Journal of Astronautics ›› 2012, Vol. 33 ›› Issue (2): 222-227.doi: 10.3873/j.issn.1000-1328.2012.02.011

• E&IE • Previous Articles     Next Articles

Imaging Study on Bi-Static ISAR Based on Frequency Modulation Continuous Wave

ZHU Ren-fei1, ZHU Xiao-peng1, ZHANG Qun1,2   

  1. 1.Inst. of Telecommunication Engineering, AFEU, Xi’an 710077, China;
    2.Key Laboratory of Wave Scattering and Remote Sensing Information (Ministry of Education), Fudan University, Shanghai 200433, China
  • Received:2011-01-22 Revised:2011-04-25 Online:2012-02-15 Published:2012-02-21

Abstract: A method is proposed for solving the problem when using Frequency Modulation Continuous Wave(FMCW) in Bi-static ISAR system. Considering coupling terms induced by using FMCW signal, the Discrete Polynomial Phase Transform(DPT) is used to estimate the combined component, then the phases of echo signal are compensated by using compensation functions to eliminate the fixed frequency offset caused by first coupling term and main-lobe expansion induced by second coupling term. The Range Doppler algorithm is used to attain clear target’s image. At last, the validity of the proposed compensation algorithm is validated by simulation and focused image is obtained.

Key words: Inverse synthetic aperture radar(ISAR), Bi-static radar, Frequency modulation continuous wave(FMCW), Discrete polynomial phase transform(DPT)