Multiuser detection based receivers for diversity enhancing UWB systems

Abstract

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 diversity enhancing UWB multiuser communication systems. The algorithms exploit inherent multipath diversity and mitigate the effects of both inter symbol interference (ISI) and multiuser interference (MUI). Further more, the receiver algorithms also optimally exploit diversity. We also propose a coded transmission scheme for the MIMO-UWB system for exploiting transmit diversity. We provide performance evaluation of the detectors through detailed analysis and simulations for synchronous and asynchronous users. An analytical framework for obtaining closed form expression for the bit error rate (BER) of the above schemes is also discussed.