A digital-receiver for the MurchisonWidefield Array

Thiagaraj Prabu; K. S. Srivani; D. Anish Roshi; P. A. Kamini; S. Madhavi; David Emrich; Brian Crosse; Andrew J. Williams; Mark Waterson; Avinash A. Deshpande; N. Udaya Shankar; Ravi Subrahmanyan; Frank H. Briggs; Robert F. Goeke; Steven J. Tingay; Melanie Johnston-Hollitt; Gopalakrishna M. R; Edward H. Morgan; Joseph Pathikulangara; John D. Bunton; Grant Hampson; Christopher Williams; Stephen M. Ord; Randall B. Wayth; Deepak Kumar; Miguel F. Morales; Ludi deSouza; Eric Kratzenberg; D. Pallot; Russell McWhirter; Bryna J. Hazelton; Wayne Arcus; David G. Barnes; Gianni Bernardi; T. Booler; Judd D. Bowman; Roger J. Cappallo; Brian E. Corey; Lincoln J. Greenhill; David Herne; Jacqueline N. Hewitt; David L. Kaplan; Justin C. Kasper; Barton B. Kincaid; Ronald Koenig; Colin J. Lonsdale; Mervyn J. Lynch; Daniel A. Mitchell; Divya Oberoi; Ronald A. Remillard; Alan E. Rogers; Joseph E. Salah; Robert J. Sault; Jamie B. Stevens; S. Tremblay; Rachel L. Webster; Alan R. Whitney; Stuart B. Wyithe

doi:10.1007/s10686-015-9444-3

A digital-receiver for the MurchisonWidefield Array

Thiagaraj Prabu^*, K. S. Srivani, D. Anish Roshi, P. A. Kamini, S. Madhavi, David Emrich, Brian Crosse, Andrew J. Williams, Mark Waterson, Avinash A. Deshpande, N. Udaya Shankar, Ravi Subrahmanyan, Frank H. Briggs, Robert F. Goeke, Steven J. Tingay, Melanie Johnston-Hollitt, Gopalakrishna M. R, Edward H. Morgan, Joseph Pathikulangara, John D. BuntonGrant Hampson, Christopher Williams, Stephen M. Ord, Randall B. Wayth, Deepak Kumar, Miguel F. Morales, Ludi deSouza, Eric Kratzenberg, D. Pallot, Russell McWhirter, Bryna J. Hazelton, Wayne Arcus, David G. Barnes, Gianni Bernardi, T. Booler, Judd D. Bowman, Roger J. Cappallo, Brian E. Corey, Lincoln J. Greenhill, David Herne, Jacqueline N. Hewitt, David L. Kaplan, Justin C. Kasper, Barton B. Kincaid, Ronald Koenig, Colin J. Lonsdale, Mervyn J. Lynch, Daniel A. Mitchell, Divya Oberoi, Ronald A. Remillard, Alan E. Rogers, Joseph E. Salah, Robert J. Sault, Jamie B. Stevens, S. Tremblay, Rachel L. Webster, Alan R. Whitney, Stuart B. Wyithe

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

An FPGA-based digital-receiver has been developed for a low-frequency imaging radio interferometer, the Murchison Widefield Array (MWA). The MWA, located at the Murchison Radio-astronomy Observatory (MRO) in Western Australia, consists of 128 dual-polarized aperture-array elements (tiles) operating between 80 and 300 MHz, with a total processed bandwidth of 30.72 MHz for each polarization. Radio-frequency signals from the tiles are amplified and band limited using analog signal conditioning units; sampled and channelized by digital-receivers. The signals from eight tiles are processed by a single digital-receiver, thus requiring 16 digital-receivers for the MWA. The main function of the digital-receivers is to digitize the broad-band signals from each tile, channelize them to form the sky-band, and transport it through optical fibers to a centrally located correlator for further processing. The digital-receiver firmware also implements functions to measure the signal power, perform power equalization across the band, detect interference-like events, and invoke diagnostic modes. The digital-receiver is controlled by high-level programs running on a single-board-computer. This paper presents the digital-receiver design, implementation, current status, and plans for future enhancements.

Original language	English
Pages (from-to)	73-93
Number of pages	21
Journal	Experimental Astronomy
Volume	39
Issue number	1
DOIs	https://doi.org/10.1007/s10686-015-9444-3
Publication status	Published - 1 Mar 2015

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Prabu, T., Srivani, K. S., Roshi, D. A., Kamini, P. A., Madhavi, S., Emrich, D., Crosse, B., Williams, A. J., Waterson, M., Deshpande, A. A., Shankar, N. U., Subrahmanyan, R., Briggs, F. H., Goeke, R. F., Tingay, S. J., Johnston-Hollitt, M., R, G. M., Morgan, E. H., Pathikulangara, J., ... Wyithe, S. B. (2015). A digital-receiver for the MurchisonWidefield Array. Experimental Astronomy, 39(1), 73-93. https://doi.org/10.1007/s10686-015-9444-3

