Effect of channel-estimation error on BER performance in cooperative transmission

Seungyoup Han, Seongwoo Ahn, Eunsung Oh, Daesik Hong

Research output: Contribution to journalArticle

113 Citations (Scopus)


In this paper, a framework for evaluating the bit-error-rate (BER) performance of amplify-and-forward (AF) relay-assisted cooperative transmission is provided in the presence of imperfect channel estimation. First, the AF relaying is classified into two cases-a variable gain and a fixed gain. For each case, the closed-form average BER is derived by using the moment-generating function (MGF) of the effective output SNR, which quantifies the SNR penalty due to the noisy channel estimate. Moreover, the asymptotic BER bound is also provided at a high SNR regime for the insight of our approach. In particular, the effect of the feedforward delay on informing the source-relay channel estimate as to the destination is presented in the variable-gain relay. Numerical investigation shows that the analytic result makes an exact match with the simulation, and the comparative superiority between the fixed- and variable-gain relay is discussed.

Original languageEnglish
Pages (from-to)2083-2088
Number of pages6
JournalIEEE Transactions on Vehicular Technology
Issue number4
Publication statusPublished - 2009 Jun 3

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics

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