公开(公告)号：US11082013B2

公开(公告)日：2021-08-03

申请号：US15975783

申请日：2018-05-10

Applicant: MEDIATEK INC.

Inventor： Ching-Shyang Maa ,  Chun-Hsien Peng ,  Hua-Lung Yang ,  I-No Liao ,  Chen-Jui Hsu ,  Jen-Yang Liu

IPC: H03F3/04 ,  H03F1/32 ,  H03F3/21 ,  H03F3/19 ,  H03F1/30 ,  H03F1/02 ,  H03F3/24

Abstract: A method of reducing memory effect of a power amplifier (PA), for a look-up table (LUT) based memory digital pre-distortion (DPD) circuit of an electronic device is disclosed. The method comprises generating a pre-distorted signal according to a LUT including parameters of an input signal amplitude and an input signal delay associated with a bandwidth of a signal inputted to the memory DPD circuit, and outputting the pre-distorted signal to the PA for improving the nonlinearity of the PA.

公开(公告)号：US20180331662A1

公开(公告)日：2018-11-15

申请号：US15975783

申请日：2018-05-10

Applicant: MEDIATEK INC.

Inventor： Ching-Shyang Maa ,  Chun-Hsien Peng ,  Hua-Lung Yang ,  I-No Liao ,  Chen-Jui Hsu ,  Jen-Yang Liu

IPC: H03F1/32 ,  H03F3/21 ,  H03F3/19 ,  H03F1/30

CPC classification number: H03F1/3258 ,  H03F1/30 ,  H03F3/19 ,  H03F3/21 ,  H03F2200/451 ,  H03F2200/468 ,  H03F2201/3209 ,  H03F2201/3224 ,  H03F2201/3233

Abstract: A method of reducing memory effect of a power amplifier (PA), for a look-up table (LUT) based memory digital pre-distortion (DPD) circuit of an electronic device is disclosed. The method comprises generating a pre-distorted signal according to a LUT including parameters of an input signal amplitude and an input signal delay associated with a bandwidth of a signal inputted to the memory DPD circuit, and outputting the pre-distorted signal to the PA for improving the nonlinearity of the PA.