一種大轉(zhuǎn)角SAR圖像散射中心各向異性提取方法

高悅欣; 李震宇; 盛佳戀; 邢孟道

doi:10.11999/JEIT151261

一種大轉(zhuǎn)角SAR圖像散射中心各向異性提取方法

doi: 10.11999/JEIT151261

基金項目:

高等學(xué)校博士學(xué)科點(diǎn)專項科研基金(優(yōu)先發(fā)展領(lǐng)域) (20120203130001)

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- 被引次數(shù): 0
出版歷程
- 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: 基于各向異性特性反映了散射中心本身屬性，該文提出一種大轉(zhuǎn)角SAR條件下提取散射中心各向異性特性的算法。首先根據(jù)屬性散射中心模型分析單個散射中心的回波構(gòu)成；之后以單位矩陣作為標(biāo)準(zhǔn)正交基，將各向異性特性的估計轉(zhuǎn)化為求解散射中心幅度變化的逆問題；再利用散射中心幅度變化的實數(shù)特性與連續(xù)性對該逆問題進(jìn)行約束求解，實現(xiàn)了對散射中心各向異性特性的提取。Matlab仿真和電磁計算數(shù)據(jù)的處理結(jié)果驗證了算法的準(zhǔn)確性以及穩(wěn)定性；與現(xiàn)有算法對比，所提算法運(yùn)算效率高。
- 大轉(zhuǎn)角SAR /
- 散射中心 /
- 各向異性
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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參考文獻(xiàn)(28)

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