Journal of Systems Engineering and Electronics ›› 2013, Vol. 24 ›› Issue (6): 931-937.doi: 10.1109/JSEE.2013.00109

• DEFENCE ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

Hybrid micromotion-scattering center model for synthetic aperture radar micromotion target imaging

Yuliang Qin*, Bin Deng, Zonghui Huang, and Wuge Su   

  1. School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Online:2013-12-24 Published:2010-01-03


Micromotion is an important target feature, although the target micromotion has an unfavorable influence on the synthetic aperture radar (SAR) image interpretation due to defocusing. This paper introduces micromotion parameters into the scattering center model to obtain a hybrid micromotion-scattering center model, and then proposes an optimization algorithm based on the maximal likelihood estimation to solve the model for jointly obtaining target motion and scattering parameters. Initial value estimation methods using targets’ ghost images are then presented to guarantee the global and fast convergence. Simulation results show the effectiveness of the proposed algorithm especially in high precision estimation and multiple targets processing.