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1 July 1990 Atmospheric turbulence effects on the performance of multigigabit downlink PPM laser communications
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Abstract
Atmospheric turbulence effects on multigigabit/s data rate, pulse-position modulation (PPM) laser downlinks are examined for M = 4 or less using laser transmitter power of 100 mW to 1 W. From the impulse response curves, it is shown that the pulse spreading can be about 5 ps for strong turbulence and about 0.05 ps for weak turbulence. Thus in clear air turbulence without clouds and fog, the contribution from the stretching of a short pulse of 50 ps width will be negligible in both strong and weak turbulence. The high-data rate communication system performance is analyzed in terms of a BER using a thermalized equation derived here. It is concluded that, for the weak turbulence case, the required laser transmitter power to achieve a BER of 10 to the -8th is about 700 mW of power. For the strong turbulence case, a peak laser transmitter power of 1 kW is required to achieve a BER of 10 to the -5th.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Arun K. Majumdar and William C. Brown "Atmospheric turbulence effects on the performance of multigigabit downlink PPM laser communications", Proc. SPIE 1218, Free-Space Laser Communication Technologies II, (1 July 1990); https://doi.org/10.1117/12.18217
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