| 一种改进的GNSS高维模糊度快速降相关算法 |
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| 引用本文： | 鲁铁定,汪鑫,鲁春阳.一种改进的GNSS高维模糊度快速降相关算法[J].大地测量与地球动力学,2021,41(5):511-515. |
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| 作者姓名： | 鲁铁定 汪鑫 鲁春阳 |
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| 作者单位： | 东华理工大学测绘工程学院,南昌市广兰大道418号,330013;东华理工大学测绘工程学院,南昌市广兰大道418号,330013;福州市勘测院,福州市高新大道1号,350108;河南城建学院测绘与城市空间信息学院,河南省平顶山市龙翔大道,467036 |
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| 摘 要： | 为了提高GNSS高维模糊度的解算效率，提出一种改进的GNSS模糊度快速降相关算法。算法采用对称旋转排序策略和延后降相关策略对下三角Cholesky分解的整数高斯变换算法进行改进。通过模拟和实测数据进行验证，结果表明，改进算法在一定程度上减少了降相关过程中的条件方差交换次数和整数高斯变换次数，从而有效提高了解算效率，增强了解算时间的稳定性。
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| 关 键 词： | 模糊度解算 快速降相关 对称旋转排序 延后降相关 |
An Improved GNSS High-Dimensional Ambiguity Fast Decorrelation Algorithm |
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| LU Tieding,WANG Xin,LU Chunyang.An Improved GNSS High-Dimensional Ambiguity Fast Decorrelation Algorithm[J].Journal of Geodesy and Geodynamics,2021,41(5):511-515. |
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| Authors: | LU Tieding WANG Xin LU Chunyang |
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| Abstract: | In order to improve the efficiency of GNSS high-dimensional ambiguity resolution, this paper proposes an improved GNSS ambiguity fast decorrelation algorithm. The algorithm adopts a symmetric rotation sorting strategy and a delayed decorrelation strategy to improve the integer Gaussian transform algorithm of the lower triangular Cholesky decomposition. Verification through simulations and measured data experiments shows that the improved algorithm reduces the number of conditional variance exchanges and integer Gaussian transformations in the decorrelation process to a certain extent, thereby effectively improving the efficiency of the original algorithm and enhancing the stability of the calculation time. |
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| Keywords: | ambiguity resolution fast decorrelation symmetric rotation sorting delayed decorrelation |
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