Journal of Systems Engineering and Electronics ›› 2013, Vol. 24 ›› Issue (3): 410-.doi: 10.1109/JSEE.2013.00049

• DEFENCE ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

Phase synchronization processing method for alternating bistatic mode in distributed SAR

Zhihua He1,*, Feng He1, Junli Chen2, Haifeng Huang1, and Diannong Liang1   

  1. 1. School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;
    2. Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200230, China
  • Online:2013-06-25 Published:2010-01-03


In the distributed synthetic aperture radar (SAR), the alternating bistatic mode can perform phase reference without a synchronization link between two satellites compared with the pulsed alternate synchronization method. The key of the phase synchronization processing is to extract the oscillator phase differences from the bistatic echoes. A signal model of phase synchronization in the alternating bistatic mode is presented. The phase synchronization processing method is then studied. To reduce the phase errors introduced by SAR imaging, a sub-aperture processing method is proposed. To generalize the sub-aperture processing method, an echo-domain processing method using correlation of bistatic echoes is proposed. Finally, the residual phase errors of the both proposed processing methods are analyzed. Simulation experiments validate the proposed phase synchronization processing method and its phase error analysis results.