公开(公告)号：US10079702B2

公开(公告)日：2018-09-18

申请号：US14972038

申请日：2015-12-16

Applicant: MediaTek Inc.

Inventor： YuenHui Chee ,  Fei Song ,  James Wang ,  Toru Matsuura ,  Osama K. A. Shana'a ,  Chiyuan Lu

IPC: H04L27/00 ,  H03F3/21 ,  H03F1/02 ,  H03F3/19 ,  H04L25/08 ,  H04B1/40 ,  H03F3/24 ,  H04L27/36 ,  H04B1/04 ,  H03F1/32 ,  H03F3/189 ,  H03F3/20

CPC classification number: H04L27/0002 ,  H03F1/0205 ,  H03F1/3241 ,  H03F1/3247 ,  H03F3/189 ,  H03F3/19 ,  H03F3/20 ,  H03F3/245 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2201/3236 ,  H04B1/0475 ,  H04B1/40 ,  H04B2001/0425 ,  H04L25/08 ,  H04L27/36 ,  H04L27/368

Abstract: Examples of front-end modules, apparatuses and methods for coupling compensation in a closed-loop digital pre-distortion (DPD) system are described. The closed-loop DPD circuit may include a PA and a loopback path. The PA may receive a PA input signal and amplify the PA input signal to provide a PA output signal proportional to a product of the PA input signal and a gain of the PA. The loopback path may receive the PA output signal to output a loopback signal. A forward coupling and a backward coupling may exist between the PA input signal and an output of the loopback path. The output of the loopback path may be proportional to a product of the PA output signal and a gain of the loopback path. The loopback path may include a coupling cancellation mechanism configured to cancel couplings between the PA input signal and the loopback signal.

公开(公告)号：US10349420B2

公开(公告)日：2019-07-09

申请号：US15990715

申请日：2018-05-28

Applicant: MEDIATEK INC.

Inventor： James Wang ,  Hsin-Ying Lee ,  Shih-Chieh Yen ,  Ming-Yu Hsieh ,  Pei-Kai Liao

IPC: H04W72/04 ,  H04L5/00

Abstract: Aspects of the disclosure provide a control apparatus that includes transceiver circuitry and processing circuitry. The transceiver circuitry is configured to transmit/receive signals from a plurality of terminal devices using a shared channel. The processing circuitry is configured to determine distances to the plurality of terminal devices, allocate resource elements in the shared channel according to the distances, and communicate, via the transceiver circuitry, with the plurality of terminal devices according to the allocation of the resource elements in the shared channel.

公开(公告)号：US20180352544A1

公开(公告)日：2018-12-06

申请号：US15990715

申请日：2018-05-28

Applicant: MEDIATEK INC.

Inventor： James Wang ,  Hsin-Ying Lee ,  Shih-Chieh Yen ,  Ming-Yu Hsieh ,  Pei-Kai Liao

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04W72/048 ,  H04L5/0039 ,  H04W72/042 ,  H04W72/0453

Abstract: Aspects of the disclosure provide a control apparatus that includes transceiver circuitry and processing circuitry. The transceiver circuitry is configured to transmit/receive signals from a plurality of terminal devices using a shared channel. The processing circuitry is configured to determine distances to the plurality of terminal devices, allocate resource elements in the shared channel according to the distances, and communicate, via the transceiver circuitry, with the plurality of terminal devices according to the allocation of the resource elements in the shared channel.

公开(公告)号：US20160105299A1

公开(公告)日：2016-04-14

申请号：US14972038

申请日：2015-12-16

Applicant: MediaTek Inc.

Inventor： YuenHui Chee ,  Fei Song ,  James Wang ,  Toru Matsuura ,  Osama K.A. Shana'a ,  Chiyuan Lu

IPC: H04L27/00 ,  H03F3/21 ,  H03F1/02 ,  H03F3/19 ,  H04L25/08 ,  H04B1/40

CPC classification number: H04L27/0002 ,  H03F1/0205 ,  H03F1/3241 ,  H03F1/3247 ,  H03F3/189 ,  H03F3/19 ,  H03F3/20 ,  H03F3/245 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2201/3236 ,  H04B1/0475 ,  H04B1/40 ,  H04B2001/0425 ,  H04L25/08 ,  H04L27/36 ,  H04L27/368

Abstract: Examples of front-end modules, apparatuses and methods for coupling compensation in a closed-loop digital pre-distortion (DPD) system are described. The closed-loop DPD circuit may include a PA and a loopback path. The PA may receive a PA input signal and amplify the PA input signal to provide a PA output signal proportional to a product of the PA input signal and a gain of the PA. The loopback path may receive the PA output signal to output a loopback signal. A forward coupling and a backward coupling may exist between the PA input signal and an output of the loopback path. The output of the loopback path may be proportional to a product of the PA output signal and a gain of the loopback path. The loopback path may include a coupling cancellation mechanism configured to cancel couplings between the PA input signal and the loopback signal.

Abstract translation: 描述了用于在闭环数字预失真（DPD）系统中耦合补偿的前端模块，装置和方法的示例。 闭环DPD电路可以包括PA和环回路径。 PA可以接收PA输入信号并放大PA输入信号，以提供与PA输入信号的乘积和PA的增益成比例的PA输出信号。 环回路径可以接收PA输出信号以输出环回信号。 在PA输入信号和环回路径的输出之间可能存在正向耦合和反向耦合。 环回路径的输出可能与PA输出信号与环回路径的增益的乘积成比例。 环回路径可以包括被配置为消除PA输入信号和环回信号之间的耦合的耦合消除机构。