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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2021-03-09
Direction Finding for Coherently Distributed Sources with Gain-Phase Errors
By
Ye Tian,

    Dr. Ye Tian

    Faculty of Information Science and Engineering

    Ningbo University

    China

    Homepage

Zhiyan Dong,

    Dr. Zhiyan Dong

    Academy for Engineering and Technology

    Fudan University

    China

    Homepage

Shuai Liu

    Dr. Shuai Liu

    School of Information Science and Engineering

    Yanshan University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 96, 153-161, 2021
doi:10.2528/PIERL20121704 | Google Scholar

Abstract
Affected by multipath propagation as well as the receiving conditions of an actual array, a distributed source model considering array uncertainties/errors is more consistent with the realistic scenarios. In this paper, a new direction finding method for coherently distributed (CD) sources in the presence of array gain-phase errors is proposed. By exploiting partly calibrated uniform linear arrays (ULA), the gain-phase errors are first estimated according to the relationship of elements of array covariance matrix, and then a two-step iterative procedure is introduced to achieve a joint estimation of nominal DOA and angular spread from sparse recovery perspective. Performance analysis and related Cramér-Rao bound (CRB) are also provided. Numerical examples show that the proposed method can provide improved resolution and estimation accuracy, and performs almost independently of gain-phase errors.
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Citation
Ye Tian, Zhiyan Dong, and Shuai Liu, "Direction Finding for Coherently Distributed Sources with Gain-Phase Errors," Progress In Electromagnetics Research Letters, Vol. 96, 153-161, 2021.
doi:10.2528/PIERL20121704
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