All-digital wideband space-frequency beamforming for the SKA aperture array
IEEE International Symposium on Phased Array Systems and Technology (2010) 911-916
Abstract:
In this paper, we consider the problem of optimum multi-domain real-time beamforming and high-precision beam pattern positioning in application to very large wideband array antennas, particularly to the Square Kilometre Array (SKA) aperture array antenna. We present a new structure for wideband space-frequency beamforming and beamsteering that maximizes detectability of cosmic signals over the array operational frequency range. © 2010 IEEE.CABSim: A cycle-accurate array processor simulation environment for digital radio astronomy
IEEE International Symposium on Phased Array Systems and Technology (2010) 680-685
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.OSKAR: Simulating digital beamforming for the SKA aperture array
IEEE International Symposium on Phased Array Systems and Technology (2010) 690-694
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.Polarisation performance and calibration of the digital beamforming system for 2-PAD
IEEE International Symposium on Phased Array Systems and Technology (2010) 686-689
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.Infrared-correlated 31-GHz radio emission from Orion East
\mnras 407 (2010) 2223-2229