TERMINAL APPARATUS, POSITIONING METHOD, CONTROL PROGRAM FOR TERMINAL APPARATUS, AND COMPUTER READABLE RECORDING MEDIUM HAVING RECORDED THEREIN CONTROL PROGRAM FOR TERMINAL APPARATUS
First Claim
1. A terminal apparatus that is configured to receive position related information signals from a plurality of SPS satellites, the terminal apparatus comprising:
- a control unit configured to determine a first satellite-to-be-acquired from among the plurality of SPS satellites, and to generate a first initial search frequency for the first satellite-to-be-acquired; and
a positioning device having a plurality of search units, the positioning device being configured to acquire the first satellite-to-be-acquired using the plurality of search units,whereinthe control unit is further configured to determine first difference information, which is a difference between the first initial search frequency and the frequency at which the first satellite-to-be-acquired is acquired,the control unit is further configured to generate, using the first difference information, corrected search frequencies for at least some of the plurality of SPS satellites excluding the first satellite-to-be-acquired, andthe positioning device is further configured to acquire at least another position information satellite using the corresponding corrected search frequency.
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Abstract
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.
39 Citations
1 Claim
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1. A terminal apparatus that is configured to receive position related information signals from a plurality of SPS satellites, the terminal apparatus comprising:
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a control unit configured to determine a first satellite-to-be-acquired from among the plurality of SPS satellites, and to generate a first initial search frequency for the first satellite-to-be-acquired; and a positioning device having a plurality of search units, the positioning device being configured to acquire the first satellite-to-be-acquired using the plurality of search units, wherein the control unit is further configured to determine first difference information, which is a difference between the first initial search frequency and the frequency at which the first satellite-to-be-acquired is acquired, the control unit is further configured to generate, using the first difference information, corrected search frequencies for at least some of the plurality of SPS satellites excluding the first satellite-to-be-acquired, and the positioning device is further configured to acquire at least another position information satellite using the corresponding corrected search frequency.
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Specification