摘要
为了寻求一种适合超宽带(UWB:Ultra Wild-Band)系统的定位方法,从传统的若干定位技术入手,深入分析了适合超宽带系统的基于到达时间的TOA(Time of Arrival)方法,并给出了在无线传感器网络中UWB方式下的相对定位估计的理论分析和仿真结果,进一步证明了UWB系统采用TOA定位方式的优越性。在单跳无线传感器网络中,盲结点数目越多,整体定位精度越好;在多跳无线传感器网络中,当参考结点数目确定时,盲结点和参考结点间的链接数目越多,定位精度越好;跳数越多,定位精度越差。
We analyze the method based on TOA (Time of Arrival) which is appropriate for UWB (Uhra WildBand) system, among classical localization technologies, and presents the theoretic analysis and simulation resuits of the relative localization estimation with UWB in WSN (Wireless Sensor Networks). We prove the superiority of TOA localization method adopted in UWB system. In a single-hop WSN, the more the blindfolded nodes number the better localization precision is, in a multi-hop WSN, when the number of reference nodes is certain, the more links between blindfolded nodes and reference nodes, the better localization precision is; the more hop count, the worse localization precision is.
出处
《吉林大学学报(信息科学版)》
CAS
2008年第1期106-110,共5页
Journal of Jilin University(Information Science Edition)
关键词
超宽带
定位
盲结点
无线传感器网络
ultra wild-band (UWB)
localization
blindfolded node
wireless sensor network