摘要
机载SAR图像目标定位可通过数值分析的方法求解R-D模型方程组来实现。本文根据机载SAR的特点,对于迭代求解的关键点——初始点的选择进行了具体的探讨,给出了一种基于雷达照射方向的初始点选择方法,并推导出了计算初始点坐标的解析公式。最后明确给出了该目标定位算法的具体流程,并对该方法的迭代效率进行了仿真实验,考察了斜视角、雷达作用距离等因素对迭代效率的影响程度。仿真结果表明其具有较高计算效率,且保证了结果的唯一性。
Target location in airborne SAR image can be made by numerical analysis of Range-Doppler model equations. In this paper, the key steps of the iterative algorithm, the choice of the initial point has been discussed, and an optimization method by judging SAR irradiation direction is proposed. The formulas of the initial point coordinate and the specific process of location are also given. Fi- nally a simulation experiment is made,which present the influence extent to iteration efficiency from squint angle, radar range etc. The results show the efficiency of the method, which guarantee the result uniqueness.
出处
《信号处理》
CSCD
北大核心
2009年第4期669-673,共5页
Journal of Signal Processing
