Error performance of innovations-based MLSE for Rayleigh fadingchannels

摘要

Error performance of maximum likelihood sequence estimation (MLSE)nof digital signals transmitted over Rayleigh fading channels is studiednin this paper. The application of the innovations approach provides usnnot only with a general MLSE receiver structure, but also with a toolnfor analyzing the performance of the receiver. We show that the sequencenpairwise error probability of the MLSE receiver is determined by theneigenvalues of a matrix generated from the autocorrelation function ofnthe received signal. For any practical applications, the MLSE fornRayleigh fading channels exhibits an irreducible error floor thatndepends on the channel characteristics such as the Doppler frequencynbandwidth and frequency selectivity. An upper bound on bit errornprobability can be calculated by using the sequence pairwise errornprobability. Also, it is shown that diversity reception cannsignificantly improve the MLSE error performance