Numerical and experimental demonstration of LQG-based predictive control for point-ahead angle turbulence mitigation in GEO feeder optical links

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This predictive control method uses Linear Quadratic Gaussian (LQG) algorithms to mitigate point-ahead angle turbulence in geostationary feeder links. By integrating phase and intensity data from wavefront sensors, it overcomes the limitations of anisoplanatism, which traditional feed-forward systems fail to correct. This approach significantly reduces signal fading and enhances the stability of high-speed laser communication links between satellites and ground stations.