Determining relative position with a BLE beacon
First Claim
1. A location reference system, comprising:
- a beacon comprising a plurality of co-located antennas, including a first antenna that selectively transmits a directional reference signal, and a second antenna that omnidirectionally transmits a ranging reference signal;
a controller; and
a memory in communication with the controller, the memory being programmed with instructions executable by the controller to compare data gathered from the first antenna and the second antenna to determine a position of a receiver.
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Accused Products
Abstract
A beacon uses a plurality of co-located, unidirectional antennas each to transmit angular and/or ranging reference signals from substantially the same point. In some embodiments, two such antennas transmit the reference signals in substantially opposite directions, and in some embodiments four such antennas transmit in directions that are substantially at right angles to each other. In some embodiments, the transmitted signals overlap so they can be received at a single receiver. Some implementations include a receiver that interprets the reference signals from two or more of the co-located antennas to determine the direction of the receiver is in relative to the beacon or the location of the receiver relative to the beacon. Another implementation uses an omnidirectional antenna to provide ranging information and a rotating, unidirectional antenna to provide directional information. In some of these implementations, the antennas are co-located, while in others, they are separated in space.
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Citations
20 Claims
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1. A location reference system, comprising:
- a beacon comprising a plurality of co-located antennas, including a first antenna that selectively transmits a directional reference signal, and a second antenna that omnidirectionally transmits a ranging reference signal;
a controller; and
a memory in communication with the controller, the memory being programmed with instructions executable by the controller to compare data gathered from the first antenna and the second antenna to determine a position of a receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a beacon comprising a plurality of co-located antennas, including a first antenna that selectively transmits a directional reference signal, and a second antenna that omnidirectionally transmits a ranging reference signal;
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11. A method of providing location reference signals, comprising the steps of:
- transmitting a first reference signal from a first antenna, the first reference signal being a directional reference signal;
transmitting a second reference signal from a second antenna, the second antenna being substantially co-located with the first antenna; and
processing data gathered from the first reference signal with data gathered from the second reference signal to determine a position of a receiver. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
- transmitting a first reference signal from a first antenna, the first reference signal being a directional reference signal;
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19. A location reference system, comprising:
- a controller;
a beacon comprising an omnidirectional antenna and a unidirectional antenna, the omnidirectional antenna transmitting a ranging reference signal, and the unidirectional antenna being selectively activatable to transmit a directional reference signal; and
a memory in communication with the controller, the memory being programmed with instructions executable by the controller to activate the unidirectional antenna when the omnidirectional antenna detects the presence of a receiver. - View Dependent Claims (20)
- a controller;
Specification