Synchronization for impulse radio ultra-wideband system

Abstract

Ultra-Wideband (UWB) communication systems provide better performance over conventional wireless communication schemes. Traditionally, RAKE receivers are adopted in UWB receiver to explore rich multi-path components incorporated in the received signal. To improve the performance of a RAKE receiver, two approaches are frequently employed. The first one is to increase the transmitted signal energy, which leads to better performance, but consumes more power. The second one is to capture as much as possible energy in the received signal which achieves better performance without increasing the transmitted pulse energy.In this thesis, a new synchronization scheme based on an efficient detector is proposed. It is shown by performance analysis and simulation that the proposed scheme outperforms traditional schemes.With the improved synchronization algorithm, a new RAKE receiver structure is constructed and analyzed theoretically. The new RAKE structure synchronizes each finger with the proposed synchronization scheme. The theoretical performance shows that with the same input, the new RAKE receiver performs better than conventional ones.