基于信号旋转定位机制的LTE网络坐标捕获算法  

LTE Network Coordinate Acquisition Algorithm Based on Signal Rotation and Location Mechanism

作　　者：黄寅[1] HUANG Yin(Chuzhou Branch of Anhui Radio and Television University,Chuzhou Anhui 239000,China)

机构地区：[1]安徽广播电视大学滁州分校,安徽滁州239000

出　　处：《重庆科技学院学报（自然科学版）》2020年第1期76-80,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：上海市科学技术委员会2018年度重点科研项目“虚拟角色智能对话生成系统关键技术研究”(18511105502)。

摘　　要：针对LTE网络坐标捕获算法存在的信号抗噪能力较弱、定位坐标精度不高等问题,提出了一种基于信号旋转定位机制的LTE网络坐标捕获算法(CA-SRL算法)。考虑信道噪声及频率偏移对定位信号的干涉效应,结合角度映射及发射预成型过程,设计抗噪信号传输模型,利用正交定位的抗噪性能削弱信道噪声影响。通过角度映射中心与待定位终端之间存在的拓扑映射关系,构建基于锚节点—信号旋转方式的定位结构,依据待定位终端存在的频率偏差设计锚节点动态部署方案,提高定位过程的收敛效率。仿真实验结果表明,与常用的协商博弈坐标捕获方案和用户节点上行配对坐标捕获方案相比,CA-SRL算法的捕获坐标误差更小、坐标获取轮数更少。In order to overcome the shortcomings of the current LTE network coordinate acquisition algorithms,such as poor signal anti-noise ability,poor convergence performance of coordinate acquisition process and low coordinate accuracy,a new LTE network coordinate acquisition algorithm based on signal rotation and positioning mechanism is proposed in this paper.Firstly,considering the interference effect of channel noise and frequency offset on location signal,combined with angle mapping and transmission pre-shaping process,an anti-noise signal transmission model is designed by using the anti-noise performance of orthogonal positioning to reduce the influence of channel noise.Then,through the topological mapping relationship between the angle mapping center and the terminal to be positioned,a positioning structure based on the anchor node-signal rotation mode is constructed.According to the frequency deviation of the terminal to be positioned,the dynamic deployment scheme of the anchor node is designed,which significantly improves the convergence efficiency of the positioning process and further improves the coordinate accuracy.The simulation results show that compared with the commonly used Negotiation Game Method(NGM)and User Pairing Algorithm for LTE Femtocell Uplink(UP),the proposed algorithm has the advantages of small coordinate error accuracy and low number of coordinate acquisition rounds.

关 键 词：LTE网络 坐标 定位精度 频率偏差 信道噪声 角度映射 发射预成型 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]