Frequency estimation of laser signals with time-varying amplitude from phase measurements

Author

Galtier, Frédéric ; Besson, Olivier

Author_Institution

Dept. of Avionics & Syst., ENSICA, Toulouse, France

Volume

5

fYear

1997

fDate

21-24 Apr 1997

Firstpage

4005

Abstract

This paper addresses the problem of estimating particle´s velocity in the vicinity of an aircraft by means of a laser velocimeter. A model for the signal generated by a particle of air passing through a probe volume consisting of equidistant bright and dark fringes is given. From this model, a frequency estimator based on the phase of the correlation sequence of the signal is proposed. A theoretical analysis of the frequency estimator is presented. In particular, a formula for the variance of the estimate is derived under the assumption of small estimation errors. Numerical examples confirm the validity of the analysis. Finally, the effectiveness of the proposed algorithm is demonstrated on real data

Keywords

aircraft; error analysis; frequency estimation; laser velocimetry; optical correlation; optical information processing; phase measurement; aircraft; algorithm; bright fringes; correlation sequence; dark fringes; frequency estimation; laser signals; laser velocimeter; particle velocity estimation; phase measurements; probe volume; real data; signal generation; small estimation errors; time-varying amplitude; Additive white noise; Aerospace electronics; Aircraft; Estimation error; Frequency estimation; Frequency measurement; Phase estimation; Phase measurement; Probes; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on

Conference_Location

Munich

ISSN

1520-6149

Print_ISBN

0-8186-7919-0

Type

conf

DOI

10.1109/ICASSP.1997.604816

Filename

604816