Multiuser Detectors for Multiple Antenna UWB Systems

Ultra-wideband (UWB) transmissions have well-documented advantages for low-power, peer-to-peer, and multiple-access communications. In this paper, we present novel linear receiver algorithms for multiuser detection (MUD) based on minimum mean square error (MMSE) for UWB multiuser communication systems. We assume multiple antennae at the receiver. The algorithms exploit inherent multipath diversity and mitigate the effects of both inter symbol interference (ISI) and multiuser interference (MUI). Further, the receiver algorithms also optimally exploit receiver diversity. We provide performance evaluation of the detectors through detailed simulations. The simulations show that MUD based receivers perform well for multiuser UWB environment. An analytical framework for obtaining closed form expression for the bit error rate (BER) of the above schemes is also discussed.