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

fYear

2007

fDate

3-5 Oct. 2007

Firstpage

1

Lastpage

6

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/WISP.2007.4447618

Filename

4447618