We investigate the performance of free-space optical communication systems in the presence of atmospheric turbulence with the purpose of assessing the advantages that a coherent communication system can bring with respect to a conventional intensity modulation/direct detection system. The perspective is an information theoretic one, hence we evaluate the mutual information and the corresponding outage probability of both channels, with traditional symbol constellations, as a pragmatic approximation to the capacity, or to the outage capacity, of those channels. In addition, we analyze non-uniform symbol constellations, in order to evaluate the possible shaping gain that can be achieved under different channel conditions.
Coherent vs IM/DD Transmissions for FSO Communications in the Presence of Atmospheric Turbulence / Colavolpe, G.; Foggi, T.; Matuz, B.; Vannucci, A.; Zahr, A.. - (2023), pp. 83-88. (Intervento presentato al convegno 28th European Wireless Conference, EW 2023 tenutosi a ita nel 2023).
Coherent vs IM/DD Transmissions for FSO Communications in the Presence of Atmospheric Turbulence
Colavolpe G.;Foggi T.;Vannucci A.;Zahr A.
2023-01-01
Abstract
We investigate the performance of free-space optical communication systems in the presence of atmospheric turbulence with the purpose of assessing the advantages that a coherent communication system can bring with respect to a conventional intensity modulation/direct detection system. The perspective is an information theoretic one, hence we evaluate the mutual information and the corresponding outage probability of both channels, with traditional symbol constellations, as a pragmatic approximation to the capacity, or to the outage capacity, of those channels. In addition, we analyze non-uniform symbol constellations, in order to evaluate the possible shaping gain that can be achieved under different channel conditions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
