码相不一致性对安卓手机精密单点定位的影响分析
The Impact Analysis of the Code-Carrier Inconsistency on Precise Point Positioning of Android Mobile Phones
何蒋威 1黄腾达 2李敏2
作者信息
- 1. 武汉大学测绘学院,湖北武汉,430079
- 2. 武汉大学卫星导航定位技术研究中心,湖北武汉,430079
- 折叠
摘要
安卓GNSS原始观测值的开放为智能手机精密定位技术的发展带来了新的机遇,但是受限于智能手机内部集成的低成本GNSS芯片和线性极化天线,智能手机的GNSS观测值表现出与传统测量型接收机不同的误差特性,其中码相不一致性误差是影响智能手机GNSS定位精度的重要因素.本文基于Huawei P40手机,对其GNSS观测值中的码相不一致性误差特性进行详细分析,并针对码相不一致性误差提出在线标定的解决方案.定位实验表明,在线标定解决方案的定位精度约为0.399 m,较不考虑码相不一致性的方案精度提高一个数量级.
Abstract
The open access to raw Global Navigation Satellite System (GNSS) observations brings new opportunities to the development of Android smartphone precise positioning tech-nology. However,limited by the low-cost GNSS chips and linearly polarized antennas integrated inside smartphones,the GNSS observations of smartphones have different error char-acteristics than traditional measurement receivers,among which the code-carrier inconsistency error is an important fac-tor affecting the GNSS positioning accuracy. Based on the Huawei P40 mobile phones,this article conducts a detailed analysis of the code-carrier inconsistency errors characteristics from its GNSS observations and proposes a solution,devoted as online calibration scheme for the code-carrier inconsistency errors. Positioning experiments show that the positioning ac-curacy of the online calibration solution is approximately 0.399 m respectively,which is improved by one order of mag-nitude when compared with the result without considering the code-carrier inconsistency error.
关键词
GNSS/精密单点定位/智能手机定位/码相不一致性Key words
GNSS/precise point positioning/smartphone positioning/code-carrier-phase inconsistency引用本文复制引用
基金项目
中央高校自主科研项目(2042022dx0001)
出版年
2024
NETL
NSTL
万方数据