International Journal of Engineering and Technology

Wireless communication using Multiple-Input Multiple-Output (MIMO) links has emerged as one of the most significant breakthroughs in modern communications because of the huge capacity and reliability gains promised even in worst fading environment. This paper presents an overview of some important behaviors of MIMO systems under Rayleigh channel environments. This work describes the basic ideas of MIMO transmission systems and focused and investigated the BER performance. All analysis was performed under ideal identical independent fading conditions by the use of MATLAB. At the initial stage of the work we related the SNR and the error performance of MIMO systems with the diversity schemes, in the later part of the paper, implementations of different equalizers are also verified for the improvement of the BER performance. Each chapter is rounded by a number of simulations to deepen the understanding of the performance with the use of multiple antennas and equalizers in wireless communication over Rayleigh wireless radio channels. MIMO fading channels are correlated to observe mutual coupling between antenna elements. Receiver diversity is analyzed especially with the Maximal Ratio Combining(MRC) technique and fair comparison is done with Equal Gain Combining(EGC) and Selection- Combing(SC). Further study is done with integration of Maximum Likelihood (ML), Maximum Mean Square Equalization(MMSE) and Zero Forcing(ZF). All the results obtained are simulated by using the MATLAB, under Rayleigh channel conditions.