@article{4f6b89af077841399277710085da690c,

title = "A digital-receiver for the MurchisonWidefield Array",

abstract = "An FPGA-based digital-receiver has been developed for a low-frequency imaging radio interferometer, the Murchison Widefield Array (MWA). The MWA, located at the Murchison Radio-astronomy Observatory (MRO) in Western Australia, consists of 128 dual-polarized aperture-array elements (tiles) operating between 80 and 300 MHz, with a total processed bandwidth of 30.72 MHz for each polarization. Radio-frequency signals from the tiles are amplified and band limited using analog signal conditioning units; sampled and channelized by digital-receivers. The signals from eight tiles are processed by a single digital-receiver, thus requiring 16 digital-receivers for the MWA. The main function of the digital-receivers is to digitize the broad-band signals from each tile, channelize them to form the sky-band, and transport it through optical fibers to a centrally located correlator for further processing. The digital-receiver firmware also implements functions to measure the signal power, perform power equalization across the band, detect interference-like events, and invoke diagnostic modes. The digital-receiver is controlled by high-level programs running on a single-board-computer. This paper presents the digital-receiver design, implementation, current status, and plans for future enhancements.",

keywords = "ADC, Channelizer, Digital-receiver, FPGA, MRO, MWA, PFB, Radio astronomy instrumentation, Radio telescope, SKA",

author = "Thiagaraj Prabu and Srivani, {K. S.} and Roshi, {D. Anish} and Kamini, {P. A.} and S. Madhavi and David Emrich and Brian Crosse and Williams, {Andrew J.} and Mark Waterson and Deshpande, {Avinash A.} and Shankar, {N. Udaya} and Ravi Subrahmanyan and Briggs, {Frank H.} and Goeke, {Robert F.} and Tingay, {Steven J.} and Melanie Johnston-Hollitt and R, {Gopalakrishna M.} and Morgan, {Edward H.} and Joseph Pathikulangara and Bunton, {John D.} and Grant Hampson and Christopher Williams and Ord, {Stephen M.} and Wayth, {Randall B.} and Deepak Kumar and Morales, {Miguel F.} and Ludi deSouza and Eric Kratzenberg and D. Pallot and Russell McWhirter and Hazelton, {Bryna J.} and Wayne Arcus and Barnes, {David G.} and Gianni Bernardi and T. Booler and Bowman, {Judd D.} and Cappallo, {Roger J.} and Corey, {Brian E.} and Greenhill, {Lincoln J.} and David Herne and Hewitt, {Jacqueline N.} and Kaplan, {David L.} and Kasper, {Justin C.} and Kincaid, {Barton B.} and Ronald Koenig and Lonsdale, {Colin J.} and Lynch, {Mervyn J.} and Mitchell, {Daniel A.} and Divya Oberoi and Remillard, {Ronald A.} and Rogers, {Alan E.} and Salah, {Joseph E.} and Sault, {Robert J.} and Stevens, {Jamie B.} and S. Tremblay and Webster, {Rachel L.} and Whitney, {Alan R.} and Wyithe, {Stuart B.}",

note = "Publisher Copyright: {\textcopyright} 2015, Springer Science+Business Media Dordrecht.",

year = "2015",

month = mar,

day = "1",

doi = "10.1007/s10686-015-9444-3",

language = "English",

volume = "39",

pages = "73--93",

journal = "Experimental Astronomy",

issn = "0922-6435",

publisher = "Springer Netherlands",

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Prabu, T, Srivani, KS, Roshi, DA, Kamini, PA, Madhavi, S, Emrich, D, Crosse, B, Williams, AJ, Waterson, M, Deshpande, AA, Shankar, NU, Subrahmanyan, R, Briggs, FH, Goeke, RF, Tingay, SJ, Johnston-Hollitt, M, R, GM, Morgan, EH, Pathikulangara, J, Bunton, JD, Hampson, G, Williams, C, Ord, SM, Wayth, RB, Kumar, D, Morales, MF, deSouza, L, Kratzenberg, E, Pallot, D, McWhirter, R, Hazelton, BJ, Arcus, W, Barnes, DG, Bernardi, G, Booler, T, Bowman, JD, Cappallo, RJ, Corey, BE, Greenhill, LJ, Herne, D, Hewitt, JN, Kaplan, DL, Kasper, JC, Kincaid, BB, Koenig, R, Lonsdale, CJ, Lynch, MJ, Mitchell, DA, Oberoi, D, Remillard, RA, Rogers, AE, Salah, JE, Sault, RJ, Stevens, JB, Tremblay, S, Webster, RL, Whitney, AR & Wyithe, SB 2015, 'A digital-receiver for the MurchisonWidefield Array', Experimental Astronomy, vol. 39, no. 1, pp. 73-93. https://doi.org/10.1007/s10686-015-9444-3

TY - JOUR

T1 - A digital-receiver for the MurchisonWidefield Array

AU - Prabu, Thiagaraj

AU - Srivani, K. S.

