Title:	Progression of digital-receiver architecture: From MWA to SKA1-Low, and beyond
Authors:	Girish, B.S. Reddy, S. Harshavardhan Sethi, Shiv Srivani, K.S. Abhishek, R. Ajithkumar, B. Bhattramakki, Sahana Buch, Kaushal Chaudhuri, Sandeep Gupta, Yashwant Kamini, P.A. Kudale, Sanjay Madhavi, S. Muley, Mekhala Prabu, T. Raghunathan, A. Shelton, G.J.
Issue Date:	31-Mar-2023
Publisher:	Indian Academy of Sciences
Citation:	Journal of Astrophysics and Astronomy, 2023, Vol. 44, Article No. 28
Abstract:	Backed by advances in digital electronics, signal processing, computation and storage technologies, aperture arrays, which had strongly influenced the design of telescopes in the early years of radio astronomy, have made a comeback. Amid all these developments, an international effort to design and build the world’s largest radio telescope, the Square Kilometre Array (SKA), is ongoing. With its vast collecting area of 1 km2 , the SKA is envisaged to provide unsurpassed sensitivity and leverage technological advances to implement a complex receiver to provide a large field of view through multiple beams on the sky. Many pathfinders and precursor aperture array telescopes for the SKA, operating in the frequency range of 10–300 MHz, have been constructed and operationalized to obtain valuable feedback on scientific, instrumental and functional aspects. This review article looks explicitly into the progression of digital-receiver architecture from the Murchison Widefield Array (precursor) to the SKA1-Low. It highlights the technological advances in analog-to-digital converters (ADCs), field-programmable gate arrays (FPGAs) and central processing unit–graphics processing unit (CPU–GPU) hybrid platforms around which complex digital signal processing systems implement efficient channelizers, beamformers and correlators. The article concludes with a preview of the design of a new generation signal processing platform based on radio frequency system-on-chip (RFSoC).
Description:	Open Access from Indian Academy of Sciences
URI:	http://hdl.handle.net/2289/8074
ISSN:	0250-6335 0973-7758 (Online)
Alternative Location:	https://doi.org/10.1007/s12036-023-09921-3
Copyright:	2023 Indian Academy of Sciences, Bengaluru
Appears in Collections:	Research Papers (A&A)

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