Design of low complexity multiuser detection using information theoretic criteria

In this paper, we propose a novel low complexity minimum mean-squared based multiuser detection (MMSE MUD), which employs partial but essential information of the interference, in a multichannel TDMA system. The new approach begins with the determination of the effective channel length of the interference based on information theoretic criteria. We then truncate the channel taps according to the taps´ power using the thus obtained effective channel length. The computational complexity of the resulting MUD is thereby reduced. Analytic studies are also carried out to provide more insight into the proposed approach. The furnished simulations show that the new MUD offers close bit-error-rate (BER) performance to the full complexity one but with substantially reduced complexity