A pre-RAKE system is proposed for the direct sequence (DS) UWB communications to capture the energy effectively in multipath channels. Based on the pre-RAKE technique, the equivalent performance of RAKE with MRC can be achieved using a receiver with only one finger. Compared to the previous research on Pre-RAKE UWB, we consider continuous chip transmission and study the effect of inter-chip interference under lognormal multipath fading channels. Numerical results are provided for cases with and without inter-chip interference to show the tradeoff between the data rate and the BER performance.
['Wei Cao', 'Arumugam Nallanathan', 'Chin Choy Chai']
WLC28-1: On the Tradeoff between Data Rate and BER Performance of Pre-RAKE DS UWB System