MIMO detectors comparison for its BER performance in various channels

The no. of users of wireless communication is increasing day by day, but as the radio spectrum is limited hence the only solution is to increase the data rates to accommodate more users. MIMO is a wireless technology that can efficiently increase the data transmission rate, improve system coverage and enhance link reliability. By employing multiple antennas at transmitter and receiver sides, MIMO techniques enable a new dimension- the spatial dimension - that can be utilized in different ways to combat the impairments of wireless channels. But Inter symbol Interference is the main problem, to reduce ISI there are different detection techniques used. This paper will focus on linear and Non linear Detection techniques in the AWGN (Additive White Gaussian Noise) channel, Rician Fading channel and the Rayleigh fading channel. This paper discusses different types of Detectors like Zero Forcing (ZF), Minimum Mean Square Error (MMSE), Maximum likelihood (ML) and Successive interference cancellation (SIC) and concludes that ML has better performance over other all. A simulation results shows in which fading channel getting better performance in terms of BER v/s SNR.