摘要
为了实现星载合成孔径雷达(SAR)轻小型化,可将调频连续波技术和SAR技术相结合实现硬件需求的降低。本文给出了双星Ka波段调频连续波合成孔径雷达(Ka FMCW SAR)的系统方案和参数设计,通过噪声等效散射系数(NESZ)、距离模糊(RASR)、方位模糊(AASR)的参数仿真和成像结果分析证明该系统设计是可行的。同时,对双星Ka FMCW SAR系统也初步考虑了星间同步和内定标技术。在之前研究的机载Ka FMCW SAR成像算法的基础上,提出使用改进的ωk算法进行多点目标成像仿真,系统参数仿真和成像仿真结果表明了对所设计的Ka波段双星FMCW SAR系统的可行性。
The frequency modulated continuous wave(FMCW)technology and the synthetic aperture radar(SAR)technology can be combined to reduce the hardware demands so as to realize the lightweight and miniaturization of spaceborne synthetic aperture radar(SAR).In this paper,a bi-satellite Ka FMCW SAR system is proposed,and the parameters are designed.Parameter simulations of the noise-equivalent sigma-zero(NESZ),range ambiguity to signal ratio(RASR),azimuth ambiguity-to-signal ratio(AASR)and imaging result analyses are carried out.The results show that the proposed system is feasible.Meanwhile,intersatellite synchronization and internal calibration technologies are also considered for the bi-satellite Ka FMCW SAR system preliminarily.Besides,based on the airborne Ka FMCW SAR imaging algorithm studied previously,an improvedωk algorithm for multi-point targets is put forward.The system parameter simulation and imaging simulation results show the feasibility of the designed bisatellite Ka FMCW SAR system.
作者
陈翔
王辉
郑世超
冯利鹏
CHEN Xiang;WANG Hui;ZHENG Shichao;FENG Lipeng(Shanghai Key Laboratory of Remote Sensing and Millimeter Wave Information Acquisition and Application Technology,Shanghai Institute of Satellite Engineering,Shanghai 201109,China)
出处
《上海航天（中英文）》
CSCD
2021年第S01期61-66,共6页
Aerospace Shanghai（Chinese&English）
基金
“上海市毫米波空天信息获取及应用技术重点实验室”项目资助
关键词
Ka
FMCW
SAR
系统设计
双星SAR
成像
Ka frequency modulated continuous wave(FMCW)synthetic aperture radar(SAR)
system design
bi-satellite SAR
imaging
作者简介
陈翔(1995—),男,硕士,主要研究方向为SAR信号处理;通信作者:王辉(1972—),女,博士,研究员,主要研究方向为星载毫米波SAR系统体制。
