LOCATION SYSTEMS FOR HANDHELD ELECTRONIC DEVICES
First Claim
1. A portable electronic device, comprising:
- a global navigation satellite system receiver that produces satellite location data from received satellite signals;
an accelerometer that detects movement of the portable electronic device and that produces corresponding accelerometer signals; and
processing circuitry that computes where the portable electronic device is geographically located based on the satellite location data and the accelerometer signals.
1 Assignment
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Accused Products
Abstract
An electronic device such as a portable electronic device is provided. The device may have wireless circuitry such as a global satellite navigation system receiver for receiving global satellite navigation system signals and for producing corresponding global satellite navigation system data. The global satellite navigation system data may include information on the current position of the portable electronic device. The portable electronic device may also have one or more sensors that are used to gather data in addition to the global satellite navigation system data. The sensors may include accelerometers and other devices capable of determining how the portable electronic device is oriented with respect to the Earth'"'"'s magnetic field and how the device is being moved. When the device is moved, the movement and resulting change in orientation may be used in conjunction with the global satellite navigation system data to compute a current geographic location.
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Citations
20 Claims
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1. A portable electronic device, comprising:
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a global navigation satellite system receiver that produces satellite location data from received satellite signals; an accelerometer that detects movement of the portable electronic device and that produces corresponding accelerometer signals; and processing circuitry that computes where the portable electronic device is geographically located based on the satellite location data and the accelerometer signals. - View Dependent Claims (2, 3, 4, 5)
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6. A method of using a portable electronic device that has a global navigation satellite system receiver and at least one sensor that is sensitive to movement of the portable electronic device and that is separate from the global navigation satellite system receiver, comprising:
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with the global satellite system receiver, receiving satellite signals from navigation satellites and producing corresponding global satellite system receiver data; with the sensor, gathering sensor data in response to movement of the portable electronic device; and with processing circuitry in the portable electronic device, processing both the global satellite system receiver data and the gathered sensor data to produce output data. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. Circuitry in a portable electronic device comprising:
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an antenna; a global satellite navigation system receiver coupled to the antenna that receives satellite navigation signals and that produces corresponding global satellite navigation system receiver location data; an accelerometer that produces accelerometer data in response to movement of the portable electronic device; and processing circuitry that computes the portable electronic device'"'"'s current geographic location based on both the global satellite navigation system receiver location data and the accelerometer data. - View Dependent Claims (19, 20)
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Specification