| 一种改进的GNSS整周模糊度解相关算法 |
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| 引用本文： | 姚彦鑫,赵昀,刘亮.一种改进的GNSS整周模糊度解相关算法[J].宇航学报,2013,34(11):1490-1495. |
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| 作者姓名： | 姚彦鑫 赵昀 刘亮 |
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| 作者单位： | 1. 北京信息科技大学 信息与通信工程学院，北京 100101；
2. 北京航空航天大学 电子信息工程学院，北京 100191 |
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| 基金项目： | 国家自然科学基金资助项目（61101075, 61271197，61302073）、北京信息科技大学学校科研基金（1325007）、市教委“PXM2013_014224_000058 教育教学-本科生科研训练项目”、北京信息科技大学2013年大学生科技创新计划项目经费 |
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| 摘 要： | GNSS整周模糊度解相关算法的性能直接影响到整周模糊度的搜索速度和解算成功率。为了在不降低GNSS整周模糊度解相关算法解相关程度的前提下，提高解相关算法的计算效率，在深入分析典型解相关方法优缺点的基础上，提出基于对角线预排算的解相关算法。该方法源于对直接对角线排序解相关算法的预排序思想，采用矩阵分解后对角线元素中最小值并将其转换到对应对角线位置的方式，用更少的迭代次数达到比直接对角线排序更好的解相关效果。将新算法与其他算法进行仿真比较得出，其性能优于直接对角线排序算法，解相关功能与联合解相关算法等效，且计算效率略占优势。
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| 关 键 词： | 全球卫星导航系统 载波相对定位 模糊度解相关 联合解相关算法 排序 |
| 收稿时间： | 2012-08-12 |
An Improved GNSS Integer Ambiguity Decorrelation Algorithm |
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| YAO Yan xin,ZHAO Yun,LIU Liang.An Improved GNSS Integer Ambiguity Decorrelation Algorithm[J].Journal of Astronautics,2013,34(11):1490-1495. |
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| Authors: | YAO Yan xin ZHAO Yun LIU Liang |
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| Affiliation: | 1. School of Information and Communication Engineering, Beijing Information Science and Technology University, Beijing 100101，China；
2. School of Electronic and Information Engineering，Beihang University，Beijing 100191，China |
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| Abstract: | The performance of GNSS integer ambiguity decorrelation algorithm directly influences ambiguity search speed and solution success rate. For improving the computational efficiency of the ambiguity decorrelation method under the premise that the ambiguity decorrelation degree is not reduced, an integer ambiguity decorrelation algorithm based on precomputing and ordering diagonal elements is proposed, to improve the direct ordering decorrelation algorithm. The new algorithm finds the minimum diagonal element after matrix to be decomposed and transforms it into a corresponding position to achieve a better decorrelation function with smaller iterative times relatively to direct ordering decorrelation algorithm. Compared with other classic decorrelation methods, simulations show that the new algorithm performs better than the direct ordering algorithm，and that the method is equivalent to the united ambiguity decorrelation method in decorrelation function and excels it in computational efficiency. |
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| Keywords: | GNSS(Global Navigation Satellite System) Carrier relative positioning Integer ambiguity decorrelation United ambiguity decorrelation Sequencing |
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