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Loredana Arienzo

Tutor didattico

Dipartimento di Ingegneria dell'Energia Elettrica e dell'Informazione "Guglielmo Marconi"

Dipartimento di Informatica - Scienza e Ingegneria


ARIENZO L. (2019). "Green RF/FSO Communications in Cognitive Relay-based Space Information Networks for Maritime Surveillance" IEEE Transactions on Cognitive Communications and Networking, Vol. 5, No. 4, December 2019, p. 1182-1193.

This paper proposes a cognitive relay-based architecture for the satellite communication through a spectrum sensing operating on both free-space optical and radio frequency bands. The low timing jitter and the high directivity of the optical beam allows high data rate. On the other hand, various unpredictable environmental factors like clouds, snow, fog and rain cause strong attenuation of the optical power. The author proves that the hybrid radio-optical communication enhances the link availability as well as the data transmission. Especially, it increases the throughput and the real-time reception capacity and reduces the network energy consumption.
Previous works have shown that a Gamma distribution models the spectrum sensing energy for RF signals. The author extends the energy model to FSO signals and for including the Gamma-Gamma fading and the strong attenuation. Further, the author derives the formula of the minimum network energy consumption in presence of multipath fading and considering both amplify-and-forward and decode-and-forward data relay schemes.
The performance evaluation shows that the novel architecture enhances the coverage, the throughput and the real-time reception capacity of the existing maritime surveillance systems reducing the network energy consumption by jointly optimizing communication functionalities.

Pubblicato il: 01 marzo 2020