RAKE reception with maximal-ratio and equal-gain combining for DS-CDMA systems in Nakagami fading

Mohamed Slim Alouini, Sang Wu Kim, Andrea Goldsmith

Research output: Contribution to conferencePaperpeer-review

27 Scopus citations

Abstract

We study coherent binary direct-sequence code division multiple access (DS-CDMA) systems operating over frequency-selective Nakagami fading channels. In particular a performance comparison between maximal-ratio combining (MRC) and equal-gain combining (EGC) RAKE receivers is considered. For interference limited systems, perfect MRC RAKE receivers can accommodate about 5 m/(5 m-1) more users than EGC RAKE receivers, where m is the Nakagami fading parameter. MRC has a higher rate of improvement than EGC as the number of combined paths increases. However, imperfect or inaccurate channel fading estimation leads to serious degradation in the performance of MRC receivers and in that case EGC becomes superior to MRC.

Original languageEnglish (US)
Pages708-712
Number of pages5
StatePublished - 1997
Externally publishedYes
EventProceedings of the 1997 IEEE 6th International Conference on Universal Personal Communications, ICUPC'97. Part 1 (of 2) - San Diego, CA, USA
Duration: Oct 12 1997Oct 16 1997

Other

OtherProceedings of the 1997 IEEE 6th International Conference on Universal Personal Communications, ICUPC'97. Part 1 (of 2)
CitySan Diego, CA, USA
Period10/12/9710/16/97

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture

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