电光与控制, 2017, 24 (4): 15, 网络出版: 2021-01-25
运动目标对SAR成像影响的量化分析
Quantized Analysis to Influence of Motion Targets on SAR Imaging
合成孔径雷达 运动目标 量化分析 驻定相位定理 Synthetic Aperture Radar (SAR) moving target quantized analysis stationary phase principle
摘要
为全面了解SAR成像特性, 研究了运动目标对SAR成像的影响。首先分析了匀加速运动和匀速转动两种典型运动形式的目标对方位成像的影响, 并给出了运动目标方位向成像特性的表达式, 然后通过解线频调得到了因多普勒频移而产生的距离向走动量表达式。理论分析和仿真表明:运动目标对SAR方位成像影响较大, 对距离成像影响很小。研究结果有助于深刻理解运动目标的SAR成像特性。
Abstract
To understand the features of SAR images comprehensively, the influence of moving targets on SAR imaging is studied. First, analysis is made to the influence of uniformly-accelerating and uniformly-turning targets on SAR imaging in azimuth direction. The expressions of the moving features are derived. Afterwards, the expression of the skewing in distance produced by Doppler shift is derived by dechirping. Theoretical analysis and simulation results show that the moving targets have great influence on azimuth image and small influence on distance image. The research results are useful for understanding the change of moving target's SAR images.
周阳, 毕大平, 沈爱国, 房明星. 运动目标对SAR成像影响的量化分析[J]. 电光与控制, 2017, 24(4): 15. ZHOU Yang, BI Da-ping, SHEN Ai-guo, FANG Ming-xing. Quantized Analysis to Influence of Motion Targets on SAR Imaging[J]. Electronics Optics & Control, 2017, 24(4): 15.