doi:

DOI: 10.3724/SP.J.1300.2013.20073

Journal of Radars (雷达学报) 2013/2:2 PP.203-209

Data-based Parameter Estimation Method for Circular-scanning SAR Imaging


Abstract:
The circular-scanning Synthetic Aperture Radar (SAR) is a novel working mode, and its image quality is closely related to the accuracy of the imaging parameters, particularly considering the inaccuracy of the real speed of motion. According to the characteristics of the circular-scanning mode, a novel data-based method for estimating the velocities of the radar platform and the scanning-angle of the radar antenna is proposed in this paper. By referring to the basic concept of the Doppler navigation technique, we first improve the mathematic model and formulations for the parameter estimation. The optimal parameter approximation based on the least square criterion is then realized for solving the equations derived from the data processing. The simulation results verify the validity of the proposed scheme.

Key words:Synthetic Aperture Radar (SAR),Circular-scanning mode,Parameters estimation,Least-square approximation

ReleaseDate:2014-07-21 16:58:32



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