, doi: 10.1109/icc.2011.5963515.
  49. T. Nakagawa, K. Ishihara, T. Kobayashi, R. Kudo, M. Matsui, Y. Takatori, and M. Mizoguchi, "Wide-range and fast-tracking frequency offset estimator for optical coherent receivers," 36th European Conference and Exhibition on Optical Communication, 2010, pp. 1-3, doi: 10.1109/ECOC.2010.5621111.
  50. W. Yamada, K. Nishimori, Y. Takatori, and Y. Asai, "Statistical Analysis and Characterization of Doppler Spectrum in Large Office Environment," 2009 International Symposium on Antennas and Propagation (ISAP), 2009, pp. 564-567, doi: 10.34385/proc.51.2D3-5.
  51. T. Murakami, N. Honma, K. Nishimori, R. Kudo, Y. Takatori and M. Mizoguchi, "Multi site MIMO channel analysis at 4.85GHz in outdoor environment," 2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications, 2009, pp. 3005-3009, doi: 10.1109/PIMRC.2009.5450214.
  52. R. Kudo, T. Kobayashi, E. Yamazaki, A. Sano, E. Yoshida, K. Ishihara, Y. Takatori, M. Matsui, T. Nakagawa, M. Mizoguchi, and Y. Miyamoto, "111Gb/s No-guard-interval OFDM using low sampling rate analogue-to-digital converter," 2009 35th European Conference on Optical Communication, 2009, pp. 1-2.
  53. A. Sano, Y. Takatori and Y. Miyamoto, "No-guard-interval coherent optical OFDM for 100-Gb/s/ch long-haul transmission systems," 2009 Conference on Optical Fiber Communication, 2009, pp. 1-3, doi: 10.1364/OFC.2009.OTuO3.
  54. R. Kudo, T. Kobayashi, K. Ishihara, Y. Takatori, A. Sano, E. Yamada, H. Masuda, Y. Miyamoto, and M. Mizoguchi, "Two-stage overlap frequency domain equalization for long-haul optical systems," 2009 Conference on Optical Fiber Communication, 2009, pp. 1-3, doi: 10.1364/OFC.2009.OMT3.
  55. T. Kobayashi, E. Yamazaki, E. Yamada, H. Masuda, A. Sano, E. Yoshida, Y. Miyamoto, K. Ishihara, R. Kudo, Y. Takatori, and M. Mizoguchi, "Ultra long-haul transmission over 6,000 km of 100 Gb/s serial signal by using coherent detection," 2009 Conference on Optical Fiber Communication, 2009, pp. 1-3, doi: 10.1364/OFC.2009.OWW4.
  56. Y. Takatori, K. Nishimori, K. Ishihara, and R. Kudo, "Multiuser MIMO Technology," Microwave Workshops and Exhibition 2018, Nov. 2008.
  57. K. Ishihara, T. Kobayashi, R. Kudo, Y. Takatori, A. Sano, E. Yamada, H. Masuda, and Y. Miyamoto, "Coherent optical transmission with frequency-domain equalization," 2008 34th European Conference on Optical Communication, 2008, pp. 1-2, doi: 10.1109/ECOC.2008.4729320.
  58. A. Sano, E. Yamada, H. Masuda, E. Yamazaki, T. Kobayashi, E. Yoshida, Y. Miyamoto, S. Matsuoka, R. Kudo, K. Ishihara, Y. Takatori, M. Mizoguchi, K. Okada, K. Hagimoto, H. Yamazaki, S. Kamei, and H. Ishii, "13.4-Tb/s (134 × 111-Gb/s/ch) no-guard-interval coherent OFDM transmission over 3,600 km of SMF with 19-ps average PMD," 2008 34th European Conference on Optical Communication, 2008, pp. 1-2, doi: 10.1109/ECOC.2008.4729569.
  59. Y. Takatori, "Multiuser MIMO-OFDM R&D in NTT," Proc. the 11th International Symposium on Wireless Personal Multimedia Communications (WPMC2008), Lapland, Finland, 8-11 Sept. 2008.
  60. K. Nishimori, R. Kudo, N. Honma, Y. Takatori, A. Ohta, and K. Okada, "Experimental evaluation using 16 × 16 multiuser MIMO testbed in an actual indoor scenario," 2008 IEEE Antennas and Propagation Society International Symposium, 2008, pp. 1-4, doi: 10.1109/APS.2008.4619160.
