A Novel Two-Way Relay UWB Network with Joint Non-Coherent Detection in Multipath

In this paper, we propose a decode-and-forward (DF) two-way relay ultra-wideband (UWB) network with a joint-demodulated non-coherent receiver to boost the system throughput. We consider a three nodes relay network with two terminals exchanging information via a relay node during two time slots. After jointly detecting the simultaneously arrived signals, the relay node broadcasts the XORed signal to each terminal. A novel non-coherent receiver with energy detector (ED) is employed and the power allocation optimization is performed based on the result of the approximate effective signal to noise ratio (SNR). Simulation results show that the proposed technique achieves significant improvement over the existing nonrelay and relay schemes on system throughput.