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Direction of arrival estimation with off-grid target based on sparse reconstruction in impulsive noise
| Content Provider | SAGE Publishing |
|---|---|
| Author | Liang, LongKai Shi, YiRan Shi, YaoWu He, WenChao |
| Copyright Year | 2020 |
| Abstract | This paper proposes a direction of arrival estimation based on sparse signal reconstruction in the presence of alpha noise by the off-grid orthogonal matching pursuit algorithm. Assuming Gaussian distribution as the noise model, the previous sparse reconstruction enhances robustness by utilizing the least square criterion-based direction of arrival estimation algorithms. However, they severely degrade, even invalid, when there is thick trailing and large impulse in the noise molded by α stable distribution. In addition, due to the discretization of the potential angle space, the accuracy of these methods will be reduced when the target is not completely on the divided mesh exactly. Increasing the grid density to improve estimation effect will increase the computation burden. The compressed sensing signal model is reconstructed by reshaping the fractional lower order covariance matrix of the sensor array received signal. Based on the reshaped signal model, the novel reshaped orthogonal matching pursuit algorithm and reshaped off-grid orthogonal matching pursuit algorithm are derived. Compared to the least square criterion method with Gaussian distribution assumption, the proposed algorithm obtains high-resolution direction of arrival estimation in α noise. Moreover, the reshaped off-grid orthogonal matching pursuit algorithm improves the direction of arrival estimation accuracy with off-grid target. Numerical simulation results demonstrate the effectiveness of proposed method in direction of arrival estimation with off-grid targets in α noise. |
| Related Links | https://journals.sagepub.com/doi/pdf/10.1177/1461348420914458?download=true |
| Starting Page | 315 |
| Ending Page | 331 |
| Page Count | 17 |
| ISSN | 14613484 |
| Issue Number | 1 |
| Volume Number | 40 |
| Journal | Journal of Low Frequency Noise, Vibration and Active Control (LFN) |
| e-ISSN | 20484046 |
| DOI | 10.1177/1461348420914458 |
| Language | English |
| Publisher | Sage Publications UK |
| Publisher Date | 2020-04-07 |
| Publisher Place | London |
| Access Restriction | Open |
| Rights Holder | © The Author(s) 2020 |
| Subject Keyword | Direction of arrival sparse signal reconstruction off-grid target α stable distribution orthogonal matching pursuit |
| Content Type | Text |
| Resource Type | Article |
| Subject | Building and Construction Acoustics and Ultrasonics Mechanics of Materials Geophysics Mechanical Engineering Civil and Structural Engineering |
