Prabu, Thiagaraj ; Srivani, K. S. ; Roshi, D. Anish ; Kamini, P. A. ; Madhavi, S. ; Emrich, David ; Crosse, Brian ; Williams, Andrew J. ; Waterson, Mark ; Deshpande, Avinash A. ; Udaya Shankar, N. ; Subrahmanyan, Ravi ; Briggs, Frank H. ; Goeke, Robert F. ; Tingay, Steven J. ; Johnston-Hollitt, Melanie ; R, Gopalakrishna M ; Morgan, Edward H. ; Pathikulangara, Joseph ; Bunton, John D. ; Hampson, Grant ; Williams, Christopher ; Ord, Stephen M. ; Wayth, Randall B. ; Kumar, Deepak ; Morales, Miguel F. ; deSouza, Ludi ; Kratzenberg, Eric ; Pallot, D. ; McWhirter, Russell ; Hazelton, Bryna J. ; Arcus, Wayne ; Barnes, David G. ; Bernardi, Gianni ; Booler, T. ; Bowman, Judd D. ; Cappallo, Roger J. ; Corey, Brian E. ; Greenhill, Lincoln J. ; Herne, David ; Hewitt, Jacqueline N. ; Kaplan, David L. ; Kasper, Justin C. ; Kincaid, Barton B. ; Koenig, Ronald ; Lonsdale, Colin J. ; Lynch, Mervyn J. ; Mitchell, Daniel A. ; Oberoi, Divya ; Remillard, Ronald A. ; Rogers, Alan E. ; Salah, Joseph E. ; Sault, Robert J. ; Stevens, Jamie B. ; Tremblay, S. ; Webster, Rachel L. ; Whitney, Alan R. ; Wyithe, Stuart B. (2015) A digital-receiver for the Murchison Widefield Array Experimental Astronomy, 39 (1). pp. 73-93. ISSN 0922-6435
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Official URL: https://link.springer.com/article/10.1007%2Fs10686...
Related URL: http://dx.doi.org/10.1007/s10686-015-9444-3
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Springer-Verlag. |
| Keywords: | ADC; Channelizer; Digital-Receiver; FPGA; MWA; MRO; PFB; Radio Astronomy Instrumentation; Radio Telescope; SKA |
| ID Code: | 114372 |
| Deposited On: | 22 May 2018 06:36 |
| Last Modified: | 22 May 2018 06:36 |
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