Application of multiple channel estimators in MLSE detectors for fast time-varying and frequency selective channels

The performance of conventional MLSE equalisers is far from ideal when the channel is fading rapidly compared to the transmitted symbol period due, in part, to poor channel estimation/tracking of the channel variations. A variant on the standard MLSE technique utilising more than one channel estimator has been previously proposed but the increased performance obtained is at the expense of a significant increase in computational complexity. This paper reports work on investigations into the performance/complexity trade-off between this multiple channel estimator technique and a novel version which reduces the number of channel estimators