发明授权
- 专利标题： Terminal apparatus, positioning method, control program for terminal apparatus, and computer readable recording medium having recorded therein control program for terminal apparatus
- 专利标题（中）： 终端装置，定位方法，终端装置的控制程序，以及记录有终端装置的控制程序的计算机可读记录介质
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申请号： US12418883申请日： 2009-04-06
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公开(公告)号： US07812764B2公开(公告)日： 2010-10-12
- 发明人: Shunichi Mizuochi , Akifumi Hayashi
- 申请人： Shunichi Mizuochi , Akifumi Hayashi
- 申请人地址： JP Tokyo
- 专利权人： Seiko Epson Corporation
- 当前专利权人： Seiko Epson Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Global IP Counselors, LLP
- 优先权： JP2004-144875 20040514
- 主分类号： G01S1/00
- IPC分类号： G01S1/00
摘要：
A terminal apparatus includes a control unit and a positioning device. The control unit determines a first satellite-to-be-acquired from among a plurality of SPS satellites, and generates an initial search frequency for the first satellite-to-be-acquired. The positioning device has a plurality of search units, and is configured to acquire the first satellite-to-be-acquired using the plurality of search units. The control unit determines first difference information, which is a difference between the initial search frequency and the frequency at which the first satellite-to-be-acquired is acquired. The control unit generates corrected search frequencies for other SPS satellites, using the first difference information. The positioning device acquires other necessary SPS satellites using the corresponding corrected search frequencies. The terminal apparatus can acquire SPS satellites accurately even when there has been a frequency shift in the terminal apparatus since the last positioning.
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