Iterative Low-Complexity Multiuser Detection and Decoding for Coded UWB Systems

In general, ultra wideband (UWB) signals are transmitted using very short pulses in time domain, thus promising very high data rates. In this paper, a receiver structure is proposed for decoding multiuser information data in a convolutionally-coded UWB system. The proposed iterative receiver has three stages: a pulse detector, a symbol detector, and a channel decoder. Each of these stages output soft values, which are used as a priori information in the next iteration. Simulation results show that the proposed system can provide performance very close to a single-user system