Title :
Countering Atmospheric Turbulence in Free Space Optical Links Using Wavelet Based Signal Processing
Author :
Babu, P.L. ; Srinivasan, Balaji
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Chennai
Abstract :
The turbulent atmospheric channel causes fluctuations in both intensity and phase of the transmitted optical signal, which degrades the performance of free space optical links. In this paper, we demonstrate the use of wavelets to correct the signal distortion due to turbulence. The demonstration also includes a simple information recovery technique using a differentiator and a two threshold decision device. The results are quantified by calculating the average bit error rate ratio (ABERR), which shows that the BER is improved by several orders of magnitude under strong turbulence conditions.
Keywords :
atmospheric turbulence; distortion; error statistics; optical links; signal processing; telecommunication channels; average bit error rate ratio; differentiator; free space optical links; information recovery; signal distortion; threshold decision device; turbulent atmospheric channel; wavelet based signal processing; Adaptive optics; Apertures; Atmospheric waves; Fluctuations; Optical distortion; Optical fiber communication; Optical receivers; Optical refraction; Optical signal processing; Space technology;
Conference_Titel :
Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE
Conference_Location :
New Orleans, LO
Print_ISBN :
978-1-4244-2324-8
DOI :
10.1109/GLOCOM.2008.ECP.535
