Interferometric synthetic aperture radar phase filtering and two-dimensional phase unwrapping research
|School||Xi'an University of Electronic Science and Technology|
|Course||Signal and Information Processing|
|Keywords||Interferometric Synthetic Aperture Radar Phase Noise Filtering Phase unwrapping|
Interferometric synthetic aperture radar (InSAR) is a synthetic aperture radar , based on the ground to high-resolution , high-precision three-dimensional mapping is an important remote sensing technology, the military , the national economic construction and scientific research and other fields have widely used by domestic and foreign attention. This paper describes the history of the development and application of InSAR overview Youyi spaceborne InSAR single antenna pair sail the system as an example , analyzes the altimeter principles and summarizes the basic flow of InSAR signal processing . Then the phase noise filtering and phase unwrapping these two key technologies in-depth research, the phase noise filtering mean filter and rotary rotary median filtering principle , and to propose new weighted mean filter rotation method, which utilizes reflecting the quality of the pseudo phase correlation coefficient as a new weighting coefficient weighting coefficient than the original easier access , thereby simplifying the method of weighted average filter rotation . Followed by a discussion of the principles of phase unwrapping , the existing phase unwrapping algorithms have been classified , the classical branch truncation method , quality map oriented method, least squares algorithm ideas and compare the advantages and disadvantages are analyzed , and the branch truncation method and quality of the map -oriented method is proposed based on the idea of a new phase unwrapping algorithm - integrated phase unwrapping method, which takes advantage of residual points and quality diagrams, interferometric phase will be launched into low-quality high-quality regional and regional , and then were cut method using a branch -oriented method and high quality production and low quality area for phase commenced two methods to overcome their disadvantages , thus improving the overall quality of the phase unwrapping .