华为P30手机GPS/BDS/GLONASS/Galileo观测值随机模型优化及定位性能分析

针对P30智能手机采用GPS/BDS/GLONASS/Galileo等多系统定位时的随机模型进行研究，重点对使用多系统手机观测值定位时的伪距噪声进行评估，并分析不同随机模型对手机伪距单点定位精度的影响。结果表明，华为P30智能手机不同系统卫星伪距噪声差异较大，GPS、BDS、GLONASS、Galileo的伪距噪声中误差分别为5.30 m、2.75 m、7.92 m和1.07 m。采用信噪比+系统间加权的随机模型时手机终端的定位性能最优，相比于传统高度角模型，该随机模型在E、N、U方向上的伪距单点定位精度分别提升了36.12%、25.79%、31.30%。

Improvement of Stochastic Model and Positioning Performance Analysis of GPS/BDS/GLONASS/Galileo Observations of Huawei P30 Smartphone

This paper studies the random model of Huawei P30 smartphone positioning with GPS/BDS/GLONASS/Galileo and other multi-system. It focuses on the evaluation of pseudorange noise when using multi-system mobile phone observations and analyzes the influence of different random models on the pseudorange single point positioning accuracy of mobile phone. The results show that the satellite pseudorange noise of different systems of Huawei P30 smartphone varies greatly. The mean square error of pseudorange noise of GPS, BDS, GLONASS and Galileo are 5.30 m, 2.75 m, 7.92 m and 1.07 m, respectively. When using the random model of signal-to-noise ratio+inter system weighting, the positioning performance of mobile terminal is the best. Compared with the traditional altitude angle model, the pseudorange single point positioning accuracy in E, N and U directions is improved by 36.12%, 25.79% and 31.30%.