一种大转角SAR图像散射中心各向异性提取方法

高悦欣; 李震宇; 盛佳恋; 邢孟道

doi:10.11999/JEIT151261

一种大转角SAR图像散射中心各向异性提取方法

doi: 10.11999/JEIT151261

基金项目:

高等学校博士学科点专项科研基金(优先发展领域) (20120203130001)

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- 被引次数: 34
出版历程
- 收稿日期: 2015-11-09
- 修回日期: 2016-04-19
- 刊出日期: 2016-08-19

Extraction Method for Anisotropy Characteristic of Scattering Center in Wide-angle SAR Imagery

Funds:

Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP)(20120203130001)

摘要

摘要: 基于各向异性特性反映了散射中心本身属性，该文提出一种大转角SAR条件下提取散射中心各向异性特性的算法。首先根据属性散射中心模型分析单个散射中心的回波构成；之后以单位矩阵作为标准正交基，将各向异性特性的估计转化为求解散射中心幅度变化的逆问题；再利用散射中心幅度变化的实数特性与连续性对该逆问题进行约束求解，实现了对散射中心各向异性特性的提取。Matlab仿真和电磁计算数据的处理结果验证了算法的准确性以及稳定性；与现有算法对比，所提算法运算效率高。
- 大转角SAR /
- 散射中心 /
- 各向异性
Abstract: Based on the fact that anisotropy characteristic represents some intrinsic properties of scattering centers, an algorithm for extracting anisotropy characteristic of scattering centers is proposed when wide-angle SAR is used. Firstly, the components of the echo from a single scattering center are analyzed based on attributed scattering center model. Secondly, the estimation of anisotropy characteristic is transformed into an inverse issue of solving variation of single scattering centers amplitude by using identity matrix as orthonormal basis. Finally, the inverse issue is solved under the constraints that the amplitude of scattering centers should be real and continuous. As a result, anisotropy characteristic is extracted from the solution of the inverse issue. Estimation results of both Matlab simulated and electromagnetic computation data validate that the proposed algorithm is not only precise but also robust. Moreover, the proposed method is more efficient compared with traditional methods.
- Wide-angle SAR /
- Scattering center /
- Anisotropy

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参考文献(28)

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