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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| RCS | 2013-04-19 13:00 |
Okinawa | Ishigaki City Hall | A Transmission Power Control Method by Interference Power Estimation in Shared Frequency Bands Atsushi Ikeda, Shigeru Tomisato (Okayama Univ.), Hiromasa Fujii (NTTDOCOMO), Masaharu Hata (Okayama Univ.)  RCS2013-19 |
This paper evaluates interference power reduction effect with the proposed transmission power control (TPC) method for l... [more] | RCS2013-19 pp.101-106 |
| SR | 2013-01-25 10:20 |
Nagano | Shinshu Univ. | An interference power estimation method for low-priority systems in spectrum sharing systems Atsushi Ikeda, Shigeru Tomisato (Okayama Univ.), Hiromasa Fujii (NTTDOCOMO), Masaharu Hata (Okayama Univ.) SR2012-77 |
This paper proposes a new transmission power control method for low-priority systems by the accurate estimation of inter... [more] | SR2012-77 pp.33-38 |
| SAT, RCS (Joint) |
2012-08-30 11:30 |
Kochi | Kochi City Cultura-Plaza CUL-PORT | Transmission Performance Improvement by Non-Linear Distortion Noise Control in Spectrum Sharing Seiichiro Okamoto, Shigeru Tomisato (Okayama Univ.), Hiromasa Fujii (NTTDOCOMO), Masaharu Hata (Okayama Univ.), Shunji Miura, Hidetoshi Kayama (NTTDOCOMO) RCS2012-101 |
On spectrum sharing systems, transmission power control (TPC) effectively works to avoid harmful inter-system interferen... [more] | RCS2012-101 pp.31-36 |
| SR | 2012-07-26 13:25 |
Kagoshima | Yakushima (an island in Kagoshima pref.) | A Proposed Application of Cognitive Radio Technique towards the Usage of White Space in Public Cellular Systems and its Evaluation Results obtained form an Indoor Test-Bed Hiromasa Fujii, Shunji Miura, Hidetoshi Kayama (NTT DOCOMO) SR2012-18 |
[more] | SR2012-18 pp.7-14 |
| SR | 2012-01-26 16:05 |
Kagoshima | Kagoshima | [Panel Discussion]
Possible applications of cognitive radio techniques to the next generation cellular communication systems Hiromasa Fujii, Hiroki Harada, Shunji Miura, Hidetoshi Kayama (NTT DOCOMO) SR2011-84 |
[more] | SR2011-84 pp.43-50 |
| NS, RCS (Joint) |
2011-12-16 15:05 |
Yamaguchi | Yamaguchi University | Non-Linear Distortion Noise Control for Spectrum Sharing Systems Seiichiro Okamoto, Shigeru Tomisato (Okayama Univ.), Hiromasa Fujii (NTTDOCOMO), Masaharu Hata (Okayama Univ.), Shunji Miura, Hidetoshi Kayama (NTTDOCOMO) RCS2011-260 |
Recently, a spectrum sharing method between wireless communication systems has been studied to use frequency resources w... [more] | RCS2011-260 pp.165-170 |
| SR | 2011-04-22 09:55 |
Shimane | Matsue Terrsa | Achievable Capacity of Cognitive Radio Systems Coexisting with a Macro Cellular System Hiromasa Fujii, Hiroki Harada, Shunji Miura, Hidetoshi Kayama (NTT DOCOMO) SR2011-9 |
[more] | SR2011-9 pp.53-58 |
| SR | 2011-04-22 10:20 |
Shimane | Matsue Terrsa | A Study on Spectrum Sharing between Systems Using 3D Area Model
-- Improvement of Evaluation Method and Comparison with a Method Based on 2DArea Model -- Hiroto Yasuda, Hiromasa Fujii, Shunji Miura, Hidetoshi Kayama (NTT DOCOMO) SR2011-10 |
In this paper, we propose a simulation method for system level evaluation based on 3-dimensional area model when an macr... [more] | SR2011-10 pp.59-64 |
| RCS, MoNA, SR (Joint) |
2011-03-02 13:40 |
Kanagawa | YRP | A Signal Recognition Technique based on Cyclostationarity and its Application to Cognitive Radio Systems Hiroki Harada, Hiromasa Fujii, Shunji Miura, Hidetoshi Kayama (NTT DOCOMO) SR2010-90 |
This paper introduces a signal recognition technique based on cyclostationarity and proposes its application to cognitiv... [more] | SR2010-90 pp.17-22 |
| SR | 2011-01-27 13:25 |
Fukuoka | Kyushu Institute of Technology | Experimental Evaluation of Cyclostationarity-Based Multiple Signal Identification Method by using Spatial Channel Emulator Hiroki Harada, Hiromasa Fujii, Shunji Miura, Hidetoshi Kayama, Yoshiki Okano, Tetsuro Imai (NTT DOCOMO) SR2010-70 |
