Multiuser Detection for Out-of-Cell Cochannel Interference Mitigation in the IS-95 Downlink

摘要

This paper considers the application of multiuser detection techniques to improve the quality of down- link reception in a multi-cell IS-95 digital cellular communication system. In order to understand the relative performance of suboptimum multiuser detectors including the matched filter detector, optimum multiuser detection in the context of the IS-95 downlink is first considered. A reduced complexity optimum detector that takes advantage of the structural properties of the IS-95 downlink and exhibits exponentially lower complexity than the brute-force optimum detector is developed.