Navigation unit and base station
First Claim
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1. A navigation unit comprising:
- a transceiver for transmitting and receiving ultra wideband signals,a central processing unit for performing operations,a power source for powering the transceiver and the central processing unit, andsoftware stored on and executed by the central processing unit for diagnosing and managing the navigation unit, and for calculating position of the navigation unit using range measurements to and between a plurality of base stations, wherein the plurality of base stations is initialized to determine their relative locations to each other in a coordinate system wherein, during initializing, a first base station of the plurality of base stations sends an ultra wideband signal to a second base station and a third base station of the plurality of base stations to determine a distance between the first base station and the second base station and a distance between the first base station and the third base station and wherein the second base station sends an ultra wideband signal to the third base station to determine a distance between the second base station and the third base station;
determining the range measurements, at the navigation unit, by measuring the time of arrival of at least one ultra wideband signal from each of the plurality of base stations;
calculating directly the location of the navigation unit relative to the plurality of base stations, where the plurality of base stations is at least three when a time of arrival technique is used and wherein the plurality of base stations is at least four when a time difference of arrival technique is used.
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Abstract
The present invention relates to a navigation unit and base station used for determining location. A plurality of base stations are initialized to determine their location relative to each other. At the navigation unit, the time of arrival of at least one signal from each of the plurality of base stations is measured. From this, the location of the navigation unit relative to the plurality of base stations may be directly calculated using a closed solution. In one embodiment, a time of arrival technique is used and in another embodiment a time difference of arrival technique is used. Preferably an ultra-wide band frequency is utilized.
126 Citations
38 Claims
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1. A navigation unit comprising:
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a transceiver for transmitting and receiving ultra wideband signals, a central processing unit for performing operations, a power source for powering the transceiver and the central processing unit, and software stored on and executed by the central processing unit for diagnosing and managing the navigation unit, and for calculating position of the navigation unit using range measurements to and between a plurality of base stations, wherein the plurality of base stations is initialized to determine their relative locations to each other in a coordinate system wherein, during initializing, a first base station of the plurality of base stations sends an ultra wideband signal to a second base station and a third base station of the plurality of base stations to determine a distance between the first base station and the second base station and a distance between the first base station and the third base station and wherein the second base station sends an ultra wideband signal to the third base station to determine a distance between the second base station and the third base station; determining the range measurements, at the navigation unit, by measuring the time of arrival of at least one ultra wideband signal from each of the plurality of base stations; calculating directly the location of the navigation unit relative to the plurality of base stations, where the plurality of base stations is at least three when a time of arrival technique is used and wherein the plurality of base stations is at least four when a time difference of arrival technique is used. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A base station comprising:
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a transceiver for transmitting and receiving ultra wideband signals, a central processing unit for performing operations, a power source for powering the transceiver and the central processing unit, and software stored on and executed by the central processing unit for diagnosing and managing the base station, wherein the base station transmits range measurements to one of a plurality of base stations or one or more navigation units, wherein the plurality of base stations is initialized to determine their relative locations to each other in a coordinate system wherein, during initializing, the base station sends an ultra wideband signal to a second base station and a third base station of the plurality of base stations to determine a distance between the base station and the second base station and a distance between the base station and the third base station and wherein the second base station sends an ultra wideband signal to the third base station to determine a distance between the second base station and the third base station; determining the range measurements, at the base station, by measuring the time of arrival of at least one ultra wideband signal from each of the plurality of base stations; and transmitting, at the base station, the range measurement to the requesting base station or navigation unit. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification
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Current AssigneeHailo Technologies, LLC (2S Ventures, LLC)
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Original AssigneeNAV-Track, Inc.
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InventorsCheok, Ka C., Smid, Gert Edzko, Fleck, Paul W., Stiglich, Thomas P.
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Primary Examiner(s)EL CHANTI, HUSSEIN A
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Application NumberUS12/053,208Publication NumberTime in Patent Office1,565 DaysField of Search701/200, 701/207, 701213-215, 701/470US Class Current701/470CPC Class CodesG01S 5/0284 Relative positioningG01S 5/0289 of multiple transceivers, e...