The problem with conventional cyclostationarity-based feature detection is that the detection probability of weak sign... [more] |
SR2010-70 pp.7-12 |
| NS, RCS (Joint) |
2010-12-17 16:10 |
Okayama | Okayama Univ. | Interference Properties of OFDMA Systems under Spectrum Sharing Environment Yuichiro Fukuda, Shigeru Tomisato (Okayama Univ.), Hiromasa Fujii (NTT DOCOMO), Masaharu Hata (Okayama Univ.), Shunji Miura (NTT DOCOMO) RCS2010-198 |
This paper evaluates interference reduction effects by transmission power control (TPC) under spectrum sharing environme... [more] | RCS2010-198 pp.233-238 |
| AN, USN, SR, RCS (Joint) |
2010-10-29 12:00 |
Osaka | Osaka University | Achievable Capacity of Cognitive Radio Systems Coexisting with a Macro Cellular System Hiromasa Fujii, Shunji Miura, Tomoyuki Ohya (NTT DOCOMO) SR2010-68 |
[more] | SR2010-68 pp.199-204 |
| SR | 2010-07-29 13:00 |
Kyoto | ATR (Kyoto) | Experimental Evaluation of Multiple Signal Identification based on Cyclostationarity in Spectrum Sharing Scenarios Hiroki Harada, Hiromasa Fujii, Shunji Miura, Tomoyuki Ohya (NTT DOCOMO) SR2010-16 |
The problem of conventional cyclostationarity-based feature detection is that the detection probability of weak signals ... [more] | SR2010-16 pp.1-6 |
| RCS, AN, MoNA, SR (Joint) |
2010-03-04 11:50 |
Kanagawa | YRP | Extensions of Linear Constraint Adaptive Array and Zero Forcing for Spectrum Sharing Environments Hiromasa Fujii, Takahiro Asai, Tomoyuki Ohya (NTT DOCOMO) RCS2009-292 |
[more] | RCS2009-292 pp.197-202 |
| SR | 2010-01-22 10:40 |
Tokyo | Univ. of Electro-Communications | Iterative Cyclostationarity-based Feature Detection of Multiple Primary Signals for Spectrum Sharing Scenarios Hiroki Harada, Hiromasa Fujii, Shunji Miura, Tatsuo Furuno, Tomoyuki Ohya (NTT DOCOMO, INC.) SR2009-84 |
The original cyclostationarity cannot distinguish signals if several signals have the same signal format and parameters,... [more] | SR2009-84 pp.65-72 |
| RCS, SIP | 2010-01-21 16:00 |
Fukuoka | Kyushu Univ. | Optimum Weighting for Adaptive Array Antennas under Spectrum Sharing Environments Hiromasa Fujii, Takahiro Asai, Tomoyuki Ohya (NTT DOCOMO) SIP2009-98 RCS2009-232 |
[more] | SIP2009-98 RCS2009-232 pp.145-150 |
| RCS, SAT (Joint) |
2009-12-18 14:50 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Spectrum Properties of DFTS-OFDM Transmission with Nonlinear Distortion Yuichiro Fukuda, Shigeru Tomisato, Masaharu Hata (Okayama Univ.), Hiromasa Fujii, Takahiro Asai, Yukihiko Okumura (NTTDOCOMO) RCS2009-195 |
This paper evaluates spectrum property of DFTS-OFDM transmission with non-linear distortion of a transmission power ampl... [more] | RCS2009-195 pp.167-172 |
| SR, AN, USN (Joint) |
2009-10-22 10:00 |
Miyagi | Tohoku Univ. | AM-PM Characteristics of Low Noise Block Converters Hiromasa Fujii, Takahiro Asai, Yukihiko Okumura (NTT DOCOMO), Ryoko Kawauchi, Ikuo Hiradate, Hayato Akazawa, Takayuki Sotoyama (Panasonic Mobile Communications) SR2009-52 |
[more] | SR2009-52 pp.7-12 |
| SR, AN, USN (Joint) |
2009-10-22 10:20 |
Miyagi | Tohoku Univ. | Capacity Achievable by Spectrum Sharing with Adaptive Transmit Power Control: Based on Field Measurements Hiromasa Fujii, Takahiro Asai, Yukihiko Okumura (NTT DOCOMO,), Ryoko Kawauchi, Ikuo Hiradate, Hayato Akazawa, Takayuki Sotoyama (Panasonic Mobile Communications) SR2009-53 |
[more] | SR2009-53 pp.13-19 |
| RCS | 2009-06-25 13:40 |
Aichi | Nagoya University | Out-of-band distortion power reduction by soft-clipping for wireless OFDMA systems Toshihisa Fujiwara, Shigeru Tomisato, Masaharu Hata (Okayama Univ.), Hiromasa Fujii, Takahiro Asai, Yukihiko Okumura (NTTDOCOMO) RCS2009-29 |
This paper proposes an adaptive control method for soft clipping which is one of effective peak power reduction methods ... [more] | RCS2009-29 pp.13-16 |
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