方向控制的最小二乘相位解缠方法研究

项目名称： 方向控制的最小二乘相位解缠方法研究

项目编号： No.41274007

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 刘国林

作者单位： 山东科技大学

项目金额： 70万元

中文摘要： 相位解缠作为InSAR数据处理的关键和热点研究问题，多年来一直是研究的重点。项目在分析国内外研究成果基础上，以申请者等研究提出的非线性最小二乘和方向控制最小二乘理论为基础，以提高信噪比低、地形复杂地区的相位解缠质量和较大区域相位解缠的运算速度为目标，开展方向控制的最小二乘相位解缠方法研究，其选题具有创新性，具有重要的理论意义和应用价值。 项目从理论研究、算法设计、实验分析、结果验证等方面系统深入地研究方向控制最小二乘相位解缠的关键理论与方法，重点研究：针对相位解缠模型的权重确定问题，突破兼顾地形、噪声等影响的权重确定方法，克服误差传递；针对相位解缠的非线性以及迭代收敛速度慢等问题，提出方向控制的最小二乘和附加地形、噪声等约束的方向控制最小二乘相位解缠方法，提高相位解缠的非线性处理能力、收敛速度和精度；设计最优数值算法，增强算法的稳定性和强健性；开展实验数据的验证对比分析等。

中文关键词： 方向控制最小二乘；非线性最小二乘；合成孔径雷达干涉；相位解缠；病态

英文摘要： As the key and hot spots in the InSAR data processing, phase unwrapping has been the focus of the study. On the basis of analyzing the research in domestic and international of phase unwrapping, the theory of nonlinear least squares and directional control least squares is put forward by applicant and others. In order to improve the quality of phase unwrapping in the areas where the signal to noise ratio is low and complex terrain and enhance the operation speed of phase unwrapping in larger regions, the topic of carrying out the study of the least squares phase unwrapping method based on directional control is innovative and has important theoretical significance and application value. The key theories and methods of the least squares phase unwrapping based on the directional control are studied in system and in-depth from theoretical studies, algorithm design, experimental analysis and results validation. The focus is as follows. According to the problem of weights determined on phase unwrapping model, the new weights method is determined by breaking through effects of the terrain and noise, overcoming the error propagation. In connection with the problem that non-linear and iteration convergence is slow in the phase unwrapping, the least squares phase unwrapping method based on directional control and directi

英文关键词： Direction Control Least Squares；Nonlinear Least Squares；Interferometric Synthetic Aperture Radar；Phase Unwrapping；Ill-conditioned