Equalization techniques in MIMO systems - An analysis

One of the important techniques, which can combat and exploit the frequency-selectivity of the wireless channel in providing high data rate wireless systems, lies in the hand of equalization. The wireless systems that is evolved the last few decades necessitates in the design and analysis of equalization techniques. The current trend as well as the future generation of wireless systems is supposed to possess very high spectral efficiency, presence of rapidly time varying channels due to high mobility and the availability of partial or no channel state information at the transmitter and/or receiver which prescribes MIMO systems. When the data is transmitted at high bit rates, over mobile radio channels, the channel impulse response can extend over many symbol periods, which lead to Inter-symbol interference (ISI). This paper analyses the performances of equalization techniques by considering 2 transmit and 2 receive antenna (2×2 MIMO) over a flat fading Rayleigh multipath channel and provides a bit error rate analysis of the same.