Title :
Digital Calibration Procedure for Laser Doppler Velocimetry in Acoustics
Author :
Duff, Alain Le ; Plantier, Guy ; Valière, Jean-Christophe ; Gazengel, Bruno
Author_Institution :
Ecole Superieure d´´Electron. de l´´Ouest, Angers
Abstract :
This paper propose a digital calibration procedure for errors compensation of the output signals of an analogical quadrature demodulation (QD) hardware. This kind of device is used for laser Doppler velocimetry (LDV) measurements in acoustics. The method developed is based on the use of a maximum likelihood estimator (MLE) in order to estimate the amplitudes, the tension offsets, and the phase shift of two quadrature signals. Such a technique provides a good and a simple way for QD calibration.
Keywords :
Doppler measurement; acoustic signal processing; calibration; error compensation; maximum likelihood estimation; quadrature amplitude modulation; acoustics; amplitude estimation; analogical quadrature demodulation; digital calibration; error compensation; laser Doppler velocimetry; maximum likelihood estimator; phase shift; quadrature signal; tension offset; Acoustic devices; Acoustic measurements; Amplitude estimation; Calibration; Demodulation; Error compensation; Hardware; Laser velocimetry; Maximum likelihood estimation; Phase estimation; Calibration procedure; Laser Doppler Velocimetry; Maximum Likelihood Estimator; Quadrature demodulation;
Conference_Titel :
Intelligent Signal Processing, 2007. WISP 2007. IEEE International Symposium on
Conference_Location :
Alcala de Henares
Print_ISBN :
978-1-4244-0830-6
Electronic_ISBN :
978-1-4244-0830-6
DOI :
10.1109/WISP.2007.4447618
