Study of Transmission Characteristics of MIMO System for Different Modulation Techniques
The performance of 2X2 Multiple Input Multiple Output (MIMO) antenna systems has been analyzed by determining the transmit diversity using Alamouti Space Time Coding (STBC) techniques. For the BPSK and QPSK modulation technique transmission characteristics are determined. Adaptive White Gaussian Noise (AWGN) has been used presuming flat fading Rayleigh channel. On receiver side, linear equalization techniques such as Zero Forcing (ZF) and Maximum Likelihood Detector (MLD) were employed for computing BER. It is found that for 5 dB Eb/No, the BER values of BPSK using ZF Equalizer 0.0687, BPSK using MLD Equalizer 0.0151, QPSK using ZF Equalizer 0.0070, QPSK using MLD Equalizer 1 is obtained.