Real-time estimator of laser doppler anemometer signal parameters based on Kalman filtering

  • Authors:
  • T. Gaudo;B. Rais

  • Affiliations:
  • Office National Études et de Recherches Aérospatiales, The French Aerospace Lab, Palaiseau, France;Institut Superieur de l'Aéronautique et de l''space, Toulouse, France

  • Venue:
  • DSP'09 Proceedings of the 16th international conference on Digital Signal Processing
  • Year:
  • 2009

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Abstract

In order to develop a cheap and reliable way of measuring an aircraft's speed, the French aerospace laboratory, ONERA, has designed a new Laser Doppler Anemometer (LDA) based on coherent detection [10]. A laser beam is generated in the vicinity of the aircraft. An aerosol particle passing through the laser volume scatters light according to its velocity. Back-scattered signal consists of a Gaussian shaped time-varying amplitude modulated by a sinusoidal signal. Its envelope and its phase carry the speed information. Because of speed requirements signal processing, a simple real-time estimator, based on Kalman filtering, is proposed in this study.