利用方向性天线的Ad Hoc网络节点定位方法  

Novel localization with directional antennas in Ad Hoc networks

作　　者：单志龙[1] 

机构地区：[1]华南师范大学计算机学院,广州510631

出　　处：《计算机工程与应用》2009年第16期96-98,共3页Computer Engineering and Applications

基　　金：广东省自然科学基金(No.07006488);国家自然科学基金(No.10771080);广东省博士启动基金(No.06300907)~~

摘　　要：提出了一种新的基于方向性天线的AdHoc网络节点定位算法,当锚节点装配了智能天线或自适应天线阵列这样的方向性天线时,锚节点利用高分辨率的波达方向估计方法估计出节点向锚节点发送信号的方向,并根据收到的信号功率大小估算出节点和锚节点之间的距离后,锚节点即可完成对未知节点的定位。该方法只需要利用一个锚节点就可以完成未知节点的定位,且适当改变锚节点天线的阵列摆放,就可以提高定位的精度。理论分析和仿真实验证明了所得结论。This paper studies a localization method using Angle of Arrival （AOA） estimations by directional antenna equipped beacons in Ad-Hoe networks.The node to be localized sends a signal to its surrounding beacons. The beacons estimate the signal directions with high resolution AOA methods and calculate the distance between the node and the beacon using RSSI （Received Signal Strength Indicator）.Only one beacon is needed to estimate the location of the node in this method.When AOA estimates from two or more beacons are received,the averaging resolution method is proposed.As estimation bias is heavily dependent on antenna orientations the center-facing approach is found to give better performance in a square field.

关 键 词：方向性天线 AD HOC网络 定位 波达方向估计 

分 类 号：TN911.23[电子电信—通信与信息系统]