Improve Performance of MIMO-OFDM system using Hybrid Equalization technique

electronics and communication

MIMO-OFDM is the base for further advanced wireless local area network (Wireless LAN) and mobile broadband network standards because it achieves the maximum spectral efficiency and, delivers the maximum capacity, data throughput and higher data rates. But, as the environment is wireless, the information being sent in such systems causes attenuation, path dispersion and lSI (Inter Symbol Interference). In wireless communication systems like MIMO-OFDM, the channel for the transmission of information could be varied quickly with time and may result in the loss of orthogonality of information signal causing ISI or overlapping of the signal bits. This would increase the bit error rate and the system performance degrades. Here is an idea of building an equalizer which would minimize this ISI and the corresponding BER. We make the use of existing linear and nonlinear equalizers from the literature and propose a combination of these two kinds by hybridizing the MMSE, SIC, MRC, MLSE equalizers. The proposed equalizer simulations would be performed in MATLAB along with use of GUI so as to check the error rate at different values of SNR making it user friendly and would result in minimized BER at improved SNR with high receiver diversity.

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