基于LFM信号的TDMA网络精密时间同步方法  

TDMA Network Precision Time Synchronization Method Based on LFM Signal

作　　者：王天雄 陈仕进[1] 张玉鹏 闫胜虎[1] WANG Tianxiong;CHEN Shijin;ZHANG Yupeng;YAN Shenghu(The 54th Research Institute of CECT,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所

出　　处：《无线电通信技术》2019年第4期368-373,共6页Radio Communications Technology

基　　金：国家部委基金资助项目

摘　　要：针对多作战单元协同作战对时分多址(TDMA)通信网络时间同步精度的新需求,设计了基于线性调频(LFM)脉冲的TDMA网络精密时间同步方法。利用大时间带宽积的LFM脉冲压缩提高了脉冲到达时间的估计精度;通过设计LFM集中交互的TDMA帧结构,减小了脉冲交互时间,降低了节点间相对运动对时间同步精度的影响。最终仿真和实际平台验证显示,该方法能够将TDMA网络的时间同步精度提高到纳秒量级,可以为其他任务载荷提供高精度时统。A TDMA network precise time synchronization method based on linear frequency modulation(LFM) pulse is designed for the new requirement of cooperative operation by multi-combat units on TDMA network time synchronization accuracy.LFM pulse compression with large BT is used to improve the estimation accuracy of pulse arrival time.The pulse interaction time can be decreased and the influence of relative motion between nodes on time synchronization accuracy can be reduced through designing TDMA frame structure of LFM centralized interaction.Final simulation and actual platform verification show that this method can improve the time synchronization accuracy of TDMA network to the nanosecond level and provide high precision time system for other task loads.

关 键 词：TDMA网络 LFM脉冲 精密时间同步 

分 类 号：TN911.7[电子电信—通信与信息系统]