公开(公告)号：US20210144036A1

公开(公告)日：2021-05-13

申请号：US16095977

申请日：2016-07-01

Applicant: Apple Inc.

Inventor： Christian Mayer ,  Jan Zaleski ,  Jovan Markovic

IPC: H04L27/20 ,  H04L27/36 ,  H03M1/66

Abstract: Embodiments provide a pre-distortion circuit and apparatus, a method and computer program for pre-distorting, a transmitter, a radio transceiver, a communication device, a mobile transceiver, a base station transceiver and a storage. The pre-distortion circuit (10) is configured for a digital quadrature signal. The pre-distortion circuit (10) comprises a first input (12) for an inphase component of the quadrature signal and a second input (14) for a quadrature component of the quadrature signal. The pre-distortion circuit 10 comprises a signal processing circuit (16) configured to determine whether polarities of the inphase component and quadrature component are equal, and to determine pre-distortion coefficients based on the amplitude of the inphase component, the amplitude of the quadrature component, and based on whether the polarities are equal.

公开(公告)号：US11184204B2

公开(公告)日：2021-11-23

申请号：US16095977

申请日：2016-07-01

Applicant: Apple Inc.

Inventor： Christian Mayer ,  Jan Zaleski ,  Jovan Markovic

IPC: H04L27/00 ,  H04L27/20 ,  H03M1/66 ,  H04L27/36

Abstract: Embodiments provide a pre-distortion circuit and apparatus, a method and computer program for pre-distorting, a transmitter, a radio transceiver, a communication device, a mobile transceiver, a base station transceiver and a storage. The pre-distortion circuit (10) is configured for a digital quadrature signal. The pre-distortion circuit (10) comprises a first input (12) for an inphase component of the quadrature signal and a second input (14) for a quadrature component of the quadrature signal. The pre-distortion circuit 10 comprises a signal processing circuit (16) configured to determine whether polarities of the inphase component and quadrature component are equal, and to determine pre-distortion coefficients based on the amplitude of the inphase component, the amplitude of the quadrature component, and based on whether the polarities are equal.