Navigation system
First Claim
1. A method of determining the location of a target, comprising:
- initializing a plurality of base stations to determine their relative location to each other;
measuring, at the target, the time of arrival of at least one signal from each of the plurality of base stations;
calculating directly the location of the target relative to the plurality of base stations using a closed solution, where the plurality of base stations is at 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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Accused Products
Abstract
The present invention relates to a method of determining the location of a target. The method includes initializing a set of base stations to determine their location relative to each other. At the target, 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 target 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.
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Citations
20 Claims
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1. A method of determining the location of a target, comprising:
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initializing a plurality of base stations to determine their relative location to each other;
measuring, at the target, the time of arrival of at least one signal from each of the plurality of base stations;
calculating directly the location of the target relative to the plurality of base stations using a closed solution, where the plurality of base stations is at 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)
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17. A system for determining the location of a receiver, comprising:
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at least three base stations and at least one target for a TOA technique and at least four base stations and a target for a TDOA technique, each base station comprising at least one GHF UWB transmitter, wherein at least one base station and the target are mobile and wherein the target is capable of calculating its location using a closed form solution based. - View Dependent Claims (18, 19, 20)
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Specification