scholarly journals The Australian Square Kilometre Array Pathfinder: System Architecture and Specifications of the Boolardy Engineering Test Array

2014 ◽  
Vol 31 ◽  
Author(s):  
A. W. Hotan ◽  
J. D. Bunton ◽  
L. Harvey-Smith ◽  
B. Humphreys ◽  
B. D. Jeffs ◽  
...  
Keyword(s):  
Signal Processing ◽  
Radio Telescope ◽  
System Architecture ◽  
Phased Array ◽  
Wide Field ◽  
Test Array ◽  
Square Kilometre Array ◽  
Field Calibration ◽  
Calibration Methods ◽  
Pointed Observation

AbstractThis paper describes the system architecture of a newly constructed radio telescope – the Boolardy engineering test array, which is a prototype of the Australian square kilometre array pathfinder telescope. Phased array feed technology is used to form multiple simultaneous beams per antenna, providing astronomers with unprecedented survey speed. The test array described here is a six-antenna interferometer, fitted with prototype signal processing hardware capable of forming at least nine dual-polarisation beams simultaneously, allowing several square degrees to be imaged in a single pointed observation. The main purpose of the test array is to develop beamforming and wide-field calibration methods for use with the full telescope, but it will also be capable of limited early science demonstrations.

scholarly journals The Australian Square Kilometre Array Pathfinder: Performance of the Boolardy Engineering Test Array

2016 ◽  
Vol 33 ◽  
Author(s):  
D. McConnell ◽  
J. R. Allison ◽  
K. Bannister ◽  
M. E. Bell ◽  
H. E. Bignall ◽  
...  
Keyword(s):  
Image Quality ◽  
Radio Telescope ◽  
Phased Array ◽  
Aperture Synthesis ◽  
Imaging Procedures ◽  
Test Array ◽  
Square Kilometre Array ◽  
Performance Sensitivity ◽  
Beam Characteristics ◽  
Beam Aperture

AbstractWe describe the performance of the Boolardy Engineering Test Array, the prototype for the Australian Square Kilometre Array Pathfinder telescope. Boolardy Engineering Test Array is the first aperture synthesis radio telescope to use phased array feed technology, giving it the ability to electronically form up to nine dual-polarisation beams. We report the methods developed for forming and measuring the beams, and the adaptations that have been made to the traditional calibration and imaging procedures in order to allow BETA to function as a multi-beam aperture synthesis telescope. We describe the commissioning of the instrument and present details of Boolardy Engineering Test Array’s performance: sensitivity, beam characteristics, polarimetric properties, and image quality. We summarise the astronomical science that it has produced and draw lessons from operating Boolardy Engineering Test Array that will be relevant to the commissioning and operation of the final Australian Square Kilometre Array Path telescope.

scholarly journals Digital Predistortion of Phased-Array Transmitter With Shared Feedback and Far-Field Calibration

2021 ◽  
Vol 69 (1) ◽  
pp. 1000-1015
Author(s):  
Nuutti Tervo ◽  
Bilal Khan ◽  
Olli Kursu ◽  
Janne P. Aikio ◽  
Markku Jokinen ◽  
...  
Keyword(s):  
Phased Array ◽  
Far Field ◽  
Digital Predistortion ◽  
Field Calibration

scholarly journals Status of the Thai 40-m Radio Telescope

2017 ◽  
Vol 13 (S337) ◽  
pp. 346-347
Author(s):  
Phrudth Jaroenjittichai
Keyword(s):  
Radio Telescope ◽  
Radio Astronomy ◽  
Time Domain ◽  
Phased Array ◽  
Low Frequency ◽  
Great Leap ◽  
Great Leap Forward ◽  
Astronomical Research ◽  
L Band ◽  
K Band

AbstractSince the first light of the 2.4-m Thai National Telescope in 2013, Thailand foresees another great leap forward in astronomy. A project known as “Radio Astronomy Network and Geodesy for Development” (RANGD) by National Astronomical Research Institute of Thailand (NARIT) has been approved for year 2017-2021. A 40-m radio telescope has been planned to operate up to 115-GHz observation with prime-focus capability for low frequency and phased array feed receivers. The telescope’s first light is expected in late 2019 with a cryogenics K-band and L-band receivers. RFI environment at the site has been investigated and shown to be at reasonable level. A 13-m VGOS telescope is also included for geodetic applications. Early single-dish science will focus on time domain observations, such as pulsars and transients, outbursts and variability of maser and AGN sources.

Hacotization of discretization and quantization conditions in radar systems with digital phased antenna grates

2021 ◽  
Author(s):  
Yu.N. Gorbunov ◽  
G.L. Akopyan ◽  
R.K. Burnosov
Keyword(s):  
Signal Processing ◽  
Phased Array ◽  
Frequency Selectivity ◽  
Time Signal ◽  
Stochastic Quantization ◽  
Phased Array Antennas ◽  
Radar Systems ◽  
Array Antennas ◽  
Time Space ◽  
Spatial Frequencies

The article establishes a connection between the directional properties of digital phased array antennas (FAR) in radar systems by means of space-time signal processing, based on the use of stochastic quantization scales in time, space and level, leading to a decrease in the influence of sampling noise and quantization in the process of diagram formation and the formation of frequency selectivity "narrowed" (in the usual and spatial frequencies - angular directions) frequency channels, formed by increasing the size of spatial and temporal samples.

Smart System Architecture for Sensors with Integrated Signal Processing and AI

2021 ◽  
Author(s):  
Gerhard Lammel ◽  
Rainer Dorsch ◽  
Timo Giesselmann ◽  
Jens Goldeck ◽  
Jochen Hahn ◽  
...  
Keyword(s):  
Signal Processing ◽  
System Architecture ◽  
Smart System
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