LTE定位中非视距误差的鉴别方法

The Hierarchical Collaborative Localization Algorithm for Non-line-of-sight Error Mitigation in LTE Cellular Network

非视距(NLOS)误差是影响长期演进技术(LTE)终端定位精度的一个主要因素。鉴别NLOS误差的主要目的是判断观测到达时间差(OTDOA)测量数据是否受到NLOS误差的影响,以便对OTDOA测量数据进行下一步处理。分析了非视距误差的模型以及非视距误差对LTE用户终端定位精度的影响,并用简化的非视距误差鉴别法来对NLOS误差进行鉴别。仿真结果表明,简化的非视距误差鉴别算法实现简单,且能准确地鉴别出非视距误差。

NLOS error is a major factor that affects the position accuracy of LTE terminals.The main purpose of NLOS error identification is to determine whether the OTDOA measured data is affected by NLOS error,then the OTDOA measured data can be further dealt with.The model of NLOS error is analyzed in this paper,the impact of NLOS error on the terminal position accuracy of LTE terminals is also analyzed in this paper.A simplified NLOS error identification method is used to identify NLOS error in this paper.Simulation results show that the simplified NLOS error identification method is easy to be implemented and the NLOS error can be accurately identified.