A new flexible multiuser detection scheme for DS CDMA systems

We consider a synchronous code division multiple access (CDMA) system where all users share an additive white Gaussian noise channel. For this multiuser communication system a new so-called hybrid multiuser detection scheme based on a favourable link of multistage multiuser detection algorithms and maximum likelihood detection is presented. It is shown that this scheme yields a profitable tradeoff between computational expense and detection performance. In addition, the hybrid detection scheme offers the possibility of parallel computations such that computational delay can be limited to a reasonable size.