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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7554
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dc.contributor.authorSubrahmanya, C.R.-
dc.contributor.authorSarun, O. S.-
dc.contributor.authorAbhyankar, Y.-
dc.contributor.author+2 Co-Authors-
dc.date.accessioned2020-10-14T08:42:54Z-
dc.date.available2020-10-14T08:42:54Z-
dc.date.issued2020-10-
dc.identifier.citationJournal of Astronomical Instrumentation, 2020, Vol.9, p2050016en_US
dc.identifier.issn2251-1717-
dc.identifier.issn2251-1725(Online)-
dc.identifier.urihttp://hdl.handle.net/2289/7554-
dc.descriptionRestricted Accessen_US
dc.description.abstractModern and upcoming radio telescopes at low frequencies are often characterized by hundreds or thousands of antenna elements operating at wide bandwidths up to about 0.5GHz. A spectral correlator for such an array is required to estimate the cross-power spectrum of the response of each element with that of every other element with a high spectral resolution. The resulting all-to-all connectivity between signals from the entire array poses a serious bottleneck. In this paper, we propose a simple digital receiver architecture that interfaces the digitized time series from a large number of antenna elements to a High-Performance Computing (HPC) cluster through a communication switch to overcome the data ingest bottleneck. Each HPC node can then perform wideband processing in steps of finite but significant time-slices for the entire array. We explain in detail the implementation of our architecture for the proposed expansion of the Ooty Wide Field Array (OWFA) into a 1056 element array. Since the proposed digital receiver is based on Field Programmable Gate Array (FPGA), it can be reconfigured for different applications. This is illustrated by considering the case of Phased Array Feeds (PAF) for the proposed expanded Giant Metrewave Radio Telescope (eGMRT).en_US
dc.language.isoenen_US
dc.publisherWorld Scientific Publishing Companyen_US
dc.relation.urihttps://doi.org/10.1142/S2251171720500166en_US
dc.rights2020 World Scientific Publishing Companyen_US
dc.subjectDigital receiveren_US
dc.subjectcorrelatoren_US
dc.subjectdigital beam formeren_US
dc.subjectphased array feeden_US
dc.subjectFPGAen_US
dc.titleScalable Digital Receiver for Multi-Element Radio Telescopesen_US
dc.typeArticleen_US
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