Cascaded Co-Channel Interference Cancelling and Diversity Combining for Spread-Spectrum Multi-Access over Multipath Fading Channels

Young C. YOON  Ryuji KOHNO  Hideki IMAI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E76-B   No.2   pp.163-168
Publication Date: 1993/02/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Issue on Land Mobile/Portable Propagation)
Category: 
Keyword: 
spread-spectrum multi-access,  co-channel interference cancellation,  diversity combining,  multipath fading,  

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Summary: 
We propose a direct-sequence spread-spectrum multi-access (DS/SSMA) receiver that incorporates multipath diversity combining and multistage co-channel interference (CCI) cancellation. This receiver structure which is more resistant to the near/far problem essentially removes more and more of the CCI with each successive cancellation stage. With the assumption that perfect channel estimates have been obtained, we analyze the bit error rate (BER) performance of this system when received powers are unequal. Results show that the BER can approach that of a single-user case as the number of CCI cancellation stages increases.