Performance Analysis of Rake Receiver with M-BOK Keying in DS-UWB System

In this paper, the principle of M-BOK keying was analyzed and the performance of Rake receiver on direct sequence ultra-wideband (DS-UWB) system was studied, based on a S-V multi-path statistical propagation channel model which can describe propagation characteristic of UWB signal more precisely. The simulation results show that in the UWB channel model, M-BOK keying not only achieves two functions of spreading coding and BPSK modulation, but also improves the system performance. As to different receivers, selective rake (S-Rake) receiver is much more applicable than the Partial Rake (P-Rake) receiver. For S-Rake receiver, there isn´t notable difference between MRC and EGC, but EGC combination could simplify the structure of receiver