A New SIMO CDMA System UsingMUML-CMVDR Receiver
Wang Zong-xin · Fudan xuebao. Ziran Kexue ban · 2004
A simple SIMO(single input multiple output)CDMA system with high performance,which uses constrained minimum variance distortionless response (CMVDR)receiver based on maximum likelihood (ML) estimation of multiuser (MUML-CMVDR receiver)to suppress multiple access interference(MAI), intersymbol interference(ISI)and noise,is proposed.The SIMO CDMA system model and CDMA multiuser's multipath channel model are presented.The parameters of channels are estimeted by ML method.With these estimated parameters, two CMVDR receivers,i.e., separately weighted and unitarily weighted,are proposed.The simulations of the proposed SIMO CDMA system are also presented.The performances of the separately weighted and unitarily weighted MUML-CMVDR receiver,and also the performances of the proposed SIMO CDMA system and other systems are compared and discussed.