RBF based multiuser detectors for UTRA-TDD

Two radial-basis function (RBF) based detectors which are used as multiuser detectors (MUD) for the UTRA-TDD mode of IMT-2000, are presented. One of the RBF detectors is chip level based (CLB) and the other is preprocessesing based (PPB). A detailed performance evaluation, based on new simulation results of the RBF detectors in the UTRA-TDD system, is presented. These results illustrate that the detectors achieve low BERs, even for time-variant multipath propagation channels (pedestrian, vehicular test environment). Furthermore, it is shown that the BER of the RBF based detector is virtually independent of the number of users. On the down side, the complexity of the detectors is significantly affected by the number of users.