摘要
针对受手机芯片、工艺等限制,智能手机原始伪距观测值测量噪声大,易受多路径等误差影响,致使常规数据处理手段无法满足较高精度的定位需求等问题,该文提出了基于多普勒平滑伪距的方法。该方法综合利用多普勒观测值具有较好的观测精度,且不受多路径误差的干扰的优势,采用多普勒观测值对伪距进行平滑,研究确定了多普勒平滑策略和阈值,较好地改善了数据质量。实验数据表明:多普勒平滑伪距可较好地改善数据质量,提高定位精度,定位结果在E方向提高了67.8%、N方向提高了64.9%、U方向提高了65.6%。
Due to the limitations of mobile phone chips and technology,the original pseudorange observations of smartphones have a large measurement noise and are susceptible to errors such as multi-path.As a result,conventional data processing methods cannot meet the high accuracy positioning requirements.Aiming at this problem,this paper proposes a method based on Doppler smoothing pseudorange,which comprehensively utilizes the advantages of Doppler observations that have better observation accuracy and are not disturbed by multipath errors.The Doppler observations were used to smooth the pseudorange.The Doppler smoothing strategy and threshold were determined by research,which improved the data quality better.The experimental data show that the Doppler smoothed pseudorange can better improve the data quality and improve the positioning accuracy.The positioning results are increased by 67.8%in the E direction,64.9%in the N direction,and 65.6%in the U direction.
作者
肖青怀
谷守周
秘金钟
陈秉柱
陈冲
XIAO Qinghuai;GU Shouzhou;BEI Jinzhong;CHEN Bingzhu;CHEN Chong(Chinese Academy of Surveying and Mapping,Beijing 100036,China;Beijing Fangshan Satellite Laser Ranging National Observation and Research Station,Beijing 102488,China;Shandong University of Science and Technology,Qingdao,Shandong 266590,China)
出处
《测绘科学》
CSCD
北大核心
2020年第7期11-17,共7页
Science of Surveying and Mapping
基金
国家重点研发计划课题项目(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项目(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项目(2020-10)。
关键词
智能手机
伪距平滑
多普勒
单点定位
精度分析
smartphone
pseudorange smoothed
Doppler
single point positioning(SPP)
accuracy analysis
