| Автор | W H Weedon |
| Автор | Weng Cho Chew |
| Дата выпуска | 1993-10-01 |
| dc.description | A non-linear inverse scattering algorithm is presented that uses a local shape function (LSF) approximation to parametrize very strong scatterers in the presence of a transient excitation source. The LSF approximation was presented recently in the context of continuous-wave (CW) excitation and was shown to give good reconstructions of strong scatterers such as metallic objects. It is shown that the local (binary) shape function may be implemented as a volumetric boundary condition in a finite-difference time domain (FDTD) forward scattering solver. The inverse scattering problem is then cast as a non-linear optimization problem where the N-dimensional Frechet derivative of the scattered field is computed as a single backpropagation and correlation using the FDTD forward solver. Connection between the new algorithm and a similar method employing the distorted Born approximation is shown. Computer simulations show that the LSF method employing a FDTD forward solver has superior convergence properties over the corresponding distorted-Born algorithm. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Time-domain inverse scattering using the local shape function (LSF) method |
| Тип | paper |
| DOI | 10.1088/0266-5611/9/5/005 |
| Electronic ISSN | 1361-6420 |
| Print ISSN | 0266-5611 |
| Журнал | Inverse Problems |
| Том | 9 |
| Первая страница | 551 |
| Последняя страница | 564 |
| Аффилиация | W H Weedon; Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA |
| Аффилиация | Weng Cho Chew; Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA |
| Выпуск | 5 |
