| 北斗伪卫星信号的室内多径传播特性 |
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| 引用本文： | 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. |
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| 作者姓名： | 王欣怡 潘树国 蔚保国 王彦恒 甘兴利 |
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| 作者单位： | 东南大学仪器科学与工程学院,江苏 南京,210096;中国电子科技集团公司第五十四研究所,河北 石家庄,050081 |
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| 基金项目： | 国家重点研发计划（2016YFB0502101）；国家自然科学基金（41574026；41774027） |
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| 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。
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| 关 键 词： | 北斗伪卫星 多径效应 传播特性 |
| 收稿时间： | 2018-10-31 |
| 修稿时间： | 2019-01-22 |
Indoor multipath propagation characteristics of BeiDou pseudolite signal |
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| WANG Xinyi,PAN Shuguo,YU Baoguo,WANG Yanheng,GAN Xingli.Indoor multipath propagation characteristics of BeiDou pseudolite signal[J].Bulletin of Surveying and Mapping,2019,0(6):1-4,10. |
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| Authors: | WANG Xinyi PAN Shuguo YU Baoguo WANG Yanheng GAN Xingli |
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| Institution: | 1. School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China;
2. The 54 th Research Institute of CETC, Shijiazhuang 050081, China |
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| 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. |
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| Keywords: | BeiDou pseudolite multipath effect propagation characteristics |
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