  61. N. Honma, K. Nishimori, R. Kudo, Y. Takatori, and K. Okada, "Using MIMO approach to get out of many iterations in analog adaptive beamforming," 2008 IEEE Antennas and Propagation Society International Symposium, 2008, pp. 1-4, doi: 10.1109/APS.2008.4619403.
  62. E. Yamada, A. Sano, H. Masuda, E. Yamazaki, T. Kobayashi, E. Yoshida, K. Yonenaga, Y. Miyamoto, K. Ishihara, Y. Takatori, T. Yamada, H. Yamazaki, "1Tb/s (111Gb/s/ch × 10ch) no-guard-interval CO-OFDM transmission over 2100 km DSF," OECC/ACOFT 2008 - Joint Conference of the Opto-Electronics and Communications Conference and the Australian Conference on Optical Fibre Technology, 2008, pp. 1-2, doi: 10.1109/OECCACOFT.2008.4610321.
  63. K. Ishihara, Y. Takatori, K. Nishimori and K. Okada, "Multiuser Detection Method Robust against Timing Offset for OFDM Uplink Transmission," VTC Spring 2008 - IEEE Vehicular Technology Conference, 2008, pp. 1463-1467, doi: 10.1109/VETECS.2008.344.
  64. K. Nishimori, H. Yomo, P. Popovski, Y. Takatori, R. Prasad and S. Kubota, "Distributed Interference Cancellation for Dynamic Spectrum Sharing," 2008 IEEE International Conference on Communications, 2008, pp. 3044-3049, doi: 10.1109/ICC.2008.573.
  65. E. Yamada, A. Sano, H. Masuda, T. Kobayashi, E. Yoshida, Y. Miyamoto, Y. Hibino, K. Ishihara, Y. Takatori, K. Okada, K. Hagimoto, T. Yamada, and and H. Yamazaki, "Novel no-guard-interval PDM CO-OFDM transmission in 4.1 Tb/s (50 88.8-Gb/s) DWDM link over 800 km SMF including 50-GHz spaced ROADM nodes," 2008 Conference on Optical Fiber Communication (OFC), 2008, PDP8.
  66. K. Nishimori, Y. Takatori, R. Kudo, N. Honma, A. Ohta, and K. Okada, "Experimental Results Using Developed MU-MIMO Testbed," Wireless Signal Processing & Networking Workshop: Wireless MIMO Technology, Sendai, January 2008.
  67. Y. Takatori, K. Nishimori, N. Honma, R. Kudo, K. Ishihara, T. Yamada, A. Ohta, and K. Okada, "Core Technologies in MU-MIMO," Wireless Signal Processing & Networking Workshop: Wireless MIMO Technology, Sendai, January 2008.
  68. N. Honma, K. Nishimori, Y. Takatori, A. Ohta and S. Kubota, "Compact and Low-Profile MIMO Terminal Antenna Employing Bidirectional Yagi-Uda Array," The Second European Conference on Antennas and Propagation, EuCAP 2007, 2007, pp. 1-6, doi: 10.1049/ic.2007.0997.
  69. K. Nishimori, K. Riichi, Y. Takatori, A. Ohta and S. Kubota, "Cooperative Interference Cancellation for Multiuser Transmission," The Second European Conference on Antennas and Propagation, EuCAP 2007, 2007, pp. 1-6, doi: 10.1049/ic.2007.1327.
  70. R. Kudo, Y. Takatori, K. Nishimori, A. Ohta and S. Kubota, "User Selection Method for Block Diagonalization in Multiuser MIMO Systems," IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference, 2007, pp. 3295-3300, doi: 10.1109/GLOCOM.2007.625.
  71. K. Ishihara, Y. Takatori and S. Kubota, "Multiuser Detection Method for Single-Carrier Transmission in Uplink Multiuser MIMO Access," 2007 IEEE 66th Vehicular Technology Conference, 2007, pp. 566-570, doi: 10.1109/VETECF.2007.129.
  72. A. Sano, H. Masuda, E. Yoshida, T. Kobayashi, E. Yamada, Y. Miyamoto, F. Inuzuka, Y. Takatori, K. Hagimoto, T. Yamada, and Y. Sakamaki, "30 x 100-Gb/s all-optical OFDM transmission over 1300 km SMF with 10 ROADM nodes," 33rd European Conference and Exhibition of Optical Communication - Post-Deadline Papers (published 2008), 2007, pp. 1-2.
