Performance of Volterra and MLSD receivers for nonlinear band-limited satellite systems

This paper evaluates the performance of Volterra equalizers and maximum-lik elihood sequence detection (MLSD) receivers for compensation of signal dist ortion in nonlinear bandlimted satellite systems. In addition, the performa nce of a receiver with a fractionally-spaced equalizer followed by a Volter ra equalizer is studied (FSE-Volterra equalizer), For the equalizers, adapt ation of the equalizer weights is considered including a multiple-step LMS algorithm which improves the convergence characteristics. Two MLSD receiver structures are considered: the optimum receiver consisting of a matched-fi lter bank followed by a Viterbi detector and a suboptimum receiver consisti ng of a single receiver filter followed by a Viterbi detector. The performa nce of the MLSD receivers is then compared to that of the equalizers.