Performance Analysis of Multiple Transmit Antennas Selection Affected by Erroneous CSI in Rayleigh Fading Channel

For a multiple-input-single-output (MISO) communications system, we take the presence of the erroneous channel state information (CSI) into consideration. Multiple transmit antennas selection (TAS) over MISO systems with Alamouti space-time block coding (STBC) is investigated, and a solution over order statistic characteristic of the selective channel with erroneous CSI is proposed. We assume that channel is independent and flat channel is a Rayleigh fading and the system employs binary phase-shift keying (BPSK) modulation. A more accurate analytical expression of bit-error rate (BER) Chernoff upper-bound (CUB) of Alamouti scheme with TAS has been derived. It is shown that the transmit diversity order is equal to the largest ordinal number of the antenna