微波光子四倍频复合雷达信号生成及目标多维度探测  

Frequency-Quadrupled Radar Composite Signal Generation and Multi-Dimensional Target Detection Enabled by Microwave Photonics

作　　者：梁丁丁 陈阳[1] LIANG Ding-ding;CHEN Yang(Shanghai Key Laboratory of Multidimensional Information Processing,School of Communication and Electronic Engineering,East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学通信与电子工程学院上海市多维度信息处理重点实验室,上海200241

出　　处：《电子学报》2022年第4期796-803,共8页Acta Electronica Sinica

基　　金：上海自然科学基金(No.20ZR1416100);国家自然科学基金(No.61971193);区域光纤通信网与新型光通信系统国家重点实验室(北京大学)开放基金(No.2020GZKF005)。

摘　　要：在雷达系统中,为了实现对目标的高精度、多维度测量,产生雷达信号是一个基本而又重要的环节.本文提出了一种微波光子四倍频复合雷达信号产生方法,该复合雷达信号包括单啁啾线性调频信号和单音微波信号.利用单音微波信号和单啁啾线性调频信号实现目标径向速度的测量,使用单啁啾线性调频信号实现目标距离测量和高分辨率微波成像.在发射端,使用微波光子四倍频技术生成了瞬时带宽为2 GHz的正啁啾线性调频信号和频率为13.2 GHz的单音微波信号.在接收端,目标回波信号经去斜后用来实现距离和径向速度测量以及高分辨率逆合成孔径成像.实验结果表明,测量得到的目标的距离和径向速度绝对误差分别不超过4.2 cm和1.7 cm/s,多个探测目标成像结果清晰可辨.In radar systems,to achieve high-precision multi-dimensional measurement of targets,radar signal generation is a basic and important function.A microwave photonic frequency-quadrupled composite radar signal generation approach is proposed.The composite radar signal includes a single-chirped linearly frequency-modulated(LFM)signal and a single-tone microwave signal.The single-tone microwave signal and the single-chirped LFM signal are jointly used to measure the radial velocity of a target,while the single-chirped LFM signal is used to measure the distance of the target and implement the high-resolution microwave imaging.In the transmitter,an up-chirped LFM signal with an instantaneous bandwidth of 2 GHz and a 13.2 GHz single-tone microwave signal are generated using a photonic frequency quadrupler.In the receiver,target echo signals are de-chirped and then used to achieve the measurement of distance and radial velocity and the high-resolution ISAR imaging.Experimental results show that the absolute measurement errors of distance and radial velocity are no more than 4.2 cm and 1.7 cm/s,respectively,and the imaging results of multiple targets are clear and identifiable.

关 键 词：微波光子学 雷达 四倍频信号 距离和速度测量 逆合成孔径成像 

分 类 号：TN95[电子电信—信号与信息处理] TN29[电子电信—信息与通信工程]