Channel Estimation for Deep-Fading CO-OFDM LEO Satellite-to-Ground Optical Links Using Low-Rank Matrix Completion

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Low-Rank Matrix Completion techniques improve channel estimation for CO-OFDM LEO satellite-to-ground links undergoing deep fading. By accounting for the non-stationary nature of atmospheric turbulence and varying propagation geometry, this method ensures more reliable signal recovery than conventional linear estimators. This advancement is critical to maximizing link availability and data capacity during short satellite visibility windows.