基于多普勒调频率的机载条带SAR运动补偿  

Motion Compensation of Airborne Strip-map SAR Based on Doppler Rate

作　　者：黄源宝[1] 保铮[1] 

机构地区：[1]西安电子科技大学雷达信号处理国防科技重点实验室

出　　处：《现代雷达》2006年第3期28-30,35,共4页Modern Radar

基　　金："十五"预研基金(No:413070502);微波成像重点实验室基金(No:51442010301DZ01)

摘　　要：提出了基于多普勒调频率的机载条带SAR运动补偿方法。该方法利用多普勒调频率随斜距的分布规律从多普勒调频率的估计值中解算出载机的运动参数,从而可在一定条件下代替由惯性测量元件组成的运动测量系统。它还用相位补偿代替插值来完成沿理想航迹的速度波动的补偿,从而节省了运算量,避免了插值带来的图像质量的下降。理论分析和实测数据成像证明了该方法的正确性和有效性。A new method for the motion compensation of the airborne strip-map SAR is presented. The motion parameters are computerized from the estimated Doppler rates which are distributed along the range according to the motion of the phase center. So a spohisticated motion measurement system is unnecessary in certain conditions. Another advantage of this algorithm is that the phase compensation rather than the complex interpolation is involved in the compensation of the variation of the along track veolcity, hence the high computational efficiency and the improved image quality. Theoretical analysis and the real data images show that it is of great value in real-time imaging.

关 键 词：合成孔径雷达 运动补偿 多普勒调频率 

分 类 号：V243.2[航空宇航科学与技术—飞行器设计]