Volume 34 Issue 03
Mar.  2008
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Zheng Zheng, Li Ning. Diversity detection algorithms in laser communications[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(03): 280-284. (in Chinese)
Citation: Zheng Zheng, Li Ning. Diversity detection algorithms in laser communications[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(03): 280-284. (in Chinese)

Diversity detection algorithms in laser communications

  • Received Date: 29 Jun 2007
  • Publish Date: 31 Mar 2008
  • The likelihood ratio function in symbol-by-symbol maximum likelihood detection was calculated with the Monte Carlo method for the atmosphere laser communication systems under the weak turbulence condition. Discrete points were mass-generated according to the marginal distribution for the turbulence-induced fading. Then the accuracy of estimating the diversity performance with a relatively less number of discrete points was discussed. A practical diversity detection algorithm was presented based on an algorithm similar to the likelihood ratio function-s structure and the training sequence. This algorithm was designed to operate without any knowledge of turbulence-induced fading channel in advance. The training sequence introduced in each frame can provide the atmosphere turbulence-fading channel information for the following information sequence-s detection. Simulations were taken, and the results show the validity of this newly introduced algorithm even when strong correlation exists.

     

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