Performance of PPM on terrestrial FSO links with turbulence and pointing errors

Authors:
Wilfried Gappmair;Steve Hranilovic;Erich Leitgeb
Affiliations:
Institute of Communication Networks and Satellite Communications, Graz University of Technology, Austria;Department of Electrical and Computer Engineering, McMaster University, Hamilton, Ontario, Canada;Institute of Broadband Communications, Graz University of Technology, Austria
Venue:
IEEE Communications Letters
Year:
2010

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Abstract

In recent work, the error performance of on-off keying has been investigated for free-space optical (FSO) links impaired by both turbulence and pointing loss. In the current letter, the analytical framework is extended to M-ary pulseposition modulation (PPM), providing exact results for M = 2. Since the approach is not directly applicable to PPM signals with M 2, a closed-form approximation of the average symbol error probability is derived for this case, which is shown via simulation to be tight over a wide SNR range of interest.