摘要
针对室内定位,提出异步测距定位系统。该系统由已知地理位置的超宽带定位器和具有能量检测的参考节点组成,其不同于目标点与参考节点同步的球形定位系统(SGPS,Synchronous-global position systems),也不同于仅参考节点之间同步的双曲线定位系统(SHPS,Synchronous-hyperbola position systems),而是采用异步的椭圆定位系统(AEPS,Asynchronous-elliptical position systems)。由于采用异步,无同步设备,系统得以简化。仿真结果表明,AEPS定位精准度优于SHPS,其定位误差逼近于克拉美-罗下限(CRLB,Cramer-Rao lower bound)。
An asynchronous position measurement system was addressed for indoor localization.The system is composed of UWB locator and energy detection reference node whose position is known,which is different from the synchronous-global position systems（SGPS） demanded synchronization between target node and reference node and is also different from the synchronous-hyperbola position systems（SHPS） only demanded synchronization in reference nodes.The proposed system is the asynchronous-elliptical position systems（AEPS）.No synchronization mechanism is implemented and the system is simplified.The simulation shows that the position accuracy is better than SHPS and achieves positioning error Cramer-Rao lower bound.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2013年第6期1420-1424,共5页
Journal of System Simulation
关键词
超宽带
定位测量
测距
到达时间
Ultra-wide band（UWB）
position measurement
range measurement
time of arrival（TOA）
