Micro-motion targets resolution in a high noise environment

Multi-target resolution is a major challenge when there are numbers of targets in the same range cell. Micro-motion, such as vibration/rotation of an object or structures on the object, offers a new method to resolute targets. The paper proposes a novel method to implement the multiple targets resolution based on the micro-Doppler(mD) induced by micro-motions on targets in a high noise environment. In this paper, the concept of multi-target micro-Doppler(MMD) in general conditions is introduced. An effective time-frequency B-Distribution(BD) is applied to extract the mD features and the Viterbi algorithm for instantaneous frequency estimation is used to enhance the mD features in a high noise environment. Simulation results based on synthetic data confirm the method.