GPS reception system
First Claim
1. A GPS reception system having a GPS receiver having a built-in antenna and an external antenna made connectable to the GPS receiver, the system characterized by comprising an antenna switching unit which switches between the built-in antenna and the external antenna, and, when the external antenna is connected to the GPS receiver, switches a receiving antenna from the built-in antenna to the external antenna.
1 Assignment
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Accused Products
Abstract
A GPS reception system is provided in which, when sufficient reception level for positioning cannot be obtained only by a built-in antenna, a reception antenna is switched from the built-in antenna to the external antenna.
A GPS reception system has a GPS receiver 2 having a built-in antenna 3 and an external antenna 8 made connectable to the GPS receiver 2. The GPS reception system 1 further has an antenna switching unit 4 which switches between the built-in antenna 3 and the external antenna 8, and, when the external antenna 8 is connected to the GPS receiver 2, switches a receiving antenna from the built-in antenna 3 to the external antenna 8.
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Citations
9 Claims
- 1. A GPS reception system having a GPS receiver having a built-in antenna and an external antenna made connectable to the GPS receiver, the system characterized by comprising an antenna switching unit which switches between the built-in antenna and the external antenna, and, when the external antenna is connected to the GPS receiver, switches a receiving antenna from the built-in antenna to the external antenna.
- 6. A GPS reception system comprising a GPS receiver having a built-in antenna and an external antenna made connectable to the GPS receiver, the system characterized by comprising a reception level detecting unit which measures a reception level of the built-in antenna and that of the external antenna and compares the measured reception levels with each other, and an antenna switching control unit which selects a reception antenna from measurement and comparison results of the reception levels obtained in the reception level detecting unit and carries out control of switching between the built-in antenna and the external antenna, and carrying out diversity reception with the built-in antenna and the external antenna.
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9. A GPS reception system comprising a GPS receiver having a built-in antenna and an external antenna made connectable to the GPS receiver, the system characterized by comprising a reception level detecting unit which measures a reception level of the built-in antenna and that of the external antenna and compares the measured reception levels with each other, and an antenna switching control unit which selects a reception antenna from measurement and comparison results of the reception levels obtained in the reception level detecting unit and carries out control of switching between the built-in antenna and the external antenna, and, of the built-in antenna or the external antenna, designating an antenna which provides a higher reception level as the reception antenna for each of the GPS satellites picked up.
Specification