基于非标准Keystone变换的捷变频雷达相参积累算法  

A coherent integration algorithm of frequency-agile radar based on non-standard Keystone transform

作　　者：张亮 杜庆磊[1] 周必雷 瞿奇哲 王永良[1] ZHANG Liang;DU Qinglei;ZHOU Bilei;QU Qizhe;WANG Yongliang(Air Force Early Warning Academy,Wuhan 430019,China;Unit 94326 of the PLA,Ji’nan 250000,China)

机构地区：[1]空军预警学院,湖北武汉430019 [2]中国人民解放军94326部队,山东济南250000

出　　处：《系统工程与电子技术》2023年第12期3836-3844,共9页Systems Engineering and Electronics

基　　金：国家自然科学基金(62001510)资助课题。

摘　　要：针对捷变频雷达(frequency-agile radar,FAR)相参积累难题,提出基于非标准Keystone变换(Keystone transform,KT)的FAR相参积累算法,与标准KT相比,所提算法增加了距离补偿环节,构造了不同的虚拟慢时间。同时,考虑到目标距离信息通常未知,利用距离补偿后信号的周期性,大幅缩小了距离搜索区间。仿真结果表明,所提算法无需目标距离先验信息,能够同时解决捷变频雷达相参积累以及高速运动目标容易出现的跨距离门、多普勒模糊问题,抗噪性能与当前主流的基于压缩感知的捷变频相参积累算法相当,但计算量更低。Aim at the problem of coherent integration in frequency-agile radar(FAR),a coherent integration algorithm of FAR based on non-standard Keystone transform(KT)is proposed.Compared with the standard KT,the proposed algorithm adds a segment of range compensation,and uses a different method for creating virtual slow-time echo.Considering that the range information of target is usually unknown,the algorithm greatly reduces the range search interval,based on the periodicity of range-compensated signal.The simulation results show that the proposed algorithm does not need the prior information of target range,and can solve the problems of coherent integration of coherent integration,range migration and Doppler ambiguity in high-speed moving target.The anti-noise performance is equivalent to the current main frequency-agile coherent integration methods based on compressed sensing,with lower amount of calculation.

关 键 词：捷变频雷达 相参积累 KEYSTONE变换 

分 类 号：TN958[电子电信—信号与信息处理]