发明名称 |
Positioning mobile terminal based on electromagnetic signals |
摘要 |
Example positioning techniques include: generating an initial particle set, randomly allocating different moving step lengths for each particle in the initial particle set, updating position information of each particle at a previous moment to obtain a current particle set, rating usability of each particle according to position information of each particle in the current particle set and a signal fingerprint received at a current moment, acquiring a moving step length of each particle having a rating higher than a first predetermined threshold in the current particle set, and updating a moving step length of each particle having a rating lower than the first predetermined threshold according to the acquired moving step length. The techniques of the present disclosure obtain a moving step length closest to the actual step length of a person, and update the moving step length in time with the change of the step length of the person. |
申请公布号 |
US9532170(B2) |
申请公布日期 |
2016.12.27 |
申请号 |
US201514863877 |
申请日期 |
2015.09.24 |
申请人 |
Alibaba Group Holding Limited |
发明人 |
Shen Hui;Yao Yunjiao;Qian Xiao;Ma Hanbo;Zhang Zhipeng |
分类号 |
H04W4/02;H04M3/42;H04W64/00;H04W88/02 |
主分类号 |
H04W4/02 |
代理机构 |
Lee & Hayes, PLLC |
代理人 |
Lee & Hayes, PLLC |
主权项 |
1. A method comprising:
matching a signal fingerprint of an electromagnetic signal received by a mobile terminal with signal fingerprints in a pre-generated signal fingerprint map at an initial positioning moment; generating a particle set according to a matching result; randomly allocating different moving step lengths for each particle in the initial particle set; updating position information of each particle in the particle set to obtain a current particle set according to a moving step number and a moving direction, detected by the mobile terminal at a current moment, and a moving step length of each particle; rating usability of each particle according to position information of each particle in the current particle set and a signal fingerprint received at the current moment; acquiring one or more moving step lengths of one or more particles having a rating higher than a first rating threshold in the current particle set; updating one or more moving step lengths of another one or more particle having a rating lower than the first rating threshold according to the acquired moving step length; and determining a position of the mobile terminal based at least on the updated position information of a particle in the particle set; wherein a respective particle represents at least one of a candidate of position information, a direction, and a step length of the mobile terminal. |
地址 |
Grand Cayman KY |