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   Vol.E81-B   No.7   pp.1317-1326
Publication Date: 1998/07/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Issue on Third Generation Land Mobile Communication Systems)
Category: 
Keyword: 
DS-CDMA,  TDD,  space diversity,  transmitter power control,  

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Summary: 
We previously proposed a next generation cellular system for IMT-2000 based on wideband DS-CDMA with TDD scheme and have evaluated its performance by computer simulation, laboratory and field experiments. This paper presents the design concept of TDD-mode operation on wideband DS-CDMA systems. These systems employ almost the same techniques with a little difference as FDD-mode. We also present the schemes of the TDD-mode specific techniques such as fast cell search, transmission diversity and transmitter power control and show the evaluation results of them are effective. Performance can be improved by use of enhanced techniques such as interference cancellation and adaptive antenna array diversity.