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Proceedings Paper

Adaptive decision thresholding in optical wireless communication systems over turbulence channels
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Paper Abstract

A model for received signals has been developed for detection of binary data bits in the presence of atmospheric turbulence noise. The model was used to analyze the likelihood ratio test (LRT) according to optimal maximum a posterior (MAP) probability criterion. The adaptive decision thresholding method was developed to maintain the detection threshold near optimum. The detection threshold that was updated adaptively as the signal-to-noise ratio (SNR) was changed. Kalman filter and homomorphic filter were used to predict statistical variable of the bit and turbulence parameters, respectively. Simulation and the experimental results indicate that bit-error probability (BEP) performance of the system is greatly improved by an order of magnitude or more.

Paper Details

Date Published: 19 November 2007
PDF: 7 pages
Proc. SPIE 6783, Optical Transmission, Switching, and Subsystems V, 67833V (19 November 2007); doi: 10.1117/12.743776
Show Author Affiliations
Jin Wang, Huazhong Univ. of Science and Technology (China)
Dexiu Huang, Huazhong Univ. of Science and Technology (China)
Xiuhua Yuan, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 6783:
Optical Transmission, Switching, and Subsystems V
Dominique Chiaroni; Wanyi Gu; Ken-ichi Kitayama; Chang-Soo Park, Editor(s)

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