公开(公告)号：US20190280730A1

公开(公告)日：2019-09-12

申请号：US16424500

申请日：2019-05-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Lie ZHANG ,  Erni ZHU ,  Yuxiang XIAO

IPC: H04B1/62 ,  H04B1/04

Abstract: This application relates to the field of communications technologies, and in particular, to a digital predistortion processing method and apparatus. This application provides a digital predistortion processing method and apparatus. Digital predistortion processing of a multichannel power amplifier is supported through deprecoding processing by using one feedback link and one digital predistortion processor. In addition, after being amplified by a power amplifier, a precoded signal is fed back to the feedback link for predistortion parameter calculation, to improve quality of a transmit signal. The digital predistortion processing method and apparatus that are provided in embodiments of this application are intended to improve output linearity and efficiency of a multi-transmit-channel power amplifier while reducing implementation costs and complexity of a transmit device, and further improve overall system performance.

公开(公告)号：US20180294900A1

公开(公告)日：2018-10-11

申请号：US16009571

申请日：2018-06-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Lie ZHANG ,  Jianxiong BAI ,  Meifeng LI ,  Qiang LI

IPC: H04B17/21 ,  H04B1/00

CPC classification number: H04B17/21 ,  H04B1/0071 ,  H04L27/38

Abstract: A method for determining a calibration parameter of a zero intermediate frequency radio receiver, and a zero intermediate frequency radio receiver are provided. The method includes: obtaining a plurality of sub-band training signals, where a sum of the plurality of sub-band training signals is a fullband training signal; determining a sub-band calibration parameter corresponding to each of the plurality of sub-band training signals; determining a fullband calibration signal according to the plurality of sub-band training signals and the sub-band calibration parameter corresponding to each of the plurality of sub-band training signals; and performing coefficient fitting on the fullband training signal and the fullband calibration signal, to determine a fullband calibration parameter. Because sub-band calibration parameters are obtained according to a plurality of different sub-band training signals, aliasing between an image signal and a training signal is reduced. Therefore, a speed and precision of determining a calibration parameter can be improved.