Evaluation of the positioning performance of the multi-frequency multi-system RTK for smart phones
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摘要: 随着位置服务的发展，人们对定位精度的需求不断提升. 目前智能手机定位主要依赖于全球卫星导航系统(GNSS)芯片所提供的芯片解，其精度仅为米级. 2016年，谷歌宣布允许开发者获取手机GNSS原始观测数据，为研究手机GNSS高精度定位算法提供了支持. 为探索智能手机多频多系统实时动态(RTK)的定位精度和可靠性，文中基于华为P40智能手机开展了静态和动态环境下的多频多系统RTK的定位性能分析. 结果表明：在静态环境下，智能手机多频多系统的RTK定位精度要优于芯片解，在东(E)、北(N)、天(U)三个方向的定位误差均方根(RMS)分别为0.20 m、0.39 m和0.31 m，比芯片解提高了57%、71%和75%；在动态环境下的定位精度依然能够达到分米级，相比于芯片解在E、N、U三个方向上的定位精度提高了37.84%、47.22%、53.68%.
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关键词:
- 全球卫星导航系统(GNSS) /
- 实时动态(RTK) /
- 智能手机 /
- 定位性能分析 /
- 手机定位
Abstract: With the development of location-based service, people’s demand for the accuracy of smartphone positioning is increasing rapidly. At present, the smartphones positioning mainly relies on the chip solution provided by the Global Navigation Satellite System (GNSS) modules, whose accuracy is only at metre level. In 2016, Google announced to open the right to access to GNSS observation data, which supports the study of smartphone positioning algorithms. In order to explore the positioning accuracy and reliability of multi-frequency RTK with GNSS module for smartphones, the paper conducts experiments under static and dynamic conditions using Huawei P40 cellphone respectively. The results show that the real-time kinematic (RTK) positioning accuracy of the smartphone multiple-frequency multi-system is better than the chip solution in the static environment, with the root mean square (RMS) of positioning error in the east (E), north (N) and high (U) directions being 0.20 m, 0.39 m and 0.31 m, respectively, which is 57%, 71% and 75% better than the chip solution. The localization accuracy in dynamic environment can still reach the decimeter level, which is 37.84%, 47.22%, and 53.68% better than the chip solution in the three directions of east, north, and high respettlvely. -
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