基于到达相位技术的室内定位系统研究与实现  

Indoor positioning system research and implementation based on phase of arrival

作　　者：姚飞[1] 陶偲 刘守印[1] 

机构地区：[1]华中师范大学物理科学与技术学院,武汉430079

出　　处：《电子测量技术》2016年第11期30-35,共6页Electronic Measurement Technology

基　　金：华中师范大学中央高校基本科研业务费项目(CCNU14F01005)资助

摘　　要：研究了基于到达相位测距的性能,设计实现了基于到达相位技术的小型地下停车场定位系统。AT86RF233芯片可测量载波相位,根据不同频率射频信号的相位差可计算距离。设计了可变限幅均值滤波算法自适应限制测距结果的较大波动保证实时性的前提下优化了结果平滑性。在三锚节点的室内定位系统中,设计了基于加权最小均方误差的质心定位算法,改进了质心定位算法中定位点的选择方式。实地实验结果验证了算法的有效性,系统的实时跟踪精度达到亚米级,可用于小型室内停车场车辆和人员定位。This paper investigates the distance measurements performance of ranging by POA （phase of arrive） and implements a small underground parking lot positioning system based on POA . AT86RF233 uses phase shift measurements of different carrier waves to calculate the distance .This paper designs the variable amplitude‐limiting and average filtering algorithm to improve real‐time and smoothness performance of ranging results .Then implements the centroid localization algorithm based on weighted minimum mean square error which improves the centroid selection method of centroid localization algorithm in 3‐anchors indoor position system .The field experiments’ results verifies the effectiveness of the algorithms .the tracking accuracy of the indoor positioning system reaches sub‐meter level and it can be used for vehicle and personnel tracking in small indoor parking lots .

关 键 词：到达相位 室内定位 AT86RF233 可变限幅均值滤波算法 加权最小均方误差法 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]