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DOA and Polarization Estimation Based on Sparse COLD Array

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Abstract

Direction of arrival (DOA) ambiguity influences the performance of array signal processing. To address this problem, a DOA and polarization estimation method is proposed in this paper. Based on sparse uniform concentric semi-circular array consisting of concentred orthogonal loop and dipole pairs, the actual array steering vector can be transformed into a virtual one without additional computation. By applying dot division and dot product operation to outer and inner circular ring array spatial steering vectors, two new spatial steering vectors of arrays whose inter-element spacing are less and much larger than half wavelength are obtained respectively, the cyclic phase ambiguity is disambiguated effectively. In the proposed algorithm, all the array elements (actual and virtual) contribute toward the derivation of both the coarse estimations and the fine estimations, thereby achieving full exploitation of the entire physical aperture, the estimation precision is herein improved.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China under Contract (Nos. 61201295, 61231017, 61100156, 61402365). The authors would like to thank the anonymous reviewers and the associated editor for their valuable comments and suggestions that improved the clarity of this manuscript.

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Authors and Affiliations

  1. School of Physics and Optoelectronic Engineering, Xidian University, Xi’an, 710071, People’s Republic of China

    Lanmei Wang & Le Yang

  2. Collaborative Innovation Center of Information Sensing and Understanding at Xidian University, Xi’an, People’s Republic of China

    Lanmei Wang & Le Yang

  3. School of Computer Science and Technology, Xidian University, Xi’an, 710071, People’s Republic of China

    Shuzhen Wang

  4. School of Physics and Telecommunication Engineering, Shaanxi University of Technology, Hanzhong, 723001, People’s Republic of China

    Guibao Wang

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  1. Lanmei Wang
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  2. Le Yang
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Correspondence to Lanmei Wang.

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Wang, L., Yang, L., Wang, G. et al. DOA and Polarization Estimation Based on Sparse COLD Array. Wireless Pers Commun 85, 2447–2462 (2015). https://doi.org/10.1007/s11277-015-2914-0

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  • DOI: https://doi.org/10.1007/s11277-015-2914-0

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