Adaptive Doppler centroid estimation algorithm of airborne SAR

IEICE Electronics Express

Chang Liu¹  Jian Yang¹  Yanfei Wang¹ 

[1] Institute of Electronics, Chinese Academy of Sciences

关键词: Doppler centroid estimation;    energy balancing method;    Gaussian curve fitting;    synthetic aperture radar (SAR);   

DOI  :  10.1587/elex.9.1135

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(9)Successfully imaging of airborne SAR requires that Doppler centroid frequency be accurately estimated. Energy balancing method is a classical method to solve this problem, whereas its performance relies heavily on the homogeneity of the scene. In this paper, the spectra of prominent point targets are analyzed, and then an adaptive algorithm based on Gaussian curve fitting is proposed to eliminate the impact of prominent point targets in the scene. Random estimation error is further eliminated by using linear fitting of estimations from each range cell. The results of simulations and the imaging of raw data prove the veracity of this algorithm.

【 授权许可】

Unknown