Micromotion Parameter Extraction of Precession Cone Based on Analytical Solution in Monostatic Radar

The micro-Doppler (M-D) effect of radar targets reflects target motion, providing valuable information for recognition. Micromotion parameter extraction of cone targets based on the M-D effect is one of the research focuses in antimissile. However, the analytical solution of micromotion parameters has not been proposed in the existing M-D theory of the precession cone. This basic problem hinders improving the micromotion parameter extraction performance of the precession cone. To solve this problem, the analytical solution of micromotion parameters is derived. First, a scalar observation model for precession cone targets is proposed. Compared with the existing vector observation model, the complexity of the scalar observation model is greatly reduced. Then, based on the scalar observation model, the M-D properties of cones are explored and the analytical solutions for micromotion parameters are derived. The M-D frequency shift curve of the fin contains four frequency components, and the micromotion parameters can be extracted by substituting the amplitudes of the four frequency components into the analytical solution. Experiments with simulated data and measured data verify the effectiveness of the algorithm.