一种基于速度约束的智能手机RTD算法研究  

Research on RTD algorithm of smart phone based on speed constraint

作　　者：祝会忠[1] 王喆世 李俊鹏 王东明 ZHU Huizhong;WANG Zheshi;LI Junpeng;WANG Dongming(School of Surveying,Mapping and Geography,Liaoning Technical University,Fuxin,Liaoning 123000,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000

出　　处：《测绘科学》2023年第2期1-9,共9页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(42030109);卫星导航系统与装备技术国家重点实验室开放基金项目(CEPNT-2018KF-13);“兴辽英才计划”项目(XLYC2002101,XLYC2008034,XLYC2002098)。

摘　　要：针对受限于低成本信号接收与处理单元,手机伪距单点定位和伪距差分定位无法满足用户对定位精度的要求的问题,该文利用多普勒测速和历元间差分求解速度矢量约束位置解,构建附加多普勒原始观测值速度约束、附加伪速度约束和历元间位置约束的3种实时差分(RTD)模型。并与常规RTD模型进行对比,探究其在双频多系统下的定位精度及其稳定性。实验结果表明,3种模型相较于常规RTD都能有效提高定位精度,其中历元间位置约束的RTD模型定位精度的提升最为明显;静态模式下,小米8利用历元间位置约束的RTD定位下E、N、U方向提升分别为65%、50%和47%;在动态模式下,小米8利用历元间位置约束的RTD定位后,平面精度可提升43%。Due to the low cost signal receiving and processing unit,mobile phone pseudo range single point positioning and pseudo range differential positioning cannot meet the user’s requirements for positioning accuracy,the Doppler velocity measurement and inter epoch difference were used to solve the position solution of velocity vector constraint in this paper,and three RTD models with Doppler original observation velocity constraint,pseudo velocity constraint and inter epoch position constraint were constructed and compared with conventional RTD models to explore their positioning accuracy and stability under dual frequency multi system.Experimental results showed that the three models could effectively improve the positioning accuracy compared with conventional RTDs.Among them,the positioning accuracy of the inter epoch position constrained RTD model was most significantly improved.In the static mode,the E,N and U directions of Xiaomi 8phone were improved by 65%,50%and 47%respectively when using the inter epoch position constrained RTD positioning.In the dynamic mode,the plane accuracy of Xiaomi 8 phone could be improved by 43%after using the inter epoch position constrained RTD positioning.

关 键 词：智能手机 速度约束 历元间差分 RTD 定位性能分析 

分 类 号：TN929.53[电子电信—通信与信息系统] P228.4[电子电信—信息与通信工程]