Volume 19, Issue 5
Analyses and Applications of the Second-Order Cross Correlation in the Passive Imaging

Lingdi Wang ,  Wenbin Chen and Jin Cheng

10.4208/cicp.scpde14.26s

Commun. Comput. Phys., 19 (2016), pp. 1191-1220.

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  • Abstract

The first-order cross correlation and corresponding applications in the passive imaging are deeply studied by Garnier and Papanicolaou in their pioneer works. In this paper, the results of the first-order cross correlation are generalized to the second-order cross correlation. The second-order cross correlation is proven to be a statistically stable quantity, with respective to the random ambient noise sources. Specially, with proper time scales, the stochastic fluctuation for the second-order cross correlation converges much faster than the first-order one. Indeed, the convergent rate is of order O(T −1+α ), with 0<α<1. Besides, by using the stationary phase method in both homogeneous and scattering medium, similar behaviors of the singular components for the second-order cross correlation are obtained. Finally, two imaging methods are proposed to search for a target point reflector: One method is based on the imaging function, and has a better signal-to-noise rate; Another method is based on the geometric property, and can improve the bad range resolution of the imaging results.

  • History

Published online: 2018-04

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