Performance Comparison of MIMO Systems over AWGN and Rician Channels using OSTBC4 with Zero Forcing Receivers

Multiple-input multiple-output (MIMO) are used in wireless communications to achieve high data rates within the limited frequency spectrum. MIMO uses multiple transmitting and receiving antennas so as to utilize the advantages of spatial diversity. The performance analysis of MIMO system over AWGN and Rician fading channels using OSTBC4 as space time coding with Zero Forcing (ZF) receiver is presented. The performance can be improved by using antenna diversity at receiver side as the number of transmitting antennas is four in OSTBC4. In this paper, the Bit Error Rate (BER) analysis for MPSK modulation using OSTBC4 over AWGN and Rician channels using zero forcing receivers is presented. Index Term– MIMO, AWGN, Rician, OSTBC4, spatial diversity, antenna diversity, Zero Forcing, Bit Error Rate, M-PSK.