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International Journal of Antennas and Propagation
Volume 2015 (2015), Article ID 852520, 7 pages
Research Article

Joint Multichannel Motion Compensation Method for MIMO SAR 3D Imaging

Key Laboratory for Radar Signal Processing, Xidian University, Xi’an 710071, China

Received 26 January 2014; Revised 28 April 2014; Accepted 5 June 2014

Academic Editor: Wen-Qin Wang

Copyright © 2015 Ze-min Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The multiple-input-multiple-output (MIMO) synthetic aperture radar (SAR) system with a linear antenna array can obtain 3D resolution. In practice, it suffers from both the translational motion errors and the rotational motion errors. Conventional single-channel motion compensation methods could be used to compensate the motion errors channel by channel. However, this method might not be accurate enough for all the channels. What is more, the single-channel compensation may break the coherence among channels, which would cause defocusing and false targets. In this paper, both the translational motion errors and the rotational motion errors are discussed, and a joint multichannel motion compensation method is proposed for MIMO SAR 3D imaging. It is demonstrated through simulations that the proposed method exceeds the conventional methods in accuracy. And the final MIMO SAR 3D imaging simulation confirms the validity of the proposed algorithm.