%0 Journal Article
%T 采用多载波相位测距的Wi-Fi精密定位方法<br>A Precise Positioning Method of Wi-Fi Using Multi-Carrier Phase Ranging
%A 贺磊南
%A 卢虎
%A 姬正洲
%J 西安交通大学学报
%D 2017
%R 10.7652/xjtuxb201708011
%X 针对当前室内无线局域网Wi？？Fi定位方法误差大、需要额外辅助设备的问题,提出了一种基于多载波相位测距的Wi？？Fi精密定位方法。在测距环节,通过中国剩余定理求解多载波相位同余式组实现了距离重构,并给出了一种采用同差处理以降低算法噪声敏感性的方法;在定位环节,基于最小测距误差平方和准则,将带有误差的多边测距定位问题转化为受约束的二次最优规划问题,实现了分米级的Wi-Fi定位。实验与仿真结果均表明,所提方法的测距精度可达mm级,定位精度在dm级,较主流MUSIC Wi-Fi定位方法3～5 m的定位精度提升了4倍以上。<br>A novel precise positioning method of Wi？？Fi based on multi？？frequency carrier phase range estimation is proposed to solve the problem that the existing indoor Wi？？Fi positioning methods are of low positioning accuracy and need extra auxiliary devices. The distance reconstruction is realized in the ranging step by solving the congruence group of multi？？carrier phase based on Chinese remainder theorem (CRT), and a method using the common difference process is given to reduce the noise sensitivity of the algorithm. The positioning problem is transformed into a constrained quadratic optimization problem in the positioning phase based on the minimum criterion of square sum of ranging errors. Simulation and experimental results show that the proposed algorithm achieves the accuracy of millimeter resolution and the positioning accuracy is in sub？？meter level. A comparison with the MUSIC positioning method with 3-5 meters accuracy shows that the performance of the proposed positioning method is improved by more than 4 times
%K 无线局域网
%K 中国剩余定理
%K 载波相位
%K 二次规划&lt
%K br&gt
%K wireless local network
%K Chinese remainder theorem
%K carrier phase
%K quadratic optimization
%U http://zkxb.xjtu.edu.cn/oa/DArticle.aspx?type=view&id=201708011