一种改进的GPS模糊度白化滤波算法

在深入分析白化滤波去相关算法的基础上,对白化滤波算法进行了改进,以改善GPS模糊度解算中的去相关效果.在改进算法中,对模糊度协方筹矩阵的元素进行排序处理,以保证矩阵分解的有效性,改善去相关效果,提高模糊度离散搜索效率和质量.数值模拟结果表明,该算法不受维数限制,对低维和高维都能成功解算,具有较强的适用性和良好的去相关效果,能提高动态模糊度解算的效率.

Modified GPS Ambiguity White-Filtering Algorithm

In order to improve the decorrelation of GPS (global positioning system) ambiguity, the white-filtering decorrelation algorithm was modified on the basis of analyzing the existing white-filtering decorrelation algorithms. In this modified algorithm, sequencing of elements in the ambiguity covariance matrix is appended based on a white-filtering process to ensure the validity of matrix transform and improve the effect of decorrelation and the quality of ambiguity space searching. The numerical simulation indicates that the modified algorithm can be used succsessfully to the calculation of any dimension data, has a good applicability and decorrelation and can improve the efficiency of kinematic ambiguity resolution.