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基于零点指向技术抑制星载SAR距离模糊算法
引用本文:齐维孔,禹卫东.基于零点指向技术抑制星载SAR距离模糊算法[J].数据采集与处理,2009,24(6).
作者姓名:齐维孔  禹卫东
作者单位:1. 中国科学院电子学研究所,北京,100190;中国科学院研究生院,北京,100039
2. 中国科学院电子学研究所,北京,100190
摘    要:给出了基于零点指向技术抑制星载合成孔径雷达距离模糊的算法.该算法主要利用阵列信号处理中零点指向技术的原理,将抑制距离模糊问题转化为在指定方向上功率极小化问题,又可等效为最小二乘零点功率约束优化问题.通过将约束矩阵特征值分解和选代相结合的方法对该优化模型进行求解,得到天线方向图最优加权系数,从而精确地控制零点的深度和宽度,达到对星载SAR距离模糊有效抑制的目的.仿真结果表明了该算法的有效性.

关 键 词:星载合成孔径雷达  距离模糊  阵列处理  零点指向技术

Suppression of Range Ambiguity Algorithm in Spaceborne Synthetic Aperture Radar System Based on Null Steering Techniques
Qi Weikong,Yu Weidong.Suppression of Range Ambiguity Algorithm in Spaceborne Synthetic Aperture Radar System Based on Null Steering Techniques[J].Journal of Data Acquisition & Processing,2009,24(6).
Authors:Qi Weikong  Yu Weidong
Abstract:An algorithm based on null steering techniques is proposed to suppress the range ambiguity of spaceborne synthetic aperture radar. The range ambiguity problem can be converted into minimizing power in given directions by using null steering techniques in array signal processing, which is equivalent to least-square null power constrained optimization problem. The optimal weighting coefficient of the antenna pattern is obtained by combining the eigenvalue decomposition of the constraint matrix with the iteration to control the depth and the width of nulls. Moreover, the range ambiguity is suppressed. The simulation result confirms the validity of the algorithm.
Keywords:spaceborne synthetic aperture radar (SAR)  range ambiguities  array processing  null steering techniques
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