Processing laser Doppler signal with a digital filter
| Autor: | Xinyi Wu, Chao Jun Gao, Li Ding |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Frequency response
Digital down converter Computer science Acoustics Low-pass filter Band-stop filter Chebyshev filter law.invention Analogue filter symbols.namesake law Digital signal Physics::Atomic Physics Anti-aliasing filter Half-band filter business.industry Matched filter Filter (signal processing) Laser Doppler velocimetry Laser Filter design Digital delay line symbols High-pass filter Telecommunications business Doppler effect Laser Doppler vibrometer Digital filter Root-raised-cosine filter |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.318181 |
| Popis: | We can use laser Doppler effect to measure velocity. But the volume of laser Doppler signal is small and the signal-to- noise is small. If we use an analog filter to precess laser Doppler signal. It is difficult to change the frequency response of the analog filter. So it is difficult to get a good signal. In this paper, we use a digital filter to process laser Doppler signal. When we measure the velocity, we can get the laser Doppler signal volume by an analogy- digital converter. We can process the signal by a Chebyshev digital filter and save the signal in RAM. The digital filter's frequency response can be changed easy until we get a good Doppler signal. In this paper, we show how to design the chebyshev digital filter and how to use the filter to process the laser Doppler signal. |
| Databáze: | OpenAIRE |
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