一端固定的双站SAR体制下基于距离补偿的毫米波快速成像算法  

A millimeter-wave fast imaging algorithm with range compensation for onestationary bistatic SAR

作　　者：陈旭[1] 杨琪 曾旸 王宏强[1] 邓彬[1] CHEN Xu;YANG Qi;ZENG Yang;WANG Hong-Qiang;DENG Bin(College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073

出　　处：《红外与毫米波学报》2022年第1期294-298,共5页Journal of Infrared and Millimeter Waves

基　　金：Supported by the National Natural Science Foundation of China(61871386,62035014,61921001).

摘　　要：本文提出了一种一端固定的双站SAR(OS-BiSAR)体制下基于距离补偿的毫米波快速成像算法。在图像重构过程中,该算法通过保留回波模型中的幅度衰减因子来补偿信号传播衰减,并根据目标回波方程特性对接收阵列维执行了卷积操作,最后通过快速傅里叶变换(FFT)以及相干累加等步骤求解出最终目标图像。仿真分析和实验结果表明,与OS-BiSAR体制下基于距离补偿的距离徙动算法(RMA)相比,所提算法不仅可以保证图像重构效率,还能更显著地降低信号沿空间路径的传播损耗对成像质量带来的影响。In this article,an improved millimeter-wave fast imaging algorithm with range compensation for onestationary bistatic synthetic aperture radar(OS-BiSAR)is presented.During the process of image reconstruction,the amplitude attenuation factor of the echo model is retained for the compensation of signal propagation loss,and the convolution operation is performed on the receiving array dimension according to the characteristics of the tar⁃get echo equation.Finally,the target image can be solved by fast Fourier transform(FFT)and coherent accumu⁃lation steps.Simulation analysis and experimental results show that,compared to the range migration algorithm(RMA)with range compensation,the proposed algorithm can not only guarantee the efficiency of image recon⁃struction,but also significantly reduce the influence of signal propagation loss on the image quality.

关 键 词：毫米波快速成像算法 距离补偿 一端固定的双站SAR 快速傅里叶变换 

分 类 号：TN95[电子电信—信号与信息处理]