| 单双频智能手机GNSS定位精度分析 |
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| 引用本文： | 王式太,杨诗妮,李雪珍.单双频智能手机GNSS定位精度分析[J].测绘通报,2021,0(1):18-23. |
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| 作者姓名： | 王式太 杨诗妮 李雪珍 |
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| 作者单位： | 桂林理工大学测绘地理信息学院,广西 桂林541000;桂林理工大学测绘地理信息学院,广西 桂林541000;桂林理工大学测绘地理信息学院,广西 桂林541000 |
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| 摘 要： | 为分析单、双频手机在单点定位和动态导航中的差异，本文对单、双频手机观测卫星数、信噪比、静态/动态定位中原始观测值/卡尔曼滤波值进行了对比和分析。试验结果表明，在静态无遮挡的试验条件下，小米MI8双频手机原始观测值较OPPO Reno单频手机定位误差均值减小了1.70 m且能观测到更多的卫星数，进行卡尔曼滤波处理后，单频手机较双频手机而言精度提升更多，两者最终精度相当。而在动态有遮挡的试验条件下，双频较单频定位误差均值减小了5.24 m，进行卡尔曼滤波处理后，两者精度均有明显改善，双频相对单频误差均值减小了0.87 m。
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| 关 键 词： | 智能手机 卡尔曼滤波 GNSSAnalysis产品 双频观测值 |
| 收稿时间： | 2020-08-16 |
Analysis of GNSS positioning accuracy of single and dual frequency smart phone |
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| WANG Shitai,YANG Shini,LI Xuezhen.Analysis of GNSS positioning accuracy of single and dual frequency smart phone[J].Bulletin of Surveying and Mapping,2021,0(1):18-23. |
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| Authors: | WANG Shitai YANG Shini LI Xuezhen |
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| Institution: | College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541000, China |
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| Abstract: | In order to analyze the difference between single-frequency and dual-frequency smartphones in single-point positioning and dynamic navigation,this paper compares and analyzes the number of satellites,SNR,the original observation values and Kalman filtering values in static or dynamic positioning observed by single-frequency and dual-frequency smart phones. The experimental results show that under the static and unobstructed experimental conditions,compared with the original observation value of OPPO Reno single-frequency smartphone,the average positioning error of Xiaomi Mi8 dual-frequency smart phone,which can be observed by more satellites and reduced by 1. 70 m. After Kalman filtering processing,the single-frequency mobile phone shows a higher accuracy improvement than the dual-frequency smart phone and the final precision of both is equivalent. Under the experimental conditions of dynamic occlusion,the average value of positioning error of dual frequency is reduced by 5. 24 m compared with that of single frequency. After Kalman filtering processing,the accuracy of both has been significantly improved,and the average error of dualfrequency relative to single-frequency is reduced by 0.87 m. |
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| Keywords: | smartphone Kalman filtering GNSS Analysis dual frequency observation |
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