Low complexity MIMO receiver based on adaptive duplicated filters and interference canceller

A low complexity receiver named MIMO-ADIC, which is based on an adaptive MUD mixed with interference cancellation (ADIC MUD), is presented and analyzed in the MIMO environment. This proposed adaptive MIMO receiver yields BER results equivalent to those of the MMSE-SIC receiver in perfect knowledge of channel gains as well as improved BER robustness when the channel impulse responses are not perfectly estimated. Its advantage of not employing matrix inversion is particularly obvious in the complexity study. Indeed, compared with most recent reduced complexity versions of MMSE-SIC detection of the V-BLAST system, MIMO-ADIC is up to 2.5 times less complex in term s of number of used antennas in MIMO systems.