| 发明名称 |
Location estimation system, method and program |
| 摘要 |
A location estimation method using label propagation. The achieved location estimation method is robust to variations in radio signal strengths and is highly accurate by using the q-norm (0<q<1), especially, for calculating the similarities among radio signal strength vectors. The accuracy in location estimation is further improved by putting more importance on the time-series similarities. Specifically, the time-series similarity is calculated by using time-series values indicating the temporal order of radio signal strengths during the measurement. If the time-series similarity is larger than the similarity between the radio signal strength vectors, the time-series similarity is preferentially used. The exponential attenuation function can also be used for calculating the similarities, instead of the q norm (0<q<1). |
| 申请公布号 |
US8138974(B2) |
申请公布日期 |
2012.03.20 |
| 申请号 |
US20080257437 |
申请日期 |
2008.10.24 |
| 申请人 |
HIDO SHOHEI;IDE TSUYOSHI;KASHIMA HISASHI;SUZUKI SHOKO;TAJIMA AKIRA;TAKAHASHI RIKIYA;TAKAHASHI TOSHIHIRO;TSUBOI YUTA;INTERNATIONAL BUSINES MACHINES CORPORATION |
发明人 |
HIDO SHOHEI;IDE TSUYOSHI;KASHIMA HISASHI;SUZUKI SHOKO;TAJIMA AKIRA;TAKAHASHI RIKIYA;TAKAHASHI TOSHIHIRO;TSUBOI YUTA |
| 分类号 |
G01S5/02;G01S3/02 |
主分类号 |
G01S5/02 |
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