 |
Conference papers
Analysis of Kirchhoff migration and direct sampling method within far-field approximation: from the multi-static to the mono-static configuration
Abstract : A recently developed direct sampling method (DSM) is studied in the framework of multi-and mono-static configurations within the far-field hypothesis. A full analysis of the behavior of the DSM has not been provided yet in both cases even if, due to a lack of information compared to multi-static data, the mono-static configurations need an adapted analysis. Thanks to the theoretical analysis based on the asymptotic formula for far-field patterns and small obstacles hypothesis, the behavior of DSM is explained and the reason for which it failed in the mono-static configuration is identified. A modified DSM is then proposed and compared to the classical Kirchhoff migration technique (KM) in order to improve the imaging efficiency of the DSM approach. The theoretical results are supported by numerical experiments with synthetic data.
Keywords :
mono-static configuration
multistatic data
direct sampling method
Kirchhoff migration analysis
far-field approximation
multistatic configuration
far-field hypothesis
small obstacle hypothesis
far-field patterns
asymptotic formula
modified DSM
classical Kirchhoff migration technique
imaging efficiency
https://hal-centralesupelec.archives-ouvertes.fr/hal-01830567
Contributor : Marc Lambert Connect in order to contact the contributor
Submitted on : Thursday, July 5, 2018 - 10:59:25 AM
Last modification on : Wednesday, September 8, 2021 - 6:07:15 PM
Contributor : Marc Lambert Connect in order to contact the contributor
Submitted on : Thursday, July 5, 2018 - 10:59:25 AM
Last modification on : Wednesday, September 8, 2021 - 6:07:15 PM