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Article dans une revue

Estimation of coherent scattering in dynamic random media

Clément J. Roussel 1 Arnaud Coatanhay 2 Alexandre Baussard 1
1 Lab-STICC_ENSTAB_CID_TOMS
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
2 Lab-STICC_ENSTAB_MOM_PIM
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
Abstract : We address the question of estimating coherent scattering (weak scattering or coherent scatterer) by a time-evolving random medium. We consider two models of coherent scattering: homodyned K (HK) and generalized K (GK), and in both cases we derive stochastic differential equations for the scattered field. Approximate transition probabilities are computed using Euler–Maruyama scheme and the parameters for coherent scattering are estimated by maximum likelihood (ML). Using numerical simulations, we show that in the HK case, maximum likelihood estimation does not provide a significant advantage over a simplistic estimator based on the ergodicity property of the scattered field. On contrary, in GK scattering the transition probabilities carry significant information about the parameters, resulting in much better performance of the ML estimator.
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https://hal.archives-ouvertes.fr/hal-02520048
Contributeur : Marie Briec <>
Soumis le : jeudi 26 mars 2020 - 13:49:50
Dernière modification le : mercredi 24 juin 2020 - 16:19:56

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Clément J. Roussel, Arnaud Coatanhay, Alexandre Baussard. Estimation of coherent scattering in dynamic random media. Waves in Random and Complex Media, In press, ⟨10.1080/17455030.2020.1740824⟩. ⟨hal-02520048⟩

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