公开(公告)号：US20150280657A1

公开(公告)日：2015-10-01

申请号：US14316296

申请日：2014-06-26

Applicant: QUALCOMM Incorporated

Inventor： Haojen Cheng ,  Hao Zhou ,  Chiao-Cheng Huang

IPC: H03F1/32 ,  H04B1/04

CPC classification number: H03F1/3241 ,  H03F2201/3215 ,  H03F2201/3233 ,  H04B1/0475 ,  H04B2001/0425 ,  H04L25/03343 ,  H04L27/368

Abstract: Methods, systems, and devices are described for adaptive digital pre-distortion (DPD). A wireless device may identify a transmission parameter, such as data rate or transmission power, for a signal to be transmitted by a wireless modem. The wireless device may then select a power amplification response based on whether the transmission parameter exceeds a threshold. A non-linear power amplification response may be selected in cases when the data rate is low or the transmission power is high. A linear power amplification response may be selected when the data rate is high or the transmission power is low. The power amplification response may be achieved by digital distortion of the signal prior to power amplification, so selection of the response may involve adjusting a DPD compensation circuit. In some cases, the output for the non-linear response may be characterized by a Rapp model.

Abstract translation: 描述了用于自适应数字预失真（DPD）的方法，系统和设备。 无线设备可以识别要由无线调制解调器发送的信号的传输参数，例如数据速率或传输功率。 然后，无线设备可以基于传输参数是否超过阈值来选择功率放大响应。 在数据速率低或发送功率高的情况下，可以选择非线性功率放大响应。 当数据速率高或发送功率低时，可以选择线性功率放大响应。 功率放大响应可以通过功率放大之前的信号的数字失真来实现，因此响应的选择可以涉及调整DPD补偿电路。 在某些情况下，非线性响应的输出可以由Rapp模型表征。

公开(公告)号：US08953711B2

公开(公告)日：2015-02-10

申请号：US13909478

申请日：2013-06-04

Applicant: QUALCOMM Incorporated

Inventor： Haojen Cheng ,  Chiao Cheng Huang ,  Hao Zhou

IPC: H04L25/03 ,  H04L27/36 ,  H03F1/32

CPC classification number: H04L27/368 ,  H03F1/3247

Abstract: A configurable pre-emphasis filter component may be configured based upon measured frequency response (e.g., filter effect) associated with at least one analog filter positioned between a digital predistortion component and a power amplification component of a transmission circuitry. The frequency response may be measured using a calibration signal sent via the transmission circuitry, a loopback circuit, and a reception circuitry. Calibration circuitry may be used with one or more loopback circuits to measure the frequency response of various analog components of the transmission circuitry. The calibration circuitry may also include logic to determine a configuration for the PEF component based upon the measured frequency response.

Abstract translation: 可以基于与位于传输电路的数字预失真部件和功率放大部件之间的至少一个模拟滤波器相关联的测量的频率响应（例如，滤波器效应）来配置可配置的预加重滤波器部件。 频率响应可以使用经由传输电路，环回电路和接收电路发送的校准信号来测量。 校准电路可以与一个或多个环回电路一起使用，以测量传输电路的各种模拟部件的频率响应。 校准电路还可以包括基于所测量的频率响应确定PEF分量的配置的逻辑。

公开(公告)号：US20150160279A1

公开(公告)日：2015-06-11

申请号：US14564071

申请日：2014-12-08

Applicant: QUALCOMM Incorporated

Inventor： Hao Zhou ,  Feipeng Wang ,  Haojen Cheng ,  Volodymyr Rakytyanskyy

IPC: G01R29/26 ,  H03F1/32

CPC classification number: G01R29/26 ,  H03F1/3247 ,  H03F3/189 ,  H03F3/245 ,  H03F2201/3209 ,  H03F2201/3224 ,  H03F2201/3233

Abstract: An input signal is transmitted to a component. A distortion associated with the component is determined based, at least in part, on an output signal generated by the component in response to the input signal. A distortion error measurement associated with the component is determined based, at least in part, on the distortion and the output signal generated by the component. A memory effect and the associated nonlinearity within the component are quantified based, at least in part, on the distortion error measurement.

Abstract translation: 输入信号被发送到组件。 至少部分地基于由该组件响应输入信号产生的输出信号来确定与该组件相关联的失真。 至少部分地基于由该部件产生的失真和输出信号确定与该部件相关联的失真误差测量。 至少部分地基于失真误差测量量化部件内的记忆效应和相关联的非线性。