Coherent interferometric imaging in clutter
نویسندگان
چکیده
منابع مشابه
Coherent Interferometric Imaging in Clutter
Coherent interferometry is an array imaging method in which we back propagate, or migrate, crosscorrelations of the traces over appropriately chosen space-time windows, rather than the traces themselves. The size of the space-time windows is critical and depends on two parameters. One is the decoherence frequency, which is proportional to the reciprocal of the delay spread in the traces produce...
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We introduce a space-time interferometric array imaging functional that provides statistically stable images in cluttered environments. We also present a resolution theory for this imaging functional that relates the space-time coherence of the data to the range and cross-range resolution of the image. Extensive numerical simulations illustrate the theory and address some implementation issues....
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We analyze the resolution and statistical fluctuations of images when the ambient medium is random and scattering can be modeled primarily by wavefront distortion. We compare the coherent interferometric imaging method to the widely used Kirchhoff migration and show how the latter loses statistical stability at an exponential rate with the distance of propagation. In Kirchhoff migration we form...
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A frequently used broadband array imaging method is Kirchhoff or travel time migration. In smooth and known media Kirchhoff migration works quite well, with range resolution proportional to the reciprocal of the bandwidth and cross range resolution that is proportional to the reciprocal of the array size. In a randomly inhomogeneous medium, Kirchhoff migration is unreliable because the images d...
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ژورنال
عنوان ژورنال: GEOPHYSICS
سال: 2006
ISSN: 0016-8033,1942-2156
DOI: 10.1190/1.2209541