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公开(公告)号：US20240027602A1
公开(公告)日：2024-01-25
申请号：US18256443
申请日：2020-12-30
申请人： Khalifa University of Science and Technology , British Telecommunications PLC , Emirates Telecommunications Corporation
发明人： Anas AL RAWI , Ian COOPER , Ubaid ur R AHMAD , Trevor MORSMAN , Nawaf ALMOOSA
摘要： This invention relates to methods and devices for detection of motion. Embodiments of the invention provide a method of detecting motion of an object using a wireless transceiver device, the method including the steps of: transmitting wireless signals from a transmitter element in the transceiver device, the signals being reflected by the object; receiving the signals reflected by the object in a receiver element in the transceiver device; estimating at least one channel characteristic from the reflected signals; applying a time and/or frequency domain analysis to the estimated channel characteristic; detecting any variation in the estimated channel characteristic over time; and detecting motion of the object based on the detected variation. A wireless transceiver device arranged to detect motion is also provided.
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公开(公告)号：US20240118369A1
公开(公告)日：2024-04-11
申请号：US18256247
申请日：2020-12-07
申请人： KHALIFA UNIVERSITY OF SCIENCE AND TECHNOLOGY , BRITISH TELECOMMUNICATIONS PLC , EMIRATES TELECOMMUNICATIONS CORPORATION
发明人： James AWEYA , Nawaf ALMOOSA
IPC分类号： G01S5/02
CPC分类号： G01S5/0242 , G01S5/0278
摘要： This invention relates to methods and systems for determining whether a reference point in a location system has changed used measurement residuals determined from an exchange of messages between reference points. In one embodiment a method of determining whether the location of a first one of a plurality of reference points used in a location system has changed is provided. The reference points each have a known initial position and the method includes the steps of: sending a wireless message between a second reference point and the first reference point and recording the times of sending and receipt of the wireless message; estimating, from the recorded times, an estimated distance between the first reference point and the second reference point; comparing the estimated distance to the actual distance between the known initial positions of the first and second reference points to determine a measurement residual; and determining, using the measurement residual, whether the location of the first reference point has changed.
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公开(公告)号：US20240031202A1
公开(公告)日：2024-01-25
申请号：US18256225
申请日：2020-12-07
申请人： Khalifa University of Science and Technology , British Telecommunications PLC , Emirates Telecommunications Corporation
发明人： James Aweya , Nawaf ALMOOSA
CPC分类号： H04L25/0212 , H04W64/00
摘要： This invention relates to methods and systems for determining whether a reference point in a location system has changed using the entropy of channel impulse responses. In one embodiment a method of determining whether the location of a first one of a plurality of reference points used in a location system has changed is provided. The reference points each have a known initial position and the method includes the steps of: estimating a channel impulse response of a wireless channel between the first reference point and a second of said plurality of reference points; determining the difference between the estimated channel impulse response and a previously-estimated channel impulse response of the wireless channel; estimating an entropy of the difference between the channel impulse responses; and determining, from said comparison, whether the location of the first reference point has changed. In another embodiment the method includes the steps of: estimating an entropy of the channel impulse response of a wireless channel between the first reference point and a second of said plurality of reference points; comparing the estimated entropy to a previously-estimated entropy for the channel impulse response of the wireless channel; determining, from said comparison, whether the location of the first reference point has changed.
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