  73. Y. Takatori, K. Ishihara, R. Kudo, A. Ohta, K. Nishimori, and S. Kubota, "Robust Beamforming Method for Asynchronous Uplink Multiuser MIMO-OFDM Systems," Workshop on Personal Mobile Communications 2007 (WPMC'2007), Jaipur India, Dec. 2007.
  74. R. Kudo, Y. Takatori, J. Wenjie, K. Nishimori, A. Ohta, and S. Kubota, "Low Complexity Capacity Estimation Method for Multiuser Block Diagonalization Transmission," 2007 International Symposium on Antennas and Propagation (ISAP), 2007, pp. 1358-1361, doi: 10.34385/proc.13.4C3-5.
  75. T. Yamada, W. Jiang, Y. Takatori, R. Kudo, A. Ohta, and S. Kubota, "Enhanced Simplified Maximum Likelihood Detection (ES-MLD) in Multiuser MIMO Downlink in Time-Variant Environment," 2007 International Symposium on Antennas and Propagation (ISAP), 2007, pp. 1346-1349, doi: 10.34385/proc.13.4C3-2.
  76. N. Honma, R. Kudo, K. Nishimori, Y. Takatori, A. Ohta, and S. Kubota, "Proposal of Antenna Selection Method for Terminal Antenna with Orthogonal Polarizations and Patterns for Outdoor Multiuser MIMO System," 2007 International Symposium on Antennas and Propagation (ISAP), 2007, pp. 1318-1321, doi: 10.34385/proc.13.4C1-4.
  77. Y. Takatori, K. Ishihara, R. Kudo, A. Ohta and S. Kubota, "New Beamforming Method Robust against Timing Offset in Multiuser MIMO-OFDM Systems," 2007 International Symposium on Antennas and Propagation (ISAP), 2007, pp. 732-735, doi: 10.34385/proc.13.3C2-2.
  78. N. Honma, K. Nishimori, Y. Takatori, A. Ohta and S. Kubota, "Proposal of compact MIMO terminal antenna employing Yagi-Uda array with common director elements," 2007 IEEE Antennas and Propagation Society International Symposium, 2007, pp. 2405-2408, doi: 10.1109/APS.2007.4396017.
  79. K. Nishimori, R. Di. Taranto, H. Yomo, P. Popovski, and Y. Takatori, "Spatial Opportunity for Cognitive Radio Systems with Heterogeneous Path Loss Conditions," 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring, 2007, pp. 2631-2635, doi: 10.1109/VETECS.2007.541.
  80. R. Kudo, Y. Takatori, A. Ohta, K. Nishimori and S. Kubota, "New Simple Capacity Estimation Method for Multiuser Block Diagonalization Transmission," 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring, 2007, pp. 1836-1840, doi: 10.1109/VETECS.2007.381.
  81. R. Di Taranto, K. Nishimori, P. Popovski, H. Yomo, Y. Takatori, R. Prasad, and S. Kubota, "Simple Antenna Pattern Switching and Interference-Induced Multi-Hop Transmissions for Cognitive Radio Networks," 2007 2nd IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2007, pp. 543-546, doi: 10.1109/DYSPAN.2007.77.
  82. N. Honma, R. Kudo, K. Nishimori, Y. Takatori, A. Ohta, and S. Kubota, "Effectiveness of Terminal Antennas Employing Orthogonal Polarizations and Patterns in Outdoor Multiuser MIMO System," ITG/IEEE Workshop on Smart Antenna (WSA 2007), pp.5325-5330, 2007.
  83. K. Nishimori, R. Kudo, Y. Takatori, A. Ohta, and S. Kubota, "Multiuser OFDM-MIMO Effect with Fair Resource Allocation in Actual Indoor Multipath Environment," ITG/IEEE Workshop on Smart Antenna (WSA 2007), pp.5331-5336, 2007.
  84. T. Yamada, W. Jiang, Y. Takatori, R. Kudo, A. Ohta, and S. Kubota, "Enhanced simplified maximum likelihood detection (ES-MLD) in multiuser MIMO downlink in time-variant environment," ITG/IEEE Workshop on Smart Antenna (WSA 2007), pp.5411-5416, 2007.
