计算机工程 ›› 2019, Vol. 45 ›› Issue (5): 88-92.doi: 10.19678/j.issn.1000-3428.0050556

• 移动互联与通信技术 • 上一篇    下一篇

适用于多星座精密单点定位的性能评估优化方法

何为,郭承军,田忠   

  1. 电子科技大学 电子科学技术研究院,成都 611731
  • 收稿日期:2018-03-01 出版日期:2019-05-15 发布日期:2019-05-15
  • 作者简介:何为(1992—),男,硕士研究生,主研方向为卫星导航定位、惯性导航;郭承军,博士研究生;田忠,研究员。
  • 基金项目:

    国家部委基金。

Optimization method for multi-constellation precise point positioning performance evaluation

HE Wei,GUO Chengjun,TIAN Zhong   

  1. Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China,Chengdu 611731,China
  • Received:2018-03-01 Online:2019-05-15 Published:2019-05-15

摘要:

为减少多星座精密单点定位(PPP)数据处理过程中待估参数数量并提高定位精度,提出基于模糊度整数解的无电离层组合PPP性能评估方法。使用在线单点定位服务进行仿真建模,通过组合双频观测值消除电离层待估参数延迟并简化数据处理模型,利用模糊度固定技术实现PPP解算以降低定位误差。仿真结果表明,与单GPS系统PPP性能评估方法相比,静态模式下的GPS/GLONASS多星座PPP性能评估方法具有更高的定位精度和更快的收敛速度。

关键词: 多星座, 精密单点定位, 定位精度, 性能评估, 模糊度

Abstract:

In order to reduce the number of parameters to be estimated and improve the positioning accuracy in the data processing of multi-constellation Precise Point Positioning(PPP),a performance evaluation method based on ambiguity integer solution for the ionosphere-free PPP is proposed.The simulation model is built by using online point positioning service.The delay of estimated ionospheric parameters is eliminated and the data processing model is simplified by dual-frequency observations,and the error of PPP resolving is reduced by using the fixed ambiguity technique.Simulation results show that compared with single GPS system PPP performance evalution method,GPS/GLONASS multi-constellation PPP performance evalution method has higher positioning accuracy and faster convergence speed in static mode.

Key words: multi-constellation, Precise Point Positioning(PPP), positioning accuracy, performance evaluation, ambiguity

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