During the off-line phase, the system tabulates the signal strength received from the access points, stores fingerprint information and establish the model;

离线阶段，通过在参考点上测量信号得到信号覆盖图，建立模型并存储位置指纹信息；

youdao

During the off-line phase, the system tabulates the signal strength received from the access points, stores fingerprint information and establish the model;

离线阶段，通过在参考点上测量信号得到信号覆盖图，建立模型并存储位置指纹信息；

youdao