Quasi-Optimum Multiuser Detector Using Co-Channel Interference Cancellation Technique in Asynchronous DS/CDMA

Masatsugu TAKEUCHI  Shin'ichi TACHIKAWA  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E80-A   No.7   pp.1211-1217
Publication Date: 1997/07/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Multi-dimensional Mobile Information Network)
Category: 
Keyword: 
CDMA,  asynchronous,  co-channel interference,  multiuser,  

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Summary: 
In this paper, we propose a quasi-optimum multiuser detector using co-channel interference cancellation technique in an asynchronous code-division multiple-access communication system, and evaluate its performance by computer simulations. In the proposed detector, maximum likelihood sequence estimation is performed to compare the original received signal with replicas of the signal which are produced from the demodulation data bit sequence of a co-channel interference canceller. In several conditions, the proposed detector is compared with the co-channel interference canceller, and it is shown that the average bit error rate characteristics of the propose detector are improved considerably.