Comparison of Channel Equalization Schemes for MIMO-OFDM⋆

Inter-symbol interference is a major impediment to wireless communication that significantly lowers the data quality. The fundamental objective of the equalization techniques is to reconstruct the actual signal using a filter or other ways and eliminate the impact of ISI in order to guarantee the accuracy of data transmission. Channel equalization is one of the techniques through which the effects of ISI can be greatly reduced and in certain cases be eliminated on the received signal. Extensive research has been done on the relevant techniques with mathematical expressions, and the same has been presented under the section Channel Equalization. In this chapter, we explore the three different channel equalization techniques and study how well they perform to reduce the effects of ISI on the received signal. We analyze ZF, MMSE, and MRC equalization techniques and discover that MRC equalization technique offers very low BER rates as compared to ZF and MMSE techniques.