Performance analysis of a MIMO-OFDM system with space frequency block coding with MPSK and MQAM in rician and nakagami-m fading environments

Abstract

The approach here is to analyze the performance of SFBC-OFDM system in order to utilize the diversities in frequency and space with MPSK and MQAM modulation scheme over Rician and Nakagami-m fading environment. The analysis is done after deriving the closed-form expressions for MIMO-SFBC-OFDM systems over frequency-selective fading channels for different channel parameters, code rate and antenna configurations. These derived expressions are used also to analyse the difference in performance between coded and uncoded system and to find out the optimum number of antenna for a desired improvement using numerical analysis. And the final approach is to verify the analysis with the existing published literature. It can be seen that that the improvement in SNR(dB) in Nakagami-m fading is better than that of a Rician fading. The proposed expressions can be used to quantify the amount of degradation and improvement in the BER at the receiver.