摘要
超宽带(UWB)技术以其大宽带、低功率、高精度等优点广泛应用于室内定位。然而其本质上是一种通信信号体制,复杂环境下组网困难,所以UWB系统在复杂地下环境中仍有挑战。为此该文在UWB标准信号体制的基础上提出了导航增强型超宽带(Hnav-UWB),通过优化通信信息的冗余度简化帧结构,同时降低脉冲发送频率增加单个脉冲的能量,采用改进的跳时二进制相移键控(TH-BPSK)调制方式提高了信号的多用户和抗多径能力。另外,该文设计了动态重构节点网络适应复杂环境,该网络没有主从节点之分,通过双向测距获得两两距离,根据多维尺度变换(MDS)算法自建相对位置坐标,根据分布式协作定位(DCL)算法提高精度,最后根据最小二乘(LS)法利用某已知点在地图的位置进行地图匹配。基于自建的脉冲超宽带(IR-UWB)仿真系统试验,结果显示相同条件下Hnav-UWB的误码率比对照组降低10倍,定位精度提升3倍。经1000次蒙特卡罗模拟,动态重构网络匹配准确率达95%。
Ultra-WideBand(UWB)technology is widely used for indoor positioning due to its advantages of large bandwidth,low power,and high precision.However,since UWB is essentially a communication signal system and it is difficult to form a network in complex environments,UWB systems still face challenges in complex indoor environments such as underground.To address this issue,high concurrency and coverage Navigation UWB(Hnav-UWB)is proposed in this paper based on the UWB standard signal system.The frame structure is simplified by optimizing the redundancy of communication information,the pulse transmission frequency is reduced and the energy of each pulse is increased,and an improved Time Hopping Binary Phase Shift Keying(TH-BPSK)modulation method is adopted to enhance the signal’s multi-user and multipath capabilities.Moreover,a dynamic reconstruction node network is designed in this paper to adapt to complex environments.The network has no master-slave nodes,pairwise distances are obtained by bidirectional ranging,relative position coordinates are built by using the MultiDimensional Scaling(MDS)algorithm,accuracy is improved by using the Distributed Cooperative Localization(DCL)algorithm,and map matching is performed by using the Least Squares(LS)method based on the known position of a point on the map.Based on the selfbuilt Impulse-Radio Ultra-WideBand(IR-UWB)simulation system experiment,the results show that under the same conditions,Hnav-UWB’s bit error rate is 10 times lower than that of the control group,and the positioning accuracy is improved by 3 times.After 1000 Monte Carlo simulations,the matching accuracy of the dynamic reconstruction node network reaches 95%.
作者
李建佳
蔚保国
鲍亚川
杨梦焕
崔宋祚
田润泽
赵军
LI Jianjia;YU Baoguo;BAO Yachuan;YANG Menghuan;CUI Songzuo;TIAN Runze;ZHAO Jun(State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China)
出处
《电子与信息学报》
EI
CSCD
北大核心
2023年第11期4179-4189,共11页
Journal of Electronics & Information Technology
基金
国家重点研发计划(2021YFB3900800)
河北省省级科技计划(20310901D)。
关键词
超宽带
信号体制
组网定位
Ultra-WideBand(UWB)
Signal structure
Network-based positioning
作者简介
李建佳:男,博士生,研究方向为超宽带定位、通导一体化;通信作者:蔚保国:男,研究员,研究方向为北斗综合PNT体系、通导一体化.yubg@sina.cn;鲍亚川:男,高级工程师,研究方向为通导一体化、无线电定位;杨梦焕:男,博士,研究方向为通导一体化、卫星导航;崔宋祚:男,硕士,研究方向为通导一体化;田润泽:男,硕士生,研究方向为通导一体化;赵军:男,高级工程师,研究方向为芯片设计、卫星导航、超宽带定位.
