Optimal Multiple FSO Transceiver Configuration for Using on High-Altitude Platforms

Free-space optical (FSO) communication requires light of sight (LoS) between the transmitter and the receiver. For long-distance communication, many research projects have been conducted towards using a network composed of high-altitude platforms (HAPs) flying at an elevation of 20 km to carry inter...

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Bibliographic Details
Published in:IEEE access 2023, Vol.11, p.47053-47069
Main Authors: Truong, Dieu Linh, Dang, The Ngoc
Format: Article
Language:English
Subjects:
Apertures
beam size optimization
Closed-form solutions
Configurations
Costs
Energy costs
Free space optics
Free-space optical communication
Ground stations
HAP based FSO network
High altitude
high-altitude platform
Maintenance costs
Optical fiber communication
Optical receivers
Optical transmitters
Platforms
Research projects
Telescopes
Transceivers
Wavelength division multiplexing
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Summary:Free-space optical (FSO) communication requires light of sight (LoS) between the transmitter and the receiver. For long-distance communication, many research projects have been conducted towards using a network composed of high-altitude platforms (HAPs) flying at an elevation of 20 km to carry intermediate FSO transceivers that forward data between ground stations. The clear environment at high elevations prevents terrestrial obstacles from cutting the LoS between the transceivers. An FSO transceiver on a HAP can communicate with ground stations within a small area owing to its limited beam size. We suggest using multiple FSO transceivers on a HAP to extend its ground coverage. However, the use of too many FSO transceivers may quickly exhaust the onboard energy of the HAP. As a result, HAP must be lowered to recharge frequently. In this study, we first propose a configuration of multiple FSO transceivers to widen the ground coverage of a HAP. We then propose a set of closed-form expressions to calculate the extended coverage. Finally, to implement a HAP network using multiple FSO transceivers, we seek the optimal configuration of multiple FSO transceivers that minimizes the total cost of the HAP network, including amortization, energy, and maintenance costs. The simulation results show that the proposed multiple FSO transceiver configuration can increase four times the ground coverage area of a HAP and significantly reduces the cost of the HAP network.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2023.3274605