Bluetooth based motion detection systems
First Claim
1. An apparatus, comprising:
- one or more transceivers configured to receive wireless signals from a transmitting device via a plurality of receive antennas;
one or more processors; and
a memory comprising instructions that, when executed by the one or more processors, cause the apparatus to;
receive, from the transmitting device, a reference packet containing a reference sequence;
determine phase differences between signal components of the reference sequence arriving via the plurality of receive antennas;
determine a reference angle based at least in part on the determined phase differences;
receive, from the transmitting device, a wireless signal via the plurality of receive antennas, the wireless signal including a packet containing a sequence known by the apparatus;
determine phase differences between signal components of the sequence arriving via the plurality of receive antennas;
determine at least one of an angle of arrival (AoA) or an angle of departure (AoD) of the packet based at least in part on the determined phase differences;
determine a difference between at least one of the AoA or the AoD and the reference angle; and
detect a presence or absence of motion of an object other than the apparatus or the transmitting device in the vicinity of the apparatus and the transmitting device based on the determined difference.
1 Assignment
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Accused Products
Abstract
This disclosure provides systems, methods and apparatuses for detecting motion based on wireless signals. In some implementations, a receiving device may receive, from a transmitting device, a packet containing a sequence. In some aspects, the packet may be a Bluetooth packet, and the sequence may be contained in a supplemental information appended to the Bluetooth packet. The receiving device may estimate angle information of the packet based on the sequence, and determine a difference between the estimated angle information and a reference angle. The angle information may be an angle of arrival (AoA) or an angle of departure (AoD) of the packet. The receiving device may detect motion based on the determined difference.
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Citations
26 Claims
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1. An apparatus, comprising:
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one or more transceivers configured to receive wireless signals from a transmitting device via a plurality of receive antennas; one or more processors; and a memory comprising instructions that, when executed by the one or more processors, cause the apparatus to; receive, from the transmitting device, a reference packet containing a reference sequence; determine phase differences between signal components of the reference sequence arriving via the plurality of receive antennas; determine a reference angle based at least in part on the determined phase differences; receive, from the transmitting device, a wireless signal via the plurality of receive antennas, the wireless signal including a packet containing a sequence known by the apparatus; determine phase differences between signal components of the sequence arriving via the plurality of receive antennas; determine at least one of an angle of arrival (AoA) or an angle of departure (AoD) of the packet based at least in part on the determined phase differences; determine a difference between at least one of the AoA or the AoD and the reference angle; and detect a presence or absence of motion of an object other than the apparatus or the transmitting device in the vicinity of the apparatus and the transmitting device based on the determined difference. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of motion detection using wireless signals, the method performed by a receiving device and comprising:
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receive, from a transmitting device, a reference packet containing a reference sequence; determine phase differences between signal components of the reference sequence arriving via a plurality of receive antennas; determine a reference angle based at least in part on the determined phase differences; receiving, from the transmitting device via the plurality of receive antennas, a packet containing a sequence known by the receiving device; determining phase differences between signal components of the sequence arriving via the plurality of receive antennas; determining at least one of an angle of arrival (AoA) or an angle of departure (AoD) of the packet based at least in part on the determined phase differences; determining a difference between at least one of the AoA or the AoD and the reference angle; and detecting a presence or absence of motion of an object other than the receiving device or the transmitting device in the vicinity of the receiving device and the transmitting device based on the determined difference. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a receiving device, cause the receiving device to perform operations comprising:
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receiving, from a transmitting device, a reference packet containing a reference sequence; determine phase differences between signal components of the reference sequence arriving via a plurality of receive antennas; determine a reference angle based at least in part on the determined phase differences; receiving, from the transmitting device via the plurality of receive antennas, a packet containing a sequence known by the receiving device; determining phase differences between signal components of the sequence arriving via the plurality of receive antennas; determining at least one of an angle of arrival (AoA) or an angle of departure (AoD) of the packet based at least in part on the determined phase differences; determining a difference between at least one of the AoA or the AoD and the reference angle; and detecting a presence or absence of motion of an object other than the receiving device or the transmitting device in the vicinity of the receiving device and the transmitting device based on the determined difference. - View Dependent Claims (16, 17, 18, 19)
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20. A receiving device, comprising:
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means for receiving, from a transmitting device, a reference packet containing a reference sequence; means for determining phase differences between signal components of the reference sequence arriving via a plurality of receive antennas; means for determining a reference angle based at least in part on the determined phase differences; means for receiving, from the transmitting device via the plurality of receive antennas, a packet containing a sequence known by the receiving device; means for determining phase differences between signal components of the sequence arriving via the plurality of receive antennas; means for determining at least one of an angle of arrival (AoA) or an angle of departure (AoD) of the packet based at least in part on the determined phase differences; means for determining a difference between at least one of the AoA or the AoD and the reference angle; and means for detecting a presence or absence of motion of an object other than the receiving device or the transmitting device in the vicinity of the receiving device and the transmitting device based on the determined difference. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification