Skip to Main Content
An original turbo multiuser detector for overloaded coded DS-CDMA systems is presented and studied; the performance of the proposed system is tested by Monte Carlo simulations and by means of the density evolution theory. The turbo-MUD receiver is based on the use a combination of a linear MMSE detector in the first stage and an interference cancellation scheme in the successive ones. The inputs of both receivers are the soft information from a bank of turbo decoders. The performance of the proposed receiver can be effectively predicted in overloaded communication systems by means of the density evolution technique; the use of this technique also permits the proper number of MMSE iterations to be evaluated, making the design of the receiver easier.
Wireless Communications and Networking Conference, 2005 IEEE (Volume:1 )
Date of Conference: 13-17 March 2005