辐射式仿真中脉冲雷达ISAR成像等效模拟方法  

Equivalent Simulation Method for Pulse Radar ISAR Imaging in Radio Frequency Simulation

作　　者：刘晓斌 刘进[1] 刘光军 赵锋[1] 王国玉[1] LIU Xiaobin;LIU Jin;LIU Guangjun;ZHAO Feng;WANG Guoyu(State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, China;Equipment Information Management Center, Equipment Development Department of People＇s Republic of China Central Military Commission, Beijing 100034, China)

机构地区：[1]国防科技大学电子信息系统复杂电磁环境效应国家重点实验室,长沙410073 [2]军委装备发展部装备信息管理中心,北京100034

出　　处：《电子与信息学报》2018年第7期1553-1560,共8页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61101180;61401491;61490692)~~

摘　　要：脉冲雷达信号广泛用于逆合成孔径雷达(ISAR)成像。在辐射式仿真中采用脉冲雷达信号进行ISAR成像时,由于脉宽对应的传播距离远大于微波暗室的空间长度,脉冲回波会在发射信号未被完全辐射之前返回接收机,使得收发信号相互耦合,难以得到ISAR图像。该文提出基于间歇收发的脉冲雷达ISAR成像等效模拟方法,通过将脉冲信号分段发射、分段接收,得到分段稀疏的目标回波。然后,结合压缩感知与间歇收发回波,重构得到ISAR图像。根据等效模拟的实现流程,对仿真与实测数据进行分析,结果表明,该等效模拟方法所得ISAR图像与完整脉冲回波所得图像基本一致,从而验证了等效模拟方法的有效性。Pulse radar signal is widely used in Inverse Synthetic Aperture Radar （ISAR） imaging. However, because the propagation distance obtained by the pulse width is larger than the size of anechoic chamber, target echo returns before the pulse signal is fully transmitted. As a result, the transmitted and reflected signals are coupled and difficult to be separated for ISAR imaging in Radio Frequency Simulation （RFS）. To solve this problem, the equivalent simulation method is proposed for pulse radar ISAR imaging based on Interrupted Transmitting and Receiving （ITR）. As the ITR echo is piecewise sparse in time domain, the ISAR image can be reconstructed based on Compressive Sensing （CS）. Simulation and real data demonstrate that the ISAR image obtained by the proposed method is consistent with that obtained by the complete pulse radar signal. Therefore, the proposed method is effective for ISAR imaging in RFS.

关 键 词：脉冲雷达 ISAR成像 压缩感知 间歇收发 

分 类 号：TN959.1[电子电信—信号与信息处理]