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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/26324
Title: Digital Signal Processing Using Stream High Performance Computing: A 512-Input Broadband Correlator for Radio Astronomy
Authors: Kocz, J.
Greenhill, L. J.
Barsdell, B. R.
Price, D.
BERNARDI, GIANNI 
Bourke, S.
Clark, M. A.
Craig, J.
Dexter, M.
Dowell, J.
Eftekhari, T.
Ellingson, S.
Hallinan, G.
Hartman, J.
Jameson, A.
MacMahon, D.
Taylor, G.
Schinzel, F.
Werthimer, D.
Issue Date: 2015
Journal: JOURNAL OF ASTRONOMICAL INSTRUMENTATION 
Number: 4
First Page: 1550003
Abstract: A "large-N" correlator that makes use of Field Programmable Gate Arrays and Graphics Processing Units has been deployed as the digital signal processing system for the Long Wavelength Array station at Owens Valley Radio Observatory (LWA-OV), to enable the Large Aperture Experiment to Detect the Dark Ages (LEDA). The system samples a ̃ 100 MHz baseband and processes signals from 512 antennas (256 dual polarization) over a ̃ 58 MHz instantaneous sub-band, achieving 16.8 Tops s<SUP>-1</SUP> and 0.236 Tbit s<SUP>-1</SUP> throughput in a 9 kW envelope and single rack footprint. The output data rate is 260 MB s<SUP>-1</SUP> for 9-s time averaging of cross-power and 1 s averaging of total power data. At deployment, the LWA-OV correlator was the largest in production in terms of N and is the third largest in terms of complex multiply accumulations, after the Very Large Array and Atacama Large Millimeter Array. The correlator's comparatively fast development time and low cost establish a practical foundation for the scalability of a modular, heterogeneous, computing architecture.
URI: http://hdl.handle.net/20.500.12386/26324
URL: https://www.worldscientific.com/doi/full/10.1142/S2251171715500038
ISSN: 2251-1725
DOI: 10.1142/S2251171715500038
Bibcode ADS: 2015JAI.....450003K
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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