IEICE Trans

Shuji KUBOTA

A New User Selection Measure in Block Diagonalization Algorithm for Multiuser MIMO Systems Riichi KUDO Yasushi TAKATORI Kentaro NISHIMORI Atsushi OHTA Shuji KUBOTA Masato MIZOGUCHI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2009/10/01 Vol. E92-B No. 10 pp. 3206-3218 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: multiuser MIMO, user selection, block diagonalization, channel capacity,
	Summary \| Full Text:PDF(2.1MB)

Tree Based Approximate Optimal Signal Detectors for MIMO Spatial Multiplexing Systems Wenjie JIANG Yusuke ASAI Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2009/02/01 Vol. E92-B No. 2 pp. 544-558 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: complexity reduction, maximum likelihood detection, MIMO system, spatial multiplexing,
	Summary \| Full Text:PDF(2.2MB)

Antenna Selection Method for Terminal Antennas Employing Orthogonal Polarizations and Patterns in Outdoor Multiuser MIMO System Naoki HONMA Riichi KUDO Kentaro NISHIMORI Yasushi TAKATORI Atsushi OHTA Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2008/06/01 Vol. E91-B No. 6 pp. 1752-1759 Type of Manuscript: Special Section PAPER (Special Section on 2007 International Symposium on Antennas and Propagation) Category: Smart Antennas & MIMO Keyword: MIMO, multiuser, urban environment, polarization, pattern, antenna selection,
	Summary \| Full Text:PDF(1.2MB)

Proposal of Wireless Traffic Control Schemes for Wireless LANs Takefumi HIRAGURI Takeo ICHIKAWA Masataka IIZUKA Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2008/05/01 Vol. E91-B No. 5 pp. 1340-1348 Type of Manuscript: Special Section PAPER (Special Section on Communication Quality) Category: QoS Control Mechanism and System Keyword: wireless LAN, IEEE802.11, traffic control, load barancing, QoS,
	Summary \| Full Text:PDF(1.1MB)

New Downlink Beamforming Method for Cooperative Multiple Access Point Systems Riichi KUDO Yasushi TAKATORI Kentaro NISHIMORI Atsushi OHTA Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2007/09/01 Vol. E90-B No. 9 pp. 2303-2311 Type of Manuscript: Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation) Category: Smart Antennas Keyword: MIMO, downlink, beamforming, multiple access point system,
	Summary \| Full Text:PDF(1.7MB)

New Robust Beamforming Method for Frequency Offsets in Uplink Multiuser OFDM-MIMO Yasushi TAKATORI Riichi KUDO Atsushi OHTA Koichi ISHIHARA Kentaro NISHIMORI Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2007/09/01 Vol. E90-B No. 9 pp. 2312-2320 Type of Manuscript: Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation) Category: Smart Antennas Keyword: multiuser MIMO, uplink, beamforming, frequency offset,
	Summary \| Full Text:PDF(782.4KB)

Proposal for System Diversity on Software Defined Radio Takashi SHONO Kazuhiro UEHARA Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/09/01 Vol. E84-A No. 9 pp. 2346-2358 Type of Manuscript: PAPER Category: Mobile Information Network and Personal Communications Keyword: software defined radio, algorithm diversity, system diversity, QoS,
	Summary \| Full Text:PDF(1.6MB)

An Effective Data Transmission Control Method for Mobile Terminals in Spot Communication Systems Hiroshi YOSHIOKA Masashi NAKATSUGAWA Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2000/07/25 Vol. E83-A No. 7 pp. 1328-1337 Type of Manuscript: Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks) Category: Keyword: spot communication systems, data transmission method, intelligent transport systems (ITS), DSRC protocol,
	Summary \| Full Text:PDF(1.4MB)

Software Radio Base and Personal Station Prototypes Yasuo SUZUKI Kazuhiro UEHARA Masashi NAKATSUGAWA Yushi SHIRATO Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2000/06/25 Vol. E83-B No. 6 pp. 1261-1268 Type of Manuscript: Special Section PAPER (Special Issue on Software Defined Radio and Its Technologies) Category: Keyword: software, software radio, digital signal processor, personal handy phone system,
	Summary \| Full Text:PDF(793.2KB)

