Measured Evaluation of Positioning Accuracy on GNSS for Heterogeneous Wireless System
Measured Evaluation of Positioning Accuracy on GNSS for Heterogeneous Wireless System
复制标题
异构无线系统GNSS定位精度实测评估
DOI：
10.1109/ictc.2015.7354581
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Kazuo Tsubouchi
中科院分区：
文献类型：
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作者：
H.Oguma;Keita Norishima;Konatsu Suehiro;Suguru Kameda;Noriharu Suematsu;Tadashi Takagi;Kazuo Tsubouchi
对于异构无线网络，利用全球导航卫星系统（GNSS）（诸如全球定位系统（GPS）、日本的准天顶卫星系统（QZSS）和俄罗斯的全球导航卫星系统（GLONASS））的定位信息已经非常有效。本文阐述了不同GNSS定位精度与天空视角因子的定量关系。提出了在GNSS定位精度中应用天空视角因子的概念，并通过图像处理实现了天空视角因子的量化。分析了GNSS定位精度与天空视角因子的关系。在天空视角因子为88.2%的点处，使用诸如GPS+GLONASS或DGPS+GLONASS的多GNSS接收器来估计定位精度低于1m。在天空视角因子为42.2%的点处，定位精度维持在低于1m。在天空视角因子为11.1%的情况下，使用DGPS+GLONASS接收机将定位精度提高到3m以下。此外，作为QZSS与GPS相比在11.1%点处的优势，30分钟内的不可能定位时间从GPS上的80秒改善到QZSS上的4秒。实现了由天空视角因子对定位精度的推定。我们的结论是天空的看法因素是非常有效的推定定位精度在移动的位置。
For heterogeneous wireless network, the use of positioning information with global navigation satellite system (GNSS) such as global positioning system (GPS), quasi zenith satellites system (QZSS) in Japan and the global navigation satellite system in Russia (GLONASS) has been very effective. In this paper, the quantitative relation of positioning accuracy on various GNSS and sky view factor are described. We propose the application of a concept of the sky view factor for position accuracy on GNSS, and achieve quantification of sky view factor by image processing. The relationship of positioning accuracy on GNSS and sky view factor are evaluated. At the point where sky view factor is 88.2%, the positioning accuracy is estimated lower than 1 m using the multi GNSS receiver such as GPS+GLONASS or DGPS+GLONASS. At the point where sky view factor is 42.2%, the positioning accuracy is maintained lower than 1 m. At the point where sky view factor is 11.1%, positioning accuracy is improved lower than 3 m using DGPS+GLONASS receiver. Furthermore, as an advantage of QZSS compared to GPS at 11.1% point, the impossible positioning time in 30 minutes is improved from 80 seconds on GPS to 4 seconds on QZSS. Presumption of the positioning accuracy by sky view factor is achieved. We conclude that sky view factor is very effective in presumption of positioning accuracy at mobile location.