CAJ | 학술논문

为了实现简单而精确的室内定位，并利用超宽带信号UWB(ultra-wide band)的特性，提出了基于异步UWB测距的椭圆室内位置估计方案AUREP(Asynchronous-UWB Range-elliptical indoor Position )。该方案由位置定位器locator、目标节点、参考节点组成。定位器先发射UWB信号，一旦接收该信号，目标节点进行转发。参考节点捕捉来自定位器、目标节点的信号，并通过计算这两不同路径的信号TOA(Time of arrival )差，最后，采用高斯-牛顿迭代算法估计目标节点的位置。与同步的球形定位系统SGPS (Synchronous-global position systems)不同，提出的方案无需同步机制。AUREP方案采用异步模式、无需同步设备，简化了系统。仿真结果表明提出的AUREP方案的定位精度高于双曲线定位系统SHPS(Asynchronous-Hyperbola Position systems)，同时，AUREP的定位误差逼近于克拉美-罗下限CRLB (Cramer-Rao lower bound)。
위료실현간단이정학적실내정위，병이용초관대신호UWB(ultra-wide band)적특성，제출료기우이보UWB측거적타원실내위치고계방안AUREP(Asynchronous-UWB Range-elliptical indoor Position )。해방안유위치정위기locator、목표절점、삼고절점조성。정위기선발사UWB신호，일단접수해신호，목표절점진행전발。삼고절점포착래자정위기、목표절점적신호，병통과계산저량불동로경적신호TOA(Time of arrival )차，최후，채용고사-우돈질대산법고계목표절점적위치。여동보적구형정위계통SGPS (Synchronous-global position systems)불동，제출적방안무수동보궤제。AUREP방안채용이보모식、무수동보설비，간화료계통。방진결과표명제출적AUREP방안적정위정도고우쌍곡선정위계통SHPS(Asynchronous-Hyperbola Position systems)，동시，AUREP적정위오차핍근우극랍미-라하한CRLB (Cramer-Rao lower bound)。
In order to realize the simple and accurate indoor positioning, with the characters of Ultra-wide band (UWB) signal, the asynchronous-UWB range-elliptical indoor position (AUREP) scheme is proposed in this paper. The AUREP consist of locator, reference-node and target-node. Locator firstly transmits the UWB signal, and re-ceived by target-node and retransmitted, reference-node received the signal from locator and target-node, and com-pute the different between TOA (Time of arrival), finally, the position of the target-node estimated by Gauss-Newton. Compared with synchronous-global position systems (SGPS), the AUREP is without synchronous mechanism. The AUREP adopt the asynchronous mechanism, without synchronous device, which make the systems simplified. Simu-lation result shows that the positional accuracy of the proposed AUREP outperform the asynchronous-Hyperbola Po-sition systems (SHPS), moreover, the position error of AUREP draw near the Cramer-Rao lower bound (CRLB).