A New Class of Efficient Block-Iterative Interference Cancellation Techniques for Digital Communication Receivers

摘要

A new and efficient class of nonlinear receivers is introduced for digital communication systems. These "iterated-decision" receivers use optimized multipass algorithms to successively cancel interference from a Block of received data and generate symbol decisions whose reliability increases monotonically with each iteration. Two variants of such receivers are discussed: the iterated-decision equalizer and the iterated-decision multiuser Detector. Iterated-decision equalizers, designed to equalize intersymbol interference (ISI) channels, asymptotically Achieve the performance of maximum-likelihood sequence detection (MLSD), but only have a computational Complexity on the order of a linear equalizer (LE).