| 城市环境下GPS/BDS融合伪距定位性能分析 |
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| 引用本文： | 王翀,王振杰.城市环境下GPS/BDS融合伪距定位性能分析[J].测绘工程,2018(5):23-27. |
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| 作者姓名： | 王翀 王振杰 |
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| 作者单位： | 中国石油大学(华东),山东 青岛,266580 |
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| 基金项目： | 国家自然科学基金资助项目(41631073;41374008)，山东省自然科学基金(ZR2015DL004)，浙江省科技计划项目(2016C31123) |
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| 摘 要： | 观测环境的优劣对卫星定位结果有着显著影响,城市环境信号遮挡强、多路径效应明显,导致定位连续性差、可靠性低。文中讨论GPS/BDS时空系统统一以及融合解算中伪距定位数学模型,利用香港地区城市环境实测数据对GPS/BDS双系统融合伪距定位结果与GPS、BDS单系统在可见卫星数、PDOP值、定位连续性、可靠性等方面进行比较分析。结果表明:多系统融合伪距定位相比单系统增加可见卫星数,减小PDOP值,明显改善城市环境定位连续性,小幅度提高定位精度。
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| 关 键 词： | 北斗卫星导航系统 融合定位 伪距定位 BeiDou System fusion positioning pseudo-range positioning |
Analysis of GPS/BDS combined pseudo-range positioning performance in urban environment |
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| WANG Chong,WANG Zhenjie.Analysis of GPS/BDS combined pseudo-range positioning performance in urban environment[J].Engineering of Surveying and Mapping,2018(5):23-27. |
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| Authors: | WANG Chong WANG Zhenjie |
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| Abstract: | The observation environment has a great influence on the accuracy of satellite positioning.The solution is vulnerable on the continuity and reliability in urban area because of obstructed signals and multipath.This paper first discusses the unification of time and coordinate system between GPS and BDS, and the mathematical model of GPS/BDS combined pseudo-range positioning.And then observational data of Hong Kong is used to compare GPS/BDS combined solution result with GPS and BDS single system solution result on the aspects of satellite visibility,PDOP value,positioning continuity and reliability in urban area.The numerical result shows that compared with the pseudo-range positioning of single system, the number of visible satellites can increase and the PDOP value can decrease with combined GPS/BDS.In addition,the combined system can effectively improve the positioning continuity and slightly improve the positioning accuracy. |
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