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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 13,
  • Issue 5,
  • pp. 051001-051001
  • (2015)

Performance analysis of space-shift keying over negative-exponential and log-normal FSO channels

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Abstract

The average bit-error rate (ABER) performance of free-space optical (FSO) communication links is investigated for space-shift keying (SSK) over log-normal and negative-exponential atmospheric turbulence channels. SSK is compared with repetition codes and a single-input single-output system using multiple pulse amplitude modulations. Simulation results show that the signal-to-noise ratio gain of SSK largely increases with greater spectral efficiencies and/or higher turbulence effects. A tight bound for ABER is derived based on an exact moment generation function (MGF) for negative-exponential channel and an approximate MGF for log-normal channel. Finally, extensive Monte Carlo simulations are run to validate the analytical analysis.

© 2015 Chinese Laser Press

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