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Open AccessArticle

Grid Reconfiguration Method for Off-Grid DOA Estimation

1
Electronic Information School, Wuhan University, Wuhan 430072, China
2
Wuhan Maritime Communication Research Institute, Wuhan 430200, China
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(11), 1209; https://doi.org/10.3390/electronics8111209
Received: 20 September 2019 / Revised: 21 October 2019 / Accepted: 21 October 2019 / Published: 23 October 2019
(This article belongs to the Special Issue Recent Advances in Array Antenna and Array Signal Processing)
Off-grid algorithms for direction of arrival (DOA) estimation have become attractive because of their advantages in resolution and efficiency over conventional ones. In this paper, we propose a grid reconfiguration direction of arrival (GRDOA) estimation method based on sparse Bayesian learning. Unlike other off-grid methods, the grid points of GRDOA are treated as dynamic parameters. The number and position of the grid points are varied iteratively via a root method and a fission process. Then, the grid gets reconfigured through some criteria. By iteratively updating the reconfigured grid, DOAs are estimated completely. Since GRDOA has fewer grid points, it has better computational efficiency than the previous methods. Moreover, GRDOA can achieve better resolution and relatively higher accuracy. Numerical simulation results validate the effectiveness of GRDOA. View Full-Text
Keywords: grid reconfiguration; DOA estimation; sparse Bayesian learning; off-grid gap grid reconfiguration; DOA estimation; sparse Bayesian learning; off-grid gap
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MDPI and ACS Style

Ling, Y.; Gao, H.; Ru, G.; Chen, H.; Li, B.; Cao, T. Grid Reconfiguration Method for Off-Grid DOA Estimation. Electronics 2019, 8, 1209. https://doi.org/10.3390/electronics8111209

AMA Style

Ling Y, Gao H, Ru G, Chen H, Li B, Cao T. Grid Reconfiguration Method for Off-Grid DOA Estimation. Electronics. 2019; 8(11):1209. https://doi.org/10.3390/electronics8111209

Chicago/Turabian Style

Ling, Yun; Gao, Huotao; Ru, Guobao; Chen, Haitao; Li, Boya; Cao, Ting. 2019. "Grid Reconfiguration Method for Off-Grid DOA Estimation" Electronics 8, no. 11: 1209. https://doi.org/10.3390/electronics8111209

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