Calibratability and its impact on configuration design for the LOFAR and SKA phased array radio telescopes

Radio Science ◽  
2011 ◽  
Vol 46 (5) ◽  
pp. n/a-n/a ◽  
Author(s):  
S. J. Wijnholds ◽  
J. D. Bregman ◽  
A. van Ardenne
Keyword(s):  
Phased Array ◽  
Configuration Design ◽  
Radio Telescopes

StarWatch 3.0: Visualizing Wave Patterns of Phased Array Radio Telescopes

2017 ◽  
Author(s):  
Stanislav Klimenko ◽  
Kira Konich ◽  
Igor Nikitin ◽  
Lialia Nikitina
Keyword(s):  
Phased Array ◽  
Radio Telescopes ◽  
Wave Patterns

Joint calibration and imaging for phased array radio telescopes

2018 ◽  
Vol 483 (4) ◽  
pp. 5672-5686
Author(s):  
Liying Wei ◽  
Stefan J Wijnholds
Keyword(s):  
Phased Array ◽  
Radio Telescopes

A Wideband Digital Back-End for the Upgraded GMRT

2017 ◽  
Vol 06 (01) ◽  
pp. 1641011 ◽  
Author(s):  
Suda Harshavardhan Reddy ◽  
Sanjay Kudale ◽  
Upendra Gokhale ◽  
Irappa Halagalli ◽  
Nilesh Raskar ◽  
...  
Keyword(s):  
Spectral Line ◽  
Real Time ◽  
Hybrid System ◽  
Phased Array ◽  
The Novel ◽  
Radio Telescopes ◽  
Next Generation ◽  
Present Sample ◽  
Voltage Mode ◽  
Processing Power

Traditionally, back-ends for radio telescopes have been built using a hardware-based approach with ASICs, FPGAs, etc. With advancements in processing power of CPUs, software-based systems have emerged as an alternative option, which has received additional impetus with the advent of GPU-based computing. We present here the design of a hybrid system combining the best of FPGAs, CPUs and GPUs, to implement a next generation back-end for the upgraded GMRT. This back-end can process 400 MHz bandwidth signals from 32 dual-polarized antennas, for both interferometry and beamformer applications, including narrowband spectral line modes for the interferometer, incoherent array and phased array mode of operations for the beamfomer, and also a voltage mode attached to a real-time coherent dedispersion system for the beamformer. We describe in detail the design and architecture of this system, including the novel features and capabilities. We also present sample results from the system that validate its performance in conjunction with the entire receiver chain of the upgraded GMRT.

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