Research on Micro-Doppler Feature of Spatial Target

Inverse Synthetic aperture radar (ISAR) is widely used to observe the space moving target, on which the motion of spin, vibration and rotation will introduce the micro-Doppler (m-D) effect, and results in the smear imaging. When the space target has a micro-Doppler effect, it will produce frequency modulation for the radar echo and cause serious interference. In this paper, the micro-spin model is constructed, and the echo of micro-spin scattering is processed respectively by the time-frequency analysis. A new method of eliminating the micro-Doppler effect is proposed to improve the ISAR imaging. By the experiments and performance analysis, the validity of the proposed algorithm is demonstrated.