Time reversal methods in unknown medium and inverse problems

Details Time reversal methods in unknown medium and inverse problems Time reversal methods in unknown medium and inverse problems

2007-01-04

arxiv.org/abs/math/0701133v1

Mathematics

Analysis of PDEs

Scientific paper

A novel method to solve inverse problems for the wave equation is introduced. The method is a combination of the boundary control method and an iterative time reversal scheme, leading to adaptive imaging of coefficient functions of the wave equation using focusing waves in unknown medium. The approach is computationally effective since the iteration lets the medium do most of the processing of the data. The iterative time reversal scheme also gives an algorithm for constructing boundary controls for which the corresponding final values are as close as possible to the final values of a given wave in a part of the domain, and as close as possible to zero elsewhere. The algorithm does not assume that the coefficients of the wave equation are known.

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