University Of Tasmania

File(s) under permanent embargo

A digital-receiver for the Murchison Widefield Array

journal contribution
posted on 2023-05-18, 16:39 authored by 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, Gopalakrishna, MR, 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
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.


Publication title

Experimental Astronomy








School of Natural Sciences


Kluwer Academic Publ

Place of publication

Van Godewijckstraat 30, Dordrecht, Netherlands, 3311 Gz

Rights statement

Copyright 2015 Springer Science+Business Media Dordrecht

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

Usage metrics

    University Of Tasmania