Traditional synthetic aperture direction-of-arrival (DOA) estimation methods are sensitive to the spatial and temporal incoherence introduced by the towed array shape deformation and phase unstability. This motivates us to propose a Bayesian acoustic DOA estimator, which is less sensitive to fluctuations in source phase and perturbations in array manifold in this article. The proposed technique extends the physical aperture in beamspace by leveraging the Fourier coefficients of the collected data computed at a given frequency for a successive time interval. A parameterized stochastic model for nonideal signal conditions is developed, and an interpretation of how the signal decorrelation is accomplished within a Bayesian framework is presented. Based on the probabilistic model, an iterative algorithm is developed by maximizing the marginal likelihood. Since this learning procedure is computationally intractable, we derive a variational expectation–maximization algorithm, which approximates the posterior probability distributions for the computation of the expectations over the latent variables. In addition, a 1-D search in the reconstruction result is designed to refine the coarse DOA estimates. Multisource simulations are used to illustrate the robustness of our learning algorithm to various data perturbations.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Robust Bayesian Acoustic DOA Estimation With Passive Synthetic Aperture Arrays


    Beteiligte:
    Yang, Jie (Autor:in) / Yang, Yixin (Autor:in) / Liao, Bin (Autor:in)


    Erscheinungsdatum :

    01.04.2025


    Format / Umfang :

    1735298 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    The Passive Synthetic Aperture Technique of Acoustic Vector Sensor Line Array

    Xinyi, H. / Xingzhou, J. / Qihu, L. | British Library Online Contents | 2003


    INVERSE PASSIVE SYNTHETIC APERTURE RADAR

    A. V. Ksendzuk / P. A. Gerasimov | DOAJ | 2016

    Freier Zugriff

    Airborne synthetic aperture acoustic imaging

    Soumekh, M. | Tema Archiv | 1997


    DETECTING, CLASSIFYING MINES WITH SYNTHETIC APERTURE ACOUSTIC TOMOGRAPHY

    Sternlicht, D. / Fernandez, J.E. / Marston, T.M. | British Library Online Contents | 2012


    Emitter Localization Algorithm Based on Passive Synthetic Aperture

    Zhang, Liting / Huan, Hao / Tao, Ran et al. | IEEE | 2022