岸空双基地高频/甚高频雷达同步控制器设计与实现  

Design and implementation of shore-air bistatic HF/VHF radar synchro controller

作　　者：陈泽宗[1] 陈家彬 赵晨[1] 谭钓 Chen Zezong;Chen Jiabin;Zhao Chen;Tan Diao(School of Electronic Information,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学电子信息学院,武汉430072

出　　处：《电子测量技术》2022年第12期85-90,共6页Electronic Measurement Technology

基　　金：国家自然科学基金面上项目(61871296);国家重点研发计划项目(2017YFF0206404,2016YFC1400504)资助。

摘　　要：岸空双基地高频/甚高频雷达系统岸发空收,收发两站对时间、频率和相位同步精度要求高,实现难度大,且接收站对同步控制器体积和质量都有较高的要求。本文基于数字信号处理和可编程逻辑门阵列以及GPS(DSP+FPGA+GPS)设计了岸空双基地高频/甚高频雷达系统的同步控制器,通过GPS信号中的UTC信息和PPS信号来保证双站时间同步,使用FPGA结合PPS信号对独立的高稳晶振进行校准,保证双站频率和相位同步;简化了硬件结构,便于整个接收系统的集成,并且同步控制参数可灵活选择,启动时间灵活可控。在收发两站各设一套相同的同步控制器进行性能测试,结果表明设计的同步控制器实现了收发两站的时间、频率和相位同步,产生的时序控制信号精准,双站同步精度控制在5 ns以内,时序上能保证双基地雷达系统的相干性,并且体积小、质量轻、使用方便,完全满足岸空双基地高频/甚高频雷达系统的要求。In the shore-air bistatic HF/VHF radar system,the sending and receiving station have high requirements on the synchronization accuracy of time,frequency and phase,and it is difficult to realize,and the receiving station has high requirements on the size and weight of the synchro controller.In this paper,the synchro controller of shore-air bistatic HF/VHF radar system is designed based on digital signal processing,programmable logic gate array and GPS(DSP+FPGA+GPS).The UTC information and PPS signal in GPS signal is used to ensure the time synchronization of the two stations,and the independent high stable oscillator is calibrated by FPGA combined with PPS signal to ensure the frequency and phase synchronization of the two stations.The hardware structure is simplified to facilitate the integration of the whole receiving system,and the synchronization control parameters can be flexibly selected,and the startup time is flexible and controllable.In sending and receiving two stations set up the same synchro controller performance testing,the results show that the synchro controller realizes the synchronization of time,frequency and phase of the two stations,and the timing control signals generated are accurate,the synchronization accuracy of two stations is under 5 ns,the coherence of bistatic radar system can be guaranteed in timing,and small in size,light in weight,easy to use,which fully meets the requirements of air-shore bibase HF/VHF radar system.

关 键 词：岸空双基地高频/甚高频雷达 同步控制器 DSP FPGA GPS 

分 类 号：TN952[电子电信—信号与信息处理]