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PERFORMANCE OF MULTIUSER DETECTION FOR CDMA SYSTEM IN FLAT RAYLEIGH FADING ENVIRONMENT |
Nie Jingnan; Cheng Shixin; You Xiaohu |
National Mobile Communications Lab., Southeast University,Nanjing 210096 |
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Abstract In a CDMA wireless conmunication network using the conventional signal detection, the capacity of the system is limited and the performance is degraded by the multi-access interference (MAI). The multiuser signal detection, which make use of cross-correlation information between two spread spectrum codes, can reduce or eliminate the MAI in a Gaussian channel so as to mitigate the near-far effects and increase the system capacity. This paper extends the multiuser detector to the flat Rayleigh fading CDMA environment and discusses the bit error rate of typical multiuser detection algorithms in such a environment by combining analysis and simulation. It is
concluded that the multiuser detection is superior to conventional detections in the flat Rayleigh fading channels.
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Received: 10 November 1995
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