  85. Y. Takatori, R. Kudo, K. Ishihara, A. Ohta, and S. Kubota, "Multiuser Detection Method Robust Against Frequency Offsets in Uplink OFDM-MIMO," ITG/IEEE Workshop on Smart Antenna (WSA 2007), pp.5345-5351, 2007.
  86. N. Honma, K. Nishimori, Y. Takatori, A. Ohta, and K. Tsunekawa, "Antenna selection method employing orthogonal polarization and radiation patterns for MIMO antenna, " 2006 First European Conference on Antennas and Propagation, 2006, pp. 1-4, doi: 10.1109/EUCAP.2006.4584668.
  87. R. Kudo, Y. Takatori, A. Ohta, K. Nishimori, and S. Kubota, "On Downlink Space Division Multiplexing in Partial Cooperation Multiple Access Point Systems," 2006 International Symposium on Antennas and Propagation (ISAP), 2006, pp. 1-5, doi: 10.34385/proc.34.3A2a-2.
  88. Y. Takatori, R. Kudo, A. Ohta, K. Ishihara, K. Nishimori, and S. Kubota, "Robust Beamforming Method for Frequency Offsets in Uplink Multiuser OFDM-MIMO," 2006 International Symposium on Antennas and Propagation (ISAP), 2006, pp. 1-5, doi: 10.34385/proc.34.3A2a-5.
  89. K. Nishimori, E. Bottega, H. Yomo, P. Popovski, Y. Takatori, R. Prasad, and S. Kubota, "Spatial Availability for the Cognitive Radio System with Directional Interference," In Proceedings of the 9th International Symposium on Wireless Personal Multimedia Communications WPMC.
  90. Y. Takatori, A. Ohta, N. Honma, R. Kudo, K. Nishimori, and S. Kubota, "New Downlink Beamforming Method for Multiuser MIMO with Fair Resource Allocation in Microcell Systems," In Proceedings of the 9th International Symposium on Wireless Personal Multimedia Communications WPMC.
  91. K. Nishimori, R. Kudo, Y. Takatori, A. Ohta and K. Tsunekawa, "Performance Evaluation of 8×8 Multi-User MIMO-OFDM Testbed in an Actual Indoor Environment," 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, 2006, pp. 1-5, doi: 10.1109/PIMRC.2006.253924.
  92. Y. Takatori, A. Ohta, N. Honma, R. Kudo, K. Nishimori, and S. Kubota, "Downlink beamforming method for multiuser MIMO with fair resource allocation in microcell systems," 2006 Korea-Japan AP/EMCJ/EMT Joint Conference (KJJC-AP/EMCJ/EMT'06), 2006.
  93. N. Honma, K. Nishimori, Y. Takatori, A. Ohta and K. Tsunekawa, "Proposal of compact three-port MIMO antenna employing modified inverted F antenna and notch antennas," 2006 IEEE Antennas and Propagation Society International Symposium, 2006, pp. 2613-2616, doi: 10.1109/APS.2006.1711136.
  94. R. Kudo, K. Nishimori, Y. Takatori and K. Tsunekawa, "Experimental Evaluation of Eigenvector Beamforming Method with 8X4 MIMO-OFDM Testbed," 2006 IEEE 63rd Vehicular Technology Conference, 2006, pp. 2216-2220, doi: 10.1109/VETECS.2006.1683250.
  95. T. K. Madsen, F. H.P. Fitzek, Y. Takatori, and R. Prasad, "Performance of IP Header Compression over Correlated Multiple Channels," In Proceedings of the International Symposium on Wireless Personal Multimedia Communications 2005 (WPMC 2005).
  96. Y. Takatori, R. Kudoh, K. Nishimori, and K. Tsunekawa, "Novel Beamforming Method to Spatial Division Multiplex Single Carrier and Multi-Carrier Transmission Modes," In Proceedings of the International Symposium on Wireless Personal Multimedia Communications 2005 (WPMC 2005).
  97. K. Nishimori, R. Kudo, N. Honma, Y. Takatori, and K. Tsunekawa, "Key Technologies Actualizing Broadband MIMO-OFDM Hardware," 2005 International Symposium on Antennas and Propagation (ISAP), pp.23-26, 2005, doi: 10.34385/proc.33.1A2-1.
  98. K. Tsunekawa, K. Nishimori, R. Kudo, Y. Takatori and N. Tachikawa, "Beamforming and antenna design techniques for realizing wideband MIMO-OFDM system," 2005 IEEE Antennas and Propagation Society International Symposium, 2005, pp. 329-332 vol. 2A, doi: 10.1109/APS.2005.1551807.
