摘要
提出一种新的多基线干涉SAR相位估计方法。该方法选取适当的基线组合,用最大似然估计器提取每一复像元(随基线变化的)频率,在展开最短基线干涉相位基础上,最终获得长基线干涉相位估计值。该方法简单有效,且不需要进行大量的迭代运算,甚至当最短基线较短时,不需要进行干涉相位展开。仿真数据处理结果验证本文方法的有效性。
A new phase estimate algorithm for multi-baseline interferometry is proposed.It consists of two steps： firstly,selects the appropriate set of baselines and unwraps the interferogram associated with the shortest baseline;then gains the unwrapped phase of the longest baseline by using the maximum likelihood estimator to extract the frequency of any complex pixel.The proposed method is simple and effective,and error propagation effect of this technique is very small.The method does not require plenty of iterative operation,even the step of phase unwrapping will be omitted when the shortest baseline is short enough.Simulation data processing results validate the effectiveness of proposed method.
出处
《测绘学报》
EI
CSCD
北大核心
2012年第1期93-99,共7页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金(60802065)
桂林电子科技大学科研启动基金(UF11015Y)
关键词
多基线
相位展开
最大似然估计
multi-baseline
phase unwrapping
maximum likelihood estimation
