一种使用信号强度排序集合的单信标定位算法

摘要

In order to meet the demand of high-precision indoor position,we adopt wireless fidelity physical fine-grained channel state information of 802. 11n to build a signal strength hierarchical sorting collections location algorithm using a single set of anchor. Different channel state information values received from different channels due to indoor multipath effect,which phenomenon can be used to build a fingerprint database from various channels,therefore confirm the position. The experimental results demonstrate that the algorithm with single anchor outperforms the algorithm with received signal strength indicator due to the good character of discrimination;its mean accuracy can reach 0. 95 m.%为了满足室内高精度定位的需求，采用无线局域网物理层细粒度的信道状态信息来建立一个使用信号强度层次化排序集合的单信标定位算法。算法利用室内多径效应导致不同信道接收到的信道状态信息值不同的特性，来建立不同信道之间关系的指纹库，从而确定一个位置。实验结果表明仅仅使用单个信标的信道状态信息值的指纹定位算法的定位性能明显好于使用接收信号强度的定位算法，平均定位精度可以达到0．95 m。