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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
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.
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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
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.
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23.发明授权公开(公告)号：US11575364B2
公开(公告)日：2023-02-07
申请号：US16543756
申请日：2019-08-19
Applicant: Apple Inc.
Inventor： Thomas Bauernfeind , Andreas Menkhoff , Michael Bruennert
Abstract: An apparatus for shifting a digital signal having a first sample rate by a shift time to provide a shifted signal having a second sample rate is provided. The apparatus includes a sample rate converter configured to provide a value of an interpolated signal at a compensated sample time as a sample of the shifted signal, the interpolated signal being based on the digital signal. The sample rate converter is configured to modify a time interval between a sample time of the digital signal and the compensated sample time based on the shift time.
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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
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.
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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.
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Patent Agency Ranking
公开(公告)号：US20240411006A1
公开(公告)日：2024-12-12
申请号：US18814253
申请日：2024-08-23
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Andreas Menkhoff , Bernhard Sogl , Jochen Schrattenecker , Rastislav Vazny
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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公开(公告)号：US12047101B2
公开(公告)日：2024-07-23
申请号：US17716724
申请日：2022-04-08
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Jochen Schrattenecker , Bin Xiao , Andre Hanke , Harald Pretl , Rastislav Vazny , Bernhard Sogl , Andreas Menkhoff
CPC classification number: H04B1/1027 , H04B1/123 , H04B15/005
Abstract: An electronic device may include wireless circuitry with a transmit antenna that transmits signals and a receive antenna that receives reflected signals. The wireless circuitry may detect a range between the device and an external object based on the transmitted signals and the reflected signals. When the range exceeds a first threshold, the wireless circuitry may use the transmitted signals and received signals to record background noise. When the range is less than a second threshold value, the wireless circuitry may detect the range based on the reflected signals and the recorded background noise. This may allow the range to be accurately measured within an ultra-short range domain even when the device is placed in different device cases, placed on different surfaces, etc.
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公开(公告)号：US11863225B2
公开(公告)日：2024-01-02
申请号：US17468482
申请日：2021-09-07
Applicant: Apple Inc.
Inventor： Andreas Menkhoff , Andreas Boehme , Bernhard Sogl , Jochen Schrattenecker , Joonhoi Hur
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.
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公开(公告)号：US11828871B2
公开(公告)日：2023-11-28
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
CPC classification number: G01S7/4056 , G01S7/40 , G01S7/4073
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.
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公开(公告)号：US11528181B2
公开(公告)日：2022-12-13
申请号：US16516281
申请日：2019-07-19
Applicant: Apple Inc.
Inventor： Andreas Menkhoff , Mohamed Ibrahim
Abstract: A method for determining a noise shaped quantized parameter contributing to generation of an output signal comprises estimating an error within the output signal using a quantization of the parameter and a quantization of a further parameter contributing to generation of the output signal. The quantization of the parameter is used as the noise shaped quantized parameter according to a selection criterion.
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