Study of geometric method for angle-of-arrival distribution according to phase fluctuation

The phase fluctuation of the beam propagating through the atmospheric turbulence,can induce the angle-of-arrival fluctuation on the receiver plane.In order to find the relation between them on a certain spot,based on the known phase distribution on the receiver plane,the wavefront geometric shape was constructed to calculate the angle-of-arrival distribution.The feasibility of the method was analyzed and the calculated variance by the geometric method was compared with the theoretic value.The results show that the calculated variance accords with the statistics of the angle-of-arrival well.The obtained results are useful for the study of the configuration and statistics characteristics of the beam propagating through the atmospheric turbulence.