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    Methods, apparatus, and articles of manufacture to secure communications against early-detect-late-commit attacks
    11.
    发明授权
    Methods, apparatus, and articles of manufacture to secure communications against early-detect-late-commit attacks 有权

    公开(公告)号：US11936681B2

    公开(公告)日：2024-03-19

    申请号：US17463297

    申请日：2021-08-31

    Applicant: Texas Instruments Incorporated

    Inventor： Tomas Motos ,  Espen Wium

    IPC: H04L29/06 ,  H04B1/04 ,  H04L9/40 ,  H04L25/02 ,  H04L43/0864

    CPC classification number: H04L63/1441 ,  H04B1/04 ,  H04L25/0202 ,  H04L43/0864

    Abstract: An example apparatus includes target signal generator circuitry to generate a target signal having a first center frequency and a bandwidth. The example apparatus additionally includes companion signal generator circuitry to generate a companion signal having a second center frequency that is less than (a) the first center frequency adjusted by a first threshold and greater than (b) the first center frequency adjusted by a second threshold, the first threshold being a first multiple of the bandwidth, the second threshold being a second multiple of the bandwidth, the first multiple different than the second multiple. In some examples, the example apparatus includes adder circuitry to combine the target signal and the companion signal to form a composite signal. Additionally, the example apparatus includes transmitter circuitry to transmit the composite signal to a target device.

    Combined phase and time-of-flight measurement
    12.
    发明授权
    Combined phase and time-of-flight measurement 有权

    公开(公告)号：US11366216B2

    公开(公告)日：2022-06-21

    申请号：US16680714

    申请日：2019-11-12

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Tomas Motos ,  Espen Wium

    IPC: G01S13/84 ,  B60R25/24

    Abstract: Systems and methods of measuring distance between two wireless devices by combining phase shift and time-of-flight measurements. A first wireless devices sends a first packet to the second wireless device. After receiving the first packet, the second wireless device sending to the first wireless device a second packet. After sending the second packet, the second wireless device sends a first continuous wave signal to the first wireless device. After receiving the first continuous wave signal, the first wireless device sends to the second wireless device a second continuous wave signal. The first wireless device then calculates a time-of-flight measurement based on a time between the first wireless device sending the first packet and receiving the second packet, and calculates a second measurement based on a phase shift of the first continuous wave signal and the second continuous wave signal, and combines the two measurements.

    Electronic device and method for low power RF ranging
    13.
    发明授权
    Electronic device and method for low power RF ranging 有权

    公开(公告)号：US10962632B2

    公开(公告)日：2021-03-30

    申请号：US15845290

    申请日：2017-12-18

    Applicant: Texas Instruments Incorporated

    Inventor： Marius Moe ,  Espen Wium ,  Tomas Motos ,  Hagen Clemens Graf

    IPC: G01S11/08 ,  G01S13/38 ,  G01S13/82

    Abstract: Electronic devices and methods to provide wireless ranging are shown. A first electronic device includes a memory containing stored instructions that can perform a method for determining a distance between the first electronic device and a second electronic device. For each frequency in a selected set of frequencies, the method sets the transceiver to the respective frequency, sends a first tone having the frequency and a first phase to the second electronic device and receives a second tone having the first frequency and a second phase. For each selected frequency, the first electronic device determines the phase difference between the second tone and the controllable oscillator, receives a phase difference from the second electronic device, and calculates a phase delay for the frequency. The first electronic device calculates a phase delay difference for pairs of the frequencies; and determines the distance using these phase delay differences.

    Time-of-flight measurement system and method
    15.
    发明授权
    Time-of-flight measurement system and method 有权

    公开(公告)号：US12210091B2

    公开(公告)日：2025-01-28

    申请号：US17869865

    申请日：2022-07-21

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Tomas Motos ,  Espen Wium ,  Trond Meckelborg Rognerud ,  Aslak Ringvoll Normann ,  Oskar Gustaf Fredrik Von Heideken ,  Reidar Myhr

    IPC: G01S13/87 ,  G01S7/285 ,  G01S13/76

    Abstract: Techniques related to measuring a time-of-flight (ToF), comprising switching a first measuring station to a main operating mode, transmitting, by the first measuring station, a first ToF packet to a remote device, switching the first measuring station to a receive mode to receive a first ToF response packet from the remote device, receiving, by the first measuring station, the first ToF response packet, determining, a time interval between transmitting of the first ToF packet and receiving the first ToF response packet, receiving a plurality of time intervals from one or more other measuring stations, determining a ToF measurement based on the first time interval and the plurality of time intervals, switching the first measuring station to a secondary operating mode, and transmitting to a second measuring station, an indication to switch to the main operating mode.

    METHODS, APPARATUS, AND ARTICLES OF MANUFACTURE TO SECURE COMMUNICATIONS AGAINST EARLY-DETECT-LATE-COMMIT ATTACKS
    16.
    发明公开
    METHODS, APPARATUS, AND ARTICLES OF MANUFACTURE TO SECURE COMMUNICATIONS AGAINST EARLY-DETECT-LATE-COMMIT ATTACKS 审中-公开

    公开(公告)号：US20240187443A1

    公开(公告)日：2024-06-06

    申请号：US18440491

    申请日：2024-02-13

    Applicant: Texas Instruments Incorporated

    Inventor： Tomas Motos ,  Espen Wium

    IPC: H04L9/40 ,  H04B1/04 ,  H04L25/02 ,  H04L43/0864

    CPC classification number: H04L63/1441 ,  H04B1/04 ,  H04L25/0202 ,  H04L43/0864

    Abstract: An example apparatus includes target signal generator circuitry to generate a target signal having a first center frequency and a bandwidth. The example apparatus additionally includes companion signal generator circuitry to generate a companion signal having a second center frequency that is less than (a) the first center frequency adjusted by a first threshold and greater than (b) the first center frequency adjusted by a second threshold, the first threshold being a first multiple of the bandwidth, the second threshold being a second multiple of the bandwidth, the first multiple different than the second multiple. In some examples, the example apparatus includes adder circuitry to combine the target signal and the companion signal to form a composite signal. Additionally, the example apparatus includes transmitter circuitry to transmit the composite signal to a target device.

    ELECTRONIC DEVICE AND METHOD FOR LOW POWER RF RANGING
    19.
    发明申请
    ELECTRONIC DEVICE AND METHOD FOR LOW POWER RF RANGING 有权

    公开(公告)号：US20210215812A1

    公开(公告)日：2021-07-15

    申请号：US17216866

    申请日：2021-03-30

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Marius Moe ,  Espen Wium ,  Tomas Motos ,  Hagen Clemens Graf

    IPC: G01S11/08 ,  G01S13/82 ,  G01S13/38

    Abstract: Electronic devices and methods to provide wireless ranging are shown. A first electronic device includes a memory containing stored instructions that can perform a method for determining a distance between the first electronic device and a second electronic device. For each frequency in a selected set of frequencies, the method sets the transceiver to the respective frequency, sends a first tone having the frequency and a first phase to the second electronic device and receives a second tone having the first frequency and a second phase. For each selected frequency, the first electronic device determines the phase difference between the second tone and the controllable oscillator, receives a phase difference from the second electronic device, and calculates a phase delay for the frequency. The first electronic device calculates a phase delay difference for pairs of the frequencies; and determines the distance using these phase delay differences.

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