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公开(公告)号：US09973370B1
公开(公告)日：2018-05-15
申请号：US15614817
申请日：2017-06-06
Applicant: Intel IP Corporation
Inventor： Andreas Langer , Christoph Hepp
CPC classification number: H04L27/368 , H04B7/00 , H04B17/3912 , H04W52/365
Abstract: An apparatus compensates nonlinearities in envelope tracking (ET) used in a mobile device by limiting a bandwidth of an envelope signal representing an envelope of an input baseband signal to be less than a bandwidth of tracker circuitry, generating a scaled replica of an output signal of the tracker circuitry based on the bandwidth-limited envelope signal, and generating a model distortion signal based on the scaled replica and the input baseband signal, where the model distortion signal emulates ET linearity degradation. The apparatus is further configured to generate an output baseband signal based on the scaled replica, the model distortion signal, and the input baseband signal, where the output baseband signal is pre-distorted relative to the input baseband signal according to the scaled replica, the model distortion signal, and the input baseband signal to compensate for degradations in transmit signal quality due to ET nonlinearities.
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公开(公告)号：US20210067386A1
公开(公告)日：2021-03-04
申请号：US16958060
申请日：2018-03-30
Applicant: Intel IP Corporation
Inventor： Armando Cova , Christoph Hepp , Gunther Kraut , Andreas Langer
Abstract: An apparatus for a mobile communication device adapted for digital pre-distortion that includes a memory and a processor operatively coupled to the memory of the processor. The processor receives a first input signal and also receives a first output signal from a power amplifier that is based on the first input signal. The processor additionally varies compression applied to a second input signal based on the first output signal of the power amplifier, generates a distortion compensation vector for the second input signal based on the first output signal of the power amplifier, and also varies an input excitation signal supplied to the power amplifier based on the first output signal of the power amplifier.
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公开(公告)号：US20180234060A1
公开(公告)日：2018-08-16
申请号：US15811860
申请日：2016-06-08
Applicant: Intel IP Corporation
Inventor： Andreas Langer , Christoph Hepp
CPC classification number: H03F3/19 , H03F1/0216 , H03F1/0222 , H03F3/245 , H03F2200/105 , H03F2200/336 , H03F2200/36 , H03F2200/451 , H03G3/3042 , H03G2201/302 , H03G2201/307 , H04B1/04
Abstract: A circuit for generating a radio frequency signal is provided. The circuit includes an amplifier configured to generate a radio frequency signal based on a baseband signal. Further, the circuit includes a power supply configured to generate a variable supply voltage based on a control signal indicating a desired supply voltage, and to supply the variable supply voltage to the amplifier. The circuit further includes an envelope tracking circuit configured to generate the control signal based on a bandwidth of the baseband signal, and to supply the control signal to the power supply.
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