J4 ›› 2013, Vol. 40 ›› Issue (4): 21-28.

• Original Articles • Previous Articles     Next Articles

Frequency scaling algorithm for high squint FMCW-SAR imaging

LI Dong;LIAO Guisheng;YANG Zhiwei;XU Qing   

  1.  (National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an  710071, China)
  • Received:2012-05-05 Online:2013-08-20 Published:2013-10-10
  • Contact: LI Dong E-mail:lidongcuit@126.com

Abstract:

For the invalidation of the present frequency scaling algorithm in the case of the high squint angle, a modified frequency scaling algorithm for high squint Frequency Modulated Continuous Wave Synthesis Aperture Radar imaging is presented. Based on the new Residual Video Phase (RVP), this algorithm can solve the problem of range frequency aliasing on the high squint mode effectively by considering the effect of the variation of the squint angle on the range bandwidth. Hence, high quality imaging can be obtained in the case of the high squint mode with the frequency scaling algorithm. Finally, performance analyses and simulation results demonstrate the effectiveness of the proposed algorithm.

Key words: synthesis aperture radar, frequency modulated continuous wave, frequency scaling, high squint sar imaging, residual video phase

CLC Number: 

  • TN957.52