Location information within an area defined by a grid of radio-frequency tag circuits
First Claim
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1. A system for determining a location within an area using a grid of radio-frequency (RF) tag circuits, comprising:
- a plurality of RF exciters, wherein;
the plurality of RF exciters are permanently placed within the area;
the plurality of RF exciters are fixed in relation to the grid of RF tag circuits; and
the plurality of RF exciters are configured to emit unmodulated RF energy;
the grid of RF tag circuits arranged along a bottom surface of the area and configured to;
receive the unmodulated RF energy from one or more of the plurality of RF exciters; and
emit modulated RF energy upwards in a direction away from the bottom surface toward a mobile device, where each RF tag circuit stores information associated with a location of the RF tag circuit within the area; and
the mobile device, wherein;
the mobile device is a smart phone;
the mobile device receives the modulated RF energy;
the mobile device determines a position of the mobile device based on receiving the modulated RF energy;
the mobile device is mobile in relation to the RF tag circuits;
the mobile device is separate from the plurality of RF exciters; and
the modulated RF energy emitted from each RF tag circuit carries the information.
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Abstract
A system for determining a location within an area defined by a grid of radio-frequency (RF) tag circuits includes RF exciters that are configured to emit unmodulated RF energy. The grid of the RF tag circuits are configured to receive the unmodulated RF energy from one or more of the RF exciters and to emit modulated RF energy. Each RF tag circuit may store information associated with a location of the RF tag circuit within the area and the modulated RF energy emitted from each RF tag circuit may carry the information.
20 Citations
16 Claims
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1. A system for determining a location within an area using a grid of radio-frequency (RF) tag circuits, comprising:
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a plurality of RF exciters, wherein; the plurality of RF exciters are permanently placed within the area; the plurality of RF exciters are fixed in relation to the grid of RF tag circuits; and the plurality of RF exciters are configured to emit unmodulated RF energy; the grid of RF tag circuits arranged along a bottom surface of the area and configured to; receive the unmodulated RF energy from one or more of the plurality of RF exciters; and emit modulated RF energy upwards in a direction away from the bottom surface toward a mobile device, where each RF tag circuit stores information associated with a location of the RF tag circuit within the area; and the mobile device, wherein; the mobile device is a smart phone; the mobile device receives the modulated RF energy; the mobile device determines a position of the mobile device based on receiving the modulated RF energy; the mobile device is mobile in relation to the RF tag circuits; the mobile device is separate from the plurality of RF exciters; and the modulated RF energy emitted from each RF tag circuit carries the information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for providing location information within an area using a grid of radio-frequency (RF) tag circuits, the method comprising:
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receiving unmodulated RF energy at each of the RF tag circuits from one or more RF exciters, where; the one or more RF exciters are permanently placed within the area; the plurality of RF exciters are fixed in relation to the grid of RF tag circuits; the unmodulated RF energy provides power for each of the RF tag circuits; and the RF tag circuits are arranged along a bottom surface of the area; and emitting modulated RF energy from each of the RF tag circuits upwards in a direction away from the bottom surface toward a mobile device, where; the mobile device is a smart phone; the mobile device is mobile in relation to the grid of RF tag circuits; the mobile device receives the modulated RF energy; the mobile device determines a position of the mobile device based on receiving the modulated RF energy; the mobile device is separate from the plurality of RF exciters; each RF tag circuit stores information associated with a location of the RF tag circuit within the area; and the modulated RF energy emitted from each RF tag circuit carries the information associated with the location of the RF tag circuit within the area. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification