Experimental Performance Results of Coherent Wideband DS-CDMA with TDD Scheme

Osamu KATO  Kazuyuki MIYA  Koichi HOMMA  Takashi KITADE  Masaki HAYASHI  Masatoshi WATANABE  

IEICE TRANSACTIONS on Communications   Vol.E81-B   No.7   pp.1337-1344
Publication Date: 1998/07/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Third Generation Land Mobile Communication Systems)
DS-CDMA,  TDD,  space diversity,  open-loop power control,  

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We previously proposed a next generation cellular system for IMT-2000 based on the Wideband DS-CDMA with TDD scheme (W-CDMA/TDD) and have evaluated its performance by computer simulation, laboratory and field experiment. With the W-CDMA/TDD, because of its correlation between the downlink and the uplink, transmission and reception space diversity (SD) at a base station and open-loop transmit power control (TPC) can be simply realized. This paper reports performance of laboratory and field experiments using a developed testbed. The results shows it has been confirmed that transmission and reception SD and open-loop TPC have sufficient performance under a field environment as well as laboratory environment.