The signal processing chain of the Low Frequency Aperture Array

Date Issued
2020
Author(s)
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Pastore, Sandro
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Rustichelli, Simone
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Chiello, Riccardo
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Zarb Adami, Kris
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Magro, Alessio
DOI
Abstract
The SKA LOW telescope is an interferometer composed of 512 stations. Each station consists of 256 electronically steered antennas. The Low Frequency Aperture Array is the portion of the SKA-LOW telescope including the antennas and the related electronics. The LFAA signal processing chain amplifies, transports and combines the signals from the antennas composing each station into a coherent beam. Beamforming is performed in the frequency domain, with stringent requirements on bandpass flatness, linearity in a RFI contaminated spectral region, and allowed signal degradation. We adopted an architecture including a highly optimized oversampled polyphase filterbank for channelization, and a distributed network beamformer. The system has been validated as part of the Aperture Array Verification System, a single station operating at the SKA site in Western Australia.
Coverage
Ground-based and Airborne Telescopes VIII
All editors
Marshall, H.K.; Spyromilio, J.; Usuda, T.
Series
Volume
11445
Start page
301
Conferenece
Ground-based and Airborne Telescopes VIII
Conferenece place
Online Only, California, United States
Conferenece date
14-18 December, 2020
Uri
Url
Issn Identifier
0277-786X
Ads BibCode
2020SPIE11445E..71C
Rights
open.access
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1144571.pdf

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