摘要
本文针对智能手机内部天线构造、GNSS接收芯片等因素限制,手机原始观测值易受外部环境影响,观测噪声大,导致定位精度较差的问题,面向大众导航定位需求,以提高手机伪距单点定位精度为目标,在对手机载波观测值周跳探测的基础上,研究对比分析了基于载波、多普勒平滑下的伪距单点定位的性能。试验表明:载波平滑伪距和多普勒平滑伪距都可以有效提高定位精度,但多普勒平滑伪距具有更好的稳定性且定位精度更好,统计显示在东(E)、北(N)、高(U)3个方向的均方根值(RMS)分别提高了52%、62%、60%,平面精度优于1.5 m。
Due to the limitations of the internal antenna structure and GNSS receiving chip of the smart phone,the original observation value of the phone is easily affected by the external environment,and the observation noise is large,which leads to the problem of poor positioning accuracy.In order to improve the accuracy of mobile phone’s pseudorange single point positioning,this paper studies and analyzes the performance of pseudorange single point positioning based on smoothed carrier and smoothed Doppler on the basis of detecting the cycle slip of mobile carrier observation value.The experimental results show that both carrier smoothed pseudorange and Doppler smoothed pseudorange can effectively improve the positioning accuracy,however,Doppler smoothed pseudorange has better stability and better positioning accuracy,the statistics showed that the RMS values in the three directions of east(E),north(N),and high(U) are respectively increased by 52%,62%,60%,and the planar accuracy entered 1.5 m.
作者
陈秉柱
郑作亚
谷守周
陈冲
秘金钟
单瑞
CHEN Bingzhu;ZHENG Zuoya;GU Shouzhou;CHEN Chong;BEI Jinzhong;SHAN Rui(Shandong University of Science and Technology,Qingdao 266590,China;Chinese Academic of Surveying and Mapping,Beijing 100830,China;China Academic of Electronics and Information Technology,Beijing 100041,China;Qingdao Institute of Marine Geology,CGS,Qingdao 266071,China)
出处
《测绘通报》
CSCD
北大核心
2020年第11期76-79,89,共5页
Bulletin of Surveying and Mapping
基金
国家重点研发计划(2016YFB0501801
2016YFB0502105
2016YFB0502101)
全球连续监测评估系统项目(CFZX0301040308-06)
中国测绘科学研究院基本科研业务费(AR1901)
湖南省自然资源调查与监测工程技术研究中心开放课题(2020-10)。
关键词
智能手机
周跳
载波相位
多普勒
伪距平滑
smart phone
cycle slip
carrier phase
Doppler
smoothed pseudorange
