摘要
运动误差补偿影响杂波抑制、多普勒参数估计和目标聚焦成像,是双基地合成孔径雷达地面运动目标检测(synthetic aperture radar-ground moving target indication,SAR-GMTI)的一项关键技术。根据星机双基地系统的特点,提出了一种有效的运动误差分析和补偿方法。从星机双基地SAR-GMTI的运动误差几何模型出发,分析出误差对运动目标参数的影响,并给出了相应的补偿因子。特别针对地势起伏和斜视角不能忽略的情况,分析了误差补偿的偏移量并提出了有效的补偿方法。最后,计算机仿真验证了所提方法的有效性。
Due to the effect on clutter suppression,Doppler parameters estimation and target focus imaging,motion error compensation is a key technology to bistatic synthetic aperture radar-ground moving target indication（SAR-GMTI）.An effective method of motion error analysis and compensation is presented based on the characters of spaceborne-airborne bistatic systems.According to the spaceborne-airborne bistatic SAR-GMTI signal geometry,the influence of error on the parameters of moving target is deduced,and the corresponding compensation factors are also proposed.Especially for the cases when relief and squint cannot be ignored,an offset error compensation is analyzed and an effective compensation is given.Finally,the simulation results show the effectiveness of the method.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2012年第5期925-930,共6页
Systems Engineering and Electronics
关键词
合成孔径雷达
运动目标检测
杂波抑制
误差分析
运动补偿
synthetic aperture radar（SAR）
moving target detection
clutter suppression
error analysis
motion compensation
