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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6214
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dc.contributor.authorPrabu, T.-
dc.contributor.authorSrivani, K.S.-
dc.contributor.authorKamini, P.A.-
dc.contributor.authorMadhavi, S.-
dc.contributor.authorDeshpande, A.A.-
dc.contributor.authorUdaya Shankar, N.-
dc.contributor.authorSubrahmanyan, Ravi-
dc.contributor.authorGopalakrishna, M.R.-
dc.contributor.authorKumar, Deepak-
dc.contributor.author+45 Co-authors-
dc.date.accessioned2015-05-05T18:17:03Z-
dc.date.available2015-05-05T18:17:03Z-
dc.date.issued2015-03-
dc.identifier.citationExperimental Astronomy, 2015, Vol. 39, p73-93en
dc.identifier.issn1572-9508-
dc.identifier.issn0922-6435 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/6214-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en
dc.description.abstractAn 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.en
dc.language.isoenen
dc.publisherSpringeren
dc.relation.urihttp://arxiv.org/abs/1502.05015en
dc.relation.urihttp://adsabs.harvard.edu/doi/10.1007/s10686-015-9444-3en
dc.relation.urihttp://dx.doi.org/10.1007/s10686-015-9444-3en
dc.rights2015 Springeren
dc.titleA digital receiver for the Murchison Widefield arrayen
dc.typeArticleen
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