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Proceedings Paper

Signal processing strategy for ALADIN
Author(s): Juergen Streicher
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Paper Abstract

The atmospheric laser Doppler instrument ALADIN will provide information about the wind velocity using the motion of small particles and the resulting Doppler shift between the transmitted and received laser frequency. The accuracy of the frequency estimation depends mainly on the signal-to-noise ratio (SNR) of the received signal. An improvement of the signal quality i.e. SNR can be done by reducing the bandwidth and by averaging over some shots. The bandwidth reduction can be performed either analogue or digital. The analogue technique includes a lot of risks and error sources, the digital demodulation and filtering shows only one critical component, the analogue to digital converter. The shot averaging can also be performed by two different techniques: coherent or incoherent accumulation. Both, the bandwidth reduction as well as the averaging techniques are presented.

Paper Details

Date Published: 15 December 1995
PDF: 4 pages
Proc. SPIE 2581, Lidar Techniques for Remote Sensing II, (15 December 1995); doi: 10.1117/12.228512
Show Author Affiliations
Juergen Streicher, DLR (Germany)

Published in SPIE Proceedings Vol. 2581:
Lidar Techniques for Remote Sensing II
Christian Werner, Editor(s)

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