Analysis of MIMO system with MMSE-SIC Receiver for Equalization

Abstract

Multiple-input–multiple-output (MIMO) technology is a latter development in wireless communications and has been shown to increase channel capacity in single user systems. The use of multiple antennas at both the transmitter and receiver can considerably increase the channel capacity. These systems are called the multiple input multiple-output (MIMO) systems. Growth of mobile data applications has increased the requirement for wireless communication systems which offers high throughput, wide coverage, and improved reliability. The main challenges in the design of such systems are the limited resources (like transmission power, scarce frequency bandwidth and limited implementation complexity) and the impairments of the wireless channels which includes noise, interference, and fading effects. MIMO system is one of the favourable wireless technologies that can attain above demands. In this thesis, the performance of Multiple-input–multiple-output (MIMO) scheme is analyzed under Rayleigh fading channel using Maximum Ratio Combining (MRC) method for Minimum mean square error (MMSE), MMSE-SIC, Zero-forcing (ZF), ZFSuccessive interference cancellation (ZF-SIC) equalization techniques. The analysis of this combining method is done on the basis of two major factors, Signal to Noise Ratio (SNR) and Bit Error Rate (BER) performance using BPSK and QPSK modulation techniques. With increase in number of antenna on receiver side, SNR gets maximized and BER gets minimized. It is analyzed that MRC with QPSK modulation has shown better evaluation results than BPSK.