Efficient Calibration of Radio Interferometers Using Block LDU Decomposition Article Swipe
Ahmad Mouri Sardarabadi
,
A. van Veen
,
L. V. E. Koopmans
·
YOU?
·
· 2018
· Open Access
·
· DOI: https://doi.org/10.23919/eusipco.2018.8553058
YOU?
·
· 2018
· Open Access
·
· DOI: https://doi.org/10.23919/eusipco.2018.8553058
Having an accurate calibration method is crucial for any scientific research done by a radio telescope. The next generation radio telescopes such as the Square Kilometre Array (SKA) will have a large number of receivers which will produce exabytes of data per day. In this paper we propose new direction-dependent and independent calibration algorithms that, while requiring much less storage during calibration, converge very fast. The calibration problem can be formulated as a non-linear least square optimization problem. We show that combining a block-LDU decomposition with Gauss-Newton iterations produces systems of equations with convergent matrices. This allows significant reduction in complexity per iteration and very fast converging algorithms. We also discuss extensions to direction-dependent calibration. The proposed algorithms are evaluated using simulations.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- https://doi.org/10.23919/eusipco.2018.8553058
- OA Status
- green
- References
- 11
- Related Works
- 20
- OpenAlex ID
- https://openalex.org/W2791389356
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https://openalex.org/W2791389356Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.23919/eusipco.2018.8553058Digital Object Identifier
- Title
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Efficient Calibration of Radio Interferometers Using Block LDU DecompositionWork title
- Type
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preprintOpenAlex work type
- Language
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enPrimary language
- Publication year
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2018Year of publication
- Publication date
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2018-09-01Full publication date if available
- Authors
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Ahmad Mouri Sardarabadi, A. van Veen, L. V. E. KoopmansList of authors in order
- Landing page
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https://doi.org/10.23919/eusipco.2018.8553058Publisher landing page
- Open access
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YesWhether a free full text is available
- OA status
-
greenOpen access status per OpenAlex
- OA URL
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https://arxiv.org/pdf/1803.05707Direct OA link when available
- Concepts
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Calibration, Radio telescope, Block (permutation group theory), Computer science, Astronomical interferometer, Algorithm, Decomposition, Square (algebra), Mathematical optimization, Physics, Interferometry, Mathematics, Optics, Astrophysics, Statistics, Ecology, Biology, GeometryTop concepts (fields/topics) attached by OpenAlex
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0Total citation count in OpenAlex
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11Number of works referenced by this work
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20Other works algorithmically related by OpenAlex
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| citation_normalized_percentile.is_in_top_10_percent | False |