公开(公告)号：US10951249B1

公开(公告)日：2021-03-16

申请号：US16830481

申请日：2020-03-26

Applicant: Xilinx, Inc.

Inventor： Hongzhi Zhao ,  Vince C Barnes ,  Xiaohan Chen ,  Hemang Parekh

IPC: H04B1/04 ,  H04W52/16

Abstract: A transmit circuit operated with time-interpolated digital pre-distortion (DPD) coefficients to improve adjacent channel power ratio (ACPR) performance during a power mode change is provided. The transmit circuit includes a DPD circuit configured to operate with a first DPD coefficient according to a first transmit power level of a transmit power amplifier of the transmit circuit. The transmit circuit further includes a DPD coefficient management engine configured to retrieve a second DPD coefficient corresponding to the second transmit power level. The transmit circuit further includes a DPD coefficient time-interpolation engine configured to compute a set of time-interpolated DPD coefficients corresponding to a set of time instants for a transient period when the transmit power amplifier is adapted to the second DPD coefficient.