基于PRT与频率联合调制的随机跳频雷达成像方法  

An Imaging Method of Random Frequency-Hopping Radar Based on Joint Modulation of PRT and Frequency

作　　者：胡杰民 滕俊鹏 邹博 杨旭 HU Jiemin;TENG Junpeng;ZOU Bo;YANG Xu(School of Information Science and Technology,Zhejiang Sci-Tech University,Hangzhou 310000,China;Army Aviation Research Institute,Beijing 101000,China)

机构地区：[1]浙江理工大学信息学院,杭州310000 [2]陆军航空兵研究所,北京101000

出　　处：《电光与控制》2024年第1期21-27,共7页Electronics Optics & Control

基　　金：XXXX实验室基金(WDZC2020550XXXX)。

摘　　要：随机跳频是一种抗干扰能力强、截获概率低的高性能的信号波形。然而,传统随机跳频信号对目标运动敏感,目标运动与频率调制相互耦合将在回波中引入相位高次项,导致距离像散焦。鉴于此,提出一种基于PRT与频率联合调制的随机跳频雷达成像方法,在常规随机跳频波形的基础上,通过改变脉冲重复周期消除了运动与频率的高次耦合项,再利用核函数相关法并结合FFT快速成像,成像过程避免了对目标速度的估计步骤,减小了计算量,有利于工程实现。利用仿真数据和实测数据对方法进行了验证,实验结果证明了方法的有效性。Random frequency-hopping is a high-performance signal waveform with high anti-interference capability and low interception probability.However,the conventional random frequency-hopping signal is sensitive to target motion,the coupling of target motion and frequency modulation will introduce the phase high-order term in the echo,leading to range profile defocusing.In view of this,this paper proposes a random frequency-hopping radar imaging method based on the joint modulation of Pulse Repetition Time(PRT)and frequency,which eliminates the high-order coupling term of motion and frequency by changing the pulse repetition time based on the conventional random frequency-hopping waveform.Then,the kernel function correlation method and Fast Fourier Transform(FFT)are used for fast imaging,and the imaging process avoids the estimation of the target velocity,which reduces the computational amount and facilitates the engineering implementation.The simulation data and the measured data are used to verify the algorithm,and the experimental results verify the effectiveness of the algorithm.

关 键 词：雷达探测 脉冲重复时间(PRT) 随机跳频 高分辨距离像 波形设计 

分 类 号：TN95[电子电信—信号与信息处理]