Quadrature demodulation techniqueused in laser Doppler velocimetry

19 March 1998

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 34 (6) , 547-549
https://doi.org/10.1049/el:19980389

Abstract

The authors present a technique for applying quadrature demodulation to determine the frequency of Doppler signals. This technique enables low-frequency signals with less than one signal period to be measured. The dependence of measurement error on signal-to-noise-ratio and measurement time is also investigated.

Keywords

LOW-FREQUENCY SIGNAL
MEASUREMENT ERROR
SIGNAL-TO-NOISE RATIO
LASER DOPPLER VELOCIMETRY
MEASUREMENT TIME
QUADRATURE DEMODULATION

This publication has 3 references indexed in Scilit:

Interferenzphase in der Laser-Doppler- Velocimetrie
TM - Technisches Messen, 1997
Method for analysis of the fundamental measuring uncertainty of laser Doppler velocimeters
Optics Letters, 1996
Algorithms for instantaneous frequency estimation: a comparative study
Published by SPIE-Intl Soc Optical Eng ,1990