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。
To understand the features of SAR images comprehensively, the intluence ol movmg 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.
出处
《电光与控制》
北大核心
2017年第4期15-18,57,共5页
Electronics Optics & Control
基金
国家自然科学基金(61171170)
关键词
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
