Comparative study of accuracy of major signal processing techniques in laser Doppler velocimetry

Ivan A. Popov

doi:10.1117/12.579604

22 June 2004 Comparative study of accuracy of major signal processing techniques in laser Doppler velocimetry

Ivan A. Popov

Proceedings Volume 5503, Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (2004) https://doi.org/10.1117/12.579604
Event: Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 2004, Ancona, Italy

Abstract

The random and bias errors of Doppler spectral shift measurements, correlation measurements and zero crossing techniques are discussed. It is shown that spectral shift measurement technique has advantage over other techniques in low signal-to-noise ratio region, whereas zero crossing technique based on analysis of probability density ensures lower random and bias errors at high enough SNR. The correlation technique has relatively low random error but shows considerable bias error in the region of low and moderate SNR when information about Doppler frequency is obtained from first zero of correlation function.

Citation Download Citation

Ivan A. Popov "Comparative study of accuracy of major signal processing techniques in laser Doppler velocimetry", Proc. SPIE 5503, Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 June 2004); https://doi.org/10.1117/12.579604

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