An Iterative List-Based Multiuser Detector for Overloaded Receivers in a Rayleigh Fading Channel

摘要

We consider a wireless communication systemwhere multiple co-channel users transmit data via a synchronous,frequency-flat Rayleigh fading channel. The receiver employsan antenna array. The paper develops an iterative list multiuserdetector for overloaded applications where the numberof transmitted signals exceeds the number of receive antennas.The receiver uses a linear preprocessor to reduce co-channelinterference followed by a multiuser detector with an iterativegroupwise symbol detection algorithm that extracts a list ofthe most likely user symbols. Simulation results show that theproposed detector provides good complexity-performance tradeoffs.