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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。
Aiming at TH modulated PPM UWB system, a method of signal acquisition and timing synchronization for IR-UWB communication system is given. This method is based on the pilot pulse sequence and the receiver uses a correlation filter that matches the pilot pulse sequence to estimate the presence of the pilot sequence by observing the output signal of the correlator. In addition, the peak of the correlator output allows reception Machine and transmitter time alignment, so as to achieve synchronization. The simulation and theoretical analysis are combined to analyze the synchronization performance of AWGN and multipath channel in detail. The results show that the theoretical analysis and simulation results are in good agreement. The pilot pulse sequence can obtain good Synchronize.