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Wideband Sparse Rec...
Wideband Sparse Reconstruction for Scanning Radar
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- Zhang, Yongchao (author)
- University of Electronic Science and Technology of China
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- Jakobsson, Andreas (author)
- Lund University,Lunds universitet,Statistical Signal Processing Group,Forskargrupper vid Lunds universitet,Lund University Research Groups
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- Zhang, Yin (author)
- University of Electronic Science and Technology of China
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- Huang, Yulin (author)
- University of Electronic Science and Technology of China
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- Yang, Jianyu (author)
- University of Electronic Science and Technology of China
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(creator_code:org_t)
- 2018
- 2018
- English.
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In: IEEE Transactions on Geoscience and Remote Sensing. - 0196-2892. ; 56:10, s. 6055-6068
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Recently, the generalized sparse iterative covariance-based estimation algorithm was extended to allow for varying norm constraints in scanning radar applications. In this paper, further to this development, we introduce a wideband dictionary framework which can provide a computationally efficient estimation of sparse signals. The technique is formed by initially introducing a coarse grid dictionary constructed from integrating elements, spanning bands of the considered parameter space. After forming estimates of the initially activated bands, these are retained and refined, whereas nonactivated bands are discarded from the further optimization, resulting in a smaller and zoomed dictionary with a finer grid. Implementing this scheme allows for reliable sparse signal reconstruction, at a much lower computational cost as compared to directly forming a larger dictionary spanning the whole parameter space. Simulation and real data processing results demonstrate that the proposed wideband estimator offers significant computational savings, without noticeable loss of performance.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Keyword
- Antenna measurements
- Antennas
- Covariance-based sparse estimation
- Dictionaries
- Estimation
- generalized sparse reconstruction
- Image reconstruction
- Radar
- scanning radar
- Sensors
- wideband dictionary.
Publication and Content Type
- art (subject category)
- ref (subject category)
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