AU - Roshi, D. Anish

AU - Kamini, P. A.

AU - Madhavi, S.

AU - Emrich, David

AU - Crosse, Brian

AU - Williams, Andrew J.

AU - Waterson, Mark

AU - Deshpande, Avinash A.

AU - Shankar, N. Udaya

AU - Subrahmanyan, Ravi

AU - Briggs, Frank H.

AU - Goeke, Robert F.

AU - Tingay, Steven J.

AU - Johnston-Hollitt, Melanie

AU - R, Gopalakrishna M.

AU - Morgan, Edward H.

AU - Pathikulangara, Joseph

AU - Bunton, John D.

AU - Hampson, Grant

AU - Williams, Christopher

AU - Ord, Stephen M.

AU - Wayth, Randall B.

AU - Kumar, Deepak

AU - Morales, Miguel F.

AU - deSouza, Ludi

AU - Kratzenberg, Eric

AU - Pallot, D.

AU - McWhirter, Russell

AU - Hazelton, Bryna J.

AU - Arcus, Wayne

AU - Barnes, David G.

AU - Bernardi, Gianni

AU - Booler, T.

AU - Bowman, Judd D.

AU - Cappallo, Roger J.

AU - Corey, Brian E.

AU - Greenhill, Lincoln J.

AU - Herne, David

AU - Hewitt, Jacqueline N.

AU - Kaplan, David L.

AU - Kasper, Justin C.

AU - Kincaid, Barton B.

AU - Koenig, Ronald

AU - Lonsdale, Colin J.

AU - Lynch, Mervyn J.

AU - Mitchell, Daniel A.

AU - Oberoi, Divya

AU - Remillard, Ronald A.

AU - Rogers, Alan E.

AU - Salah, Joseph E.

AU - Sault, Robert J.

AU - Stevens, Jamie B.

AU - Tremblay, S.

AU - Webster, Rachel L.

AU - Whitney, Alan R.

AU - Wyithe, Stuart B.

PY - 2015/3/1

Y1 - 2015/3/1

N2 - An FPGA-based digital-receiver has been developed for a low-frequency imaging radio interferometer, the Murchison Widefield Array (MWA). The MWA, located at the Murchison Radio-astronomy Observatory (MRO) in Western Australia, consists of 128 dual-polarized aperture-array elements (tiles) operating between 80 and 300 MHz, with a total processed bandwidth of 30.72 MHz for each polarization. Radio-frequency signals from the tiles are amplified and band limited using analog signal conditioning units; sampled and channelized by digital-receivers. The signals from eight tiles are processed by a single digital-receiver, thus requiring 16 digital-receivers for the MWA. The main function of the digital-receivers is to digitize the broad-band signals from each tile, channelize them to form the sky-band, and transport it through optical fibers to a centrally located correlator for further processing. The digital-receiver firmware also implements functions to measure the signal power, perform power equalization across the band, detect interference-like events, and invoke diagnostic modes. The digital-receiver is controlled by high-level programs running on a single-board-computer. This paper presents the digital-receiver design, implementation, current status, and plans for future enhancements.

AB - An FPGA-based digital-receiver has been developed for a low-frequency imaging radio interferometer, the Murchison Widefield Array (MWA). The MWA, located at the Murchison Radio-astronomy Observatory (MRO) in Western Australia, consists of 128 dual-polarized aperture-array elements (tiles) operating between 80 and 300 MHz, with a total processed bandwidth of 30.72 MHz for each polarization. Radio-frequency signals from the tiles are amplified and band limited using analog signal conditioning units; sampled and channelized by digital-receivers. The signals from eight tiles are processed by a single digital-receiver, thus requiring 16 digital-receivers for the MWA. The main function of the digital-receivers is to digitize the broad-band signals from each tile, channelize them to form the sky-band, and transport it through optical fibers to a centrally located correlator for further processing. The digital-receiver firmware also implements functions to measure the signal power, perform power equalization across the band, detect interference-like events, and invoke diagnostic modes. The digital-receiver is controlled by high-level programs running on a single-board-computer. This paper presents the digital-receiver design, implementation, current status, and plans for future enhancements.

KW - ADC

KW - Channelizer

KW - Digital-receiver

KW - FPGA

KW - MRO

KW - MWA

KW - PFB

KW - Radio astronomy instrumentation

KW - Radio telescope

KW - SKA

UR - http://www.scopus.com/inward/record.url?scp=84953361122&partnerID=8YFLogxK

U2 - 10.1007/s10686-015-9444-3

DO - 10.1007/s10686-015-9444-3

M3 - Article

SN - 0922-6435

VL - 39

SP - 73

EP - 93

JO - Experimental Astronomy

JF - Experimental Astronomy

IS - 1

ER -

A digital-receiver for the MurchisonWidefield Array

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