Classification of free rigid targets with micro-motions using inertial characteristic from radar signatures

The potential of an object´s inertial characteristic is studied for the purpose of classification of free rigid targets in radar. Through the estimation of micro-motion parameters from micro-Doppler signals, the inertial characteristic can be further obtained. It is an intrinsic property of the targets themselves, and essentially independent of their diverse micro-motion states. Then a simple Bayesian classifier is adopted to make the target discrimination. Numerical results and analysis finally show that the inertia-based feature performs better than classic time-frequency and micro-dynamic characteristics in the classification application.