UCT CS Research Document Archive

GPU-based acceleration of Radio Interferometry point source visibility calculations in the MEQtrees framework

Baxter, Richard , Patrick Marais and Michelle Kuttel (2013) GPU-based acceleration of Radio Interferometry point source visibility calculations in the MEQtrees framework. In Proceedings Astronomical Data Analysis Software and Systems - ADASS XXII 475, pages 53-59, Chicago, USA.

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Abstract

Modern radio interferometer arrays are powerful tools for obtaining high resolution,
low frequency images of objects in deep space. An inverse Fourier transform of a
model sky-intensity map will produce the corresponding Point Source Visibilities: the
raw output of an interferometer. Simulated visibilities can be used to test models of
factors affecting the accuracy of observed data, such as radio frequency interference.
We describe a GPU/CUDA implementation of the Point Source Visibility calculation
module within theMeqTrees software suite. For a large numbers of sources, we achieve
an 18× speed-up over the existing CPU module, with the parallel component running
up to 120× faster. With modifications to the MeqTrees memory management system to
incorporate GPU memory operations, a speed-up of 24× is achievable.

EPrint Type:Conference Paper
Subjects:I Computing Methodologies: I.4 IMAGE PROCESSING AND COMPUTER VISION
I Computing Methodologies: I.6 SIMULATION AND MODELING
ID Code:906
Deposited By:Marais, Patrick
Deposited On:28 October 2013