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    Electronic devices having quadratic phase generation circuitry
    12.
    发明授权
    Electronic devices having quadratic phase generation circuitry 有权

    公开(公告)号：US12052047B2

    公开(公告)日：2024-07-30

    申请号：US18319664

    申请日：2023-05-18

    Applicant: Apple Inc.

    Inventor： Andreas Menkhoff ,  Andreas Boehme ,  Bernhard Sogl ,  Jochen Schrattenecker ,  Joonhoi Hur

    IPC: H04B1/40 ,  H03K5/00 ,  H03K5/01

    CPC classification number: H04B1/40 ,  H03K5/01 ,  H03K2005/00013

    Abstract: An electronic device may include wireless circuitry. The wireless circuitry may include a quadratic phase generator for outputting a perfectly interpolated constant amplitude zero autocorrelation (CAZAC) sequence for a transmit path. The quadratic phase generator may include a numerically controlled oscillator, a switch controlled based on a value output from the numerically controlled oscillator, a first integrator stage, and a second integrator stage connected in series with the first integrator stage. The numerically controlled oscillator may receive as inputs a chirp count and a word length. The switch may be configured to switchably feed one of two input values that are a function of the chirp count and the word length to the first integrator stage. The quadratic phase generator may output full-bandwidth chirps or reduced-bandwidth chirps. Bandwidth reduction can be achieved by scaling the two input values of the switches.

    Methods and transceivers for self-interference mitigation
    13.
    发明授权
    Methods and transceivers for self-interference mitigation 有权

    公开(公告)号：US11791861B2

    公开(公告)日：2023-10-17

    申请号：US17418696

    申请日：2019-11-27

    Applicant: Apple Inc.

    Inventor： Andreas Menkhoff ,  Stefan Fechtel

    IPC: H04B1/52 ,  H04B1/525 ,  H04J11/00 ,  H04L27/26 ,  H04L27/28

    CPC classification number: H04B1/525 ,  H04J11/0023 ,  H04L27/2647 ,  H04L27/28

    Abstract: The present disclosure relates to a transceiver comprising a transmitter with transformation circuitry configured to transform a frequency-domain transmit symbol from frequency domain to time domain to generate a time-domain transmit signal, a receiver with inverse transformation circuitry configured to transform a time-domain receive signal from time domain to frequency domain to generate a frequency-domain receive symbol, and self-interference cancellation circuitry configured to modify the frequency-domain receive symbol based on at least one frequency-domain transmit symbol and a frequency-domain crosstalk channel estimate of a crosstalk channel between the transmitter and the receiver.

    DIGITAL PREDISTORTION OF SIGNALS
    15.
    发明申请
    DIGITAL PREDISTORTION OF SIGNALS 有权

    公开(公告)号：US20230034540A1

    公开(公告)日：2023-02-02

    申请号：US17964958

    申请日：2022-10-13

    Applicant: Apple Inc.

    Inventor： Andreas Langer ,  Christoph Hepp ,  Andreas Menkhoff ,  Gunther Kraut

    IPC: H04B1/04 ,  H03F1/32 ,  H03F3/24

    Abstract: Systems, circuitries, and methods for predistorting a digital signal in a transmit chain based on a predistortion function are provided. A method includes shifting a center frequency of an input signal by an offset to generate an adapted signal; predistorting the adapted signal based on a predistortion function to generate a predistorted adapted signal; reverting the shifting of the center frequency of the predistorted adapted signal by the offset to generate a predistorted signal; and causing transmission of the predistorted signal by a transmit chain.

    Electronic Devices Having Spatial Ranging Calibration Capabilities
    16.
    发明申请
    Electronic Devices Having Spatial Ranging Calibration Capabilities 有权

    公开(公告)号：US20220229155A1

    公开(公告)日：2022-07-21

    申请号：US17150974

    申请日：2021-01-15

    Applicant: Apple Inc.

    Inventor： Jochen Schrattenecker ,  Bernhard Sogl ,  Andreas Menkhoff ,  Joonhoi Hur ,  Harald Pretl ,  Christian Mayer ,  Andreas Langer ,  Rastislav Vazny

    IPC: G01S7/40

    Abstract: An electronic device may include radar circuitry. Control circuitry may calibrate the radar circuitry using a multi-tone calibration signal. A first mixer may upconvert the calibration signal for transmission by a transmit antenna. A de-chirp mixer may mix the calibration signal output by the first mixer with the calibration signal as received by a receive antenna or loopback path to produce a baseband multi-tone calibration signal. The baseband signal will be offset from DC by the frequency gap. This may prevent DC noise or other system effects from interfering with the calibration signal. The control circuitry may sweep the first mixer over the radio frequencies of operation of the radar circuitry to estimate the power droop and phase shift of the radar circuitry based on baseband calibration signal. Distortion circuitry may distort transmit signals used in spatial ranging operations to invert the estimated power droop and phase shift.

    Electronic Devices with Angular Location Detection Capabilities
    17.
    发明申请
    Electronic Devices with Angular Location Detection Capabilities 有权

    公开(公告)号：US20250155565A1

    公开(公告)日：2025-05-15

    申请号：US19022334

    申请日：2025-01-15

    Applicant: Apple Inc.

    Inventor： Joonhoi Hur ,  Andreas Menkhoff ,  Bernhard Sogl ,  Jochen Schrattenecker ,  Rastislav Vazny

    IPC: G01S13/42 ,  H01Q3/34

    Abstract: An electronic device may include wireless circuitry having a set of two or more antennas coupled to voltage standing wave ratio (VSWR) sensors. The VSWR sensors may gather VSWR measurements from radio-frequency signals transmitted using the set of antennas. The antennas may be disposed on one or more substrates and/or may be formed from conductive portions of a housing. Control circuitry may process the VSWR measurements to identify the ranges between each of the antennas in the set of antennas and an external object. The control circuitry may process the ranges to identify an angular location of the external object with respect to the device. The control circuitry may adjust subsequent communications based, adjust the direction of a signal beam produced by a phased antenna array, identify a user input, or perform any other desired operations based on the angular location.

    Electronic devices with angular location detection capabilities
    18.
    发明授权
    Electronic devices with angular location detection capabilities 有权

    公开(公告)号：US12181559B2

    公开(公告)日：2024-12-31

    申请号：US17331504

    申请日：2021-05-26

    Applicant: Apple Inc.

    Inventor： Joonhoi Hur ,  Andreas Menkhoff ,  Bernhard Sogl ,  Jochen Schrattenecker ,  Rastislav Vazny

    IPC: G01S13/42 ,  H01Q3/34

    Abstract: An electronic device may include wireless circuitry having a set of two or more antennas coupled to voltage standing wave ratio (VSWR) sensors. The VSWR sensors may gather VSWR measurements from radio-frequency signals transmitted using the set of antennas. The antennas may be disposed on one or more substrates and/or may be formed from conductive portions of a housing. Control circuitry may process the VSWR measurements to identify the ranges between each of the antennas in the set of antennas and an external object. The control circuitry may process the ranges to identify an angular location of the external object with respect to the device. The control circuitry may adjust subsequent communications based, adjust the direction of a signal beam produced by a phased antenna array, identify a user input, or perform any other desired operations based on the angular location.

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