|
|
|
| An Algorithm Based on Spectrum Shift for Improving Range Resolution Using GEO Spaceborne/Airborne Multistatic SAR |
| Zheng Jing-bo①② Song Hong-jun① Shang Xiu-qin①② Wu Yong①② |
①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
②(Graduate University of Chinese Academy of Sciences, Beijing 100039, China) |
|
|
|
|
Abstract In this paper, the GEO spaceborne/airborne multistatic SAR geometry model with one fixed transmitter and multiple receivers is proposed, and the spectrum shift between different receiver echoes is derived. Based on the spectrum shift, a new algorithm for improving range resolution of this model by composing spectrums of different receivers is proposed. The overlapped interference term, which is induced during spectrum composing, and its influence on range resolution, is analyzed in detail, and a method by weight filtering is provided to remove the interference term. Finally, simulation is employed to test validity of the algorithm.
|
|
Received: 27 August 2009
|
|
|
|
Corresponding Authors:
Zheng Jing-bo
E-mail: zhengjingbo06@mails.gucas.ac.cn
|
|
|
|
|
|
|
2010, Vol. 32 
