CAJ | 학술논문

定位技术是无线传感器网络的重要研究内容。提出一种应用于井下环境的无线传感器网络快速定位方法。首先提出一种新的基于UWB（Ultra Wideband）的通信协议来对接收信号强度（RSS）信息进行收集，即一种称为U-BOTH（基于OVSF和跳时的UWB技术）的UWB编码方法，然后提出一种适用于井下环境的快速定位算法。通过推导UWB路径损耗模型，应用极大似然估计来计算与参照传感器之间的距离，并使用最小方差估算移动传感器的坐标。仿真结果表明，在路径损耗模型下，U-BOTH传输技术可以有效地降低误码率，测距和定位算法能够准确计算目标的井下位置。
정위기술시무선전감기망락적중요연구내용。제출일충응용우정하배경적무선전감기망락쾌속정위방법。수선제출일충신적기우UWB（Ultra Wideband）적통신협의래대접수신호강도（RSS）신식진행수집，즉일충칭위U-BOTH（기우OVSF화도시적UWB기술）적UWB편마방법，연후제출일충괄용우정하배경적쾌속정위산법。통과추도UWB로경손모모형，응용겁대사연고계래계산여삼조전감기지간적거리，병사용최소방차고산이동전감기적좌표。방진결과표명，재로경손모모형하，U-BOTH전수기술가이유효지강저오마솔，측거화정위산법능구준학계산목표적정하위치。
Localisation technique is the important research content in wireless sensor networks .In this paper we present a fast localisation algorithm for WSN applying in underground mines environments .First, we present a new UWB-based communication protocol to collect the received signal strength (RSS) information, i.e.it is a UWB coding approach called as U-BOTH (the UWB technique based on orthogonal variable spreading factor ( OVSF ) and time hopping ) .Then, we propose a fast localisation algorithm suitable for underground mines situation.Through deducing out the UWB path loss model , the algorithm applies the maximum likelihood estimation ( MLE) method to calculating the distances to the reference sensors and uses minimum variance to estimate the coordinates of the sensors .Simulation results show that the U-BOTH transmission technique can effectively reduce the bit error rate in path loss model , the raging and localisation algorithm can accurately calculate the location of objects in underground mine .