摘要
高精度的室内定位技术在国防军事、工业制造等领域发挥了不可替代的作用,为此本文提出了一种基于到达角的高精度多站定位系统。现在的通信网络都使用了正交频分复用(OFDM)技术和多天线技术,首先利用OFDM子载波的信道状态信息(CSI)和阵列天线构建到达角(AOA)和到达时间(TOA)的参数模型;其次利用最大似然算法对信源的参数进行估计;然后考虑到实际的网络信号存在同步误差,无法使用TOA进行测距,为了实现定位,构建基于多站AOA的定位模型;最后,试验结果表明本文所提方法具有良好的性能。
High-precision indoor positioning technology plays an irreplaceable role in the fields of national defense,military and industrial manufacturing.Therefore,this paper proposes a high-precision multi-station positioning system based on Angle of arrival.The existing communication networks all use Orthogonal Frequency Division Multiplexing(OFDM)technology and multi-antenna technology,Therefore,in this paper,the estimation model of Angle of Arrival(AOA)and Time of Arrival(TOA)is firstly constructed by using the Channel State Information(CSI)and array antenna of OFDM subcarriers.Then the maximum likelihood algorithm is used to estimate the source parameters.Secondly,considering the actual network signal has synchronization error,so TOA cannot be used for ranging.In order to realize localization,this paper constructs localization model based on multi-station AOA.Finally,experimental results show that the proposed method can achieve good performance.
作者
余晔
鲁月新
郑鸿云
YU Ye;LU Yuexin;ZHENG Hongyun(Chongqing Servey Institute,Chongqing 401121,China)
出处
《测绘通报》
CSCD
北大核心
2022年第S02期29-33,共5页
Bulletin of Surveying and Mapping
关键词
5G
室内定位
到达角
正交频分复用
5G
indoor positioning
angle of arrival
orthogonal frequency division multiplexing
