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快速定时同步是超宽带(UWB)通信中的关键技术。针对PPM-UWB信号,通过对同步模板信号的合理修改,使用TDT(timing with dirty templates)算法,获得PPM信号的快速同步。在非数据辅助(NDA)和数据辅助(DA)模式下对该算法进行了理论分析,仿真结果表明该算法结构简单,同步精度灵活可变,性能良好。
Fast timing synchronization is a key technique in ultra-wideband (UWB) communications. According to PPM-UWB signals, TDT (timing with dirty templates) algorithm is used to get the synchronization of PPM signals by reasonably modifying the synchronization template signals. The algorithm is theoretically analyzed in non-data-aided (NDA) and data-assisted (DA) modes. The simulation results show that the proposed algorithm has the advantages of simple structure, flexible and variable synchronization accuracy and good performance.