Opportunistic relaying through amplify-and-forward distributed space-time codes with partial statistical CSI at relays

Behrouz Maham, Are Hjørungnes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

We consider a wireless relay network with Rayleigh fading channels, and apply distributed space-time coding (DSTC) in amplify-and-forward (AF) mode. It is assumed that the relays have statistical channel state information (CSI) of the local source-relay channels, while the destination has full instantaneous CSI of channels. It turns out that, combined with power allocation in the relays, AF DSTC results in a new opportunistic relaying scheme, in which the best relay is selected to retransmit the source's signal. Furthermore, we have derived the optimum power allocation between two cooperative transmission phases by maximizing the average received SNR at the destination. Next, assuming M-PSK and M-QAM modulations, we analyze the performance of cooperative diversity wireless networks using AF opportunistic relaying. We first derive the probability density function (pdf) and the moment generating function (MGF) of the received SNR at the destination. Then, the MGF is used to determine the symbol error rate in Rayleigh fading channels. Our analytical results have been confirmed by simulation results, using full-rate, full-diversity distributed space-time codes.

Original languageEnglish
Title of host publication46th Annual Allerton Conference on Communication, Control, and Computing
Pages1004-1008
Number of pages5
DOIs
Publication statusPublished - Dec 1 2008
Event46th Annual Allerton Conference on Communication, Control, and Computing - Monticello, IL, United States
Duration: Sep 24 2008Sep 26 2008

Publication series

Name46th Annual Allerton Conference on Communication, Control, and Computing

Other

Other46th Annual Allerton Conference on Communication, Control, and Computing
CountryUnited States
CityMonticello, IL
Period9/24/089/26/08

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Software
  • Control and Systems Engineering
  • Communication

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    Maham, B., & Hjørungnes, A. (2008). Opportunistic relaying through amplify-and-forward distributed space-time codes with partial statistical CSI at relays. In 46th Annual Allerton Conference on Communication, Control, and Computing (pp. 1004-1008). [4797668] (46th Annual Allerton Conference on Communication, Control, and Computing). https://doi.org/10.1109/ALLERTON.2008.4797668