Experimental investigation of segmented adaptive optics for spatial laser array in an atmospheric turbulence condition

2011 ◽  
Vol 284 (20) ◽  
pp. 4975-4982 ◽  
Author(s):  
Yi Zheng ◽  
Xiaohua Wang ◽  
Li Deng ◽  
Feng Shen ◽  
Xinyang Li
Keyword(s):  
Experimental Investigation ◽  
Atmospheric Turbulence ◽  
Adaptive Optics ◽  
Laser Array ◽  
Turbulence Condition

A New Closed Form Approximation for BER for Optical Wireless Systems in Weak Atmospheric Turbulence

2018 ◽  
Vol 39 (2) ◽  
pp. 247-253 ◽  
Author(s):  
Rahul Kaushik ◽  
Vineet Khandelwal ◽  
R. C. Jain
Keyword(s):  
Normal Distribution ◽  
Closed Form ◽  
Atmospheric Turbulence ◽  
Weak Turbulence ◽  
Optical Wireless ◽  
Gauss Hermite Quadrature ◽  
Turbulence Condition ◽  
Log Normal ◽  
Log Normal Distribution ◽  
Closed Form Approximation

AbstractWeak atmospheric turbulence condition in an optical wireless communication (OWC) is captured by log-normal distribution. The analytical evaluation of average bit error rate (BER) of an OWC system under weak turbulence is intractable as it involves the statistical averaging of Gaussian Q-function over log-normal distribution. In this paper, a simple closed form approximation for BER of OWC system under weak turbulence is given. Computation of BER for various modulation schemes is carried out using proposed expression. The results obtained using proposed expression compare favorably with those obtained using Gauss-Hermite quadrature approximation and Monte Carlo Simulations.

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