中文

Journal of Applied Sciences ›› 2011, Vol. 29 ›› Issue (1): 22-26.doi: 10.3969/j.issn.0255-8297.2011.01.004

• Communication Engineering • Previous Articles     Next Articles

Effect of Atmospheric Turbulence on Maximal Zenith Angle of Satellite-to-Ground Laser Communication Links

LI Yong-liang1, WANG Jian-yu1;2, XU Rui1, LIN Ri-zhao1, FU Zhong-qian1   

  1. 1. Department of Electronic Science and Technology, University of Science and Technology of China,Hefei 230027, China
    2. Chinese Academy of Sciences, Shanghai Institute of Technical Physics, Shanghai 200083, China
  • Received:2010-10-12 Revised:2010-12-04 Online:2011-01-26 Published:2011-01-25

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Abstract:

Abstract: A concept of "maximal zenith angle" is proposed for satellite-to-ground laser communication links. A method for building the maximal zenith angle model is presented. We consider links using on-off-keying (OOK) modulation and avalanche photodiode detector (APD). Relationship among the maximal zenith angel, the nominal value of atmosphere turbulent intensity, and the bit error rate (BER) is obtained. This is done based on gamma-gamma (GG) probability density function (PDF), Web-Gaussian approximation of APD, and the Hufnagel-Valley model of the atmosphere turbulent intensity. With the laser signal power set at 2W, the simulation results show that the maximal zenith angel is clearly decreased with the nominal value
of atmosphere turbulent intensity, and increased with BER. A empirical model of maximal zenith angel is obtained using nonlinear curve fitting.

Key words:  laser communication, atmospheric turbulence, maximal zenith angle, bit error rate, empirical model

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