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

作　　者：何蒋威 黄腾达 李敏[2] He Jiangwei;Huang Tengda;Li Min(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;GNSS Research Center,Wuhan University,Wuhan 430079,China)

机构地区：[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

出　　处：《测绘地理信息》2024年第5期28-32,共5页Journal of Geomatics

基　　金：中央高校自主科研项目(2042022dx0001)

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。The open access to raw Global Navigation Satellite System(GNSS)observations brings new opportunities to the development of Android smartphone precise positioning technology.However,limited by the low-cost GNSS chips and linearly polarized antennas integrated inside smartphones,the GNSS observations of smartphones have different error characteristics than traditional measurement receivers,among which the code-carrier inconsistency error is an important factor 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 accuracy of the online calibration solution is approximately 0.399 m respectively,which is improved by one order of magnitude 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 

分 类 号：P228[天文地球—大地测量学与测量工程] TN967[天文地球—测绘科学与技术]