The bird aircraft strike hazard (BASH) is a worldwide problem to aviation, which deprives lots of properties and lives every year. Avian radar systems are necessary to be devel-oped for avian surveillance and early warning. In this paper, the frequency-stepped chirp signal radar is utilized to obtain high range resolution for micro-Doppler features extraction by means of synthetic bandwidth. The micro-Doppler features provide important information for avian detection and monitoring. The micro-Doppler effect in frequency-stepped chirp radar is analyzed in the paper and some micro-Doppler feature extraction methods are introduced.
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