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    WIFI-BASED MULTI-ROOM PRESENCE DETECTION
    1.
    发明申请
    WIFI-BASED MULTI-ROOM PRESENCE DETECTION 有权

    公开(公告)号：US20250130327A1

    公开(公告)日：2025-04-24

    申请号：US18898486

    申请日：2024-09-26

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Lianjun Li ,  Han Wang ,  Hao Chen ,  Wei Sun ,  Satvir S. Bhatia ,  Andrea M. Small ,  Russell Douglas Ford

    IPC: G01S13/56 ,  H04W84/12

    Abstract: Methods and systems for user presence detection using wireless technology. A computer-implemented method includes receiving one or more data signals from at least one WiFi-node-to-Access-Point (AP) link or at least one WiFi-node-to-node link, performing a signal pre-processing process on the one or more data signals to generate one or more pre-processed data signals, performing the signal pre-processing process including performing a uniform sampling process, a power normalization process, an anomaly sample removal process, and a filtering process, extracting one or more features using the one or more pre-processed data signals, and using the one or more features to determine whether a user is present in the home and identify a specific room in which the user is located.

    OPPORTUNISTIC MULTIPLE CARRIERS BASED FINE RANGING
    6.
    发明申请
    OPPORTUNISTIC MULTIPLE CARRIERS BASED FINE RANGING 有权

    公开(公告)号：US20240430842A1

    公开(公告)日：2024-12-26

    申请号：US18523844

    申请日：2023-11-29

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Wei Sun ,  Shunyao Wu ,  Hao Chen ,  Vishnu Vardhan Ratnam ,  Jianzhong Zhang

    IPC: H04W64/00 ,  H04B7/06 ,  H04W72/02 ,  H04W72/0453

    Abstract: Methods and apparatuses for operating multiple carriers in a wireless communication system. A method for a first network entity comprises: identifying a plurality of carrier frequencies for measuring carrier phases from a set of predefined carrier frequencies; estimating, based on the measured carrier phase, a distance between the first network entity and a second network entity using a carrier ranging operation that is performed between the first network entity and the second network entity; selecting, based on the estimated distance, historical information, a variation of measured distance, and channel status information, at least one carrier frequency from the plurality of carrier frequencies to refine distance measurement; and transmitting, to and receive from the second network entity, signals over the selected at least one carrier frequency.

    LOCALIZATION USING CARRIER PHASE INFORMATION
    9.
    发明申请
    LOCALIZATION USING CARRIER PHASE INFORMATION 有权

    公开(公告)号：US20250028016A1

    公开(公告)日：2025-01-23

    申请号：US18770486

    申请日：2024-07-11

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Vishnu Vardhan Ratnam ,  Wei Sun ,  Bilal Sadiq ,  Hao Chen ,  Kyeong Jin Kim ,  Shunyao Wu ,  Boon Loong Ng ,  Jianzhong Zhang

    IPC: G01S5/02 ,  G01S5/04 ,  G01S5/14

    Abstract: A method includes obtaining range estimates and carrier phase estimates from each of multiple anchors. The method also includes, in response to determining that a trilateration technique is to be performed, (i) obtaining improved range estimates using the carrier phase estimates and (ii) determining a first location estimate of a target device using the trilateration technique and the improved range estimates. The method also includes, in response to determining that a triangulation technique is to be performed, (i) obtaining differential range estimates using the carrier phase estimates and (ii) determining a second location estimate of the target device using the triangulation technique and the differential range estimates. The method also includes combining the first location estimate and the second location estimate to determine an overall location estimate of the target device.

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