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

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). Even more importantly, unlike the decision-feedback equalizer (DFE), iterated-decision equalizers can be readily used in conjunction with error-control coding. Similarly, iterateddecisionmultiuserdetectors,designedtocancelmultiple-accessinterference(MAI)intypicalwirelessenvir...

• Type: Journal
• Year: 2002
• Where: VLSISP
• Authors: Albert M. Chan, Gregory W. Wornell
• Keywords: Iterated-decision Equalizers, Iterated-decision Multiuser Detector, Multiuser Detector, VLSISP 2002