Hybrid RF-FSO System Cascaded with UWOC Link
Sanya Anees1, Smriti Rekha Baruah2, Pallab Sarma3

1Sanya Anees, Department of Electronics and Communication Engineering, Indian Institute of Information Technology Guwahati, Assam, India.
2Smriti Rekha Baruah, Department of Electronics and Communication Engineering, Indian Institute of Information Technology Guwahati, Assam, India.
3Pallab Sarmah, Department of Electronics and Communication Engineering, Indian Institute of Information Technology Guwahati, Assam, India.

Manuscript received on 02 July 2019 | Revised Manuscript received on 09 July 2019 | Manuscript published on 30 August 2019 | PP: 2065-2069 | Volume-8 Issue-10, August 2019 | Retrieval Number: J93300881019/2019©BEIESP | DOI: 10.35940/ijitee.J9330.0881019
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: This work presents outage analysis of a hybrid communication system, where radio frequency (RF) and free space optical (FSO) communication links transmit in parallel to the then cascaded underwater wireless optical communication (UWOC) link forming a RF/FSO-UWOC cooperative system. Optical wireless communication (OWC) is being used as a viable communication technology by researchers due to its advantages such as fast speed, cost effectiveness, and highly secure transmission. The proposed architecture connects the terrestrial and the underwater regions to form an end-to-end cooperative system. This hybrid RF/FSO back-haul link makes the system more reliable as the optical link is highly susceptible to weather conditions. The channel models considered are Nakagami-m distributed fading, Double Generalized Gamma (DGG) distributed atmospheric turbulence along with Rayleigh distributed misalignment losses and mixture of Exponential Generalized Gamma (EGG) distributed oceanic turbulence for RF, FSO, and UWOC links, respectively. Results show that outage performance is severely affected due to RF fading, DGG distributed irradiance, air bubble concentration, temperature gradient, and saltiness of water source.
Keywords: Terms-Double Generalized Gamma, Decode-and-forward, free space optical, optical wireless communication, radio-frequency, Nakagami-m distribution, underwater optical communication.
Scope of the Article: Wireless Communication