Koichi HOMMA

Pilot Signal Generation Scheme Using Frequency-Dependent Cyclic Shift ZC Sequence for Inter-Cell Interference Mitigation
Daichi IMAMURA Yoshihiko OGAWA Takashi IWAI Tomohumi TAKATA Katsuhiko HIRAMATSU Kazuyuki MIYA Koichi HOMMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/05/01
Vol. E92-B  No. 5  pp. 1680-1687
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Techniques for 3G Evolution)
Category: 
Keyword: 
cyclic shift, Zadoff-Chu sequence, CCI, inter-cell interference, pilot signal, SC-FDMA, E-UTRA, LTE, 
 Summary | Full Text:PDF
A Study on Link Adaptation Scheme with Multiple Code Words for Spectral Efficiency Improvement on OFDM-MIMO Systems
Yasuaki YUDA Katsuhiko HIRAMATSU Masayuki HOSHINO Koichi HOMMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/11/01
Vol. E90-A  No. 11  pp. 2413-2422
Type of Manuscript:  Special Section PAPER (Special Section on Wideband Systems)
Category: MIMO-OFDM
Keyword: 
OFDM, MIMO, link adaptation, codeword, pre-coding, SIC, 
 Summary | Full Text:PDF
Experimental Performance Results of Coherent Wideband DS-CDMA with TDD Scheme
Osamu KATO Kazuyuki MIYA Koichi HOMMA Takashi KITADE Masaki HAYASHI Masatoshi WATANABE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/07/25
Vol. E81-B  No. 7  pp. 1337-1344
Type of Manuscript:  Special Section PAPER (Special Issue on Third Generation Land Mobile Communication Systems)
Category: 
Keyword: 
DS-CDMA, TDD, space diversity, open-loop power control, 
 Summary | Full Text:PDF
DS-CDMA System with Symbol Ranking Type Interference Canceller (SRIC)
Mitsuru UESUGI Osamu KATO Koichi HOMMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/07/25
Vol. E81-B  No. 7  pp. 1401-1408
Type of Manuscript:  Special Section PAPER (Special Issue on Third Generation Land Mobile Communication Systems)
Category: 
Keyword: 
CDMA, interference canceller, FPLMTS, capacity, amount of operation, 
 Summary | Full Text:PDF
Wideband CDMA Systems in TDD-Mode Operation for IMT-2000
Kazuyuki MIYA Osamu KATO Koichi HOMMA Takashi KITADE Masaki HAYASHI Toyoki UE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/07/25
Vol. E81-B  No. 7  pp. 1317-1326
Type of Manuscript:  INVITED PAPER (Special Issue on Third Generation Land Mobile Communication Systems)
Category: 
Keyword: 
DS-CDMA, TDD, space diversity, transmitter power control, 
 Summary | Full Text:PDF
Comparative Evaluation between Parallel Combinatory CDMA and Direct Sequence CDMA for High Speed Radio Communication
Osamu KATO Masaki HAYASHI Mitsuru UESUGI Koichi HOMMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/07/25
Vol. E81-A  No. 7  pp. 1406-1414
Type of Manuscript:  Special Section PAPER (Special Section on Fundamentals of Multi-dimensional Mobile Information Network)
Category: 
Keyword: 
DS-CDMA, parallel combinatory CDMA (PC-CDMA), 2 Mbps transmission, mobile radio, 
 Summary | Full Text:PDF
Soft Decision Viterbi Decoding and Self-Interference Cancellation for High Speed Radio Communication by Parallel Combinatory CDMA
Osamu KATO Masatoshi WATANABE Eiji KATSURA Koichi HOMMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/07/25
Vol. E80-A  No. 7  pp. 1233-1240
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Network)
Category: 
Keyword: 
high rate data transmission, parallel combinatory CDMA, multi-code transmission, Viterbi decoding, interference cancellation, 
 Summary | Full Text:PDF
Field Experiments on 16QAM/TDMA and Trellis Coded 16QAM/TDMA Systems for Digital Land Mobile Radio Communications
Norihito KINOSHITA Seiichi SAMPEI Eimatsu MORIYAMA Hideichi SASAOKA Yukiyoshi KAMIO Kazuyuki MIYA Katsuhiko HIRAMATSU Kazunori INOGAI Koichi HOMMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1994/07/25
Vol. E77-B  No. 7  pp. 911-920
Type of Manuscript:  Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications)
Category: 
Keyword: 
coded modulation, QAM, TDMA, field experiments, land mobile communications, 
 Summary | Full Text:PDF