Hiroshi KAZAMA


Frequency Asynchronous Cross-Polarization Interference Canceller for Variable Polarization Frequency Division Multiplexing (VPFDM)
Fumihiro YAMASHITA Junichi ABE Kiyoshi KOBAYASHI Hiroshi KAZAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/11/01
Vol. E92-B  No. 11  pp. 3365-3374
Type of Manuscript:  Special Section PAPER (Special Section on Satellite Communication Technologies in Conjunction with Main Topics of JC-SAT2008)
Category: 
Keyword: 
satellite communicationscross-polarizationfrequency offsetinterference canceller
 Summary | Full Text:PDF(2.2MB)

Mobile Multimedia Satellite Communication System at Ku Band
Fumiaki NAGASE Hiroshi TANAKA Masayoshi NAKAYAMA Tomohiro SEKI Hiroshi KAZAMA Hideki MIZUNO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/04/01
Vol. E84-B  No. 4  pp. 903-909
Type of Manuscript:  Special Section PAPER (Special Issue on Mobile Multimedia Communications)
Category: 
Keyword: 
satellite communicationmobile communicationmultimediatracking antennasystem throughput
 Summary | Full Text:PDF(17.2MB)

Low C/N Spread Spectrum Modem for Random Access Satellite Communications
Kiyoshi KOBAYASHI Hiroshi KAZAMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/12/25
Vol. E82-A  No. 12  pp. 2743-2750
Type of Manuscript:  Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
spread spectrumrandom accessmodemcode synchronizationpilot signal transmissionsatellite communication
 Summary | Full Text:PDF(292.8KB)

Semi-Autonomous Synchronization among Base Stations for TDMA-TDD Communication Systems
Hiroshi KAZAMA Shigeki NITTA Masahiro MORIKURA Shuzo KATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1994/07/25
Vol. E77-B  No. 7  pp. 862-867
Type of Manuscript:  Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications)
Category: 
Keyword: 
synchronization schemeTDMA-TDD communication systembase stationpersonal communication
 Summary | Full Text:PDF(501.8KB)

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 signalshigh speed QPSK signalssuperposed transmissionFECinterference cancellationnon-linear channel
 Summary | Full Text:PDF(687.3KB)

A Feedback-Loop Type Transmission Power Control for TDMA Satellite Communication Systems
Hiroshi KAZAMA Takeo ATSUGI Shuzo KATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/05/25
Vol. E76-B  No. 5  pp. 529-535
Type of Manuscript:  Special Section PAPER (Special Issue on Satellite Communications Networking and Applications)
Category: 
Keyword: 
TDMA satellite communicationtransmission power controlfeedback-looprain attenuation
 Summary | Full Text:PDF(573.6KB)