Atmospheric turbulence effects on the performance of multigigabit downlink PPM laser communications

摘要: Atmospheric turbulence effects on multigigabit/s data rate, pulse-position modulation (PPM) laser downlinks are examined for M = 4 or less using transmitter power of 100 mW to 1 W. From the impulse response curves, it is shown that pulse spreading can be about 5 ps strong and 0.05 weak turbulence. Thus in clear air without clouds fog, contribution from stretching a short 50 width will negligible both The high-data rate communication system performance analyzed terms BER thermalized equation derived here. It concluded that, case, required achieve 10 -8th 700 power. For peak kW -5th.