Communication method, optical receiving apparatus, optical transmitting apparatus, and communication system

Abstract

A communication method in a communication system including an optical transmission device and an optical reception device includes: detecting wave-front distortions of a reference optical signal used for wave-front observation which arrives at a first time point and a second time point before a compensation start time point at which compensation for wave-front distortion is performed, by a plurality of sensors; estimating spatial phase distributions of a plurality of atmospheric layers between the optical transmission device and the optical reception device, respectively, at the first time point and the second time point, based on the wave-front distortions detected by the plurality of sensors, respectively; predicting the respective spatial phase distributions of the plurality of atmospheric layers at the compensation start time point by using estimation results of the respective spatial phase distributions of the plurality of atmospheric layers estimated at the first time point and the second time point; controlling, based on the predicted results, an operation performed by a wave-front control device that compensates for a wave-front distortion of an optical signal; and receiving the wave-front distortion of the optical signal transmitted from the optical transmission device after the wave-front control device compensates for the wave-front distortion.