UCT CS Research Document Archive

GPU-based Acceleration of Radio Interferometry Point Source Visibility Calculations in the MEQtrees Framework

Baxter, Richard J., Patrick Marais and Michelle Kuttel (2013) GPU-based Acceleration of Radio Interferometry Point Source Visibility Calculations in the MEQtrees Framework. Astronomical Data Analysis Software and Systems XXII 475, Champaign, IL 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 Proceedings
Subjects:I Computing Methodologies: I.4 IMAGE PROCESSING AND COMPUTER VISION
J Computer Applications: J.2 PHYSICAL SCIENCES AND ENGINEERING
ID Code:897
Deposited By:Kuttel, Michelle
Deposited On:28 October 2013