Estimating DOA and polarization with spatially spread loop and dipole pair array

The nonuniform L-shaped spatially spread loop and dipole（SSLD） array whose inter-element spacing is greater than half a wavelength is studied. A joint parameter estimation algorithm of direction of arrival（DOA）, frequency and polarization is presented for plane-wave signals. The direct sampling and...

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Bibliographic Details
Published in:Journal of systems engineering and electronics 2015-02, Vol.26 (1), p.44-49
Main Authors: Wang, Lanmei, Chen, Zhihai, Wang, Guibao, Rao, Xuan
Format: Article
Language:English
Subjects:
Algorithms
Arrays
DOA估计
Mathematical analysis
Phase (cyclic)
Phase transformations
Polarization
Spreads
Vectors (mathematics)
参数估计算法
扩散
数组
极化方向
环和
电偶极子
空间理论
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Summary:The nonuniform L-shaped spatially spread loop and dipole（SSLD） array whose inter-element spacing is greater than half a wavelength is studied. A joint parameter estimation algorithm of direction of arrival（DOA）, frequency and polarization is presented for plane-wave signals. The direct sampling and the corresponding delayed sampling data are used to construct the data correlation matrix. On the basis of the subspace theory and the least square method, the frequency and the steering vector of the whole array are obtained. According to the relationship of the array manifold vector between electric dipoles and magnetic loops,the polarization parameters are given. The unambiguous phase estimates are acquired by applying virtual baseline array transformation to the spatial steering vectors, and they are used as coarse references to disambiguate the cyclic phase ambiguities in phase differences between two adjacent array elements on the array,then the high accuracy DOA estimates are obtained. Closed-form solutions for each parameter are obtained. This method has advantages of lower calculation complexity and no parameter matching. The experiment results verify the effectiveness and feasibility of the presented algorithm.
ISSN:1004-4132
1004-4132
DOI:10.1109/JSEE.2015.00007