Journal of Systems Engineering and Electronics ›› 2010, Vol. 21 ›› Issue (1): 41-46.doi: 10.3969/j.issn.1004-4132.2010.01.008

• DEFENCE ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

Rotational parameters estimation of maneuvering target in ISAR imaging

Wenchen Li1,2,∗, Jin Liu2, Xuesong Wang2, Shunping Xiao2, and Guoyu Wang2   

  1. 1. 63880 Unit, PLA, Luoyang 471003, P. R. China;
    2. School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, P. R. China
  • Online:2010-02-26 Published:2010-01-03
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (60875019).


The rotational parameters estimation of maneuvering target is the key of cross-range scaling of ISAR (inverse synthetic aperture radar), which can be used in the target feature extraction. The cross-range signal model of rotating target with fixed acceleration is presented and the weighted linear least squares estimation of rotational parameters with fixed velocity or acceleration is proposed via the relationship of cross-range FM (frequency modulation) parameter, scatterers coordinates and rotational parameters. The FM parameter is calculated via RWT (Radon-Wigner transform). The ISAR imaging and cross-range scaling based on scaled RWT imaging method are implemented after obtaining rotational parameters. The rotational parameters estimation and cross-range scaling are validated by the ISAR processing of experimental radar data, and the method presents good application foreground to the ISAR imaging and scaling of maneuvering target.