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S W Amy - One of the best experts on this subject based on the ideXlab platform.

  • the australian square kilometre array pathfinder system architecture and specifications of the boolardy engineering test array
    arXiv: Instrumentation and Methods for Astrophysics, 2014
    Co-Authors: A W Hotan, L Harveysmith, B Humphreys, Brian D. Jeffs, T Shimwell, J Tuthill, M A Voronkov, J D Bunton, G S Allen, S W Amy
    Abstract:

    This 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 6-antenna interferometer, fitted with prototype Signal Processing Hardware capable of forming at least 9 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.

  • the australian square kilometre array pathfinder system architecture and specifications of the boolardy engineering test array
    Publications of the Astronomical Society of Australia, 2014
    Co-Authors: A W Hotan, L Harveysmith, John D Bunton, B Humphreys, Brian D. Jeffs, T Shimwell, J Tuthill, M A Voronkov, G Allen, S W Amy
    Abstract:

    This 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.

A W Hotan - One of the best experts on this subject based on the ideXlab platform.

  • the australian square kilometre array pathfinder system architecture and specifications of the boolardy engineering test array
    arXiv: Instrumentation and Methods for Astrophysics, 2014
    Co-Authors: A W Hotan, L Harveysmith, B Humphreys, Brian D. Jeffs, T Shimwell, J Tuthill, M A Voronkov, J D Bunton, G S Allen, S W Amy
    Abstract:

    This 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 6-antenna interferometer, fitted with prototype Signal Processing Hardware capable of forming at least 9 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.

  • the australian square kilometre array pathfinder system architecture and specifications of the boolardy engineering test array
    Publications of the Astronomical Society of Australia, 2014
    Co-Authors: A W Hotan, L Harveysmith, John D Bunton, B Humphreys, Brian D. Jeffs, T Shimwell, J Tuthill, M A Voronkov, G Allen, S W Amy
    Abstract:

    This 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.

Arash Parsa - One of the best experts on this subject based on the ideXlab platform.

  • a scalable correlator architecture based on modular fpga Hardware reuseable gateware and data packetization
    Publications of the Astronomical Society of the Pacific, 2008
    Co-Authors: Aaron R Parsons, Dan Werthimer, D C Backer, Andrew Siemion, Henry Chen, Pierre Droz, Terry Filiba, Jason Manley, Peter L Mcmahon, Arash Parsa
    Abstract:

    ABSTRACT. A new generation of radio telescopes is achieving unprecedented levels of sensitivity and resolution, as well as increased agility and field of view, by employing high-performance digital Signal-Processing Hardware to phase and correlate Signals from large numbers of antennas. The computational demands of these imaging systems scale in proportion to BMN2 B M N 2 , where B B is the Signal bandwidth, M M is the number of independent beams, and N N is the number of antennas. The specifications of many new arrays lead to demands in excess of tens of PetaOps per second. To meet this challenge, we have developed a general-purpose correlator architecture using standard 10-Gbit Ethernet switches to pass data between flexible Hardware modules containing Field Programmable Gate Array (FPGA) chips. These chips are programmed using open-source Signal-Processing libraries that we have developed to be flexible, scalable, and chip-independent. This work reduces the time and cost of implementing a wide range of...

  • a scalable correlator architecture based on modular fpga Hardware reuseable gateware and data packetization
    arXiv: Astrophysics, 2008
    Co-Authors: Aaron R Parsons, D C Backer, Henry Chen, Pierre Droz, Terry Filiba, Jason Manley, Peter L Mcmahon, Arash Parsa, David Macmahon, Andrew Siemion
    Abstract:

    A new generation of radio telescopes is achieving unprecedented levels of sensitivity and resolution, as well as increased agility and field-of-view, by employing high-performance digital Signal Processing Hardware to phase and correlate large numbers of antennas. The computational demands of these imaging systems scale in proportion to BMN^2, where B is the Signal bandwidth, M is the number of independent beams, and N is the number of antennas. The specifications of many new arrays lead to demands in excess of tens of PetaOps per second. To meet this challenge, we have developed a general purpose correlator architecture using standard 10-Gbit Ethernet switches to pass data between flexible Hardware modules containing Field Programmable Gate Array (FPGA) chips. These chips are programmed using open-source Signal Processing libraries we have developed to be flexible, scalable, and chip-independent. This work reduces the time and cost of implementing a wide range of Signal Processing systems, with correlators foremost among them,and facilitates upgrading to new generations of Processing technology. We present several correlator deployments, including a 16-antenna, 200-MHz bandwidth, 4-bit, full Stokes parameter application deployed on the Precision Array for Probing the Epoch of Reionization.

S. W. Kang - One of the best experts on this subject based on the ideXlab platform.

  • Implementation of gas sampling chamber and measuring Hardware for capnograph system considering thermal noise effect and time response characteristics
    2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2001
    Co-Authors: I. Y. Park, K.m. Kang, B. S. Song, S. W. Kang
    Abstract:

    Most capnograph systems that can indirectly determine the partial pressure of carbon dioxide in the blood of a patient are based on NDIR (non-dispersive infrared) absorption technology. As such an NDIR gas analyzing method requires an optical absorption chamber and Signal Processing Hardware. Accordingly, this paper designed and implemented an NDIR type CO/sub 2/ gas chamber while considering the time response characteristics and lamp chopping frequency. In addition, Signal Processing Hardware using two infrared sources was implemented to reduce the thermal background effect. The gas chamber and Signal Processing Hardware has been tested using temperature variation and human expiration experiment. The results showed that the system could produce a stable output Signal and discerning CO/sub 2/ gas concentration curve similar to a typical capnogram.

  • an implementation of ndir type co_2 gas sample chamber and measuring Hardware for capnograph system in consideration of the time response characteristics
    Journal of Sensor Science and Technology, 2001
    Co-Authors: Ilyong Park, K.m. Kang, S. W. Kang, I K Lee, Seungha Lee, Jinho Cho
    Abstract:

    The capnograph system for determining the partial pressure of carbon dioxide in the blood of a patient was developed based on the NDIR(non-dispersive infrared) absorption technology. NDIR gas analyzing method requires an optical absorption chamber and Signal Processing Hardware. In this paper, we have designed and implemented NDIR type gas chamber in consideration of the time response characteristics and lamp chopping frequency. And we have implemented Signal Processing Hardware using two infrared sources to reduce the thermal background effect. The implemented gas chamber and Signal Processing Hardware were tested in the temperature variation experiment and human expiratory experiment. The results showed that the system could produce a stable output Signal and a good gas concentration curve like a typical capnogram.

T Shimwell - One of the best experts on this subject based on the ideXlab platform.

  • the australian square kilometre array pathfinder system architecture and specifications of the boolardy engineering test array
    arXiv: Instrumentation and Methods for Astrophysics, 2014
    Co-Authors: A W Hotan, L Harveysmith, B Humphreys, Brian D. Jeffs, T Shimwell, J Tuthill, M A Voronkov, J D Bunton, G S Allen, S W Amy
    Abstract:

    This 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 6-antenna interferometer, fitted with prototype Signal Processing Hardware capable of forming at least 9 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.

  • the australian square kilometre array pathfinder system architecture and specifications of the boolardy engineering test array
    Publications of the Astronomical Society of Australia, 2014
    Co-Authors: A W Hotan, L Harveysmith, John D Bunton, B Humphreys, Brian D. Jeffs, T Shimwell, J Tuthill, M A Voronkov, G Allen, S W Amy
    Abstract:

    This 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.