CAJ | 학술논문

针对多频干涉合成孔径雷达(InSAR)干涉信号不同频率分量的相位融合问题，提出基于加权相关信号子空间方法(CSSM)的多频相位融合方法。该融合方法采用联合像素模型构建信号模型；对 CSSM构造聚焦矩阵的思想进行改进，通过对各频率分量对应的协方差矩阵进行加权聚焦应对不同频率分量的信噪比差异；并采用联合子空间投影方法估计干涉相位。仿真数据和 SIR-C雷达实际数据验证表明，该方法能够有效改善多频 InSAR的干涉相位估计性能。
침대다빈간섭합성공경뢰체(InSAR)간섭신호불동빈솔분량적상위융합문제，제출기우가권상관신호자공간방법(CSSM)적다빈상위융합방법。해융합방법채용연합상소모형구건신호모형；대 CSSM구조취초구진적사상진행개진，통과대각빈솔분량대응적협방차구진진행가권취초응대불동빈솔분량적신조비차이；병채용연합자공간투영방법고계간섭상위。방진수거화 SIR-C뢰체실제수거험증표명，해방법능구유효개선다빈 InSAR적간섭상위고계성능。
In order to solve the problem of interferometric phase fusion for multi-frequence In SAR system under different frequency bands,a new phase fusion method based on weighted coherent signal subspace method (CSSM)was proposed in this paper.In the method,the joint pixel model was formulated;focusing matrix for CSSM was employed and improved;covariance matrices of different frequency bins were weighted firstly before which was transformed into a general covariance matrix at focusing frequency to improve the performance under different frequency bands signal-noise-ratio;after that,the interferometric phase was estimated by using sub-space proj ecting method.Simulated data and SIR-C real data processing results showed that the method could improve the performance of interferometric phase fusion effectively.