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DOA Estimation of Coherent Signals Based on the Sparse Representation for Acoustic Vector-Sensor Arrays

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Abstract

This paper focuses on the problem of the DOA estimation of coherent signals for the acoustic vector-sensor arrays (AVSAs) in the presence of the isotropic ambient noise. We propose a high-resolution DOA estimation method based on the acoustic intensity principle and the sparse representation technique. First, two cross-covariance matrices are constructed by employing the acoustic pressure and particle velocity components of the AVSA, which eliminates the isotropic noise. Then, in order to fully explore the DOA information of the particle velocity components, an augmented matrix is formed based on the two cross-covariance matrices. We observe an interesting fact that the left singular vector corresponding to the maximum singular value of the augmented cross-covariance matrix is the linear combination of all the signal steering vectors. Based on this fact, a high-resolution DOA estimation algorithm is developed via sparsely representing the left singular vector. This method does not require the prior knowledge of the noise variance or the number of signals to construct the sparse representation model. Simulation and experimental results demonstrate the proposed method outperforms the MUSIC method based on the forward/backward spatial smoothing and some existing sparse representation methods in estimation accuracy and angular resolution, especially in the cases of a low signal-to-noise ratio and/or coherent signals with small angular separations.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 11674074 and 11674075, 61701133).

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Authors and Affiliations

  1. Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin, 150001, China

    Shengguo Shi, Desen Yang, Aifei Liu & Zhongrui Zhu

  2. Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin, 150001, China

    Shengguo Shi, Desen Yang, Aifei Liu & Zhongrui Zhu

  3. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin, 150001, China

    Shengguo Shi, Ying Li, Desen Yang, Aifei Liu & Zhongrui Zhu

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  1. Shengguo Shi
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  2. Ying Li
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Correspondence to Ying Li.

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Shi, S., Li, Y., Yang, D. et al. DOA Estimation of Coherent Signals Based on the Sparse Representation for Acoustic Vector-Sensor Arrays. Circuits Syst Signal Process 39, 3553–3573 (2020). https://doi.org/10.1007/s00034-019-01323-7

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  • DOI: https://doi.org/10.1007/s00034-019-01323-7

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