【摘要】 干涉图的相位噪声是相干性和视数的函数。因此,一个好的干涉图滤波器应同时考虑相干性和视数的影响。本文对在干涉图滤波中广泛应用的Goldstein滤波器进行改进,通过视数的引入,对滤波器的滤波参数进行修正,大大增强了滤波的自适应性。模拟数据和真实数据的验证说明新的滤波器在滤波效果上有明显的改善,具有更好的稳健性。更多还原

【Abstract】 Phase noise in a radar interferogram is the function of the interferometric coherence and the multilook number of the interferogram.Therefore an optimal radar interferogram filter should incorporate the information on both the interferometric coherence and the multilook number.This paper presents a modification to the commonly used Goldstein filter by suggesting an improved determination of the filtering parameter,which incorporate the influence of interferometric look number additionally.This way will greatly enhance the adaptability of the filter.Experimental results with both the simulated data sets and the real ones show that the new filter can work quite well and very robust when it is applied to filter radar interferograms.更多还原