Performance analysis of Alamouti scheme with transmit antenna selection in non-identical Nakagami-m fading channels

ABSTRACTIn this paper, error performances of multiple‐input multiple‐output systems that employ Alamouti‐coded transmission with transmit antenna selection are examined for binary phase‐shift keying, binary frequency‐shift keying, M‐ary phase‐shift keying, and M‐ary quadrature amplitude‐modulation signals in independent but non‐identically distributed flat Nakagami‐m fading channels. Exact symbol error rate expressions are derived by using the moment‐generating function‐based analysis method. Upper bound expressions have been obtained in order to examine the asymptotic diversity order of transmit antenna selection/Alamouti scheme. Also, outage probability analysis of investigated systems has been given in order to examine the system capacity. Monte Carlo simulations have validated the analytical symbol error rate performance results. Copyright © 2011 John Wiley & Sons, Ltd. This paper focuses on error performance of the hybrid diversity scheme that employs Alamouti coded transmission with transmit antenna selection (TAS) (i.e., TAS/Alamouti) for binary frequency shift keying, M‐ary phase shift keying and M‐ary quadrature amplitude modulation signals in independent but non‐identically distributed (i.n.d.) flat Nakagami‐m fading channels. Analytical and simulation results have showed that the asymptotic diversity order of TAS/Alamouti scheme is 12 which results in significant signal‐to‐noise ratio gains depending on the modulation level, the numbers of transmit and receive antennas (nT and nR) and the fading parameters mj, j = 1,2,…,nT.