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2021-03-09

Direction Finding for Coherently Distributed Sources with Gain-Phase Errors

By Ye Tian, Zhiyan Dong, and Shuai Liu
Progress In Electromagnetics Research Letters, Vol. 96, 153-161, 2021
doi:10.2528/PIERL20121704

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.

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
http://jpier.org/PIERL/pier.php?paper=20121704

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