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13 June 2005 Accuracy analysis of major signal processing techniques in laser Doppler velocimetry
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The random and bias errors of estimating Doppler frequency from zero counting technique and correlation technique based on correlation function zeros analysis are compared with the accuracy of conventional spectral analysis and ultimate accuracy given by Cramer-Rao lower bound. It is shown that spectral 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.
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Ivan A. Popov "Accuracy analysis of major signal processing techniques in laser Doppler velocimetry", Proc. SPIE 5856, Optical Measurement Systems for Industrial Inspection IV, (13 June 2005);

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