Time-of-flight measurement system and method

    公开(公告)号:US12210091B2

    公开(公告)日:2025-01-28

    申请号:US17869865

    申请日:2022-07-21

    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.

    EARLY COMMIT LATE DETECT ATTACK PREVENTION

    公开(公告)号:US20240378930A1

    公开(公告)日:2024-11-14

    申请号:US18544089

    申请日:2023-12-18

    Abstract: In an embodiment, a method includes identifying, by a first device, a level of degradation. The method also includes transmitting, by the first device during a communication phase, a first signal with a first signal quality based on the level of degradation. The method further includes transmitting, by the first device during a second communication phase, a second signal with a second signal quality. The second signal quality may be greater than the first signal quality.

    METHODS, APPARATUS, AND ARTICLES OF MANUFACTURE TO SECURE COMMUNICATIONS AGAINST EARLY-DETECT-LATE-COMMIT ATTACKS

    公开(公告)号:US20240187443A1

    公开(公告)日:2024-06-06

    申请号:US18440491

    申请日:2024-02-13

    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.

    FREQUENCY-DIVISION MULTIPLEXING
    4.
    发明申请

    公开(公告)号:US20220255580A1

    公开(公告)日:2022-08-11

    申请号:US17554922

    申请日:2021-12-17

    Abstract: A method is provided. In some examples, the method includes generating, by processing circuitry, a spread of chips representing an input bit. In addition, the method includes converting, by the processing circuitry, the spread of chips to a plurality of symbols comprising a pair of symbols. The method also includes mapping, by the processing circuitry, the pair of symbols to a single carrier signal and generating, by the processing circuitry, a radio-frequency (RF) signal based on the single carrier signal. The method further includes transmitting, by the processing circuitry via an antenna, the RF signal.

    ELECTRONIC DEVICE AND METHOD FOR LOW POWER RF RANGING

    公开(公告)号:US20210215812A1

    公开(公告)日:2021-07-15

    申请号:US17216866

    申请日:2021-03-30

    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.

    Low power software defined radio (SDR)

    公开(公告)号:US09928199B2

    公开(公告)日:2018-03-27

    申请号:US14242404

    申请日:2014-04-01

    CPC classification number: G06F13/4022 H04L49/101 Y02D10/14 Y02D10/151

    Abstract: A communication apparatus comprising a plurality of signal processing units configured to perform a set of pre-determined signal processing functions according to a set of parameters, a plurality of programmable crossbars coupled to the plurality of signal processing units, and a plurality of control processors coupled to the plurality of programmable crossbars and configured to adjust the plurality of programmable crossbars to interconnect the signal processing units to implement a selected communication protocol, wherein at least one of the programmable crossbars routes data from a first of the plurality of signal processing units to a second of the plurality of signal processing units forming a data path without interception from the plurality of control processors.

    Frequency-division multiplexing
    7.
    发明授权

    公开(公告)号:US12301276B2

    公开(公告)日:2025-05-13

    申请号:US17554922

    申请日:2021-12-17

    Abstract: A method is provided. In some examples, the method includes generating, by processing circuitry, a spread of chips representing an input bit. In addition, the method includes converting, by the processing circuitry, the spread of chips to a plurality of symbols comprising a pair of symbols. The method also includes mapping, by the processing circuitry, the pair of symbols to a single carrier signal and generating, by the processing circuitry, a radio-frequency (RF) signal based on the single carrier signal. The method further includes transmitting, by the processing circuitry via an antenna, the RF signal.

    Methods, apparatus, and articles of manufacture to secure communications against early-detect-late-commit attacks

    公开(公告)号:US11936681B2

    公开(公告)日:2024-03-19

    申请号:US17463297

    申请日:2021-08-31

    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

    公开(公告)号:US11366216B2

    公开(公告)日:2022-06-21

    申请号:US16680714

    申请日:2019-11-12

    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

    公开(公告)号:US10962632B2

    公开(公告)日:2021-03-30

    申请号:US15845290

    申请日:2017-12-18

    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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