Intrinsic advantages of the w component and spherical imaging for wide-field radio interferometry

Jason D McEwen; Yves Wiaux

doi:10.1109/URSIGASS.2011.6051226

Intrinsic advantages of the w component and spherical imaging for wide-field radio interferometry

Jason D McEwen, Yves Wiaux

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

Incorporating wide-field considerations in interferometric imaging is of increasing importance for next-generation radio telescopes. Compressed sensing techniques for interferometric imaging have been extended to wide fields recently, recovering images in the spherical coordinate space in which they naturally live. We review these techniques, highlighting: (i) how the effectiveness of the spread spectrum phenomenon, due to the w component inducing an increase of measurement incoherence, is enhanced when going to wide fields; and (ii) how sparsity is reduced by recovering images directly on the sphere. Both of these properties act to improve the quality of reconstructed images.

Original language	English
Title of host publication	30th URSI General Assembly and Scientific Symposium, 2011
Publisher	IEEE
Number of pages	4
ISBN (Print)	978-1-4244-5117-3
DOIs	https://doi.org/10.1109/URSIGASS.2011.6051226
Publication status	Published - 2011
Event	30th URSI General Assembly and Scientific Symposium, 2011 - Istanbul, Turkey Duration: 13 Aug 2011 → 20 Aug 2011

Conference

Conference	30th URSI General Assembly and Scientific Symposium, 2011
Abbreviated title	URSIGASS 2011
Country/Territory	Turkey
City	Istanbul
Period	13/08/11 → 20/08/11

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10.1109/URSIGASS.2011.6051226

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title = "Intrinsic advantages of the w component and spherical imaging for wide-field radio interferometry",

abstract = "Incorporating wide-field considerations in interferometric imaging is of increasing importance for next-generation radio telescopes. Compressed sensing techniques for interferometric imaging have been extended to wide fields recently, recovering images in the spherical coordinate space in which they naturally live. We review these techniques, highlighting: (i) how the effectiveness of the spread spectrum phenomenon, due to the w component inducing an increase of measurement incoherence, is enhanced when going to wide fields; and (ii) how sparsity is reduced by recovering images directly on the sphere. Both of these properties act to improve the quality of reconstructed images.",

author = "McEwen, {Jason D} and Yves Wiaux",

year = "2011",

doi = "10.1109/URSIGASS.2011.6051226",

language = "English",

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booktitle = "30th URSI General Assembly and Scientific Symposium, 2011",

publisher = "IEEE",

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note = "30th URSI General Assembly and Scientific Symposium, 2011, URSIGASS 2011 ; Conference date: 13-08-2011 Through 20-08-2011",

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AU - McEwen, Jason D

AU - Wiaux, Yves

PY - 2011

Y1 - 2011

N2 - Incorporating wide-field considerations in interferometric imaging is of increasing importance for next-generation radio telescopes. Compressed sensing techniques for interferometric imaging have been extended to wide fields recently, recovering images in the spherical coordinate space in which they naturally live. We review these techniques, highlighting: (i) how the effectiveness of the spread spectrum phenomenon, due to the w component inducing an increase of measurement incoherence, is enhanced when going to wide fields; and (ii) how sparsity is reduced by recovering images directly on the sphere. Both of these properties act to improve the quality of reconstructed images.

AB - Incorporating wide-field considerations in interferometric imaging is of increasing importance for next-generation radio telescopes. Compressed sensing techniques for interferometric imaging have been extended to wide fields recently, recovering images in the spherical coordinate space in which they naturally live. We review these techniques, highlighting: (i) how the effectiveness of the spread spectrum phenomenon, due to the w component inducing an increase of measurement incoherence, is enhanced when going to wide fields; and (ii) how sparsity is reduced by recovering images directly on the sphere. Both of these properties act to improve the quality of reconstructed images.

UR - http://www.scopus.com/inward/record.url?scp=81255193752&partnerID=8YFLogxK

U2 - 10.1109/URSIGASS.2011.6051226

DO - 10.1109/URSIGASS.2011.6051226

M3 - Conference contribution

AN - SCOPUS:81255193752

SN - 978-1-4244-5117-3

BT - 30th URSI General Assembly and Scientific Symposium, 2011

PB - IEEE

T2 - 30th URSI General Assembly and Scientific Symposium, 2011

Y2 - 13 August 2011 through 20 August 2011

ER -

Intrinsic advantages of the w component and spherical imaging for wide-field radio interferometry

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