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提出了一种基于局域斜平面地形模型的联合子空间投影方法来估计陡峭地形的INSAR干涉相位.该方法能够充分利用相应像素对及其相邻像素对的相干信息,并且利用包含干涉相位的信号子空间的所有基矢量向噪声子空间投影来估计干涉相位,该方法具有自适应图像配准和降低相位噪声功能,因而可以在SAR图像配准精度很差(可以允许达到一个分辨单元)的条件下准确地估计相应像素间的干涉相位.实测数据及仿真数据的处理结果证明了此方法的有效性.
A joint subspace projection method based on local oblique plane terrain model is proposed to estimate the INSAR interferometric phase of steep terrain.This method can make full use of the coherent information of the corresponding pixel pair and its neighboring pixel pairs and make use of the information of the interferometric phase All the base vectors of the signal subspace are projected to the noise subspace to estimate the interference phase. This method has the function of adaptive image registration and phase noise reduction, so that the SAR image registration accuracy can be poor (which can allow a resolution unit to be reached) The phase of interference between the corresponding pixels is estimated accurately.The processing results of the measured data and simulation data prove the effectiveness of this method.