| Presentation | 2001/5/21 RASS SIGNAL PROCESSING USING FREQUENCY SHIFT IN TIME DOMAIN Toshio Wakayama, Tetsuo Kirimoto, Takahiko Fujisaka, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Radio Acoustic Sounding System (RASS) is a kind of atmospheric radars to measure a temperature profile. Acoustic wavefronts generated by speekers propagate at the speed of sound, and this speed, proportional to square root of temperature, is measured by a Doppler radar. Since the speed of sound is much higher' than usual wind velocities, a conventional system often uses COHO with frequency offset, and reduces apparent Doppler frequency of the sonic wavefront echo. However,performance is often degraded because a sonic wavefront echo is overlapped by ground clutter echoes and atmospheric turbulece echoes with Doppler ambiguities. In this paper, we propose a method to solve this aliasing problem with minimum increase of computation load. This method rejects aliasing echoes by a lowpass filter, downconverts frequencies of received data in time domain, and computes Doppler velocity by Fourier transform with small number of FFT points. The algorithm is verified by computer simulation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | atmospher radar / wind profiler / RASS / temperature / frequency shift / signal processing |
| Paper # | SANE2001-15 |
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| Conference Information | |
| Committee | SANE |
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| Conference Date | 2001/5/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Space, Aeronautical and Navigational Electronics (SANE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | RASS SIGNAL PROCESSING USING FREQUENCY SHIFT IN TIME DOMAIN |
| Sub Title (in English) | |
| Keyword(1) | atmospher radar |
| Keyword(2) | wind profiler |
| Keyword(3) | RASS |
| Keyword(4) | temperature |
| Keyword(5) | frequency shift |
| Keyword(6) | signal processing |
| 1st Author's Name | Toshio Wakayama |
| 1st Author's Affiliation | Information Technology R&D Center, Mitsubishi Electric Corporation() |
| 2nd Author's Name | Tetsuo Kirimoto |
| 2nd Author's Affiliation | Information Technology R&D Center, Mitsubishi Electric Corporation |
| 3rd Author's Name | Takahiko Fujisaka |
| 3rd Author's Affiliation | Information Technology R&D Center, Mitsubishi Electric Corporation |
| Date | 2001/5/21 |
| Paper # | SANE2001-15 |
| Volume (vol) | vol.101 |
| Number (no) | 96 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |