正交小波基在SAR的多普勒参数求取中的应用

Application of Orthogonal Wavelets Bases in Solving the Doppler Parameters of SAR

在合成孔径雷达技术中 ,对于多普勒参数的估计 ,即多普勒质心 fdc 和多普勒频率变化率fdr 的估计是非常重要的。提出了一种采用频谱支集紧小波基的计算信号瞬时参数的快速局部算法 ,且这种方法有良好的抗噪能力 ,在求取多普勒质心和多普勒频率变化率中取得了较为满意的效果。

The estimation of Doppler parameters (Doppler frequency center and Doppler frequency variation rate) is very important in the synthetic aperture radar (SAR) technique. In this paper, a new fast local algorithm based on orthogonal bases of compactly supported wavelets in frequency domain is proposed to compute the signal transient parameters. The method has great capability in removing noise. The results of Doppler frequency center and Doppler frequency variation rate obtained by this method are satisfied.