Performance of Broadband MC-CDMA Systems with Transmit Diversity

Incheol JEONG  Masao NAKAGAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E85-B   No.10   pp.1937-1943
Publication Date: 2002/10/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Mobile Multimedia Communications)
Category: 
Keyword: 
multicarrier,  CDMA,  transmit diversity,  

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Summary: 
In this paper, three multiple access schemes, single carrier (SC)-CDMA, multicarrier (MC)-CDMA, and frequency & time spread (FTS)-CDMA, with space time transmit diversity (STTD) are presented for a broadband mobile communication system. In general, broadband communication systems are easily affected by severe frequency selective fading which results in the degradation of the system performance due to the multipath. In order to improve the system performance in such a fading environment, STTD is applied to these CDMA systems. Computer simulation is carried out to evaluate the system performance, and the BER results are compared with each other. From the simulation results, it is found that the performance of MC-CDMA with STTD is better than that of the other systems, and SC-CDMA cannot improve the system performance by using STTD.