Improved subspace migration for imaging of small and arc-like perfectly conducting cracks

Won-Kwang Park

Journal of Electromagnetic Waves and Applications, 2014, vol. 28, issue 4, 410-419

Abstract: This paper considers the fast, effective imaging of a perfectly conducting crack(s) in a 2-D homogeneous medium using data measured on its boundary. Based on the structure of singular vectors of the Multi-Static Response (MSR) matrix, whose elements are normalized by a suitable test function at several frequencies, we introduce a weighted subspace migration imaging functional. Based on the relation with the Bessel functions of integer order, it is verified that this is an improved version of traditional subspace migration. Numerical experiments for small and extended cracks from noisy synthetic data support our analysis.

Date: 2014
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DOI: 10.1080/09205071.2013.866526

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