A novel timing jitter robust UWB impulse radio system

Abstract

Traditional ultra-wideband (UWB) impulse radio system is sensitive to timing jitter effect, as a result precise synchronization is required. Our previous study shows that a simple "sample and compare'' high-speed UWB receiver is an effective scheme to combat timing jitter. In this paper, we extend our previous study by using the maximum absolute sampling value as the decision variable and derive the corresponding threshold optimization algorithm by means of a version of the Kiefer-Wolfowitz algorithm with expanding truncations and randomized differences. The new algorithm is robust under timing jitter and no knowledge of the channel gains is required. Convergence of the algorithm is analyzed. Simulation results show that the new algorithm has better performance than previous one