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Pairwise codeword error probability for coded free-space optical communication through atmospheric turbulence channels

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2 Author(s)
Xiaoming Zhu ; Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA ; Kahn, J.M.

In free-space optical communication links using intensity modulation/direct detection (IM/DD), atmospheric turbulence can cause signal fading. Error-control codes can help to mitigate this fading and improve system performance. To study the performance of various coding schemes, we derive an upper bound on the pairwise codeword error probability for transmission through channels with correlated turbulence-induced fading. Computing this probability involves complicated multidimensional integration. To simplify the computations, we derive an approximate upper bound under the assumption of weak turbulence. The accuracy of this approximation under weak turbulence is verified by numerical simulation. Its invalidity when applied to strong turbulence is also shown. This simple approximate upper bound to the pairwise codeword error will be useful in the study of coding for free-space optical communication through weak atmospheric turbulence channels

Published in:

Communications, 2001. ICC 2001. IEEE International Conference on  (Volume:1 )

Date of Conference:

11-14 Jun 2001