| 一种综合孔径辐射计贝叶斯反演法 |
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| 引用本文： | 何方敏,李青侠,冷毅,朱耀庭.一种综合孔径辐射计贝叶斯反演法[J].华中科技大学学报(自然科学版),2010(8). |
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| 作者姓名： | 何方敏 李青侠 冷毅 朱耀庭 |
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| 作者单位： | 华中科技大学电子与信息工程系;空军雷达学院信息对抗系; |
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| 基金项目： | 国家自然科学基金资助项目(60705018) |
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| 摘 要： | 将贝叶斯反演理论应用于综合孔径辐射计图像反演,其基本思想是将亮温分布和可见度视为随机变量,将图像反演转换为贝叶斯推断问题.基于这一思想,分析了亮温分布的先验信息和可见度的统计特性.鉴于热辐射信号具有高斯特性,建立了亮温分布的高斯先验模型,并采用期望最大算法估计该先验模型的未知参数.可见度采用多元高斯随机变量表示,并考虑了可见度的互相关性.贝叶斯反演法能够充分利用可见度和先验信息的统计特性.仿真和实验结果表明:贝叶斯反演法能有效提高综合孔径辐射计的成像性能.
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| 关 键 词： | 综合孔径 辐射计 反问题 贝叶斯反演法 先验信息 统计特性 |
A Bayesian inversion method for aperture synthesis radiometers |
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| He Fangmin Li Qingxia Leng Yi Zhu Yaoting.A Bayesian inversion method for aperture synthesis radiometers[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2010(8). |
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| Authors: | He Fangmin Li Qingxia Leng Yi Zhu Yaoting |
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| Institution: | He Fangmin1 Li Qingxia1 Leng Yi2 Zhu Yaoting1(1 Department of Electronics and Information Engineering,Huazhong University of Science and Technology,Wuhan 430074,China,2 Department of Information Counter,Air Force Radar Academy,Wuhan 430019,China) |
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| Abstract: | Bayesian inversion methods,whose principle is to treat the unknown brightness temperature distribution and the visibilities as random variables and to recast the image reconstruction of ASRs as Bayesian inference,was used in the image reconstruction of aperture synthesis radiometers (ASRs).The statistical properties of the visibilities and the prior information of brightness temperature are investigated.Thermal radiation having Gaussian property,a Gaussian prior model was constructed by an unknown parameter... |
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| Keywords: | aperture synthesis radiometers inverse problem Bayesian inversion method prior information statistical property |
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