基于FPGA的频率捷变雷达目标回波生成系统的设计与分析  

Design and Analysis of Target Echo Signal Generation System for Frequency-Agile Radar Based on FPGA

作　　者：陈旭凯 崔炳喆[1,2] 何广亮 郭展 Chen Xukai;Cui Bingzhe;He Guangliang;Guo Zhan(China Airborne Missile Academy,Luoyang 471009,China;National Key Laboratory of Air-based Information Perception and Fusion,Luoyang 471009,China)

机构地区：[1]中国空空导弹研究院,河南洛阳471009 [2]空基信息感知与融合全国重点实验室,河南洛阳471009

出　　处：《航空兵器》2024年第3期72-77,共6页Aero Weaponry

基　　金：航空科学基金项目(20200001012010;2020Z037012004)。

摘　　要：为提高频率捷变雷达信号处理算法迭代的验证效率,提出一种基于FPGA的频率捷变雷达目标回波生成的设计方法。该方法采用逐项还原回波信号相位的思想,通过建立频率步进波形回波信号数学模型,基于FPGA求解目标相对匀速径向运动时目标回波实时相位,解决了频率捷变信号目标回波的实时生成问题。仿真结果表明,在目标匀速和非匀速两种运动状态下,通过对比有/无速度补偿时目标回波相位变化曲线、目标高分辨率一维距离像以及相邻三帧回波信号的细分辨维距离单元编号,目标匀速运动时经速度补偿的回波相位在-π和π之间呈现线性变化,并且细分辨维距离单元编号在目标匀速和非匀速运动状态下依次相差10和10、9,验证了该回波生成系统的有效性和准确性。In order to improve the verification efficiency of signal processing algorithms for frequency-agile radar,a design method of target echo signal generation for frequency-agile radar based on FPGA is proposed.This method adopts the idea of item-by-item restoration of the echo signal phase,by establishing a mathematical model of the stepped frequency waveform echo signal,it solves the real-time phase of target echo for the target relative uniform radial motion based on FPGA,and the problem of real-time generation of target echo for frequency-agile signals.Simulation results show that in both uniform and non-uniform motion states of the target,the effectiveness and accuracy of the echo generation system is verified.By comparing the target echo phase change curves with and without velocity compensation,the target high-resolution one-dimensional distance image,and the fine-resolution distance cell numbers of the neighboring three frames echo signals,the echo phase with velocity-compensation for uniform velocity motion target is varies linearly between-π and π,and the difference of fine-resolution distance cell numbers is 10 and 10,9 in turn at uniform and non-uniform motion states of the target.

关 键 词：目标回波 频率捷变信号 FPGA 高分辨率一维距离像 目标相对匀速运动 

分 类 号：TJ765.4[兵器科学与技术—武器系统与运用工程]