Amplify-and-forward selection cooperation over Rayleigh fading channels with imperfect CSI

Mehdi Seyfi, Sami Muhaidat, Jie Liang

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


In this paper, we investigate the performance of selection cooperation in the presence of imperfect channel estimation. In particular, we consider a cooperative scenario with multiple relays and amplify-and-forward protocol over frequency flat fading channels. In the selection scheme, only the "best" relay which maximizes the effective signal-to-noise ratio (SNR) at the receiver end is selected. We present lower and upper bounds on the effective SNR and further we provide closed-form expressions for the bounds on average symbol error rate (ASER), outage probability and average capacity per bandwidth of the received signal in the presence of channel estimation errors. A simulation study is presented to corroborate the analytical results and to demonstrate the performance of relay selection with imperfect channel estimation.

Original languageBritish English
Article number6108302
Pages (from-to)199-209
Number of pages11
JournalIEEE Transactions on Wireless Communications
Issue number1
StatePublished - Jan 2012


  • amplify-and-forward
  • average capacity
  • average symbol error rate
  • imperfect channel estimation
  • outage probability
  • Relay selection


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