High Capacity and Wide Coverage Cell Station for Personal Communication Systems Kiyoshi KOBAYASHI Tomoaki KUMAGAI Shuji KUBOTA Shigeaki OGOSE Takeshi HATTORI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1999/01/25 Vol. E82-B No. 1 pp. 112-119 Type of Manuscript: PAPER Category: Communication Systems and Transmission Equipment Keyword: personal communication, cell station, diversity, coherent detection, burst-by-burst AFC,
	Summary \| Full Text:PDF(466.4KB)

Bit-Stream-Arranged Weighted Modulation Scheme for Low Delay Spread Frequency Selective Fading Channels Kiyoshi KOBAYASHI Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/07/25 Vol. E81-A No. 7 pp. 1452-1458 Type of Manuscript: Special Section PAPER (Special Section on Fundamentals of Multi-dimensional Mobile Information Network) Category: Keyword: weighted modulation, frequency selective fading, micro-cell system, ADPCM, PCM,
	Summary \| Full Text:PDF(589.1KB)

Bit Significance Selective Frequency Diversity Transmission Tomoaki KUMAGAI Kiyoshi KOBAYASHI Katsuhiko KAWAZOE Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1998/03/25 Vol. E81-B No. 3 pp. 545-552 Type of Manuscript: PAPER Category: Communication Theory Keyword: frequency diversity, spectrum efficiency, fading, ADPCM,
	Summary \| Full Text:PDF(693.6KB)

An FFT Interference Detection Scheme for Interference Suppression in Digital Satellite Communication Systems Takatoshi SUGIYAMA Masanobu SUZUKI Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1997/09/25 Vol. E80-B No. 9 pp. 1352-1362 Type of Manuscript: PAPER Category: Satellite Communication Keyword: digital satellite communication, co-channel interference, interference suppression, notch filter, FEC, FFT,
	Summary \| Full Text:PDF(740.8KB)

Fully Digital Burst Modem for Satellite Multimedia Communication Systems Kiyoshi KOBAYASHI Tetsu SAKATA Yoichi MATSUMOTO Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1997/01/25 Vol. E80-B No. 1 pp. 8-15 Type of Manuscript: Special Section PAPER (Special Issue on Advances in Satellite Communications toward Multimedia Era) Category: Modem and Coding Keyword: digital burst modem, TDMA, satellite communication, VLSIC,
	Summary \| Full Text:PDF(852.9KB)

A Time Division Multiple Access-Time Division Duplex combined with an Alternated Frequency Duplexer for Wireless Personal Communications Katsuhiko KAWAZOE Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/11/25 Vol. E79-B No. 11 pp. 1688-1695 Type of Manuscript: PAPER Category: Mobile Communication Keyword: TDMA, TDD, FDD, fading, diversity, microcell,
	Summary \| Full Text:PDF(721KB)

A Half-Chip Offset QPSK Modulation CDMA Scheme Employing Differential Detection for Advanced Wireless LAN Systems Takatoshi SUGIYAMA Masato MIZOGUCHI Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/05/25 Vol. E79-B No. 5 pp. 693-700 Type of Manuscript: PAPER Category: Radio Communication Keyword: offset QPSK-CDMA, nonlinear channel, differential detection, forward error correction, time diversity, frequency utilization efficiency,
	Summary \| Full Text:PDF(582.5KB)

A Reliable Packet Transmission Method for TDMA Based Wireless Multimedia Communications Katsuhiko KAWAZOE Yoshihisa SUGIMURA Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/03/25 Vol. E79-B No. 3 pp. 251-256 Type of Manuscript: Special Section PAPER (Special Issue on Advanced Adaptive Radio Communication Technologies) Category: Access, Network Keyword: packet, multimedia, personal communication, TDMA, fading, diversity,
	Summary \| Full Text:PDF(477.2KB)

An Integrated Interference Suppression Scheme with An Adaptive Equalizer for Digital Satellite Communication Systems Takatoshi SUGIYAMA Masanobu SUZUKI Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/02/25 Vol. E79-B No. 2 pp. 191-197 Type of Manuscript: PAPER Category: Satellite Communication Keyword: satellite communication, co-channel interference, interference suppression, notch filter, FEC, adaptive equalizer,
	Summary \| Full Text:PDF(546.3KB)

Open Loop Reverse Modulation Carrier Recovery Scheme for Rician and Rayleigh Fading Environments Tetsu SAKATA Shuji KUBOTA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/01/25 Vol. E79-B No. 1 pp. 45-51 Type of Manuscript: PAPER Category: Mobile Communication Keyword: radio communication, carrier recovery, open loop, reverse modulation, anti-fading,
	Summary \| Full Text:PDF(493.8KB)

