| 利用三频数据组合探测不敏感周跳 |
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| 引用本文： | 刘柳,吕志伟,戴琦,周朋进,贾铮洋.利用三频数据组合探测不敏感周跳[J].武汉大学学报(信息科学版),2019,44(3):392-397. |
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| 作者姓名： | 刘柳 吕志伟 戴琦 周朋进 贾铮洋 |
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| 作者单位： | 1.信息工程大学测绘学院, 河南 郑州, 450001 |
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| 基金项目： | 国家自然科学基金U1636219国家自然科学基金41604032国家重点研发计划2016YB0801303地理信息工程国家重点实验室开放研究基金SKLGIE2015-M-2-5 |
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| 摘 要： | 针对全球卫星导航系统（Global Navigation Satellite System，GNSS）信号中部分周跳难以探测的问题，在三维坐标系中分析了不敏感周跳的产生及分布，研究了探测阈值对不敏感周跳的影响，进而研究了多个组合量联合探测周跳的效果，提出了针对不敏感周跳的组合系数选取方法。该方法根据不敏感周跳的探测量构建组合系数的函数模型，在所有可能的三频无几何相位（geometry free combination，GF）组合系数中选取最敏感的组合系数，可探测3个频点上跳变量相近的不敏感周跳。北斗三频实测数据证实，多个GF组合有效提升了不敏感周跳的探测概率，数量以两个为宜，选取的组合量有效提升了不敏感周跳的探测概率。
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| 关 键 词： | 不敏感周跳 周跳探测 GF组合 优化组合量 |
| 收稿时间： | 2017-06-24 |
Using Triple-Frequency Data Combination to Detect Insensitive Cycle-Slip |
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| Institution: | 1.School of Surveying and Mapping, Information Engineering University, Zhengzhou 450001, China2.Unit 91793, Ledong 572500, China3.Electronic Information School, Wuhan University, Wuhan 430072, China |
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| Abstract: | For the issues of detecting insensitive cycle-slip in GNSS signals, this paper analyzes the generation and distribution of insensitive cycle-slip in three-dimensional coordinate system, researches the influence of the detection threshold on detecting insensitive cycle-slip, and then studies the effect of combined detection of combinations. A combination coefficient selection method is proposed for detecting insensitive cycle-slip. This method builds a function model based on the detection amount of combined coefficient, and screening the most sensitive combination coefficients. The method can detect insensitive cycle-slip with similar hop variables at three frequencies. As verified by the BeiDou triple-frequency measured data, multiple GF combinations effectively increase the detection probability of insensitive cycle-slip, and the appropriate number is two. The combination selected by proposed method effectively detect the manually added insensitive cycle-slip. |
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