The Weights Design of the Rake Combiner for UWB Digital Rake Receiver

Abstrcat We first investigate the correlation of the noise in the captured multi-path energy, and then propose a wide sense Maximal ratio (WSMR) algorithm to determine the weights of the Rake combiner in a dense multi-path indoor UWB channel. WSMR method is compared with MR, MMSE methods under channels generated by the IEEE802.15 channel model CM1～CM4. Simulation results show that the proposed WSMR Rake with MMSE equalizer has the same performance as MMSE Rake receiver in CM1 and CM2 channels, and is superior to the MR in all examined channels. Simulations consist with the theoretical analysis and verify the usefulness of the WSMR algorithm for UWB Rake receiver designing.