Performance Analysis of Zero Forcing and MMSE Equalizer on MIMO System in Wireless Channel
Published: 2020
Author(s) Name: G. M. Waliullah, Diponkor Bala, Mst. Ashrafunnahar Hena, Md. Ibrahim Abdullah, Mohd. Alamgir Hossain |
Author(s) Affiliation: Department of Computer Science & Engineering, Islamic University, Kushtia, Bangladesh.
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Abstract
In wireless communication research multiple communication antennas are one of the major contexts. At present wireless communication is moving fast and the best example is MIMO. Wireless transmission is suffering from fading and interference effects which may be combated with equalizer. As a result of fading and interference, it creates a problem for signal recovery in wireless communication. The MIMO system uses Multiple Transmit and Multiple Receive antennas which take advantages of multipath propagation during a high distraction environment. This paper analyses the performance of Zero Forcing (ZF) and Minimum Mean Square Error (MMSE) equalizer for 2×2 and 4×4 MIMO wireless channels. By using MATLAB toolbox version 2015a simulation results can be got to the RF processing lab. The Bit Error Rate (BER) features for various communication antennas is simulated in the MATLAB toolbox and many merits and demerits of the system are discussed. The simulation results show that the equalizer based zero-forcing receiver is helpful for noise-free channel and is successful in removing ISI, but MMSE is an optimal choice than ZF in terms of BER characteristics.
Keywords: ISI, Bit Error Rate (BER), BPSK, Maximal Ratio Combining (MRC), 2×2 MIMO channel, MIMO system, MMSE equalizer, Signal to Noise Ratio (SNR), ZF equalizer.
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