Unitary matrix completion-based DOA estimation of noncircular signals in nonuniform noise

In this paper, a novel direction-of-arrival (DOA) estimation algorithm is proposed for noncircular signals with nonuniform noise by using the unitary matrix completion (UMC) technique. First, the proposed method utilizes the noncircular property of signals to design a virtual array for approximately...

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Main Authors: Wang, Xianpeng, Zhu, Yanghui, Huang, Mengxing, Wang, Jingjing, Wan, Liangtian, Bi, Guoan
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/107491
http://hdl.handle.net/10220/49711
http://dx.doi.org/10.1109/ACCESS.2019.2920707
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1074912019-12-06T22:32:20Z Unitary matrix completion-based DOA estimation of noncircular signals in nonuniform noise Wang, Xianpeng Zhu, Yanghui Huang, Mengxing Wang, Jingjing Wan, Liangtian Bi, Guoan School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Direction-of-arrival Estimation Noncircular In this paper, a novel direction-of-arrival (DOA) estimation algorithm is proposed for noncircular signals with nonuniform noise by using the unitary matrix completion (UMC) technique. First, the proposed method utilizes the noncircular property of signals to design a virtual array for approximately doubling the array aperture. Then, the virtual complex-valued covariance matrix with the unknown nonuniform noise is transformed into the real-valued one by utilizing the unitary transformation to improve the computational efficiency. Next, a novel UMC method is formulated for the DOA estimation to remove the influence of nonuniform noise. Finally, the DOA without the influence of the unknown noncircularity phase is obtained by using the modified estimation of signal parameters via rotational invariance technique (ESPRIT). Especially, for handling the coherent sources, the forward-backward spatial smoothing technique is utilized to reconstruct a full-rank covariance matrix so that the signal subspace and the noise subspace can be correctly separated. Due to utilizing the extended array aperture and the unitary transformation, the proposed method can identify more sources than the number of physical sensors and provides higher angular resolution and better estimation performance. Compared with the existing DOA estimation algorithms for noncircular signals, the proposed one can effectively suppress the influence of the nonuniform noise. The simulation results are provided to verify the effectiveness and superiority of the proposed method. Published version 2019-08-20T09:19:26Z 2019-12-06T22:32:20Z 2019-08-20T09:19:26Z 2019-12-06T22:32:20Z 2019 Journal Article Wang, X., Zhu, Y., Huang, M., Wang, J., Wan, L., & Bi, G. (2019). Unitary matrix completion-based DOA estimation of noncircular signals in nonuniform noise. IEEE Access, 7, 73719-73728. doi:10.1109/ACCESS.2019.2920707 https://hdl.handle.net/10356/107491 http://hdl.handle.net/10220/49711 http://dx.doi.org/10.1109/ACCESS.2019.2920707 en IEEE Access © 2019 IEEE. Articles accepted before 12 June 2019 were published under a CC BY 3.0 or the IEEE Open Access Publishing Agreement license. Questions about copyright policies or reuse rights may be directed to the IEEE Intellectual Property Rights Office at +1-732-562-3966 or copyrights@ieee.org. 10 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Direction-of-arrival Estimation
Noncircular
spellingShingle Engineering::Electrical and electronic engineering
Direction-of-arrival Estimation
Noncircular
Wang, Xianpeng
Zhu, Yanghui
Huang, Mengxing
Wang, Jingjing
Wan, Liangtian
Bi, Guoan
Unitary matrix completion-based DOA estimation of noncircular signals in nonuniform noise
description In this paper, a novel direction-of-arrival (DOA) estimation algorithm is proposed for noncircular signals with nonuniform noise by using the unitary matrix completion (UMC) technique. First, the proposed method utilizes the noncircular property of signals to design a virtual array for approximately doubling the array aperture. Then, the virtual complex-valued covariance matrix with the unknown nonuniform noise is transformed into the real-valued one by utilizing the unitary transformation to improve the computational efficiency. Next, a novel UMC method is formulated for the DOA estimation to remove the influence of nonuniform noise. Finally, the DOA without the influence of the unknown noncircularity phase is obtained by using the modified estimation of signal parameters via rotational invariance technique (ESPRIT). Especially, for handling the coherent sources, the forward-backward spatial smoothing technique is utilized to reconstruct a full-rank covariance matrix so that the signal subspace and the noise subspace can be correctly separated. Due to utilizing the extended array aperture and the unitary transformation, the proposed method can identify more sources than the number of physical sensors and provides higher angular resolution and better estimation performance. Compared with the existing DOA estimation algorithms for noncircular signals, the proposed one can effectively suppress the influence of the nonuniform noise. The simulation results are provided to verify the effectiveness and superiority of the proposed method.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Wang, Xianpeng
Zhu, Yanghui
Huang, Mengxing
Wang, Jingjing
Wan, Liangtian
Bi, Guoan
format Article
author Wang, Xianpeng
Zhu, Yanghui
Huang, Mengxing
Wang, Jingjing
Wan, Liangtian
Bi, Guoan
author_sort Wang, Xianpeng
title Unitary matrix completion-based DOA estimation of noncircular signals in nonuniform noise
title_short Unitary matrix completion-based DOA estimation of noncircular signals in nonuniform noise
title_full Unitary matrix completion-based DOA estimation of noncircular signals in nonuniform noise
title_fullStr Unitary matrix completion-based DOA estimation of noncircular signals in nonuniform noise
title_full_unstemmed Unitary matrix completion-based DOA estimation of noncircular signals in nonuniform noise
title_sort unitary matrix completion-based doa estimation of noncircular signals in nonuniform noise
publishDate 2019
url https://hdl.handle.net/10356/107491
http://hdl.handle.net/10220/49711
http://dx.doi.org/10.1109/ACCESS.2019.2920707
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