A Novel Airborne SAR MOCO Algorithm Based on Optimal Weighting Doppler Frequency Modulation Rate Estimation

被引：0

作者：

Ling, Qing ^{[1
]}

Ma, Jingtao ^{[2
]}

Lu, Qing ^{[3
,4
]}

Huang, Penghui ^{[1
]}

Xia, Xiang-Gen ^{[5
]}

Liu, Yanyang ^{[4
]}

Liu, Zhiling ^{[6
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Elect Informat & Elect Engn, Shanghai 200240, Peoples R China

[2] Shanghai Normal Univ, Coll Informat Mech & Elect Engn, Shanghai 201418, Peoples R China

[3] Northwestern Polytech Univ, Sch Elect & Informat, Xian 710129, Peoples R China

[4] Shanghai Inst Satellite Engn, Shanghai 200090, Peoples R China

[5] Univ Delaware, Dept Elect & Comp Engn, Newark, NJ 19716 USA

[6] Nanjing Elect Equipment Inst, Nanjing 211103, Peoples R China

来源：

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2024年 / 21卷

关键词：

Doppler effect; Frequency modulation; Estimation; Synthetic aperture radar; Modulation; Frequency estimation; Accuracy; Aircraft; Azimuth; Error analysis; Airborne synthetic aperture radar (SAR); Doppler frequency modulation rate; map-drift (MD); motion compensation (MOCO); optimal weighting;

D O I：

10.1109/LGRS.2024.3479448

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：

This letter proposes a novel airborne synthetic aperture radar (SAR) motion compensation (MOCO) method based on the optimal weighting Doppler frequency modulation rate estimation. According to the traditional map-drift (MD) algorithm, the Doppler frequency modulation rate corresponding to the range units can be estimated through azimuth sub-aperture signals. The utilization rate for range units and the contributions of the strong scattering units can be improved by using the proposed optimal weighting on the signal amplitude, increasing the estimation accuracy of the Doppler frequency modulation rate. The platform motion error can be effectively estimated through fitting the Doppler frequency modulation rate and each initial slant range based on least square processing. Real-measured high-resolution airborne SAR data validate the effectiveness and feasibility of the proposed algorithm.

引用

页数：5

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