Journal of Xidian University ›› 2021, Vol. 48 ›› Issue (2): 99-108.doi: 10.19665/j.issn1001-2400.2021.02.013

• Special Issue: Advances in Radar Technology • Previous Articles     Next Articles

Ultra-high resolution imaging method for the distributed small satellite MIMO-SAR

YANG Jun1,2(),ZHOU Fang1,2()   

  1. 1. School of Computer and Information,Hefei University of Technology,Hefei 230009,China
    2. Anhui Province Key Laboratory of Industry Safety and Emergency Technology,Hefei 230601,China
  • Received:2020-09-27 Revised:2021-03-01 Online:2021-04-20 Published:2021-04-28
  • Contact: Fang ZHOU;


Aiming at the spotlight mode of the distributed small satellite multiple-input multiple-output synthetic aperture radar(MIMO-SAR),an ultra-high resolution imaging method is proposed to reduce the storage pressure and imaging load of the satellite in a multi-channel high-resolution mode.The full-aperture signal of each channel is divided into sub-aperture signals.The sub-aperture signal is deblurred,and then the large bandwidth signal is obtained by using the improved time domain bandwidth synthesis method.Then the sub-aperture image coherent fusion algorithm is used to obtain the ultra-high resolution image.Simulation results show that the improved time domain bandwidth synthesis method can synthesize bandwidth effectively,and the imaging effect of the proposed method is excellent.The validity and reliability of the method are verified.

Key words: synthetic aperture radar, small satellite, multiple input multiple output, spotlight, sub-aperture

CLC Number: 

  • TN957