Translational Motion Compensation and Micro-Doppler Feature Extraction of Space Spinning Targets

In order to compensate the translational motion and extract micro-Doppler (m-D) feature of space spinning targets, a novel method based on delayed–conjugated multiplication and m-D compensation is put forward. The translational acceleration is estimated by the delayed–conjugated multiplication processing. A set of m-D basis signals are generated by discretizing the m-D parameter domain. Thus after acceleration compensation processing, the echo is compensated by the m-D basis signals. Furthermore, the m-D feature and residual velocity can be achieved by searching the maximum spectral peak. The high-precision m-D feature extraction with lower computation complexity is achieved by using the proposed method. Finally, the effectiveness of the proposed method is validated by simulations.