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公开(公告)号：US11817892B2
公开(公告)日：2023-11-14
申请号：US17964958
申请日：2022-10-13
Applicant: Apple Inc.
Inventor： Andreas Langer , Christoph Hepp , Andreas Menkhoff , Gunther Kraut
CPC classification number: H04B1/0475 , H03F1/3247 , H03F3/245 , H03F2200/102 , H03F2200/451 , H03F2201/3231 , H04B2001/0425
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：US20230075465A1
公开(公告)日：2023-03-09
申请号：US17468482
申请日：2021-09-07
Applicant: Apple Inc.
Inventor： Andreas Menkhoff , Andreas Boehme , Bernhard Sogl , Jochen Schrattenecker , Joonhoi Hur
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：US20220381900A1
公开(公告)日：2022-12-01
申请号：US17332221
申请日：2021-05-27
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Andreas Menkhoff , Bernhard Sogl , Jochen Schrattenecker , Rastislav Vazny
Abstract: An electronic device may include a voltage standing wave ratio (VSWR) sensor disposed along a radio-frequency transmission line between a signal generator and an antenna. The VSWR sensor may gather VSWR measurements from radio-frequency signals transmitted by the signal generator over the transmission line. Control circuitry may identify a variation in the VSWR measurements over time and may compare the variation to a threshold value to determine whether an external object in the vicinity of the antenna is animate or inanimate. The control circuitry may reduce the maximum transmit power level of the antenna when the external object is animate and may maintain or increase the maximum transmit power level when the external object is inanimate. This may serve to maximize the wireless performance of the electronic device while also ensuring that the device complies with regulatory limits on radio-frequency energy exposure.
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公开(公告)号：US11165495B2
公开(公告)日：2021-11-02
申请号：US16792147
申请日：2020-02-14
Applicant: Apple Inc.
Inventor： Sabine Roessel , Holger Neuhaus , Yeong-Sun Hwang , Bertram Gunzelmann , Andreas Menkhoff , Elmar Wagner , Jong-Kae Fwu , Xiangyang Zhuang
Abstract: Methods and apparatus for communicating in a wireless network including apparatus comprising transceiver circuitry to send and receive data in a plurality of time periods, defined by a time division duplex (TDD) time grid, to another entity, the plurality of time periods corresponding to a plurality of orthogonal frequency division multiplexing (OFDM) symbols and the transceiver circuitry being operable to switch from receive mode to transmit mode and/or from transmit mode to receive mode according to a flexible uplink and downlink allocation of the plurality of time periods; and baseband circuitry coupled to the transceiver circuitry to control the transceiver circuitry to switch during a switching interval embedded within a time period corresponding to an OFDM symbol of the plurality of OFDM symbols.
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公开(公告)号：US11064440B2
公开(公告)日：2021-07-13
申请号：US16542821
申请日：2019-08-16
Applicant: Apple Inc.
Inventor： Andreas Menkhoff
Abstract: Described herein are architectures, platforms and methods for implementing scalable power in a wireless device. Multiple radio access technology architectures running different operating clock frequencies are supported by providing a scaled static clock frequency and dynamic clock frequencies by dynamically switching parallel paths of processing resources.
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Patent Agency Ranking
公开(公告)号：US20240364318A1
公开(公告)日：2024-10-31
申请号：US18308221
申请日：2023-04-27
Applicant: Apple Inc.
Inventor： Zdravko Boos , Andreas Menkhoff , Bertram R Gunzelmann , Nedim Muharemovic
CPC classification number: H03K5/01 , H03D7/00 , G04F10/005 , H03K2005/00078 , H03K2005/00286
Abstract: An electronic device may include wireless circuitry that conveys wireless signals and that is clocked using clocking circuitry. The clocking circuitry may include a signal source that generates a clock signal and a loop path coupled between the input and the output of the signal source. A digital frequency discriminator (DFD) may be disposed on the loop path. The DFD may include a digital delay and digital phase shifter coupled between an input converter and a digital mixer. The DFD may receive the clock signal and may generate a control signal indicative of phase noise of the clock signal. The DFD may feed the control signal back into the input of the signal source to mitigate the phase noise. The DFD may minimize phase noise of the signal source while minimizing space and power consumption on the device relative to analog frequency discriminators.
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公开(公告)号：US20240333325A1
公开(公告)日：2024-10-03
申请号：US18743593
申请日：2024-06-14
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：US20230417900A1
公开(公告)日：2023-12-28
申请号：US18456429
申请日：2023-08-25
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Andreas Menkhoff , Bernhard Sogl , Jochen Schrattenecker , Rastislav Vazny
Abstract: An electronic device may include a voltage standing wave ratio (VSWR) sensor disposed along a radio-frequency transmission line between a signal generator and an antenna. The VSWR sensor may gather VSWR measurements from radio-frequency signals transmitted by the signal generator over the transmission line. Control circuitry may identify a variation in the VSWR measurements over time and may compare the variation to a threshold value to determine whether an external object in the vicinity of the antenna is animate or inanimate. The control circuitry may reduce the maximum transmit power level of the antenna when the external object is animate and may maintain or increase the maximum transmit power level when the external object is inanimate. This may serve to maximize the wireless performance of the electronic device while also ensuring that the device complies with regulatory limits on radio-frequency energy exposure.
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公开(公告)号：US20230327929A1
公开(公告)日：2023-10-12
申请号：US18167017
申请日：2023-02-09
Applicant: Apple Inc.
Inventor： Jochen Schrattenecker , Michael Hofstadler , Andreas Springer , Reinhard Feger , Andreas Stelzer , Harald Pretl , Bernhard Sogl , Andreas Menkhoff
IPC: H04L27/26 , G01S17/66 , G01S7/4865
CPC classification number: H04L27/2605 , G01S7/4865 , G01S17/66
Abstract: An electronic device may include wireless circuitry that conveys data with a base station according to a communication standard and that detects range to an external object using a first antenna that transmits a waveform compliant with the standard. The waveform may be a Sounding Reference Signal (SRS) waveform, a transmit data waveform, or another waveform. A second antenna may receive a reflected signal that includes the transmitted waveform. The communications circuitry may perform element-wise division on symbols of a selected subcarrier in the reflected signal using corresponding phases and magnitudes of a set of complex OFDM symbols used to generate the transmitted waveform. Peak detection may be performed to detect the range. Using standard-compliant transmit waveforms to also perform spatial ranging may allow the communications circuitry to avoid dedicated radar circuitry while also minimizing impact to the transfer of the data.
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公开(公告)号：US11782151B2
公开(公告)日：2023-10-10
申请号：US17332221
申请日：2021-05-27
Applicant: Apple Inc.
Inventor： Joonhoi Hur , Andreas Menkhoff , Bernhard Sogl , Jochen Schrattenecker , Rastislav Vazny
Abstract: An electronic device may include a voltage standing wave ratio (VSWR) sensor disposed along a radio-frequency transmission line between a signal generator and an antenna. The VSWR sensor may gather VSWR measurements from radio-frequency signals transmitted by the signal generator over the transmission line. Control circuitry may identify a variation in the VSWR measurements over time and may compare the variation to a threshold value to determine whether an external object in the vicinity of the antenna is animate or inanimate. The control circuitry may reduce the maximum transmit power level of the antenna when the external object is animate and may maintain or increase the maximum transmit power level when the external object is inanimate. This may serve to maximize the wireless performance of the electronic device while also ensuring that the device complies with regulatory limits on radio-frequency energy exposure.
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