一种适合PPM-UWB信号的时移TDT同步捕获算法

Time shift TDT timing acquisition algorithm for PPM-UWB

指出TDT(timingwithadirtytemplate)盲同步捕获算法只适于PAM调制(脉冲幅度调制)UWB系统,而不能在PPM调制(脉冲相位调制)UWB系统中应用。提出了一种TS-TDT(time-shift-TDT)盲同步捕获算法,解决了PPM调制UWB系统快速同步捕获问题。该算法通过两条相关支路分别计算接收信号的延迟互相关值而获得同步信息,无需训练序列。理论分析和仿真实验结果表明,该算法结构简单,同步精度灵活可变,性能良好。

It was proved that the TDT （timing with a dirty template） blind timing algorithm was only suitable for PAM-UWB systems rather than PPM-UWB systems. Furthermore, a TS-TDT （time-shift-TDT） blind timing synchronization algorithm was presented for PPM-UWB, which got synchronizing information from calculating the delay cross-correlation values by means of two correlation branches. Theoretical analysis and simulation results demonstrate that the implementation of the algorithm is of low complexity and flexible in precision control.