Multiuser detection of synchronous CDMA signals by the Gibbs coupler

Code-division multiple-access (CDMA) is a multiplexing technique which has become a driving force behind the rapidly advancing communications industry. In order to recover transmitted signals at the receiver when CDMA is used, multiuser detection techniques are engaged. In the past, various techniques have been developed to approach the performance of the optimum multiuser detector, and in this paper we have the same objective. We propose a new multiuser detector which is developed under the Bayesian framework and implemented by a novel efficient perfect sampling algorithm called the Gibbs coupler. The simulation results demonstrate excellent performance of the proposed detector.