超宽带通信同步的研究

The Study of Synchronization for UWB Communication

针对TH调制PPM超宽带(UWB)系统,给出一种解决IR-UWB通信系统信号捕获和定时同步方法。这种方法基于导频脉冲序列,接收机使用与导频脉冲序列相匹配的相关滤波器,通过观察相关器的输出信号,可以估计导频序列的存在,此外,相关器输出的峰值可以使接收机与发射机时间对齐,从而达到同步。采用仿真与理论分析相结合的方法,详细分析了AWGN和多径信道下的同步性能,结果表明,理论分析和仿真结果相吻合,利用导频脉冲序列在各种信道下均可获得很好的同步。

In this paper, a simple method of signal acquisition and time-synchronization for TH-PPM-UWB communication systern is given. The receiver utilizes the eorrelator which matches to the pilot pulsed sequence. The existence of the pilot pulsed can be displayed by the output of eorrelator. Synchronization of receiver and transmitter can be attained by the peak value of eorrelator. For AWGN and multipath channels, theoretieal analysis is consistent with simulation results. Furthermore the simulation results indicate that the pilot pulsed synchronization scheme can achieve satisfactory performance.