CAJ | 학술논문

针对现有无线传感器网络节点定位方法成本和复杂度较高的问题,提出了一种利用离去角度估计的分布式节点定位方法(AODL).锚节点利用阵列天线发射正交导频信号,从而使得各传感节点仅需配备常规的单天线系统便可获得导频信号的离去角度信息.结合锚节点的地理位置,各节点进而可进行自身的三维位置估计.AODL方法仅利用无线通信设备进行定位,节点的角度估计不需要配备阵列天线,具有低成本和低能耗的优点,同时各节点独立进行自身的角度估计和位置计算,是一种分布式的定位方法.仿真实验结果表明,对于100 m×100 m的定位区域,借助于4个装备3×3均匀面阵的锚节点,各传感节点在信噪比为15 dB时的平均定位误差可以达到1 m以内.
침대현유무선전감기망락절점정위방법성본화복잡도교고적문제,제출료일충이용리거각도고계적분포식절점정위방법(AODL).묘절점이용진렬천선발사정교도빈신호,종이사득각전감절점부수배비상규적단천선계통편가획득도빈신호적리거각도신식.결합묘절점적지리위치,각절점진이가진행자신적삼유위치고계.AODL방법부이용무선통신설비진행정위,절점적각도고계불수요배비진렬천선,구유저성본화저능모적우점,동시각절점독립진행자신적각도고계화위치계산,시일충분포식적정위방법.방진실험결과표명,대우100 m×100 m적정위구역,차조우4개장비3×3균균면진적묘절점,각전감절점재신조비위15 dB시적평균정위오차가이체도1 m이내.
A novel distributive localization method using the angle of departure (AODL) is pro-posed to reduce the cost and complexity of existing localization methods for wireless sensor net-works. The anchors emit time-division pilots to the network using multi-antenna system, and each sensor just utilizes single-antenna system to estimate the angle of departure (AOD) of the pilot, by which the sensor's position can be determined. The AODL only relies on radio trans-ceivers, and the sensors estimate the angle information without the need of conventional multi-an-tenna system, so that the system complexity is greatly reduced. Moreover, the angle estimation and position calculation are conducted at each sensor in a completely distributed manner. The simulation results show that for a 100 m×100 m region, with the assistance of four anchors equipped with 3×3 uniform planar array, the average location error is within 1 m when the sig-nal-to-noise ratio of each sensor is 15dB.