Real-time beamforming using high-speed FPGAs at the Allen Telescope Array

被引：21

作者：

Barott, William C. ^{[1
,2
]}

Milgrome, Oren ^{[3
]}

Wright, Melvyn ^{[3
]}

MacMahon, David ^{[3
]}

Kilsdonk, Tom ^{[1
]}

Backus, Peter ^{[1
]}

Dexter, Matt ^{[3
]}

机构：

[1] SETI Inst, Mountain View, CA 95070 USA

[2] Embry Riddle Aeronaut Univ, Dept Elect Engn, Daytona Beach, FL 32114 USA

[3] Univ Calif Berkeley, Radio Astron Lab, Berkeley, CA 94720 USA

来源：

RADIO SCIENCE | 2011年 / 46卷

基金：

美国国家科学基金会;

关键词：

RADIO ASTRONOMY; PERFORMANCE; WIDEFIELD; ERRORS;

D O I：

10.1029/2010RS004442

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Allen Telescope Array (ATA) at the Hat Creek Radio Observatory (HCRO) is a wide-field panchromatic radio telescope currently consisting of 42 offset-Gregorian antennas each with a 6 m aperture, with plans to expand the array to 350 antennas. Through unique back-end hardware, the ATA performs real-time wideband beamforming with independent subarray capabilities and customizable beam shaping. The beamformers enable science observations requiring the full gain of the array, time domain (nonintegrated) output, and interference excision or orthogonal beamsets. In this paper we report on the design of this beamformer, including architecture and experimental results. Furthermore, we address some practical considerations in large-N wideband beamformers implemented on field programmable gate array platforms, including device utilization, methods of calibration and control, and interchip synchronization.

引用

页数：17

共 34 条

[1]

AHMAD SU, 2006, INT S CIRC SYST I EL

[2]

[Anonymous], ATA MEMO SER

[3]

ARMSTRONG R, 2009, CASPER MEMO SER, V38

[4]

BAROTT WC, 2006, THESIS GA I TECHNOL

[5] FAST FOURIER TRANSFORM HARDWARE IMPLEMENTATIONS - AN OVERVIEW [J].

BERGLAND, GD .

IEEE TRANSACTIONS ON AUDIO AND ELECTROACOUSTICS, 1969, AU17 (02) :104-&

[6]

BOWER GC, 2002, URSI 2002 GEN ASS IN

[7] BEE2: A high-end reconfigurable computing system [J].

Chang, Chen ;

Wawrzynek, John ;

Brodersen, Robert W. .

IEEE Design and Test of Computers, 2005, 22 (02) :114-125

[8] Australian SKA Pathfinder: A High-Dynamic Range Wide-Field of View Survey Telescope [J].

DeBoer, David R. ;

Gough, Russell G. ;

Bunton, John D. ;

Cornwell, Tim J. ;

Beresford, Ron J. ;

Johnston, Simon ;

Feain, Ilana J. ;

Schinckel, Antony E. ;

Jackson, Carole A. ;

Kesteven, Michael J. ;

Chippendale, Aaron ;

Hampson, Grant A. ;

O'Sullivan, John D. ;

Hay, Stuart G. ;

Jacka, Colin E. ;

Sweetnam, Tony W. ;

Storey, Michelle C. ;

Ball, Lewis ;

Boyle, Brian J. .

PROCEEDINGS OF THE IEEE, 2009, 97 (08) :1507-1521

[9] Argus: An L-band all-sky astronomical surveillance system [J].

Ellingson, Steven W. ;

Hampson, Grant A. ;

Childers, Russell K. .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2008, 56 (02) :294-302

[10] Efficient multibeam synthesis with interference nulling for large arrays [J].

Ellingson, SW ;

Cazemier, W .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2003, 51 (03) :503-511

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