A Frequency-Hopping Subspace-Based Optimization Method for Reconstruction of 2-D Large Uniaxial Anisotropic Scatterers With TE Illumination

A Frequency-Hopping Subspace-Based Optimization Method for Reconstruction of 2-D Large Uniaxial Anisotropic Scatterers With TE Illumination
复制标题

基于跳频子空间的TE照明二维大型单轴各向异性散射体重建优化方法

DOI:
10.1109/tgrs.2016.2580759
复制
发表时间:
2016-07
影响因子:
8.2
通讯作者:
Qing Huo Liu
Qing Huo Liu
中科院分区:
工程技术1区
文献类型:
--
作者:
Yulang Liu;Zhiqin Zhao;Yaohui Yang;Bingwen Wang;Xiaozhang Zhu;Zaiping Nie;Qing Huo Liu

文献摘要

参考文献

被引文献

相似文献

由于大型单轴各向异性散射体的非线性特性,许多迭代优化方法很容易陷入局部极小值。在本文中,提出了一种基于跳频子空间的优化方法(SOM)来重建具有横向电(TE)照明的二维大型单轴各向异性散射体的相对介电常数分布。这种混合方法利用在较低频率下获得的结果为较高频率重建提供良好的初始猜测,这减少了较高频率下反演的局部最小值的出现。对于较低频率,虽然无法显示散射体的细节,但只能获得粗分辨率的图像。然而,这个粗糙的图像为更高频率的重建提供了先验信息,以获得更精细的分辨率。数值例子表明,与仅使用单频数据的传统SOM相比,所提出的混合方法可以有效地重建大型单轴各向异性散射体(六个波长),并且具有更高的稳定性。
Due to the nonlinear property of large uniaxial anisotropic scatterers, many iterative optimization methods have a high risk of being trapped in local minima. In this paper, a frequency-hopping subspace-based optimization method (SOM) is proposed to reconstruct the relative permittivity distribution of 2-D large uniaxial anisotropic scatterers with transverse electrical (TE) illumination. This hybrid method utilizes the results obtained at lower frequency to provide good initial guesses for higher frequency reconstruction, which reduces the occurrence of local minima for the inversion at the higher frequency. For lower frequency, it can only obtain coarse resolution image although it is unable to show the details of the scatterers. However, this coarse image provides a priori information for the reconstruction at higher frequencies to get finer resolution. Numerical examples demonstrate that the proposed hybrid method can effectively rebuild large uniaxial anisotropic scatterers (six wavelengths) with higher stability compared with conventional SOM that uses only single-frequency data.
DOI: 10.1109/map.2011.5773566
发表时间: 2011-05
影响因子: 3.5
作者:
P. Rocca;G. Oliveri;A. Massa
通讯作者: P. Rocca;G. Oliveri;A. Massa
DOI: 10.1364/josaa.32.002218
发表时间: 2015
影响因子: 1.9
作者:
Xiuzhu Ye
通讯作者: Xiuzhu Ye
DOI: 10.1109/9780470547052
发表时间: 1990-06
期刊: --
影响因子: --
作者:
W. Chew
通讯作者: W. Chew
DOI: 10.1109/36.905242
发表时间: 2001-02-01
影响因子: 8.2
作者:
Cui, TJ;Chew, WC;Chen, SY
通讯作者: Chen, SY
DOI: 10.1109/tgrs.2008.2005529
发表时间: 2009-05-01
影响因子: 8.2
作者:
Donelli, Massimo;Franceschini, Davide;Massa, Andrea
通讯作者: Massa, Andrea