Multipath decision fusion for low complexity UWB-IR non-coherent receivers

In UWB Impulse Radio (UWB-IR), non coherent reception with energy collection might suffer from dispersive channels. This paper proposes an energy selective receiver based on a threshold device. Multipath detection decisions are weighted by a confidence coefficient and combined, following an optimum Bayesian decision rule that takes into account both multipaths and symbol coding. Simulations on realistic channels show that this low complexity receiver outperforms energy collectors and provides performances close to quasi-optimum non coherent receivers.