分布式相参雷达高精度时间同步单元的设计  

Design of a high-precision time synchronization unit for distributed coherent radar

作　　者：宋启栋 彭良福[1] SONG Qidong;PENG Liangfu(College of Electronics and Information,Southwest Minzu University,Chengdu 610200,China)

机构地区：[1]西南民族大学电子信息学院,成都610200

出　　处：《兵器装备工程学报》2023年第S01期389-392,共4页Journal of Ordnance Equipment Engineering

基　　金：中央高校基本科研业务费专项资金项目(2022NYXXS097)。

摘　　要：为了提高分布式相参雷达的时间同步精度,利用FPGA使用灵活和并行执行的特点,设计了一种基于时间数字转换和恒比定时时刻鉴别法的高精度时间同步单元。叙述了高精度时间同步单元的硬件设计方案和软件实现流程。测试结果表明,应用恒比定时时刻鉴别法将时间间隔的测量精度平均提高了1.787 ns,时间同步单元的测量精度可达1 ns,分辨率为90 ps。In order to improve the time synchronization accuracy of distributed coherent radar,this paper designs a high-precision time synchronization unit based on time-to-digital conversion and constant-ratio time discrimination method by using FPGA flexible and parallel execution.The hardware design scheme and software implementation process of the high-precision time synchronization unit are described in detail.The test results show that the measurement accuracy of the time interval increases by 1.787 ns on average,and the measurement accuracy of the time synchronization unit reaches 1 ns,with a resolution of 90 ps.

关 键 词：分布式相参雷达 高精度时间同步 时间间隔测量 恒比定时 脉冲整形 

分 类 号：TN957[电子电信—信号与信息处理]