Unambiguous SAR Imaging Algorithm Via Spotlight Mode for Multichannel SAR Systems

被引：0
|
作者：
Guo, Xiaojiang [1 ]
Gao, Yesheng [1 ]
Wang, Kaizhi [1 ]
Liu, Xingzhao [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Shanghai, Peoples R China
来源：
2016 IEEE RADAR CONFERENCE (RADARCONF) | 2016年
关键词：
azimuth ambiguity suppression; spotlight mode; high resolution; wide swath; multichannel SAR; WIDE-SWATH SAR;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Azimuth multichannel synthetic aperture radar (SAR) systems are capable of high-resolution and wide-swath (HRWS) imaging. This paper presents a novel unambiguous SAR imaging algorithm via spotlight mode for multichannel SAR systems. It's derived that the least unambiguous pulse repetition frequency (PRF) is the function of azimuth width of the illuminated area. By constructing spotlight SAR signals via digital beamforming (DBF) from multiple azimuth receivers, the wide azimuth imaging area can be divided into multiple narrow azimuth areas. Therefore, the least unambiguous PRF for the generated spotlight SAR signals could be reduced and unambiguous SAR images can be obtained by spotlight SAR imaging algorithms. Theoretical analysis and experiments based on real measurements from an airborne multichannel SAR system showed the simplicity and efficiency of the proposed imaging method.
引用
收藏
页码：1000 / 1003
页数：4
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