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公开(公告)号：US11943085B2
公开(公告)日：2024-03-26
申请号：US17994570
申请日：2022-11-28
Applicant: Huawei Technologies Co., Ltd.
Inventor： Wael Al-Qaq , Xiaobao Yu , Zhihang Zhang , Min Yi
CPC classification number: H04L27/2092
Abstract: A circuit includes a polar transmitter to generate a radio frequency output from amplitude and phase signal components. The polar transmitter includes an amplifier to combine amplitude and phase signal components. A processor is coupled to the polar transmitter to provide the amplitude and phase signal components. The processor includes: a digital modulation circuit to generate a modulated digital signal including in-phase and quadrature signal components and a correction circuit to calculate and apply a complex digital offset for local oscillator feedthrough of the amplifier. The complex digital offset includes an in-phase offset correction factor and a quadrature offset correction factor.
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公开(公告)号：US11881877B2
公开(公告)日：2024-01-23
申请号：US17653521
申请日：2022-03-04
Applicant: Huawei Technologies Co., Ltd.
Inventor： Hong Jiang , Wael Al-Qaq , Zhihang Zhang
CPC classification number: H04B1/0096 , H03D7/163 , H03L7/18
Abstract: A method includes producing a plurality of TX LO signals by a first LO generator comprising a first frequency doubler and a first frequency divider, the first frequency doubler configured to receive a VCO signal having a first frequency and generate a first signal fed into the first frequency divider, the first signal having a second frequency that is twice the first frequency, producing a plurality of MRX LO signals by a second LO generator comprising a second frequency doubler and a second frequency divider, the second frequency doubler configured to receive the VCO signal and generate a second signal fed into the second frequency divider, the second signal having the second frequency, configuring the TX to operate at a first LO frequency equal to the second frequency, and configuring the MRX to operate at a second LO frequency equal to the first frequency through disabling the second frequency doubler.
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公开(公告)号：US20230231585A1
公开(公告)日：2023-07-20
申请号：US18186536
申请日：2023-03-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Hong Jiang , Wael Al-Qaq , Zhihang Zhang
CPC classification number: H04B1/0475 , H04B1/30 , H04B2001/307
Abstract: A method for reducing distortions of a radio frequency (RF) system includes configuring a plurality of mixers to convert between a plurality of phase signals and a plurality of RF signals, configuring a first mixer of the plurality of mixers to operate in a six-phase operating mode to reduce the distortions of the RF system, and configuring a second mixer of the plurality of mixers to operate in a three-phase operating mode to reduce power consumption of the RF system.
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Patent Agency Ranking
公开(公告)号：US11533113B2
公开(公告)日：2022-12-20
申请号：US17103601
申请日：2020-11-24
Applicant: Huawei Technologies Co., Ltd.
Inventor： Wael Al-Qaq
Abstract: Techniques are presented to improve the accuracy of and reduce the time required for calibration of an in-phase/quadrature (I/Q) transmission circuit. A measurement receiver measures the I/Q mismatch, where an RF phase shift is introduced to distinguish between the transmitter and measurement receiver I/Q mismatches. Rather than assuming an amount of introduced phase shift, a measurement is used to estimate the phase shift. This phase estimate is then used to determine and correct the I/Q mismatch in the transmitter and measurement receiver. An iterative process can be used to improve the I/Q correction factors. Using simple signal processing to measure the phase shift during calibration and to perform the image calibration calculations, the phase shifter requirements can be significantly relaxed, resulting in faster design time and reduced design area/cost. This approach results in reduced calibration time, thus contributing to reduced factory production time and enabling faster live mode image calibration.
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公开(公告)号：US20220190848A1
公开(公告)日：2022-06-16
申请号：US17653521
申请日：2022-03-04
Applicant: Huawei Technologies Co., Ltd.
Inventor： Hong Jiang , Wael Al-Qaq , Zhihang Zhang
Abstract: A method includes producing a plurality of TX LO signals by a first LO generator comprising a first frequency doubler and a first frequency divider, the first frequency doubler configured to receive a VCO signal having a first frequency and generate a first signal fed into the first frequency divider, the first signal having a second frequency that is twice the first frequency, producing a plurality of MRX LO signals by a second LO generator comprising a second frequency doubler and a second frequency divider, the second frequency doubler configured to receive the VCO signal and generate a second signal fed into the second frequency divider, the second signal having the second frequency, configuring the TX to operate at a first LO frequency equal to the second frequency, and configuring the MRX to operate at a second LO frequency equal to the first frequency through disabling the second frequency doubler.
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公开(公告)号：US20210083781A1
公开(公告)日：2021-03-18
申请号：US17103601
申请日：2020-11-24
Applicant: Huawei Technologies Co., Ltd.
Inventor： Wael Al-Qaq
Abstract: Techniques are presented to improve the accuracy of and reduce the time required for calibration of an in-phase/quadrature (I/Q) transmission circuit. A measurement receiver measures the I/Q mismatch, where an RF phase shift is introduced to distinguish between the transmitter and measurement receiver I/Q mismatches. Rather than assuming an amount of introduced phase shift, a measurement is used to estimate the phase shift. This phase estimate is then used to determine and correct the I/Q mismatch in the transmitter and measurement receiver. An iterative process can be used to improve the I/Q correction factors. Using simple signal processing to measure the phase shift during calibration and to perform the image calibration calculations, the phase shifter requirements can be significantly relaxed, resulting in faster design time and reduced design area/cost. This approach results in reduced calibration time, thus contributing to reduced factory production time and enabling faster live mode image calibration.
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公开(公告)号：US11516054B2
公开(公告)日：2022-11-29
申请号：US17351779
申请日：2021-06-18
Applicant: Huawei Technologies Co., Ltd.
Inventor： Wael Al-Qaq , Xiaobao Yu , Zhihang Zhang , Min Yi
Abstract: A circuit includes a polar transmitter to generate a radio frequency output from amplitude and phase signal components. The polar transmitter includes an amplifier to combine amplitude and phase signal components. A processor is coupled to the polar transmitter to provide the amplitude and phase signal components. The processor includes: a digital modulation circuit to generate a modulated digital signal including in-phase and quadrature signal components and a correction circuit to calculate and apply a complex digital offset for local oscillator feedthrough of the amplifier. The complex digital offset includes an in-phase offset correction factor and a quadrature offset correction factor.
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公开(公告)号：US20210314204A1
公开(公告)日：2021-10-07
申请号：US17351779
申请日：2021-06-18
Applicant: Huawei Technologies Co., Ltd.
Inventor： Wael Al-Qaq , Xiaobao Yu , Zhihang Zhang , Min Yi
IPC: H04L27/20
Abstract: A circuit includes a polar transmitter to generate a radio frequency output from amplitude and phase signal components. The polar transmitter includes an amplifier to combine amplitude and phase signal components. A processor is coupled to the polar transmitter to provide the amplitude and phase signal components. The processor includes: a digital modulation circuit to generate a modulated digital signal including in-phase and quadrature signal components and a correction circuit to calculate and apply a complex digital offset for local oscillator feedthrough of the amplifier. The complex digital offset includes an in-phase offset correction factor and a quadrature offset correction factor.
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