为了解决物联网室内精确定位与导航问题,蓝牙5.1标准规范优化了室内定位方案,新增了AoA(Angle of Arrival)和AoD(Angle of Departure)技术。本文首先介绍蓝牙室内定位技术发展。随后,对当前主流室内定位技术的原理、特点进行了简要概述...为了解决物联网室内精确定位与导航问题,蓝牙5.1标准规范优化了室内定位方案,新增了AoA(Angle of Arrival)和AoD(Angle of Departure)技术。本文首先介绍蓝牙室内定位技术发展。随后,对当前主流室内定位技术的原理、特点进行了简要概述。此外,为了更好的适应室内复杂的地理环境和电磁环境,讨论了多技术融合的室内定位系统。最后,指出蓝牙室内定位技术的发展机遇与挑战。展开更多
Time delay-based the 5th Generation Mobile Communication Technology(5G)positioning is a main method to perform high-precision positioning in Global Navigation Satellite System(GNSS)denied areas.However,in practical ap...Time delay-based the 5th Generation Mobile Communication Technology(5G)positioning is a main method to perform high-precision positioning in Global Navigation Satellite System(GNSS)denied areas.However,in practical applications,the occlusion of signals in a complex environment results in few observable base stations,which affects the reliability and accuracy of positioning.The aim of this study is to improve the performance of the 5G positioning in complex environments with an insufficient number of observable base stations.First,the Angle of Departure(AOD)capability of multi-antennas is integrated into Multi-Round-Trip-Time(Multi-RTT)positioning,establishing a novel 5G RTT/AOD positioning model.Then,the influencing factors of positioning performance,including the Dilution of Precision(DOP)and the accuracy of the AOD measurements,is analyzed.The relationship between DOP and RTT/AOD positioning accuracy is deduced.Afterwards,simulation experiments are performed on 5G positioning with the Multi-RTT and RTT/AOD methods in two scenarios with good and complex environments.The theoretical analysis and experimental results show that 5G positioning with the RTT/AOD method increases the horizontal and vertical accuracies by approximately 25 and 65%,respectively,compared with the Multi-RTT method.The positioning reliability is also greatly improved.The proposed model can well solve the inefficiency of 5G positioning with the RTT method in scenarios where the number of base stations is less than three.展开更多
文摘为了解决物联网室内精确定位与导航问题,蓝牙5.1标准规范优化了室内定位方案,新增了AoA(Angle of Arrival)和AoD(Angle of Departure)技术。本文首先介绍蓝牙室内定位技术发展。随后,对当前主流室内定位技术的原理、特点进行了简要概述。此外,为了更好的适应室内复杂的地理环境和电磁环境,讨论了多技术融合的室内定位系统。最后,指出蓝牙室内定位技术的发展机遇与挑战。
基金Grant No.2018YFC0809804National Science Foundation of China under Grant No.41974038major consulting research project of the Chinese Academy of Engineering(HB2020B13).
文摘Time delay-based the 5th Generation Mobile Communication Technology(5G)positioning is a main method to perform high-precision positioning in Global Navigation Satellite System(GNSS)denied areas.However,in practical applications,the occlusion of signals in a complex environment results in few observable base stations,which affects the reliability and accuracy of positioning.The aim of this study is to improve the performance of the 5G positioning in complex environments with an insufficient number of observable base stations.First,the Angle of Departure(AOD)capability of multi-antennas is integrated into Multi-Round-Trip-Time(Multi-RTT)positioning,establishing a novel 5G RTT/AOD positioning model.Then,the influencing factors of positioning performance,including the Dilution of Precision(DOP)and the accuracy of the AOD measurements,is analyzed.The relationship between DOP and RTT/AOD positioning accuracy is deduced.Afterwards,simulation experiments are performed on 5G positioning with the Multi-RTT and RTT/AOD methods in two scenarios with good and complex environments.The theoretical analysis and experimental results show that 5G positioning with the RTT/AOD method increases the horizontal and vertical accuracies by approximately 25 and 65%,respectively,compared with the Multi-RTT method.The positioning reliability is also greatly improved.The proposed model can well solve the inefficiency of 5G positioning with the RTT method in scenarios where the number of base stations is less than three.
