Title :
Detection and channel estimation for optical communication over atmospheric turbulent channels
Author_Institution :
Dept. of Aerosp. Eng., Univer sity of Maryland, College Park, MD, USA
Abstract :
Atmospheric turbulence impairs the performance of free-space optical links by perturbing optical power at the receiving terminal. The resulting reduction in the link performance can be partially compensated if the strength of the optical fade (channel state) is known to the receiver. For an atmospheric optical channel with on-off keying modulation, the optimal estimator of the channel state is determined and a nonlinear filtering scheme is developed to efficiently compute the estimation. In addition, the optimal method of incorporating this estimation in reconstruction of the receiving message is presented.
Keywords :
atmospheric turbulence; channel estimation; nonlinear filters; optical links; optical receivers; signal detection; atmospheric turbulent channels; channel detection; channel state optimal estimator; free-space optical links; nonlinear filtering scheme; optical communication; optical power perturbation; optical receiver; receiving terminal; Approximation methods; Equations; Nonlinear optics; Optical receivers; Optical refraction; Optical sensors; Optical variables control;
Conference_Titel :
Information Sciences and Systems (CISS), 2011 45th Annual Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-9846-8
Electronic_ISBN :
978-1-4244-9847-5
DOI :
10.1109/CISS.2011.5766124
