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Performance Analysis of MC-DS-CDMA System Using a Interference Suppression Method in a Multipath Fading Channel  

Park Tae-Yoon (전북대학교 전자정보공학부 미디어통신연구실)
Choi Jae-Ho (전북대학교 전자정보공학부, 전북대학교부설공학연구실 공업기술연구센터)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.27, no.8B, 2002 , pp. 745-751 More about this Journal
Abstract
The performance of existing CDMA-type multiple access data transmission systems is limited by interferences due to adverse mobile communication channel characteristics. Among them, the multi-user interference becomes one of the major performance degradation factors because the signal-to-signal orthogonality can be easily perturbed when numerous user signals are distorted by multipath fading channels and mixed together. In order to enhance the performance of CDMA-type systems by suppressing the multi-user interference, we have adopted chip-based cyclic prefix insertion along with adaptive one-tap DFE equalization into MC-DS-CDMA, which is known for its robustness in the frequency selective multipath fading channel environment. In order to assess the performance of the proposed system, a set of computer simulations is performed in the reverse link in which each user signal undergoes different multipath Rayleigh fading. The results show us a superior performance of our system over other CDMA systems in terms of SNR to BER measurements.
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