Three-Dimensional Micro-Motion Parameters Extraction of Nutation Cone Based on Monostatic Radar

The 3-D micro-motion parameters reflect the target’s structure and motion information, providing important recognition features. The nutation cone is one of the typical targets in antimissiles. The extraction of 3-D micro-motion parameters for nutation cones is of great significance. The existing methods, however, cannot extract the 3-D micro-motion parameters of nutation targets based on monostatic radar. In order to solve this problem, an extraction method of 3-D micro-motion parameters is proposed based on monostatic radar. First, a new nutation observation model is proposed, and the frequency shift equations of cone top and cone bottom echoes are analyzed. The analytical solutions for micro-motion parameters are derived from the coefficients of the frequency shift equations. Based on analytical solutions, 3-D micro-motion parameters are extracted. The effectiveness of the algorithm is validated through measured data.