脉冲体制毫米波SAR多通道信号处理方法研究  

Research on Multi-channel Signal Processing Method for Pulsed Millimeter-Wave SAR

作　　者：吴思利 王辉 肖明喜 郭禹杉 付玉龙 WU Sili;WANG Hui;XIAO Mingxi;GUO Yushan;FU Yulong(Shanghai Key Laboratory of Remote Sensing and Millimeter Wave Information Acquisition and Application Technology,Shanghai Institute of Satellite Engineering,Shanghai 201109,China;Key Laboratory of Millimeter Imaging,Shanghai Academy of Spaceflight Technology,Shanghai 201109,China)

机构地区：[1]上海卫星工程研究所上海市毫米波空天信息获取及应用技术重点实验室,上海201109 [2]上海航天技术研究院毫米波成像技术重点实验室,上海201109

出　　处：《上海航天（中英文）》2022年第3期107-115,共9页Aerospace Shanghai（Chinese&English）

摘　　要：为实现高分辨率、宽测绘带的综合观测目的,以毫米波频段多通道合成孔径雷达(SAR)信号模型为基础,对同时具备距离多通道、方位多通道的SAR成像处理流程进行分析,针对非均匀通道重构容易受到姿态误差影响的问题,引入惯导设备姿态数据实现参数校准,并基于上海卫星工程研究所Ka频段多通道SAR机载挂飞数据完成方法验证。数据处理结果表明:通过二维多通道数据处理,能够有效改善欠采样下的SAR图像方位模糊特性并优化噪声特性,提升图像可判读性。研究结果可为毫米波多通道SAR成像系统的研制与应用处理提供参考。In order to achieve the comprehensive observation with high resolution and wide swath,the processing flow for synthetic aperture radar(SAR)imaging with both range multi-channel and azimuth multi-channel is analyzed based on the multi-channel SAR signal model in the millimeter wave band. In view of the problem that the non-uniform channel reconstruction is easily affected by attitude errors,the inertial navigation equipment attitude data are introduced to achieve parameter calibration. The method is verified based on the Ka-band multi-channel SAR airborne flight data of Shanghai Institute of Satellite Engineering. The data processing results indicate that the azimuth ambiguity characteristics of SAR images under under-sampling can be effectively improved,the noise characteristics can be optimized through two-dimensional multi-channel data processing,and thus the interpretability of the images is much improved. The research results can provide a reference for the development and application of millimeter-wave multichannel SAR imaging system.

关 键 词：毫米波 合成孔径雷达(SAR) 多通道 模糊抑制 数据重构 

分 类 号：TN911.73[电子电信—通信与信息系统] TP391.9[电子电信—信息与通信工程]