UniversePG l www.universepg.com 77 Study the BER Performance Comparison of MIMO Systems Using BPSK Modulation with ZF and MMSE Equalization G. M. Waliullah 1 , Diponkor Bala 1 , Ashrafunnahar Hena 2 , Md. Ibrahim Abdullah 1 , and Mohammad Alamgir Hossain 1 * 1 Dept. of Computer Science and Engineering, Islamic University, Kushtia, Bangladesh; and 2 Dept. of Electrical and Electronic Engineering, Islamic University, Kushtia, Bangladesh. *Correspondence: alamgir@cse.iu.ac.bd (Mohammad Alamgir Hossain, Assistant Professor, Dept. of Computer Science and Engineering, Islamic University, Kushtia, Bangladesh). ABSTRACT In the modern age, wireless communication is very helpful in various mobile antenna communication systems. In mobile communication systems, the transmission of data transfer rates is very high and it plays an important role in several services like video, top-quality audio, and mobile integrated service digital network. During the transmission of data at higher data transmission rates through the mobile radio channels, the channel impulse response can spread over many symbol periods as well as causes inter-symbol interference (ISI). Wireless transmission is suffering from fading and interference effects which may be combated with equalizer. Due to fading and interference, it creates a problem for signal recovery in wireless communication. The main objective of this paper is to analyze the different types of equalizers such as ZF and MMSE for BPSK modulation. The simulation result has been developed by using MATLAB toolbox version 2015a and a multi-tap ISI channel is considered. By analyzing the simulation result it shows that if the number of tap lengths is increasing, BER will decrease in ZF equalizer. And finally shows BER vs SNR comparison of two different types of an equalizer and is able to find out MMSE performance is better than ZF equalizer. Keywords: MIMO systems, BPSK modulation, BER performance, ZF, MMSE equalization, AWGN, and SNR. 1. INTRODUCTION We are currently living in the age of wireless technology and day by day the use of wireless technology is growing at a tremendous rate. Multiple Input Multiple Output (MIMO) refers to the antenna configuration technology for wireless transmissions where the multiple antennas are used at both trans- mitter and receiver sides. The antennas at both ends of the communications circuit are combined to decrease errors and optimize data speed (David et al., 2003; Zhang and Kung, 2003). The MIMO system uses multiple antennas to transmit multiple parallel signals for transmission. The MIMO techniques have attracted great attention due to multiple antennas at both transmitter and receiver being employed; it provides the possibility of upper data rates compared to single antenna systems (Telatar, 1999; Tarokh et al., 1999). A point-to-point (for single user) MIMO commu- nication system promises large gains for both data transmission rates and reliability and these are accomplished via the utilization of space-time codes (diversity gain oriented) (Ju et al., 2013). Australian Journal of Engineering and Innovative Technology, 2(5), 77-84, 2020 Publisher homepage: www.universepg.com, ISSN: 2663-7804 (Online) & 2663-7790 (Print) https://doi.org/10.34104/ajeit.020.077084 Australian Journal of Engineering and Innovative Technology Journal homepage: www.universepg.com/journal/ajeit