Digital Signal Processing Using Stream High Performance Computing-Reference-Cited by-同舟云学术

Digital Signal Processing Using Stream High Performance Computing

Published:2015-06 Issue:01n02 Volume:04 Page:1550003
ISSN:2251-1717
Container-title:Journal of Astronomical Instrumentation
language:en
Short-container-title:J. Astron. Instrum.

Author:

Kocz J.¹²,Greenhill L. J.¹,Barsdell B. R.¹,Price D.¹,Bernardi G.³⁴,Bourke S.⁵,Clark M. A.¹⁵⁶,Craig J.⁷,Dexter M.⁸,Dowell J.⁷,Eftekhari T.⁷,Ellingson S.⁹,Hallinan G.⁵,Hartman J.²,Jameson A.¹⁰,MacMahon D.⁸,Taylor G.⁷,Schinzel F.⁷,Werthimer D.¹¹

Affiliation:

1. Harvard-Smithsonian Center for Astrophysics 60 Garden Street, Cambridge, Massachusetts 02138, USA

2. Jet Propulsion Laboratory California Institute of Technology, Pasadena, CA 91109 USA

3. SKA SA, 3rd Floor, The Park, Park Road, Pinelands 7405, South Africa

4. Department of Physics and Electronics, Rhodes University P. O. Box 94, Grahamstown 6140, South Africa

5. California Institute of Technology 1200 E. California Blvd., Pasadena 91125, USA

6. NVIDIA Corporation 2701 San Tomas Expressway, Santa Clara, CA 95050, USA

7. Department of Physics and Astronomy University of New Mexico, Albuquerque, NM 87131, USA

8. Radio Astronomy Laboratory University of California, Berkeley, CA 94720, USA

9. Bradley Department of Electrical and Computer Engineering Virginia Tech, Blacksburg, VA 24061, USA

10. Centre for Astrophysics and Supercomputing Swinburne University of Technology 1 Alfred Street, Hawthorn, Victoria 3122, Australia

11. Space Sciences Lab, University of California, Berkeley, CA 94720, USA

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 [Formula: see text][Formula: see text]MHz baseband and processes signals from 512 antennas (256 dual polarization) over a [Formula: see text][Formula: see text]MHz instantaneous sub-band, achieving 16.8[Formula: see text]Tops[Formula: see text]s[Formula: see text] and 0.236 Tbit[Formula: see text]s[Formula: see text] throughput in a 9[Formula: see text]kW envelope and single rack footprint. The output data rate is 260 MB[Formula: see text]s[Formula: see text] for 9-s time averaging of cross-power and 1[Formula: see text]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.

Publisher

World Scientific Pub Co Pte Lt

Subject

Astronomy and Astrophysics,Instrumentation

Link

https://www.worldscientific.com/doi/pdf/10.1142/S2251171715500038

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