Micromotion Parameters Estimation of Precession Cone Based on Monostatic Radars

The micro-Doppler (m-D) effect of radar targets reflects the target motion attribute, which can provide important information for target recognition. Based on the m-D effect, the estimation of micromotion parameters of the cone is of great significance in the field of antimissile. However, the existing methods based on monostatic radar can only extract some micromotion parameters, and the research on m-D properties is not in-depth enough. In this article, the m-D properties of the precession cone with fins are studied. First, the motion model of the precession cone with fins is given. Subsequently, the frequency shift equation of the fin is studied, and a set of equations containing the relationship between the micromotion parameters is constructed. The micromotion parameters (precession angle, bottom radius, angle between the coning vector and the radar line of sight, etc.) are estimated by solving the set of equations. The effectiveness of the algorithm is verified by simulated data and measured data.