TY - GEN
T1 - Opportunistic relaying through amplify-and-forward distributed space-time codes with partial statistical CSI at relays
AU - Maham, Behrouz
AU - Hjørungnes, Are
PY - 2008/12/1
Y1 - 2008/12/1
N2 - 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.
AB - 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.
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U2 - 10.1109/ALLERTON.2008.4797668
DO - 10.1109/ALLERTON.2008.4797668
M3 - Conference contribution
AN - SCOPUS:64549110708
SN - 9781424429264
T3 - 46th Annual Allerton Conference on Communication, Control, and Computing
SP - 1004
EP - 1008
BT - 46th Annual Allerton Conference on Communication, Control, and Computing
T2 - 46th Annual Allerton Conference on Communication, Control, and Computing
Y2 - 24 September 2008 through 26 September 2008
ER -