Performance Analysis of DS/CDMA Communication System with MRC Diversity and CCI Canceller in Nakagami Fading Environment

나카가미 페이딩 환경하에서 MRC 다이버시티와 간섭제거기를 채용한 DS/CDMA 통신 시스템의 성능 분석

  • 소준영 (동신대학교 전기전자공학과) ;
  • 강희조 (동신대학교 전기전자공학과)
  • Published : 1999.12.01


In this paper, error performance of DS/CDMA GMSK system has been analyzed in a radio channel which is characterized by multi-user interference(MUI) and Nakagami fading. The DS/CDMA GMSK system adopts Maximum Ratio Combining(MRC) diversity and co-channel interference (CCI) to enhance system performance. Using the derived error probability equation, the error performance of DS/CDMA GMSK system has been evaluated and shown in figures to discuss as a function of PN code length(N), number of multi-user(K), number of diversity branch(L), and bit energy per noise power ratio ($E_b/N_0$), fading index(m). The results show that there is a substantial enhancement in performance by employing an MRC diversity or a CCI canceller. Additional improvement can be obtained when the MRC diversity and the CCI canceller are adopted in cascade form. Consequently, we expected that proposed system structure is reliable to the voice communication system in Nakagami fading, multi-user interferences and multipath channel.



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