Performance Analysis of TAS/STBC Systems under n-Rayleigh Fading Channels

The average symbol error probability (ASEP) of multiple-input multiple-output (MIMO) systems employing transmit antenna selection (TAS) and orthogonal space-time block code (STBC) under n-Rayleigh fading channels is investigated in this paper. Based on the scalar additive white Gaussian noise (AWGN) channel approach, the exact form expressions of the signal-to-noise ratio (SNR) at the receiving end are derived for multiple quadrature amplitude modulation (MQAM), and multiple phase shift keying modulation (MPSK). Then the ASEP performance under different conditions is evaluated through numerical simulations. Simulation results show that: the ASEP performance can be improved with the increase of the number of transmit antennas or receive antennas, when SNR = 12 dB, the ASEP of (3,3; 6) with QPSK is 2 × 10−3, (4,4;8) is 2× 10−4, (5,5; 10) is 2 × 10−5.