摘要
针对Android智能手机GNSS信号脆弱、抑径能力较差、观测值易出现粗差和周跳的问题,为了实现智能手机BDS/GPS/GAL高精度定位,提出一种不确定度联合高度角的随机模型确定观测值噪声矩阵的卡尔曼滤波参数估计算法和观测数据质量控制方法,采用验前与验后联合检测的手段进行数据预处理。静态试验结果表明,小米8及华为P40智能手机GPS/GAL/BDS组合定位模式E/N/U单方向精度均优于0.3 m。小米8智能手机GPS/GAL/BDS组合定位模式的平面定位精度相较于GPS、BDS和GPS/BDS分别提升了33.5%、80%和27.5%。与小米8智能手机相同,华为P40智能手机GPS/GAL/BDS组合定位模式的平面定位精度相较于其余3种定位模式分别提升了42.3%、27.5%和12.8%。动态试验结果表明,GPS/GAL/BDS组合定位模式平面定位精度为0.72 m,相较于GPS和GPS/BDS提升了24%以上。
The GNSS signal of Android smart phone is weak and has poor path suppression ability.At the same time,the observed values are prone to gross errors and cycle slips.In order to achieve high-precision positioning of the BDS/GPS/GAL for smartphone,a Kalman filter parameter estimation algorithm and an observation data quality control method are proposed to determine the noise matrix of observation values by a random model with uncertain joint height angle.Then,data is preprocessed by pre-test and post-test joint detection.Static test results show that the E/N/U single direction accuracy of the GPS/GAL/BDS combined positioning mode of Xiaomi 8 and Huawei P40 smartphones is better than 0.3 m.Compared with GPS,BDS and GPS/BDS,the plane positioning accuracy of Xiaomi 8 smart phone GPS/GAL/BDS combined positioning mode has increased by 33.5%,80%and 27.5%respectively.Same as Xiaomi 8 smartphone,the plane positioning accuracy of Huawei P40 smart phone GPS/GAL/BDS integrated positioning mode has increased by 42.3%,27.5%and 12.8%comparing with that of the other three positioning modes.Dynamic test results show that the plane positioning accuracy of GPS/GAL/BDS combined positioning mode is 0.72 m,which has increased by 24%comparing with that of GPS and GPS/GAL.
作者
徐彦田
刘巍峰
李玉星
姜鼎璇
XU Yantian;LIU Weifeng;LI Yuxing;JIANG Dingxuan(Chinese Academy of Surveying and Mapping,Beijing 100036,China;School of Geomatics,Liaoning Technical University,Fuxin 123032,China)
出处
《无线电工程》
北大核心
2023年第5期1061-1067,共7页
Radio Engineering
基金
国家重点研发计划(2021YFB3900803)
基本科研业务费项目(AR2102)。
