发明名称 |
Mobile handset with position calculation function |
摘要 |
To extend the areas where a mobile handset can determine its position using radio waves, the present invention provides a mobile handset that is equipped with both position calculation means using radio waves from GPS satellites and position calculation means using RF carriers from cellular base stations. Positioning results obtained from both of these position calculation means are combined and weighted with GPS positioning reliability and cellular positioning reliability, respectively. A weighted mean of these results is then output as a final position calculation result.
|
申请公布号 |
US6928292(B2) |
申请公布日期 |
2005.08.09 |
申请号 |
US20020094980 |
申请日期 |
2002.03.12 |
申请人 |
HITACHI, LTD. |
发明人 |
TSUNEHARA KATSUHIKO;KUWAHARA MIKIO |
分类号 |
G01S5/02;G01S5/10;G01S19/12;G01S19/48;H04W64/00;(IPC1-7):H04Q7/20 |
主分类号 |
G01S5/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|