PORTABLE ELECTRONIC DEVICE WITH RADIOFREQUENCY SIGNAL RECEIVER AND METHOD FOR DETERMINING THE POSITION OF THE SAME
First Claim
1. A portable electronic device to be worn on a user'"'"'s wrist, the device comprising:
- (a) a radiofrequency signal receiver that includes i. means for receiving and shaping radiofrequency signals from satellites and several correlation channels for searching for and tracking several visible satellites;
ii. a magnetic compass;
iii. a microprocessor data processing unit for processing data provided by the receiver and the compass; and
iv. storage means in which almanac and ephemeredes data relating to satellites are stored, wherein the compass is arranged to provide an orientation signal to the data processing unit that controls means for indicating a direction for indicating to the user a preferred orientation for searching for visible satellites when the device is in a reading position on the basis of processing, by the processing unit, of almanac and ephemeredes data, time data and the orientation signal.
1 Assignment
0 Petitions
Accused Products
Abstract
The portable electronic device, preferably a wristwatch, includes a radiofrequency signal receiver for receiving, in particular, GPS signals via an antenna, a magnetic compass, a microprocessor data processing unit for processing data provided by the receiver and the compass, and storage means in which almanac and ephemeredes data relating to satellites is stored. The compass is arranged for provide an orientation signal to the data processing device. In this manner, the unit can control means for indicating a direction to indicate a preferred orientation for searching for satellites visible to the user in a reading position of the watch. These indicating means can be formed by the time indicating hands moved above a watch dial. The preferred orientation is calculated by the processing unit on the basis of the almanac and ephemeredes data, time data and the orientation signal.
23 Citations
14 Claims
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1. A portable electronic device to be worn on a user'"'"'s wrist, the device comprising:
(a) a radiofrequency signal receiver that includes i. means for receiving and shaping radiofrequency signals from satellites and several correlation channels for searching for and tracking several visible satellites;
ii. a magnetic compass;
iii. a microprocessor data processing unit for processing data provided by the receiver and the compass; and
iv. storage means in which almanac and ephemeredes data relating to satellites are stored, wherein the compass is arranged to provide an orientation signal to the data processing unit that controls means for indicating a direction for indicating to the user a preferred orientation for searching for visible satellites when the device is in a reading position on the basis of processing, by the processing unit, of almanac and ephemeredes data, time data and the orientation signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 14)
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9. A method for determining a position using an electronic device worn on a user'"'"'s wrist, the device comprising a radiofrequency receiver that includes means for receiving and shaping radiofrequency signals from satellites and several correlation channels for searching for and tracking visible satellites, a magnetic compass, a microprocessor data processing unit for processing data provided by the receiver and the compass, and storage means in which almanac and ephemeredes data relating to satellites is stored, wherein the method includes steps of:
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(a) providing an orientation signal from the compass to the processing unit;
(b) processing the orientation signal in the processing unit with the almanac and ephemeredes data of the storage means, and time data; and
(c) indicating on direction indicating means that is controlled by the processing unit, a preferred orientation for searching for satellites visible to the user when the device is in a reading position on the basis of data processed by the processing unit. - View Dependent Claims (10, 11, 12, 13)
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Specification