Bc. Ng et al., A structured channel estimator for maximum likelihood sequence detection in multipath fading channels, IEEE VEH T, 48(4), 1999, pp. 1216-1228
This paper describes a channel estimator using known prior information abou
t the transmit and receive filters, It is shown that the composite channel
lies in a certain subspace obtained from the impulse responses of these fil
ters. A structured linear channel model is then developed that is linearly
parameterized by an unknown vector. To illustrate the potential usefulness
of such an approach, the estimated structured channel is used in a multisen
sor and oversampled maximum likelihood sequence estimation (MLSE) receiver.
We also present expressions on the pairwise error probability for the MLSE
receiver based on the structured channel model, Using these results, we in
vestigate the phenomenon of error flooring.