Performance Analysis of BER for OSTBC-MIMO System Concatenated with QPSK-TCM Over Different Wireless Channels

Abstract

In wireless communication systems, massive data rates are needed in several wireless communication systems, and many interested researchers concentrate on assessing and enhancing service techniques to improve network throughput and achieve more spectral utilization that help more users achieve their requirements. Mapping and coding techniques are the basic criteria to improve system data rate with no need to expand the located bandwidth for Orthogonal Space-Time Block Code (OSTBC) wireless communications systems with Multiple-Input Multiple-Output (MIMO) techniques. This work concentrates on evaluating the Bit-Error-Rate (BER) performance of uncoded and Trellis Coded Modulation (TCM) OSTBC MIMO systems of $2\times2,2\times3$, and $4\times 4$ serialized with QPSK over various wireless channels namely, AWGN, Rician, and Rayleigh fading wireless communications channels. In this article, the conducted simulation outcomes show that more $\mathbf{Eb}/\mathbf{No}$ power is required for uncoded QPSK to perform at the same level as the BER performance of TCM-coded QPSK. On average, about 3 $\mathbf{dB}$ gain was achieved due to the use of the TCM technique in the system model. Furthermore, the system performs better in the case of using AWGN channel concerning both uncoded and TCM-coded QPSK.