Ska Correlator Advances

  • John D. Bunton
Chapter

Abstract

When the SKA was proposed, a major technical obstacle to its feasibility was the cost of the correlator. Significant advances made in correlator design since then are described. These advances have made SKA correlators possible within reasonable cost constraints. At the same time performance issues with the proposed FX architecture have been addressed.

Keywords

correlator FX XF filterbank radio astronomy SKA 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bhatnagar, S.: 2001, Radio Study of Galactic Supernova Remnants and the Interstellar Medium, PhD dissertation, University of Pune, India. Available at http://www.ncra.tifr.res.in/~sanjay/thesis/node31.html.Google Scholar
  2. Benson, J.: 1995, in J. A. Zensus, P. J. Diamond and J. Napier (eds.), ASP Conference Series, Vol. 82, Astronomical Society of the Pacific, San Francisco.Google Scholar
  3. Bunton, J. D.: 2000, An Improved FX correlator, Alma Memo 342, Nov. 2000. Available at http://www.alma.nrao.edu/memos/html-memos/abstracts/abs342.html.Google Scholar
  4. Bunton, J. D.: 2001a, A Cross Multiply Accumulate Unit for FX Correlators, Alma Memo 392, Sep. 2001. Available at http://www.alma.nrao.edu/memos/html-memos/abstracts/abs342.html.Google Scholar
  5. Bunton, J. D.: 2001b, ‘FX Correlators for the SKA’, The SKA: Defining the Future, Berkeley Workshop, July 2001. Available at http://www.skatelescope.org/skaberkeley/.Google Scholar
  6. Bunton, J. D.: 2001c, ‘Prototype SKA Technologies at Molonglo: 3.Beamformer and Correlator’, The SKA: Defining the Future, Berkeley Workshop, July 2001. Available at http://www.skatelescope.org/skaberkeley/.Google Scholar
  7. Bunton, J. D.: 2002, ‘Correlator Costs for Arrays and Filled Aperture Antenna’, International SKA Conference 2002, Groningen, The Netherlands, 13–15 August 2002. Available at www.lofar.org/ska2002/pdfs/Bunton correlator costs.pdf.Google Scholar
  8. Bunton, J. D.: 2003, Multi-resolution FX Correlator, Alma Memo 447, Feb 2003. Available at http://www.alma.nrao.edu/memos/.Google Scholar
  9. Bunton, J. D. and Adams, T.: 2004, ‘SKAMP Spectral Line Correlator’, SKA2004, Penticton, B.C., Canada, 18–22 July.Google Scholar
  10. Crochiere, R. E. and Rabiner, L. R.: 1983, Multirate Digital Signal Processing, Prentice-Hall, New Jersey.Google Scholar
  11. Carlson, B. R. and Dewdney, P. E.: 2000, ‘Efficient Wideband Digital Correlation’, Electronic Letters, Vol. 36,No. 11, 25 May 2000, pp. 987–988.CrossRefGoogle Scholar
  12. D’Addario, L. and Timoc, C.: 2002, ‘Digital Signal Processing for the SKA’, International SKA Conference 2002, Groningen, The Netherlands, 13—15 August 2002. Available at http:// www.lofar.org/ska2002/pdfs/D’Addario-correlator.pdf.Google Scholar
  13. D’Addario, L. R.: 1989, in Perley, Schwab and Bridle (eds.), Synthesis Imaging in Radioastronomy, Astronomical Society of the Pacific, San Francisco.Google Scholar
  14. Chikada, Y. et al.: 1984, in J. A. Roberts (ed.), Indirect Imaging, Cambridge University Press, Cambridge, U.K., pp. 387–404.Google Scholar
  15. Chikada, Y et al.: 1987, ‘A 6 × 320-Mhz 1024-Channel FFT Cross-spectrum Analyzer for Radio Astronomy’, Proc IEEE 75, 9, pp. 1023–1209, September 1987.Google Scholar
  16. Escoffier, R.: 1997, The MMA Correlator, Alma Memo 166, July 1997. Available at http://www.alma.nrao.edu/memos/html-memos/abstracts/abs166.html.Google Scholar
  17. Ferris, R. H., Bunton, J. D. and Stuber, B.: 2001, ‘A 2GHz Digital Filterbank Correlator’, The SKA: Defining the Future, Berkeley California, July 9–12, 2001. Available at http://www.skatelescope.org/skaberkeley/.Google Scholar
  18. Napier, P. J., Thompson, A. R. and Ekers, R. D.: 1983, ‘the Very Large Array: Design and Performance of a Modern Synthesis Radio Telescope’, Proc. IEEE 71, 11, pp. 1295–1320, Nov. 1983.Google Scholar
  19. Okamura, S. K., Chikada, Y., Momose, M. and Iguchi, S.: 2001, Feasibility Study of the Enhanced Correlator for 3-way ALMA I., Alma Memo 350, February 2001, http://www.nrao.alma.edu/memos/.Google Scholar
  20. Tatke, V. M.: 1998, A Digital Spetral Correlator for GMRT, Master’s Thesis, Indian Institute of Science, Bangalore, India.Google Scholar
  21. Urry, W. L. and Hudson, J. A.: 1995, Correlator Reference Manual. Available at http://astron.berkeley.edu/~bosco/corman.html.Google Scholar
  22. Urry, W. L.: 2000, A Corner Turner Architecture, ATA Memo 14, November 2000. Available at http://astron.berkeley.edu/ral/ATAMemo14.pdf.Google Scholar
  23. Wilson, W. E. and Brown, D. R.: 1987, ‘The Australia Telescope Correlator Chip’, 21st International Electronics Convention and Exhibition of the IREE Aust., Sydney ‘87, pp. 399–402.Google Scholar

Copyright information

© Springer 2005

Authors and Affiliations

  • John D. Bunton
    • 1
  1. 1.CSIRO ICT CentreEppingAustralia

Personalised recommendations