Loading...
Please wait, while we are loading the content...
Similar Documents
Time-domain inverse scattering using the local shape function (LSF) method
| Content Provider | Scilit |
|---|---|
| Author | Weedon, W. H. Chew, Weng Cho |
| Copyright Year | 1993 |
| Description | Journal: Inverse Problems 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. |
| Related Links | http://iopscience.iop.org/article/10.1088/0266-5611/9/5/005/pdf |
| Ending Page | 564 |
| Page Count | 14 |
| Starting Page | 551 |
| ISSN | 02665611 |
| e-ISSN | 13616420 |
| DOI | 10.1088/0266-5611/9/5/005 |
| Journal | Inverse Problems |
| Issue Number | 5 |
| Volume Number | 9 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1993-10-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Inverse Problems Finite Difference Time Domain Frechet Derivative Inverse Scattering Inverse Scattering Problem Boundary Condition Computer Simulation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Applied Mathematics Theoretical Computer Science Signal Processing Mathematical Physics Computer Science Applications |