  99. T. K. Madsen, F. H.P. Fitzek, Y. Takatori, R. Prasad, and M. Katz, "Zero-AIC Header Compression with Multiple Description Coding for 4G Wireless Networks," International Workshop on Convergent Technology (IWCT), May 2005.
  100. T. K. Madsen, F. H.P. Fitzek, Y. Takatori, R. Prasad, and M. Katz, "Cooperative IP Header Compression using Multiple Access Points in 4G Wireless Networks," 14th IST Mobile and Wireless Communications Summit, June 2005.
  101. Y. Takatori, K. Tsuneksawa, F. H. P. Fitzek, and R. Prasad, "On the Exploitation of Multiple Access Points in a Wireless SFN Using TDD-OFDM-MIMO Techniques," Proceedings of the 7th Conference on Wireless Personal Multimedia Communications (WPMC). 2004.
  102. K. Nishimori, Y. Takatori, R. Kudo, N. Tachikawa and K. Tsunekawa, "Novel MIMO-SDMA configuration adopting directivity and polarization control," 2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754), 2004, pp. 2745-2749 Vol.4, doi: 10.1109/PIMRC.2004.1368819.
  103. K. Nishimori, Y. Takatori, R. Kudo, N. Tachikawa, and K. Tsunekawa, "MIMO-SDMA Configuration Using Directivety and Polarization Control for Multi-Rate Broadband Wireless Systems," 2004 International Symposium on Antennas and Propagation (ISAP), pp.337-340, 2004, doi: 10.34385/proc.12.2A4-2.
  104. N. Tachikawa, K. Nishimori, Y. Takatori, and K. Tsunekawa, "Frequency Correlation Characteristics for Broadband MIMO Systems in Indoor NLOS Propagation Environment," 2004 International Symposium on Antennas and Propagation (ISAP), pp.309-312, 2004, doi: 10.34385/proc.12.2A3-1.
  105. R. Kudo, Y. Takatori, K. Nishimori, N. Tachikawa, and K. Tsunekawa, "Downlink Beamforming Method for Multipath Fading Environments in Broadband SDM Systems," 2004 International Symposium on Antennas and Propagation (ISAP), pp.349-352, 2004, doi: 10.34385/proc.12.2A4-5.
  106. Y. Takatori and K. Cho, "Downlink Beamforming Method for MIMO-SDMA Using STBC for Multipath Fading environments," 2002 International Symposium on Antennas and Propagation (ISAP), 2002, doi: 10.34385/proc.10.1A3-3.
  107. T. Nishimura, Y. Takatori, T. Ohgane, Y. Ogawa and K. Cho, "Transmit nullforming for a MIMO/SDMA downlink with receive antenna selection," Proceedings IEEE 56th Vehicular Technology Conference, 2002, pp. 190-194 vol.1, doi: 10.1109/VETECF.2002.1040330.
  108. K. Cho, Y. Takatori, K. Komiya, K. Nishimori and H. Mizuno, "Novel smart antennas for applying SDMA to cellular mobile communication systems," IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2002, pp. 652-655 vol.4, doi: 10.1109/APS.2002.1017068.
  109. Y. Takatori, K. Cho and T. Hori, "Smart antenna testbed for SDMA systems using STBC," Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367), 2002, pp. 1364-1368 vol.3, doi: 10.1109/VTC.2002.1002839.
  110. Y. Takatori, K. Cho and T. Hori, "Downlink beam-forming method using STBC for mobile propagation environments," Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367), 2002, pp. 1916-1920 vol.4, doi: 10.1109/VTC.2002.1002956.
  111. K. Cho, Y. Takatori, K. Nishimori and T. Hori, "Optimum element arrangement of adaptive arrays for SDMA considering angular spread and Doppler effect," IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229), 2001, pp. 6-9 vol.4, doi: 10.1109/APS.2001.959387.
  112. N. Tachikawa, Y. Takatori, K. Cho, and T. Hori, "Optimum beam tilt of terminal antenna for indoor wireless communication systems," 2001 Korea-Japan Joint Conference (KJJC)-AP 2001, Taejon, Korea, pp.31-34, Sept. 2001.
  113. K. Cho, Y. Takatori, K. Nishimori and T. Hori, "Smart Antenna Systems with Simultaneous Pattern Control of Multiple Base Stations," ISSSE'01:2001 URSI International Symposium on Signals, Systems, and Electronics, Tokyo, Japan. (2001).
