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PAC

Information Center for Mathematical Science

PAC

CORRELATION BASED VIRTUAL SOURCE IMAGING IN STRONGLY SCATTERING RANDOM MEDIA
Author GEORGE PAPANICOLAOU (Stanford University)
Homepage Url http://math.stanford.edu/~papanico/pubs.html#corr
Coauthors JOSSELIN GARNIER
Abstract Array imaging in a strongly scattering medium is limited because coherent signals recorded at the array and coming from a reflector to be imaged are weak and dominated by incoherent signals coming from multiple scattering by the medium. If, however, an auxiliary passive array can be placed between the reflector to be imaged and the scattering medium then the cross correlations of the incoherent signals on this array can also be used to image the reflector. In this paper we show both in the weakly scattering paraxial regime and in strongly scattering layered media that this cross correlation approach produces images as if the medium between the sources and the passive array was homogeneous and the auxiliary passive array was an active one made of both sources and receivers.
Abstract Url http://math.stanford.edu/~papanico/pubftp/virtual.pdf