公开(公告)号：US11502707B2

公开(公告)日：2022-11-15

申请号：US17230090

申请日：2021-04-14

Applicant: Apple Inc.

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

IPC: H04L25/49 ,  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.

公开(公告)号：US20210234564A1

公开(公告)日：2021-07-29

申请号：US17230090

申请日：2021-04-14

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.

公开(公告)号：US12176934B2

公开(公告)日：2024-12-24

申请号：US17862619

申请日：2022-07-12

Applicant: Apple Inc.

Inventor： Andreas Menkhoff ,  Gunther Kraut ,  Andreas Langer

IPC: H04B1/04

Abstract: A predistortion circuit for a wireless transmitter includes a signal input configured to receive a baseband signal. Further, the predistortion circuit includes a predistorter configured to generate a predistorted baseband signal using the baseband signal and a select of one of a first predistorter configuration and a second predistorter configuration.

公开(公告)号：US20220368360A1

公开(公告)日：2022-11-17

申请号：US17862619

申请日：2022-07-12

Applicant: Apple Inc.

Inventor： Andreas Menkhoff ,  Gunther Kraut ,  Andreas Langer

IPC: H04B1/04

Abstract: A predistortion circuit for a wireless transmitter includes a signal input configured to receive a baseband signal. Further, the predistortion circuit includes a predistorter configured to generate a predistorted baseband signal using the baseband signal and a select of one of a first predistorter configuration and a second predistorter configuration.

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.

公开(公告)号：US20200382147A1

公开(公告)日：2020-12-03

申请号：US16766416

申请日：2017-12-29

Applicant: Apple Inc.

Inventor： Andreas Menkhoff ,  Gunther Kraut ,  Andreas Langer

IPC: H04B1/04

Abstract: A predistortion circuit for a wireless transmitter includes a signal input configured to receive a baseband signal. Further, the predistortion circuit includes a predistorter configured to generate a predistorted baseband signal using the baseband signal and a select of one of a first predistorter configuration and a second predistorter configuration.

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

IPC: H04B1/04 ,  H03F1/32 ,  H03F3/24

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.