Phase Ambiguity Resolver for PCM Sound Broadcasting Satellite Service with Low Power Consumption Viterbi Decoder Employing SST Scheme Kazuhiko SEKI Shuji KUBOTA Shuzo KATO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1995/09/25 Vol. E78-B No. 9 pp. 1269-1277 Type of Manuscript: PAPER Category: Communication Systems and Transmission Equipment Keyword: phase ambiguity, Viterbi decoder, PCM sound broadcasting, communication satellites,
	Summary \| Full Text:PDF(703.4KB)

VLSI Implemented 60 Mb/s QPSK/OQPSK Burst Digital Demodulator for Radio Application Yoichi MATSUMOTO Kiyoshi KOBAYASHI Tetsu SAKATA Kazuhiko SEKI Shuji KUBOTA Shuzo KATO
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1994/12/25 Vol. E77-C No. 12 pp. 1873-1880 Type of Manuscript: Special Section PAPER (Special Issue on Multimedia, Analog and Processing LSIs) Category: Multimedia System LSIs Keyword: demodulator, carrier recovery, bit-timing recovery, VLSI, TDMA,
	Summary \| Full Text:PDF(794.8KB)

Ultra-High-Speed and Universal-Coding-Rate Viterbi Decoder VLSIC--SNUFEC VLSI-- Katsuhiko KAWAZOE Shunji HONDA Shuji KUBOTA Shuzo KATO
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1994/12/25 Vol. E77-C No. 12 pp. 1888-1894 Type of Manuscript: Special Section PAPER (Special Issue on Multimedia, Analog and Processing LSIs) Category: Multimedia System LSIs Keyword: FEC, Viterbi decoding, convolutional encoding, VLSIC, satellite communication systems,
	Summary \| Full Text:PDF(741.7KB)

A New Burst Coherent Demodulator for Microcellular TDMA/TDD Systems Yoichi MATSUMOTO Shuji KUBOTA Shuzo KATO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1994/07/25 Vol. E77-B No. 7 pp. 927-933 Type of Manuscript: Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications) Category: Keyword: demodulator, carrier-recovely, clock-recovery, coherent-detection, TDMA/TDD,
	Summary \| Full Text:PDF(586KB)

A New Fully-Digitalized π/4-Shift QPSK Modulator for Personal Communication Terminals Tetsu SAKATA Kazuhiko SEKI Shuji KUBOTA Shuzo KATO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1994/07/25 Vol. E77-B No. 7 pp. 921-926 Type of Manuscript: Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications) Category: Keyword: digitalized modulator, π/4-shift QPSK, low power consumption,
	Summary \| Full Text:PDF(448.5KB)

A Suitable Combination of Modulation and FEC Schemes for Satellite Digital Video Communication Networks Shuji KUBOTA Masahiro MORIKURA Kiyoshi ENOMOTO Shuzo KATO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1993/05/25 Vol. E76-B No. 5 pp. 497-507 Type of Manuscript: Special Section PAPER (Special Issue on Satellite Communications Networking and Applications) Category: Keyword: satellite communication, modulation, FEC, digital video communication,
	Summary \| Full Text:PDF(880.2KB)

A Frequency Utilization Ffficiency Improvement on Superposed SSMA-QPSK Signal Transmission over High Speed QPSK Signals in Nonlinear Channels Takatoshi SUGIYAMA Hiroshi KAZAMA Masahiro MORIKURA Shuji KUBOTA Shuzo KATO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1993/05/25 Vol. E76-B No. 5 pp. 480-487 Type of Manuscript: Special Section PAPER (Special Issue on Satellite Communications Networking and Applications) Category: Keyword: SSMA-QPSK signals, high speed QPSK signals, superposed transmission, FEC, interference cancellation, non-linear channel,
	Summary \| Full Text:PDF(687.3KB)

DSD (Double Soft Decision) Concatenated Forward Error Correction Scheme Shunji HONDA Shuji KUBOTA Masahiro MORIKURA Shuzo KATO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1992/08/25 Vol. E75-B No. 8 pp. 747-754 Type of Manuscript: Special Section PAPER (Special Issue on the 4th Japan-Korea Joint Conference on Communications, Networks, Switching Systems and Satellite Communications (4th JC-CNSS)) Category: Keyword: concatenated codes, soft decision, Viterbi decoding,
	Summary \| Full Text:PDF(606.5KB)