Joint maximum likelihood sequence estimator with dynamic channel description

摘要

A cellular communication signal receiver (10) receives a desired signal in the presence of at least one co-channel interference signal. The receiver comprises a channel estimator (12) configured to receive a plurality of training signal samples to estimate the finite impulse response to the desired signal and the co-channel interference signal. The finite impulse response estimates having a predetermined number of channel taps define the length of the desired channel and the length of co-channel interference channel. A Viterbi decoder (20) is coupled to the channel estimator, and configured to receive the desired and co-channel interference signals. The channel estimator generates channel tap estimates. A power calculator (14) is coupled to the channel estimator and configured to estimate the power of the estimated channel taps. A joint channel trimmer (18) is coupled to the power calculator and configured to maintain ajoint channel length, such that the desired signal channel length plus the co-channel interference channel length have a fixed size that defines the number of states the Viterbi decoder allocates to the desired signal and the co-channel interference signal. <IMAGE>