摘要
SAR（SyntheticApertureRadar）成像的关键之一在于多卜勒参数的估计，即多卜勒质心fdc和多卜勒频率变化率fdr的估计，以前，这两者的估计都是基于频域．本文将自适应滤波中计算自适应加权因子的最小功率准则加以推广，将其用于估计fdc和fdr，从而从时域上来估计该参数，该方法比频域法所需计算量小、精度高、实时性强。计算机模拟的结果验证了该方法的有效性．
One of the keys of SAR(Synthetic Aperture Radar)imaging lays in the estimation of doppler parameters,i,e, the estimation of doppler centriod Fdc and doppler ratio Fdr. Formerly, the estimation of this two parameters is based on frequency-domain. In this paper, the criteria of minium power which was used in adaptive filter is used to estimate Fde and Fdr.therefore, these parameters are estimated in time-domain. Compared with the method in frequency-domain, the method has the advantages of less calculation load, high accuracy.The results of simulation verified the accurate of this metbod.
出处
《信号处理》
CSCD
北大核心
1995年第1期26-30,14,共6页
Journal of Signal Processing
