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Proceedings Paper

Processing laser Doppler signal with a digital filter
Author(s): Li Ding; Chao Jun Gao; Xinyi Wu
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Paper Abstract

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.

Paper Details

Date Published: 13 August 1998
PDF: 3 pages
Proc. SPIE 3555, Optical and Fiber Optic Sensor Systems, (13 August 1998); doi: 10.1117/12.318181
Show Author Affiliations
Li Ding, Zhengzhou Institute of Technology (China)
Chao Jun Gao, Zhengzhou Institute of Technology (China)
Xinyi Wu, Zhengzhou Automation Institute (China)

Published in SPIE Proceedings Vol. 3555:
Optical and Fiber Optic Sensor Systems
Shanglian Huang; Kim D. Bennett; David A. Jackson, Editor(s)

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