Method and apparatus for selecting optimal satellites in global positioning system
First Claim
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1. A method of selecting GPS (Global Positioning System) satellites to locate an object using a GPS receiver, comprising:
- making a satellite list including the coordinates of satellites visible in the GPS receiver;
calculating redundancies indicating respectively the degree that the satellites are overlapped with other satellites included in the satellite list using the coordinates of satellites and eliminating one satellite having a maximum redundancy from the satellite list; and
assigning channels of the GPS receiver to an intended number of satellites if the intended number of satellites remain in the satellite list and, if not, repeating the calculating step.
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Abstract
An apparatus and method for selecting optimal GPS satellites to locate an object. A satellite list including the coordinates of satellites is made, the redundancies of the satellites are calculated, at least one satellite having a maximum redundancy is eliminated from the satellite list, and channels of a GPS receiver are assigned to an intended number of satellites if the intended number of satellites remain in the satellite list.
36 Citations
11 Claims
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1. A method of selecting GPS (Global Positioning System) satellites to locate an object using a GPS receiver, comprising:
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making a satellite list including the coordinates of satellites visible in the GPS receiver;
calculating redundancies indicating respectively the degree that the satellites are overlapped with other satellites included in the satellite list using the coordinates of satellites and eliminating one satellite having a maximum redundancy from the satellite list; and
assigning channels of the GPS receiver to an intended number of satellites if the intended number of satellites remain in the satellite list and, if not, repeating the calculating step. - View Dependent Claims (2, 3, 4, 5)
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6. A method of selecting GPS (Global Positioning System) satellites to locate an object using a GPS receiver, comprising:
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making a satellite list including the coordinates of satellites visible in the GPS receiver;
calculating redundancies indicating respectively the degree that the satellite are overlapped with other satellites included in the satellite list using the coordinates of satellites;
updating the satellite list by eliminating from the satellite list one satellite having a maximum redundancy;
repeating the redundancy calculating step and the satellite list updating step for the satellite list until an intended number of satellites remain in the satellite list; and
assigning channels of the GPS receiver to the intended number of satellites. - View Dependent Claims (7)
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8. An apparatus for selecting GPS (Global Positioning System) satellites to locate an object using a GPS receiver, comprising:
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an RF (Radio Frequency) unit for receiving RF signals on channels assigned to GPS satellites;
a digital unit for processing the received RF signals;
a processor unit for selecting satellites to which the channels are assigned and calculating a navigational solution using the processed signals; and
a memory for storing an operating program executed in the processor unit, wherein the processor unit makes a satellite list including the coordinates of satellites visible in the GPS receiver, calculates redundancies indicating respectively the degree that the satellites are overlapped with other satellites included in the satellite list using the coordinate of satellite and, eliminates one satellite having a maximum redundancy from the satellite list, and assigns the channels of the GPS receiver to an intended number of satellites if the intended number of satellites remain in the satellite list. - View Dependent Claims (9, 10, 11)
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Specification