Method for identifying subcarrier modulation constellation diagram of wireless optical communication under atmospheric turbulence

The invention discloses a method for identifying the subcarrier modulation constellation diagram of wireless optical communication under atmospheric turbulence. The method comprises the following steps that: an atmospheric turbulence channel mathematical model is established; the constellation diagram of subcarrier modulation signals which have passes through an atmospheric turbulence channel is obtained according to the atmospheric turbulence channel mathematical model, fuzzy C-means clustering is performed, and the hard trend mean feature parameter of cluster centers is extracted; and an improved three-layer BP neural network classifier is designed, the feature parameter is adopted to train the improved BP network, and the trained network is adopted to identify the constellation diagram.The method for identifying the subcarrier modulation constellation diagram of the wireless optical communication under the atmospheric turbulence of the present invention has the advantages of simpletechnical routes, economi