发明名称 |
Terminal device, positioning method, and recording medium |
摘要 |
A terminal device includes a plurality of search channel sections which search for a positioning satellite, a candidate reception frequency calculation section which calculates a candidate reception frequency of a first acquisition target satellite by causing the search channel sections to perform the correlation accumulation process for a first accumulation time, a candidate frequency confirmation section which confirms reliability of the candidate reception frequency by causing the search channel sections to perform the correlation accumulation process for a second accumulation time longer than the first accumulation time, a final frequency calculation section which calculates a final frequency by causing the search channel sections to perform the correlation accumulation process for a third accumulation time longer than the second accumulation time, and a first difference calculation section which calculates a difference between an estimated synchronization frequency corresponding to each first acquisition target satellite and the final frequency.
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申请公布号 |
US7679558(B2) |
申请公布日期 |
2010.03.16 |
申请号 |
US20070808687 |
申请日期 |
2007.06.12 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
IMAFUKU SHIGERU;NAGAHARA MIKIO;MIZUOCHI SHUNICHI;HAYASHI AKIFUMI;KURATA TOMOYUKI |
分类号 |
G01S1/00;G01S19/29;G01S19/24;G01S19/37 |
主分类号 |
G01S1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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