Airborne Ka FMCW MiSAR system and real data processing

摘要

Frequency Modulated Continuous Wave (FMCW) Synthetic Aperture Radar (SAR) system is gaining more and more attention for earth observation with characteristics of compact size, light weight and low cost. A Ka FMCW miniature SAR system, called MiSAR, is given in this paper, which could be applied to the unmanned aerial vehicle (UAV) observation aero. We have taken the flight test. The real data has been processed based on the modified RD algorithm. Moreover, the motion compensation and PGA technology are used to improve the image quality. The feasibility of the Ka FMCW MiSAR system and the reliability of the imaging algorithm are all verified. On the other hand, the GMTI processing result is also presented based on the DPCA technology. The result proves the Ka FMCW MiSAR system's GMTI ability.