Method and apparatus for aiding positioning of a satellite positioning system and receiver
First Claim
Patent Images
1. In a satellite positioning system (SPS) receiver, a method comprising the steps of:
- measuring a distance between the SPS receiver and a transmission source according to a radio frequency (RF) signal transmitted by the transmission source;
calculating an approximate location on Earth from the distance and a location of the transmission source; and
determining a location fix of the SPS receiver on Earth using the approximate location.
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Abstract
A satellite positioning system (SPS) receiver (104) operates according to a method (200) having the steps of measuring (201) a distance between the SPS receiver and a transmission source (301) according to a radio frequency (RF) signal transmitted by the transmission source, calculating (212) an approximate location on Earth from the distance and a location of the transmission source, and determining (214) a location fix of the SPS receiver on Earth using the approximate location. Other method and apparatus embodiments are disclosed.
22 Citations
20 Claims
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1. In a satellite positioning system (SPS) receiver, a method comprising the steps of:
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measuring a distance between the SPS receiver and a transmission source according to a radio frequency (RF) signal transmitted by the transmission source;
calculating an approximate location on Earth from the distance and a location of the transmission source; and
determining a location fix of the SPS receiver on Earth using the approximate location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A satellite positioning system (SPS) receiver having a computer-readable storage medium, the storage medium comprising computer instructions for:
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measuring a distance between the SPS receiver and a transmission source according to a radio frequency (RF) signal transmitted by the transmission source;
calculating an approximate location on Earth from the distance and a location of the transmission source; and
determining a location fix of the SPS receiver on Earth using the approximate location. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A selective call radio (SCR), comprising:
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a radio transceiver for exchanging messages with a communication system;
an SPS receiver for locating the SCR on Earth;
a display for conveying images to a user of the SCR;
an audio system for conveying audible signals to the user of the SCR;
a memory; and
a processor for controlling operations of the memory, the radio transceiver and the SPS receiver, wherein the processor is programmed to;
measure from the radio transceiver a distance between the SCR and a transmission source of the communication system according to a radio frequency (RF) signal transmitted by the transmission source;
calculate an approximate location on Earth from the distance and a location of the transmission source; and
cause the SPS receiver to determine a location fix of the SCR on Earth using the approximate location. - View Dependent Claims (18, 19, 20)
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Specification