Cooperative laser positioning method and system based on orthogonal grating background interference resistance

The invention provides a cooperative laser positioning method and system based on orthogonal grating background interference resistance, and the method comprises the steps: processing cooperative laser, non-cooperative laser and sunlight, obtaining diffraction spots in an X direction and a Y direction, which correspond to the cooperative laser, the non-cooperative laser and the sunlight respectively, the diffraction spots in the X direction and the Y direction are focused and imaged respectively and then converted into image digital signals; processing and calculating the image digital signals to obtain forms and position relations of diffraction spots in the X direction and the Y direction respectively corresponding to the cooperative laser, the non-cooperative laser and the sunlight, and distinguishing the cooperative laser, the non-cooperative laser and the sunlight according to the forms and position relations of the diffraction spots. And cooperative laser positioning is realized. The cooperative laser c