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Proceedings Paper

Synchronization and detection of binary data in free-space optical communication systems using Haar wavelet transformation
Author(s): Nader Namazi; Ray Burris; Charles Conner; G. Charmaine Gilbreath; William Scharpf
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Paper Abstract

A new method is presented to perform the synchronization and detection of the binary data from the FSO signal. Based on the wavelet transformation, a new band-pass filter is developed and implemented. It is shown that the Haar wavelet is an excellent choice for this purpose. The center frequency of this filter is a function of the scale and could be adjusted to adapt to the variation of the channel. The output of the filter is zero-mean and is closely related to the derivative of the binary data. The filter has a linear phase; therefore, its output is used for synchronization and detection of the data. Analysis of the method is presented using Fourier transformation. In addition, simulation experiments are performed and presented using the real data. The results of the experiments indicate that the Haar wavelet transform is a robust and effective tool in dealing with FSO data.

Paper Details

Date Published: 20 October 2004
PDF: 13 pages
Proc. SPIE 5550, Free-Space Laser Communications IV, (20 October 2004); doi: 10.1117/12.561473
Show Author Affiliations
Nader Namazi, Catholic Univ. of America (United States)
Ray Burris, Research Support Instruments, Inc. (United States)
Charles Conner, Catholic Univ. of America (United States)
G. Charmaine Gilbreath, Naval Research Lab. (United States)
William Scharpf, Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 5550:
Free-Space Laser Communications IV
Jennifer C. Ricklin; David G. Voelz, Editor(s)

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