  114. Y. Takatori, K. Cho and T. Hori, "New beam-forming algorithm controlling pattern of multiple smart antennas for cellular systems," 2000 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.00EX380), 2000, pp. 175-178, doi: 10.1109/APWC.2000.900170.
  115. K. Cho, Y. Takatori, K. Nishimori and T. Hori, "Optimum element arrangement of adaptive base station antennas for SDMA in circular cell," Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152), 2000, pp. 150-156 vol.1, doi: 10.1109/VETECF.2000.886646.
  116. K. Nishimori, K. Cho, Y. Takatori, and T. Hori, "Automatic Calibration Method of Adaptive Array Considering Antenna Characteristics for FDD Systems," 2000 International Symposium on Antennas and Propagation (ISAP), Vol. 2, pp.910-913, 2000, doi: 10.34385/proc.9.3C4-5.
  117. Y. Takatori, K. Cho, K. Nishimori and T. Hori, "Smart Antenna for SDMA Using Multiple Eigenvector Beams," 2000 International Symposium on Antennas and Propagation (ISAP), Vol. 4, pp.1481-1484, 2000, doi: 10.34385/proc.9.4A3-3.
  118. T. Hori, K. Cho, Y. Takatori and K. Nishimori, "Key techniques for actualizing smart antenna hardware," IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C, 2000, pp. 948-951 vol.2, doi: 10.1109/APS.2000.875376.
  119. K. Nishimori, K. Cho, Y. Takatori and T. Hori, "Automatic calibration method of adaptive array for FDD systems," IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C, 2000, pp. 910-913 vol.2, doi: 10.1109/APS.2000.875367.
  120. K. Cho, K. Nishimori, Y. Takatori, and T. Hori, "Key Techniques Realizing Smart Antenna Hardware for Microcell Communication Systems," Proc. of Virginia Tech. Symposium, Blacksburg, VA, pp.8-9-99, June 2000.
  121. K. Nishimori, K. Cho, Y. Takatori and T. Hori, "High-power CCI reduction performance of adaptive array for asynchronous TDMA systems," VTC2000-Spring. 2000 IEEE 51st Vehicular Technology Conference Proceedings (Cat. No.00CH37026), 2000, pp. 360-364 vol.1, doi: 10.1109/VETECS.2000.851479.
  122. Y. Takatori, K. Cho, K. Nishimori, and T. Hori, "Novel Adaptive Array Antenna for High-Speed Wireless Access in a Severe Multipath Environment," Proc. of AP2000, Davos, Swiss, Session 5A5, April 2000.
  123. K. Nishimori, K. Cho, Y. Takatori, and T. Hori, "Interference Reduction Characteristics of Two Base Stations Placed at High Locations Using Adaptive Arrays for Microcell Environment," Proc. of PIMRC '99, Osaka, Japan, pp. 812-816, Sept. 1999.
  124. Y. Takatori, K. Cho, K. Nishimori, and T. Hori, "Improving Transmission Performance Using Smart Antennas for High-Speed Wireless Access Systems," Proc. of PIMRC '99, Osaka, Japan, pp. 716-720, Sept. 1999.
  125. K. Cho, K. Nishimori, Y. Takatori and T. Hori, "Adaptive base station antennas with additional switching element for SDMA systems," Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324), 1999, pp. 1929-1933 vol.3, doi: 10.1109/VETECF.1999.801733.
  126. K. Nishimori, K. Cho, Y. Takatori and T. Hori, "A new calibration method of adaptive array for TDD systems," IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010), 1999, pp. 1444-1447 vol.2, doi: 10.1109/APS.1999.789586.
  127. K. Cho, K. Nishimori, Y. Takatori and T. Hori, "Adaptive antennas employing vertical pattern control for street microcell," IEEE Antennas and Propagation Society International Symposium. 1998 Digest. Antennas: Gateways to the Global Network. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.98CH36, 1998, pp. 639-642 vol.2, doi: 10.1109/APS.1998.702019.
  128. Y. Takatori, K. Uehara and K. Kagoshima, "Miniaturization of base station antennas by using adaptive antenna technique for indoor high-speed wireless communication systems," VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151), 1998, pp. 480-484 vol.1, doi: 10.1109/VETEC.1998.686620.

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