Robust Detectors for TH IR-UWB Systems with Multiuser Interference

It has been recently established that multiuser interference (MUI) in time-hopping impulse-radio ultra-wideband (TH IR-UWB) systems is highly impulsive and hence the conventional matched filter (MF) receiver based on the assumption of Gaussian MUI is no longer optimum. In this paper, two novel receiver structures for detecting TH IR-UWB signals in the presence of MUI are proposed. The first detector is based on a two-term approximation for the distribution of the interference process and noise and the second uses a non-linear penalty function for the decision statistic. Simulation results show that the proposed detectors perform considerably better than the conventional MF receiver and also outperform a recently devised soft-limiting detector in MUI limited environments.