Title :
Coherent optical receiver for PPM signals under atmospheric turbulence
Author :
Fernández, Michela Muñoz ; Vilnrotter, Victor A.
Author_Institution :
California Inst. of Technol., Pasadena, CA
Abstract :
Adaptive combining of experimentally obtained heterodyned pulse position modulated (PPM) signals with pulse-to-pulse coherence in the presence of simulated spatial distortions resembling atmospheric turbulence, is demonstrated. The adaptively combined PPM signals are phased up via an LMS algorithm suitably optimized to operate with PPM in the presence of additive shot-noise. A convergence analysis of the algorithm is presented, and results with both, computer simulated and experimentally obtained PPM signals are analyzed
Keywords :
atmospheric turbulence; least mean squares methods; optical receivers; pulse position modulation; shot noise; LMS algorithm; PPM signals; additive shot-noise; atmospheric turbulence; optical receiver; pulse position modulated signals; pulse-to-pulse coherence; spatial distortions; Algorithm design and analysis; Atmospheric modeling; Computational modeling; Convergence; Least squares approximation; Optical distortion; Optical pulses; Optical receivers; Pulse modulation; Signal analysis;
Conference_Titel :
Aerospace Conference, 2005 IEEE
Conference_Location :
Big Sky, MT
Print_ISBN :
0-7803-8870-4
DOI :
10.1109/AERO.2005.1559452
