Paper Abstract and Keywords |
Presentation |
2015-01-29 15:05
An AWF Digital Spectrometer for a Radio Telescope Hiroki Nakahara (Ehime Univ.), Hiroyuki Nakanishi (Kagoshima Univ.), Kazumasa Iwai (NAOJ) VLD2014-122 CPSY2014-131 RECONF2014-55 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
A radio telescope analyzes radio frequency~(RF) received from celestial objects.
It consists of an antenna, a receiver, and a spectrometer.
The spectrometer converts the time domain into the frequency domain by a FFT operation.
In the spectrometer, first, it multiples the window coefficient to the received signal.
Second, it applies the FFT operation.
Third, it converts to the absolute of a complex number.
Finally, to reduce the noise, it accumulates obtained power spectrum.
We call this a WFA spectrometer.
Since an AD converter is faster than the FPGA, a parallel FFT computation is desired.
However, since the amount of hardware for the FFT becomes bottleneck,
the conventional WFA does not realized the high-performance analysis.
This paper proposes an AWF spectrometer which replaces the order of operations.
Since the AWF spectrometer reduces the parallelism of the FFT,
it is smaller than the conventional WFA spectrometer.
Also, the paper proposes a off-chip memory realization which is highly efficient use of the FPGA.
Experimental results show that the proposed AWF spectrometer outperforms conventional spectrometers. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Radio Telescope / Spectrometer / FFT / FPGA / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 114, no. 428, RECONF2014-55, pp. 67-72, Jan. 2015. |
Paper # |
RECONF2014-55 |
Date of Issue |
2015-01-22 (VLD, CPSY, RECONF) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
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VLD2014-122 CPSY2014-131 RECONF2014-55 |
Conference Information |
Committee |
RECONF CPSY VLD IPSJ-SLDM |
Conference Date |
2015-01-29 - 2015-01-30 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Hiyoshi Campus, Keio University |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
FPGA Applications, etc |
Paper Information |
Registration To |
RECONF |
Conference Code |
2015-01-RECONF-CPSY-VLD-SLDM |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
An AWF Digital Spectrometer for a Radio Telescope |
Sub Title (in English) |
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Keyword(1) |
Radio Telescope |
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Spectrometer |
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FFT |
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FPGA |
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1st Author's Name |
Hiroki Nakahara |
1st Author's Affiliation |
Ehime University (Ehime Univ.) |
2nd Author's Name |
Hiroyuki Nakanishi |
2nd Author's Affiliation |
Kagoshima University (Kagoshima Univ.) |
3rd Author's Name |
Kazumasa Iwai |
3rd Author's Affiliation |
National Astronomical Observatory of Japan (NAOJ) |
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Speaker |
Author-1 |
Date Time |
2015-01-29 15:05:00 |
Presentation Time |
20 minutes |
Registration for |
RECONF |
Paper # |
VLD2014-122, CPSY2014-131, RECONF2014-55 |
Volume (vol) |
vol.114 |
Number (no) |
no.426(VLD), no.427(CPSY), no.428(RECONF) |
Page |
pp.67-72 |
#Pages |
6 |
Date of Issue |
2015-01-22 (VLD, CPSY, RECONF) |
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