公开(公告)号：US12279190B1

公开(公告)日：2025-04-15

申请号：US17853641

申请日：2022-06-29

Applicant: Amazon Technologies, Inc.

Inventor： Feng Zhang ,  Xiaofu Ma ,  Piyush Tayal ,  Cong Phuoc Huynh ,  Xi Chen ,  Mohammed Rana Basheer ,  Avinash Joshi

IPC: H04W4/38 ,  H04B7/06 ,  H04B17/336 ,  H04W4/021 ,  H04W52/52 ,  H04W84/12

Abstract: Technologies directed to respiration monitoring based on noise channel state information (CSI) data are described. A method includes receiving CSI data representing channel properties of a wireless channel used by a first wireless device and a second wireless device located in a geographical region. The method generates a set of CSI samples by sampling the CSI data and removes one or more outlier CSI samples using a sparse outlier process, and removes a cluster of outlier samples using a cluster outlier process. The method determines Fast Fourier Transform (FFT) data for each channel subcarrier index and a signal-to-noise ratio (SNR) value for each channel subcarrier index, and identifies a first number of channel subcarrier indexes having highest SNR values to obtain a subset of FFT data, which represents a breathing spectrum. The method determines a respiratory rate of a user in the geographical region from the subset of the FFT data.

公开(公告)号：US11925447B1

公开(公告)日：2024-03-12

申请号：US17183773

申请日：2021-02-24

Applicant: Amazon Technologies, Inc.

Inventor： Pratik Kalpesh Patel ,  Feng Zhang ,  Koohyun Um ,  James J. Wolfe

IPC: A61B5/05 ,  A61B5/00 ,  A61B5/11 ,  A61B5/113 ,  G01S13/62 ,  G16H40/67 ,  G16H50/30

CPC classification number: A61B5/05 ,  A61B5/1115 ,  A61B5/113 ,  A61B5/4806 ,  G01S13/62 ,  G16H40/67 ,  G16H50/30 ,  A61B5/1128

Abstract: A method and system including a monitoring device to detect, during a session, a set of radar signals associated with first respiratory-related movements of a first person and second respiratory-related movements of a second person located within a detection zone comprising at least a portion of a bed. The method and system dynamically generate an out-of-bed zone adjacent to a side of the bed. The out-of-bed zone is monitored to detect motion within the zone to determine when the first person exits and enters the bed. The method and system identify a portion of the set of radar signals collected during a time period when the first person is determined to be out of the bed. The identified portion of the set of radar signals is removed from the set of radar signals collected during the sleep session.