A 2-D Method Based on Nonlinear Frequency Modulation Waveform and Phase Coding for Range Ambiguity Suppression

被引：2

作者：

Wang, Yuhao ^{[1
,2
]}

Wang, Wei ^{[1
]}

Deng, Yunkai ^{[1
]}

Zhang, Yongwei ^{[1
]}

Zhao, Pengfei ^{[1
]}

Zhang, Heng ^{[1
]}

机构：

[1] Chinese Acad Sci, Aerosp Informat Res Inst, Dept Space Microwave Remote Sensing Syst, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Sch Elect Elect & Commun Engn, Beijing 100049, Peoples R China

来源：

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2023年 / 20卷

关键词：

Azimuth phase coding (APC); nonlinear fre-quency modulation (NLFM) waveform; range ambiguity; syn-thetic aperture radar (SAR); waveform diversity; SAR;

D O I：

10.1109/LGRS.2022.3233706

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Range ambiguity suppression is a key technical challenge for synthetic aperture radar (SAR) systems. Waveform diversity technology is a potential solution due to its low system complexity. In this letter, a 2-D method based on orthogonal nonlinear frequency modulation (NLFM) waveform and azimuth phase coding (APC) for range ambiguity suppression is proposed. This approach not only suppresses range ambiguity energies instead of dispersing them, but also works for multiple consecutive orders of range ambiguity energies. The imaging processing and range ambiguity suppression performance are described in detail. In addition, the range-ambiguity-to-signal radio (RASR) is analyzed, and the simulation results for the point target and distribution scenarios are given to verify the effectiveness and practicality of the proposed scheme.

引用

页数：5

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