摘要
无线自组织网络(Ad Hoc)节点的位置信息提供路由选择及节点查询等功能。节点信号的到达时间(TOA)、到达时间差(TDOA)、信号到达入射角(AOA)和信号强度的测量值已被用作移动节点相对于参考信标的定位。对Ad Hoc网络节点定位进行了研究,基于所有节点均能提供TOA/TDOA测量值的假定,提出一种仅通过部分有定位能力节点就可计算所有节点在Ad-Hoc网络中位置的方法。在此基础上,使用泰勒级数展开算法和二次WLS估计求解非线性定位方程组,以获得更高的节点定位精度。
Position information of individual nodes is useful in implementing functions such as routing and querying in Ad- Hoc networks. Deriving position information by using the capability of the nodes to measure time of arrival （TOA）, time difference of arrival （TDOA）, angle of arrival （AOA） and signal strength have been used to localize nodes relative to a frame of reference. Study on positioning, this paper shows how TOA/ TDOA capability of the nodes can be used to determine all their position in an Ad- Hoc network where only a fraction of the nodes have positioning capabilities, under the assumption that each node has the TOA/TDOA capability. On the basis of this, both the Taylor series expansion algorithm and two - times WLS estimation are applied to optimize the location estimation.
出处
《信息技术》
2007年第4期65-67,70,共4页
Information Technology
