低轨卫星增强GNSS/MIMU紧组合定位性能分析
Performance analysis of LEO satellites enhanced GNSS/MIMU tight integration positioning
丁虎山 1陈帅 1宋华 1丁鹏飞1
作者信息
- 1. 南京理工大学 自动化学院,南京 210094
- 折叠
摘要
针对智能手机内置低成本全球导航卫星系统(GNSS)存在的卫星信号衰减严重、伪距噪声大、抗干扰能力弱等问题,提出一种低轨(LEO)卫星增强GNSS/微惯性测量单元(MIMU)紧组合定位方法:基于智能手机采集的GNSS观测数据和MIMU的量测数据及开普勒轨道根数计算得到的LEO卫星观测数据构建紧组合算法模型;并对其定位性能进行分析.实验结果表明,增加 LEO 卫星观测量后,GNSS 的位置精度因子(PDOP)可降低 16.63%,组合导航系统水平和高程方向的定位精度提升至 1.361 m和 1.418 m;通过 LEO卫星增强能够显著提升智能手机 GNSS/MIMU紧组合定位性能.
Abstract
Aiming at the problems of severe satellite signal attenuation,high pseudorange noise and weak anti-interference capabilities in the low-cost global navigation satellite system(GNSS)built into smartphones,the paper proposed a tightly coupled navigation method using low Earth orbit(LEO)satellite constellations enhanced GNSS/miniature inertial measurement unit(MIMU):a tightly coupled navigation model was constructed by integrating GNSS satellite observation data and MIMU measurement data from the built-in devices of smartphones,and LEO satellite observation data calculated from Keplerian orbital elements;then,the performance of positioning was analyzed.Experimental result showed that the addition of LEO satellite observations would help reduce the position dilution of precision(PDOP)of GNSS by 16.63%,and the positioning accuracy in the horizontal and vertical directions of the integrated navigation system would be improved to 1.361 m and 1.418 m,respectively,indicating that the inclusion of LEO satellite could effectively enhance the positioning accuracy of GNSS/MIMU integrated navigation systems in smartphones.
关键词
低轨(LEO)卫星/组合导航/智能手机/微惯性测量单元(MIMU)/全球卫星导航系统(GNSS)Key words
low Earth orbit(LEO)satellite/integrated navigation/smartphone/miniature inertial measurement unit(MIMU)/global navigation satellite system(GNSS)引用本文复制引用
出版年
2024
NETL
NSTL
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