Abstract:

Multi-ballistic targets resolution is significant for ballistic missile early warning and recognition. At present, the study on the micro-motion ballistic missile is confined in the assumption of “a single target with multi-scattering centers” and “multi-targets with a single scattering center”. To solve this problem, microDoppler of precessing missile and swinging decoy are firstly derived. And it proves that the micro-Doppler with the same target and different scattering centers has the same cycle. Then radon transform is applied to compensate the translation. After analyzing cyclostationarity of multi-targets time-frequency plane, we regard multi-ballistic targets resolution as a problem to resolve a signal composed of several two-dimensional first-order cyclostationary (FOCS). A method based on the two-dimensional FOCS is proposed to resolve multi-targets. Finally, simulations are given to validate the effectiveness and the robustness in high noise environment of this method.