毫米波SAR DBF-SCORE成像算法及系统级验证  

Millimeter SAR DBF-SCORE Imaging Algorithm and System-Level Verification

作　　者：吴思利 王辉 WU Sili;WANG Hui(Shanghai Institute of Satellite Engineering,Shanghai 201109,China)

机构地区：[1]上海卫星工程研究所,上海201109

出　　处：《上海航天（中英文）》2021年第2期113-118,共6页Aerospace Shanghai（Chinese&English）

摘　　要：分辨率和幅宽是成像雷达的核心指标。面向当今高分宽幅的任务趋势,基于毫米波的多通道合成-扫描接收体制是实现宽幅数据获取的有效技术途径,具有实践价值。除了单一通道成像的基本策略之外,机载多通道成像不但要完成运动补偿,还需要根据实际回波特性实现多通道数据的有效校正与合成。本文针对Ka毫米波多通道系统的实测数据进行了具有较高稳健性的多通道合成成像处理,实现了良好的聚焦效果与全幅宽信噪比提升,为未来多通道雷达成像系统的大范围应用乃至在轨实时合成成像提供了一定的参考。Resolution and swath are two key parameters for imaging radar.In terms of the mission requirements of high resolution and wide swath,it is of practical significance to use the millimeter-based digital beam forming scan-onreceive technique to obtain wide swath data.More complicated than the single-channel synthetic aperture radar(SAR)imaging strategy,airborne multi-channel imaging needs not only motion compensation but also data calibration and beam forming according to the echo properties.In this paper,the measured data of the Ka millimeter wave multichannel system are processed by a highly robust multi-channel composite imaging process,and a good focusing effect and an improved full-width signal-to-noise ratio are obtained.It provides a certain reference for the large-scale application of the future multi-channel radar imaging system and even real-time synthetic imaging in orbit.

关 键 词：合成孔径雷达 雷达成像 数字波束合成 宽幅 毫米波 

分 类 号：TN957.51[电子电信—信号与信息处理] TP945.12[电子电信—信息与通信工程]