A method of combating timing jitter in UWB system

摘要

Ultra wideband (UWB) system is sensitive to timing jitter because of the extremely short duration of the pulses it employs. The effects of timing jitter on the performance of UWB system have been studied in many literatures. The results show that relatively modest timing jitter can markedly degrade the system throughput, bit error ratio (BER) performance and multiple-access performance, and it even can disable the correlation receiver in severe condition. So, measures should be taken to mitigate the effects caused by timing jitter. In this paper, a method of combating timing jitter by introducing additional modification to the conventional reference waveform at the receiver that is used to correlate with the received waveform is presented. The mathematical formulae of the additional modification corresponding to normal distribution of timing jitter are derived. The results of simulation show that the method adopting modified correlation template outperforms the method use conventional correlation template in BER performance, especially for the large amount of timing jitter in UWB correlation receiver.