Receiver design in multicarrier DS CDMA communications

Abstract

We consider the design of multiuser receivers for improving the performance of MC DS CDMA communications over fading channels. We present a class of spreading codes that reduces the dimension of MMSE receiver and ML receiver without any performance loss. These codes are shown to be optimum for independent fading channels under a code design criterion derived. Simulation results are provided to demonstrate the significant gains in performance and simplicity due to the proposed techniques.