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Atmospheric turbulence causes severe degradation in the performance of free space optical (FSO) communication links. Among the various techniques used to mitigate the effect of turbulence, aperture averaging is one of the simplest. We experimentally investigate the effect of aperture averaging on the performance of FSO communication links for different intensity modulation (IM) schemes namely on-off...
The atmosphere affects the ground-to-satellite optical link characteristics. In Free Space Optical (FSO) communication it is important to minimize these atmospheric effects, so that efficient communication can take place. In this research paper different modulation schemes as such Pulse Position Modulation (PPM), Differential Pulse Position Modulation (DPPM) and Differential Amplitude Pulse Position...
This paper gives a detailed overview of the inter-satellite links used in free space optical (FSO) communication. FSO communication uses laser technology to send and receive data. For the modulation of message signal, OOK and 8-PPM schemes are used. As energy in the inter-satellite link is a major constraint, OOK and M-PPM provide better options than others since they have to remain ON for the transmission...
The performance of ground to satellite Free Space Optical (FSO) communication link is degraded due to the presence of atmospheric turbulence that causes fluctuations in both intensity and phase of the received optical signal. In this paper, bit error rate (BER) performance of FSO link using transmit diversity is investigated for coherent (sub-carrier BPSK and sub-carrier QPSK) and non-coherent (OOK...
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