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Time reversal effects in random scattering media on superresolution, shower curtain effects, and backscattering enhancement
Author(s) -
Ishimaru Akira,
Jaruwatanadilok Sermsak,
Kuga Yasuo
Publication year - 2007
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2007rs003645
Subject(s) - coherent backscattering , optics , physics , gaussian , coherence (philosophical gambling strategy) , scattering , bandwidth (computing) , superresolution , coherence length , mutual coherence , computational physics , statistical physics , telecommunications , quantum mechanics , computer science , superconductivity , artificial intelligence , image (mathematics)
In this paper, we present analytical theories of the first and second moments of the time‐reversed pulse which are obtained by the second‐ and the fourth‐order moments of stochastic Green's functions in random media. The theories are based on the use of parabolic approximations, two‐frequency mutual coherence function, and the circular complex Gaussian assumptions. Several effects are discussed including the superresolution, the coherence length, backscattering enhancement, the dependence on the optical depth, the shower curtain effect, and the bandwidth.