The Square Kilometre Array (SKA)

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CABSim: A cycle-accurate array processor simulation environment for digital radio astronomy

IEEE International Symposium on Phased Array Systems and Technology (2010) 680-685

Authors:

RP Armstrong, ME Jones

Abstract:

Gigahertz-frequency phased arrays that are integral to next-generation radio astronomy instruments, in particular the Square Kilometre Array (SKA) radio telescope, pose a significant signal processing challenge. We argue that the development of high-performance signal processing systems is critical, not only for the particular application to future radio astronomy instrumentation, but also to the entire field of ultra-wideband phased arrays in the gigahertz bandwidth range. To this end, we have developed a cycle-accurate simulator environment and programming language for a novel, massively multicore array processor, and prototyped on it representative digital frequency domain algorithms. The results of this analysis reveal beamforming as a low compute-to-I/O processing task, best suited to high- I/O-bandwidth, streaming signal processing systems. © 2010 IEEE.
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OSKAR: Simulating digital beamforming for the SKA aperture array

IEEE International Symposium on Phased Array Systems and Technology (2010) 690-694

Authors:

BJ Mort, F Dulwich, S Salvini, KZ Adami, ME Jones

Abstract:

Digital beamforming for the aperture array components of the Square Kilometre Array (SKA) poses considerable computational challenges. We propose a hierarchical scheme aimed at tackling them and introduce OSKAR, a beamforming simulator which implements these ideas and algorithms. The simulator continues to be developed to investigate possible designs for the custom devices envisaged for phase 1 of the SKA construction. © 2010 IEEE.
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Polarisation performance and calibration of the digital beamforming system for 2-PAD

IEEE International Symposium on Phased Array Systems and Technology (2010) 686-689

Authors:

RP Armstrong, J Hickish, KZ Adami, ME Jones

Abstract:

In this paper, we report on calibration and polarisation performance of the 2PAD digital beamforming system, a pathfinder instrument for large-N, high-frequency phased-array radio instruments, in particular the Square Kilometre Array (SKA) radio telescope. We review the design of the digital system, and report on instrumental calibration approaches. © 2010 IEEE.
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On the nature of the "radio quiet" black hole binaries

(2010)

Authors:

Paolo Soleri, Rob Fender
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Blazars in the Fermi Era: The OVRO 40-m Telescope Monitoring Program

(2010)

Authors:

Joseph L Richards, Walter Max-Moerbeck, Vasiliki Pavlidou, Oliver G King, Timothy J Pearson, Anthony CS Readhead, Rodrigo Reeves, Martin C Shepherd, Matthew A Stevenson, Lawrence C Weintraub, Lars Fuhrmann, Emmanouil Angelakis, J Anton Zensus, Stephen E Healey, Roger W Romani, Michael S Shaw, Keith Grainge, Mark Birkinshaw, Katy Lancaster, Diana M Worrall, Gregory B Taylor, Garret Cotter, Ricardo Bustos
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