The image transmission over wireless communication system suffers from distortion due to the adverse effect of the channel. The Multiple-Input Multiple-Output (MIMO) based wireless system is a promising high data rate interface technology and wireless multipath fading channel. A method based on Space-Time Block Coding (STBC) with MIMO setup for use in wireless communication channels. In the comparison is made between the diversity gains of MIMO systems in terms of BER for high QAM modulation techniques. This paper, performance of WLAN system is simulated and Bit Error Rate (BER) performance is observed.