Resolution enhancement from scattering in passive sensor imaging with cross correlations
In this paper, the framework for the analysis of cross correlations of noise signals is presented. Imaging by cross correlation of noise signals is reviewed briefly for a homogeneous background. The main result of the paper addresses cross correlation based passive array imaging in a weakly scattering medium. Also, a case is considered in which scattering is not generated by random inhomogeneities but by a deterministic reflecting interface in medium. The authors show how the use of iterated (fourth-order) cross correlations and appropriate imaging functionals can improve the resolution and the signal-to-noise ratio of passive sensor imaging in a scattering medium. Numerical simulations to illustrate the results of the paper are carried out.
scientific article; zbMATH DE number 6377641
scientific article