雷达学报2019，Vol.8Issue(1)：64-72,9.
基于参数估计的高分辨率SAR运动目标距离徙动校正方法
A New Approach to Range Cell Migration Correction for Ground Moving Targets in High-resolution SAR System Based on Parameter Estimation
摘要
Abstract
Range Cell Migration Correction (RCMC) represents an important advance in moving target imaging in the airborne single antenna high-resolution SAR system. In this paper, we propose a new four-step RCMC approach combined with parameter estimation that overcomes the drawbacks of high computation and low accuracy in high-resolution. First, we use the Hough transform and the energy balancing method to estimate the range velocity and correct the range walk. Next, we perform a range curvature correction in the range-Doppler domain by using the initial Doppler rate. Thirdly, we accurately estimate the Doppler rate using Map-drift technology. Finally, we correct the residual range curvature by the accurate Doppler rate. Compared with traditional algorithms, the proposed method requires less computation and is robust in the high-resolution SAR system. In this paper, we present a mathematical model and validate its effectiveness using both simulation and real data.关键词
合成孔径雷达/ 高分辨率/ 动目标成像/ 距离徙动校正/ 参数估计/Key words
Synthetic Aperture Radar (SAR)/ High-resolution/ Ground Moving Target Imaging (GMTIm)/ Range Cell Migration Correction (RCMC)/ Parameter estimation/分类
信息技术与安全科学引用本文复制引用
王超,王岩飞,刘畅,刘碧丹..基于参数估计的高分辨率SAR运动目标距离徙动校正方法[J].雷达学报,2019,8(1):64-72,9.基金项目
国家重点研发计划(2017YFB0503001)，国家自然科学基金(61471340) （2017YFB0503001）
