基于线性抽样方法的定量逆散射成像方法研究
Research on Quantitative Inverse Scattering Imaging Based on Linear Sampling Method
  
DOI:
中文关键词:  电磁逆散射, 微波成像, 线性抽样法, 对比度源法
英文关键词:electromagnetic inverse scattering, microwave imaging, linear sampling method (LSM), contrast source inversion(CSI)
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徐自强, 李安琪, 范启蒙, 尹成友 国防科技大学电子对抗学院脉冲功率激光国家重点实验室,合肥230037 
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中文摘要:
      提出了一种基于线性抽样法(Linear Sampling Method ,LSM)结合对比度源法(Contrast Source Inversion,CSI)的高效电磁逆散射成像方法。LSM 方法用于外形成像具有高效性,用于定量成像只能对较低介电常数成像,而CSI 方法对初值选择具有较大的依赖性。因此,采用LSM 的外形成像快速确定目标的大致区域,减小计算空间;然后将LSM 的定量成像作为CSI成像的初值,进行非线性迭代成像,大大提高了成像精度和成像效率。仿真结果验证了算法的有效性和高效性。
英文摘要:
      In this paper, based on the Linear Sampling Method (LSM)and combined with the Contrast Source Inversion(CSI),an effective electromagnetic scattering imaging method is presented. Due to the efficiency of LSM for shape imaging, and the limitation of quantitative imaging only for low dielectric constant imaging, while CSI has great dependence on initial value selection. Therefore, this approach exploits the shape imaging of LSM to quickly determine the approximate area of the target and reduces the computing imaging space. Then the solution via quantitative imaging of LSM is used as the initial value of the CSI to perform nonlinear iterative imaging, which greatly improves the imaging accuracy and computational efficiency. The simulation results show the validity and high efficiency of the proposed approach.
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