Robust <tex>$\mathcal{H}_{\infty}$</tex> Pointing Error Control of Free Space Optical Communication Systems

Abstract

This paper proposes a robust H∞ approach for free space optical (FSO) beam pointing error systems. First, a deterministic discrete-time model for pointing error loss due to misalignment is presented. This model considers detector aperture size and optical beam width. Then, the control problem that guarantees the stability of the closed-loop pointing error and the attenuation of the disturbance is investigated through a robust H∞ control framework. Finally, simulation results of the FSO link under the effects of a controlled weak turbulence condition are performed to demonstrate the feasibility of the proposed robust pointing error approach.

Kalman Filter Design for Intermittent Optical Wireless Communication Systems on Time Scales

“…This setup not only saves energy but also ensures a more secure communication link. However, it is apparent that the LOS configuration depends on the precise alignment between the optical signal transmitter and the optical sensing receiver, which is even more challenging to achieve for slightly longer distance communication links [3]. Researchers have proposed some solutions to this problem, including H ∞ pointing error control [4], extremum seeking control [5], etc., in an attempt to solve the alignment problem of OWC systems.…”