Reduction of the beam pointing error for improved free-space optical communication link performance
Al-Alwan, Asem Ibrahim Alwan
Headary, Wael Ghazy
Ooi, Boon S.
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Computer, Electrical and Mathematical Sciences and Engineering Division (CEMSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
Electrical Engineering Program
Computational Bioscience Research Center (CBRC)
Embargo End Date2022-04-07
Permanent link to this recordhttp://hdl.handle.net/10754/667490
MetadataShow full item record
AbstractFree-space optical communication is emerging as a low-power, low-cost, and high data rate alternative to radio-frequency communication in short- to medium-range applications. However, it requires a close-to-line-of-sight link between the transmitter and the receiver. This paper proposes a robust H∞ control law for free-space optical (FSO) beam pointing error systems under controlled weak turbulence conditions. The objective is to maintain the transmitter–receiver line, which means the center of the optical beam as close as possible to the center of the receiving aperture within a prescribed disturbance attenuation level. First, we derive an augmented nonlinear discrete-time model for pointing error loss due to misalignment caused by weak atmospheric turbulence. We then investigate the H∞-norm optimization problem that guarantees the closed-loop pointing error is stable and ensures the prescribed weak disturbance attenuation. Furthermore, we evaluate the closed-loop outage probability error and bit error rate (BER) that quantify the free-space optical communication performance in fading channels. Finally, the paper concludes with a numerical simulation of the proposed approach to the FSO link’s error performance.
CitationN’Doye, I., Cai, W., Alalwan, A., Sun, X., Headary, W. G., Alouini, M.-S., … Laleg-Kirati, T.-M. (2021). Reduction of the beam pointing error for improved free-space optical communication link performance. IFAC Journal of Systems and Control, 16, 100154. doi:10.1016/j.ifacsc.2021.100154
SponsorsThis work has been supported by the King Abdullah University of Science and Technology (KAUST), Saudi Arabia, Base Research Fund (BAS/1/1627-01-01) to Taous Meriem Laleg and KAUST − King Fahd University of Petroleum and Minerals (KFUPM), Saudi Arabia, Special Initiative (KKI) Program, REP/1/2878-01-01.