A Novel Multiuser Detector For Nonlinearly Modulated CDMA Systems

초록

Noncoherent multiuser detection for CDMA systems with M-ary nonlinear modulation was recently studied, and noncoherent optimum, decorrelative, and MMSE detection schemes for this kind of system were proposed and analyzed in previous papers. In this paper we propose a novel blind adaptive noncoherent decorrelative multiuser prefilter for CDMA systems with M-ary nonlinear modulation over AWGN channel. The proposed multiuser detector in this paper uses known information as much as possible, so it provides better performance compared with previous multiuser detectors for nonlinearly modulated CDMA systems in terms of convergence properties and symbol error probability.