公开(公告)号：US11581964B2

公开(公告)日：2023-02-14

申请号：US17185498

申请日：2021-02-25

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Hongmin Choi ,  Haedong Yeon ,  Junse Lee ,  Heesang Noh ,  Changhyun Baek

IPC: H04B17/364 ,  H04B17/354 ,  H04B17/13

Abstract: A method is provided. The method includes estimating adjacent channel leakage ratios respectively corresponding based on a test output signal output from a power amplifier according to a test input signal corresponding to a plurality of frequencies; selecting a test delay value corresponding to a largest value among the estimated adjacent channel leakage ratios; and providing a supply voltage to the power amplifier based on an envelope signal delayed according to the selected test delay value. For each of the plurality of test delay values, a corresponding adjacent channel leakage ratio is estimated based on a ratio of a magnitude of a component included in the test output signal and a magnitude of an inter-modulated component.

公开(公告)号：US20240088926A1

公开(公告)日：2024-03-14

申请号：US18449130

申请日：2023-08-14

Applicant: Samsung Electronics Co., Ltd.

Inventor： Hongmin Choi ,  Heesang Noh ,  Kyungwoo Yoo ,  Hyungsun Lim

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H04B2001/045

Abstract: A wireless communication device includes a pre-distortion circuit configured to generate a pre-distortion signal by pre-distorting an input signal based on a pre-distortion coefficient, a power amplifier configured to generate an output signal by amplifying the pre-distortion signal, a measurement circuit configured to measure a magnitude of a first frequency component of a first adjacent channel and a magnitude of a second frequency component of a second adjacent channel of the output signal, a filtering circuit, that includes an error filter, configured to generate a filtered error signal by filtering an error signal that is based on the input signal and the output signal, the error filter is configured based on the magnitude of the first frequency component and the magnitude of the second frequency component, and a pre-distortion coefficient update circuit configured to update the pre-distortion coefficient based on the error signal or the filtered error signal.

公开(公告)号：US20220014287A1

公开(公告)日：2022-01-13

申请号：US17185498

申请日：2021-02-25

Applicant: SAMSUNG ELECTRONICS CO., LTD

Inventor： Hongmin Choi ,  Haedong Yeon ,  Junse Lee ,  Heesang Noh ,  Changhyun Baek

IPC: H04B17/364 ,  H04B17/354 ,  H04B17/13

Abstract: A method is provided. The method includes estimating adjacent channel leakage ratios respectively corresponding based on a test output signal output from a power amplifier according to a test input signal corresponding to a plurality of frequencies; selecting a test delay value corresponding to a largest value among the estimated adjacent channel leakage ratios; and providing a supply voltage to the power amplifier based on an envelope signal delayed according to the selected test delay value. For each of the plurality of test delay values, a corresponding adjacent channel leakage ratio is estimated based on a ratio of a magnitude of a component included in the test output signal and a magnitude of an inter-modulated component.