Abstract：A 3-D inverse synthetic aperture radar imaging method based on stepped-frequency waveforms for high speed spinning targets is proposed in this paper, aiming at the signal with narrow-bandwidth. Assuming the motion compensation is completed, single-range matching filtering is performed in certain sub-pulse firstly to obtain ISAR image. Then parameters of scatters are estimated using CLEAN technique. ISAR images are obtained in different sub-pulse and different range bin. At last range synthetic profile processing is performed to get high resolution in range and the 3-D image is obtained. This method can void the Doppler influence of spinning targets on range synthetic and improve the resolution effectively. Simulations of multiple scatters validate the feasibility and superiority of the approach.
2010, Vol. 32 
