Study of Performance of OFDM-CDMA System with Various Processing Gains

Junjie ZHU  Wai Choong WONG  Liyanage C. DESILVA  

IEICE TRANSACTIONS on Communications   Vol.E84-B   No.3   pp.678-681
Publication Date: 2001/03/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Terrestrial Radio Communications

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In this paper, the performance of OFDM-CDMA system in mobile communication channels with different detection algorithms is evaluated in terms of the probability of bit error as a function of processing gain. Both the frequency diversity and multi-user interference (MUI) are taken into account. The simulation results show that MUI is the dominant factor that affects system performance, and MMSE outperforms the other algorithms. Based on the simulation results, a modified system scheme is proposed which performs better than the conventional method.