基于PM算法的涡旋电磁波引信超分辨测向方法

To improve the azimuth detection accuracy of air defense missile radio fuze at low signal-to-noise ratio (SNR) background, a super-resolution method of azimuth detection for electromagnetic vortex wave fuze based on propagator method (PM) is proposed. Vortex electromagnetic waves with different orbital angular momentum modes are sequentially emitted to irradiate the target by a phase-controlled uniform circular array, and the target echo mathematical model is derived based on the multiple-input single-output (MISO) model. The received signal matrix is constructed through the approximate deformation of the echo equation. Then, PM is used to construct the spatial spectrum function, and spectral peak searching is performed to estimate the target azimuth. The effectiveness of the proposed method is verified by simulation. Results show that the proposed method can accurately detect the azimuth of a target in the case of low SNR and few elements.