| Presentation | 2015-01-29 An AWF Digital Spectrometer for a Radio Telescope Hiroki NAKAHARA, Hiroyuki NAKANISHI, Kazumasa IWAI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
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| Paper # | VLD2014-122,CPSY2014-131,RECONF2014-55 |
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| Conference Information | |
| Committee | RECONF |
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| Conference Date | 2015/1/22(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Registration To | Reconfigurable Systems (RECONF) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An AWF Digital Spectrometer for a Radio Telescope |
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| 1st Author's Name | Hiroki NAKAHARA |
| 1st Author's Affiliation | Faculty of Engineering, Kagoshima University() |
| 2nd Author's Name | Hiroyuki NAKANISHI |
| 2nd Author's Affiliation | Faculty of Science, Kagoshima University |
| 3rd Author's Name | Kazumasa IWAI |
| 3rd Author's Affiliation | Nobeyama Radio Observatory, NAOJ |
| Date | 2015-01-29 |
| Paper # | VLD2014-122,CPSY2014-131,RECONF2014-55 |
| Volume (vol) | vol.114 |
| Number (no) | 428 |
| Page | pp.pp.- |
| #Pages | 6 |
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