一种Ka波段多通道FMCW SAR数字接收机设计与实现  

Design and Implementation of a Ka Band Multichannel FMCW SAR Digital Receiver

作　　者：孔令振 王辉 郑世超 温靖 KONG Lingzhen;WANG Hui;ZHENG Shichao;WEN Jing(Beijing R&D Center,Shanghai Academy of Spaceflight Technology,Beijing 100086,China;Shanghai Institute of Satellite Engineering,Shanghai 201109,China;School of Information Engineering,Nanchang Hangkong University,Nanchang 330063,Jiangxi,China)

机构地区：[1]上海航天技术研究院北京研发中心,北京100086 [2]上海卫星工程研究所,上海201109 [3]南昌航空大学信息工程学院,江西南昌330063

出　　处：《上海航天（中英文）》2022年第6期118-124,共7页Aerospace Shanghai（Chinese&English）

基　　金：上海航天科技创新基金(SAST2017-106)。

摘　　要：调频连续波体制合成孔径雷达(FMCW SAR)因其体积小、成本低、重量轻及分辨率高的优点越来越受到关注。随着软件无线电技术的迅速发展,数字信号处理机在SAR载荷系统中扮演越来越重要的角色。提出一种多通道Ka波段毫米波SAR数字接收机的设计与实现方法,详细分析了FMCW SAR去调频接收过程,研制出一种基于FPGA的多通道数字接收机平台。以三通道为例,采用多类滤波器级联技术,设计系统软硬件,最后通过系统测试及试验验证了方案的正确性与可行性。Frequency-modulated continuous wave synthetic aperture radar(FMCW SAR)has attracted more and more attention,owing to its advantages of small size,low cost,light weight,and high resolution. With the rapid development of software radio technology,digital signal processor plays an increasingly important role in SAR loading system. In this paper,a Ka band millimeter wave SAR digital receiver is presented. The receiving process of dechirped FMCW SAR is analyzed in detail,and a multi-channel digital receiver platform is proposed based on field programmable gate array(FPGA). Taking three channels as an example,we use the multi-class filter cascade technology to design the software and hardware of the system. Finally,the correctness and feasibility of the scheme are verified by the system test and experiment.

关 键 词：KA 调频连续波体制合成孔径雷达(FMCW SAR) 去调频 三通道 滤波器级联 

分 类 号：TN74[电子电信—电路与系统]