北斗伪卫星信号的室内多径传播特性

doi:10.13474/j.cnki.11-2246.2019.0173

测绘通报 ›› 2019, Vol. 0 ›› Issue (6): 1-4,10.doi: 10.13474/j.cnki.11-2246.2019.0173

• 学术研究 • 下一篇

北斗伪卫星信号的室内多径传播特性

王欣怡¹, 潘树国¹, 蔚保国², 王彦恒¹, 甘兴利²

1. 东南大学仪器科学与工程学院, 江苏南京 210096;
2. 中国电子科技集团公司第五十四研究所, 河北石家庄 050081

收稿日期:2018-10-31 修回日期:2019-01-22 出版日期:2019-06-25 发布日期:2019-07-01
通讯作者: 潘树国。E-mail:psg@seu.edu.cn E-mail:psg@seu.edu.cn
作者简介:王欣怡(1995-),女,硕士生,主要从事基于伪卫星的室内定位研究。E-mail:220173221@seu.edu.cn
基金资助:
国家重点研发计划（2016YFB0502101）；国家自然科学基金（41574026；41774027）

Indoor multipath propagation characteristics of BeiDou pseudolite signal

WANG Xinyi¹, PAN Shuguo¹, YU Baoguo², WANG Yanheng¹, GAN Xingli²

1. School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China;
2. The 54 th Research Institute of CETC, Shijiazhuang 050081, China

Received:2018-10-31 Revised:2019-01-22 Online:2019-06-25 Published:2019-07-01

摘要/Abstract

摘要：

北斗伪卫星系统因其较强的抗干扰能力和灵活机动的组网能力可以应用于室内位置服务。多径效应是影响伪卫星定位精度的主要因素，因此，掌握北斗伪卫星室内多径传播特性是抑制多径、提高定位精度的前提。本文针对北斗伪卫星特有的信号体制，利用射线追踪法，研究了室内环境下伪卫星信号路径损耗、功率角度分布等多径特性参数，通过Wireless Insite软件，构建了大型商场的三维模型，在此基础上进行了仿真试验验证。结果表明，伪卫星多径数量在非视距条件下会急剧减少，且伪卫星多径分量以相近功率值分布在特定范围的水平方向角内；同时其衰落信道模型服从小尺度衰落，符合瑞利-对数正态分布，大尺度衰落与对数距离路径损耗模型相吻合。

关键词: 北斗伪卫星, 多径效应, 传播特性

Abstract:

BeiDou pseudolite system can be applied to indoor location service because of its strong anti-interference ability and flexible networking capabilities. Multipath effect is the main factor affecting the accuracy of pseudolite positioning. Therefore, mastering the indoor multipath propagation characteristics of BeiDou pseudolite is the premise of suppressing multipath and improving positioning accuracy. In this paper, based on the unique signal system of BeiDou pseudolite, the multipath characteristic parameters such as path loss and power angle distribution of pseudolite signals in indoor environment are studied by ray tracing method. The three-dimensional model of large-scale shopping mall is constructed by Wireless Insite software. The simulation results show that the pseudolite multipath components will decrease sharply under non-line-of-sight conditions and will be distributed in a certain range of horizontal direction angles with similar power values, while the fading channel model obeys the small-scale fading in accordance with the Rayleigh-lognormal distribution, and the large-scale fading coincides with the log-distance path loss model.

Key words: BeiDou pseudolite, multipath effect, propagation characteristics

中图分类号:

P228

王欣怡, 潘树国, 蔚保国, 王彦恒, 甘兴利. 北斗伪卫星信号的室内多径传播特性[J]. 测绘通报, 2019, 0(6): 1-4,10.

WANG Xinyi, PAN Shuguo, YU Baoguo, WANG Yanheng, GAN Xingli. Indoor multipath propagation characteristics of BeiDou pseudolite signal[J]. 测绘通报, 2019, 0(6): 1-4,10.

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北斗伪卫星信号的室内多径传播特性

Indoor multipath propagation characteristics of BeiDou pseudolite signal

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