Innovations-based MLSE for Rayleigh fading channels

Use of the innovations approach for developing MLSE (maximum likelihood sequence estimation) algorithms for signals transmitted over Rayleigh fading channels is considered. The derived receiver demodulates the signals recursively in a noncoherent fashion and is applicable to any linearly modulated signals and to both frequency-nonselective and frequency-selective Rayleigh fading channels. The algorithms can be implemented by a bank of FIR (finite impulse response) time-invariant filters followed by a VA (Viterbi algorithm) processor. A unified interpretation of MLSE of signals is obtained by using the innovations approach