Detection of device motion and nearby object motion
First Claim
1. A method for detecting motion with a device, comprising:
- determining, at the device, one or more parameters indicative of a change in fading experienced by a wireless signal received by the device, wherein the determining the one or more parameters include;
determining a fading profile indicative of how the wireless signal received by the device experiences fading at the device, anddetermining a second fading profile indicative of how a second wireless signal received by the device experiences fading at the device, wherein the one or more parameters are indicative of one or more differences between the fading profile and the second fading profile;
determining, based on the one or more parameters indicative of the change in fading, whether a first of the device and an object in an environment of the device is moving; and
responsive to a determination that the first of the device and the object is not moving, determining, based on the one or more parameters indicative of the change in fading, whether a second of the device and the object is moving, wherein a change in fading when the device is moving is greater than a change in fading when the device is stationary and the object is moving.
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Accused Products
Abstract
In accordance with various aspects of the disclosure, a system, method, and device for detecting motion based on channel fading characteristics are presented. One or more packets may be received wirelessly from a wireless transmitter. A fading profile may be determined for each packet. From the plurality of fading profiles, one or more parameters indicative of fading change, changes in shape of fading profiles, fading variance, and of other channel characteristics may be determined. A classifier function may be trained to associate parameter values with a lack of motion, with device motion, or with motion of an object in the vicinity of a stationary wireless-enabled device. The classifier function may be used to determine whether there is motion based on one or more subsequently received packets.
16 Citations
18 Claims
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1. A method for detecting motion with a device, comprising:
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determining, at the device, one or more parameters indicative of a change in fading experienced by a wireless signal received by the device, wherein the determining the one or more parameters include; determining a fading profile indicative of how the wireless signal received by the device experiences fading at the device, and determining a second fading profile indicative of how a second wireless signal received by the device experiences fading at the device, wherein the one or more parameters are indicative of one or more differences between the fading profile and the second fading profile; determining, based on the one or more parameters indicative of the change in fading, whether a first of the device and an object in an environment of the device is moving; and responsive to a determination that the first of the device and the object is not moving, determining, based on the one or more parameters indicative of the change in fading, whether a second of the device and the object is moving, wherein a change in fading when the device is moving is greater than a change in fading when the device is stationary and the object is moving. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 17)
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9. A device, comprising:
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a receiver configured to receive a wireless signal; and one or more processors communicatively coupled to the receiver, the one or more processors configured to; determine one or more parameters indicative of a change in fading experienced by a wireless signal received by the device by determining a fading profile indicative of how the wireless signal received by the device experiences fading at the device, and determining a second fading profile indicative of how a second wireless signal received by the device experiences fading at the device, wherein the one or more parameters are indicative of one or more differences between the fading profile and the second fading profile; determine, based on the one or more parameters indicative of the change in fading, whether a first of the device and an object in an environment of the device is moving; and responsive to a determination that the first of the device and the object is not moving, determine, based on the one or more parameters indicative of the change in fading, whether a second of the device and the object is moving, wherein a change in fading when the device is moving is greater than a change in fading when the device is stationary. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 18)
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Specification