Performance analysis of orthogonal space–time block coding with antenna selection

A new approach for performance analysis of orthogonal space-time block coding systems with antenna selection is presented. Antenna selection has been performed at the transmitter and/or at the receiver sides. Closed-form expressions are derived for the approximate average bit error rate (BER) of the considered system for M-ary quadrature amplitude modulation and phase-shift keying schemes. Different from other approaches presented in the literature, analytical expressions are derived for the average signal-to-noise ratio (SNR) gain obtained from each antenna selection scheme, and then using those SNR gains closed-form expressions are obtained for the approximate average BER performance. The system performances of several forms of the presented scheme are evaluated and compared. It is shown that the results obtained from the mathematical expressions match closely with simulation results.