基于RD算法的横向规避弹道弹载SAR成像

Journal of Systems Engineering and Electronics ›› 2010, Vol. 32 ›› Issue (4): 729-733.

基于RD算法的横向规避弹道弹载SAR成像

秦玉亮, 王建涛, 王宏强, 黎湘

（国防科学技术大学电子科学与工程学院，湖南长沙 410073）

出版日期:2010-04-23 发布日期:2010-01-03

Range-Doppler algorithm-based missile-borne SAR imaging with lateral avoidance trajectory

QIN Yu-liang, WANG Jian-tao, WANG Hong-qiang, LI Xiang

(School of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China)

Online:2010-04-23 Published:2010-01-03

摘要/Abstract

摘要：

首先建立了通用的曲线弹道合成孔径雷达(synthesis aperture radar, SAR)回波信号模型，分析了加〖JP2〗速度引入的相位误差，推导了是否进行曲线弹道补偿的定量条件;然后针对横向规避弹道情况，分析了弹载SAR回波信号的特点，并根据弹载SAR的特点进行了合理近似，设计了基于距离多普勒算法的成像方法。该算法与直线孔径下的距离多普勒算法相比，仅仅修改了部分相位因子，没有因为孔径的非直线增加成像算法的复杂性。

Abstract:

The general relative range model for non-linear trajectory is built firstly, followed by the maneuver induced phase errors analysis The quantitative conditions of ignoring these errors are deduced later. Then this paper concerns on the issue of missile-borne SAR in the trajectory with lateral maneuver: the characteristics of signals are analyzed and a range-Doppler based algorithm is presented according to these characteristics. Compared with the range-Doppler algorithm under linear aperture, the new one just modifies some phase correction factors and needs no additional complexity owing to nonlinear aperture.

秦玉亮, 王建涛, 王宏强, 黎湘. 基于RD算法的横向规避弹道弹载SAR成像[J]. Journal of Systems Engineering and Electronics, 2010, 32(4): 729-733.

QIN Yu-liang, WANG Jian-tao, WANG Hong-qiang, LI Xiang. Range-Doppler algorithm-based missile-borne SAR imaging with lateral avoidance trajectory[J]. Journal of Systems Engineering and Electronics, 2010, 32(4): 729-733.