Method and system for determining an angle of arrival of a radioelectric signal

Method and system for determining an angle of arrival of a radioelectric signal The invention relates to a method for determining an angle of arrival of a received radioelectric signal implemented by a receiving antenna system including either one rotating antenna having at least two receiving channels, or two rotating antennas with a same speed each having a receiving channel, and having different antenna diagrams. The method includes, in the operational phase (22), the following steps: -calculating and storing (36) a series of ambiguous angle error measurement values obtained from receiving amplitude values of a radioelectric signal coming from an emitting source on said first and second receiving channels, each angle error measurement value being representative of a ratio between receiving amplitude values on said first and second receiving channels, and corresponding to an angular deviation relative to a reference angular value; -calculating (38) a convolution function on said angular range tween said series of ambiguous angle error measurement values and a series of theoretical angle error measurement values of said receiving channels previously calculated and stored, -determining (38) an angle of arrival of said received radioelectric signal as a function of an estimate of a maximum of said calculated convolution function. Figure 5