超宽带技术下基于软两步法的目标定位  

Target Localization Based on Soft Two-step Method in Ultra-wideband Technology

作　　者：谢莹 XIE Ying(Suzhou Industrial Park Branch,Jiangsu Union Technical Institute,Suzhou 215123,China)

机构地区：[1]江苏联合职业技术学院苏州工业园区分院,江苏苏州215123

出　　处：《计算机测量与控制》2022年第12期257-263,共7页Computer Measurement &Control

基　　金：江苏省职业教育教学改革研究课题(124ZCZ124)。

摘　　要：针对采用超宽带技术的目标定位问题进行了研究,提出了直接估计目标位置及其改进的软两步法的定位方案;首先通过对超宽带信号模型和基于到达时间的典型两步定位方案原理的分析,提出了一种采用一组测量值或一组可能的ToA估计量直接估计目标节点位置的方案;为了消除该方案中阈值选择时存在的模糊性和强多径分量,提出了基于多ToA的定位方案,从而实现对目标节点的跟踪定位;仿真实验结果表明,提出的定位方案相比于典型的两步定位方案无论是在视距场景还是非视距场景中都具有更高的目标跟踪能力和更小的定位误差累计分布函数。Aiming at the problem of target location using ultra-wideband technology,The direct estimation of target position and the improved two-step positioning method are proposed.Firstly,by analyzing the ultra-wideband signal model and the principle of typical two-step locating scheme based on time of arrival(ToA),a direct estimation location scheme of target nodes using a set of measurements or a set of possible ToA estimators is proposed.Secondly,in order to eliminate the ambiguity and strong multipath components in the threshold selection of the scheme,a locating scheme based on multiple ToAs is proposed to realize the tracking and location of the target nodes.The simulation results show that compared with the typical two-step locating scheme,the proposed locating scheme has higher tracking ability and smaller cumulative distribution function of locating error in both line-of-sight and non-line-of-sight scenarios.

关 键 词：超宽带技术 目标定位 多径分量 到达时间 成本函数 最佳优先搜索 累积分布函数 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]