运动补偿与U WB SAR中RD成像算法结合的实现方法

Airborne SAR Motion Compensation Based on RD Algorithm

分析了机载合成孔径雷达(SAR)中载机运动误差对接收信号的影响,指出在运动补偿处理中可以将距离向误差分解为空不变项和空变项,在此基础上采用一阶和二阶运动补偿的方法来对两个误差项进行补偿。为了将测量的运动误差数据应用到高分辨率成像中,提出了一种与距离多普勒(RD)成像算法相结合的运动补偿方案。通过对仿真数据的测试,本文方法得到了验证。

This paper analyzes how the trajectory deviations in the airborne synthetic aperture radar (SAR) can affect the received data. It shows that the range error can be separated into space invariant and variant contributions, which can be compensated by the first-order and second-order motion compensation processing. To realize high resolution SAR image, this paper represents a motion compensation method integrated in range-Doppler (RD) algorithm. Finally, the analysis and scheme are validated by the results on simulated data.