Yang J.,Yantai Naval Aeronautical and Astronautical University |
Yang J.,94638 Unit PLA |
Hou H.,91039 Unit PLA |
Qu C.,Yantai Naval Aeronautical and Astronautical University |
And 2 more authors.
Dianbo Kexue Xuebao/Chinese Journal of Radio Science | Year: 2012
Imaging defocusing may occur due to phase error induced by vibration of conformal antenna array fixed on wings of airborne array synthetic aperture radar (SAR). Micro-Doppler effect of airborne downward-looking array frequency modulated continuous wave (FMCW) SAR imaging is studied based on micro-Doppler model and time-frequency analysis method. Vibration model is established combined with array antenna vibration geometry model, and signal characteristic is analyzed. Then, imaging simulation and analysis of micro-Doppler effect are carried out based on time-frequency analysis method. Results indicate that the proposed method can realize accurate estimation of the antenna array vibration error. Copyright © 2012 by Editorial Department of Chinese Journal of Radio Science.