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    CIRCUITS FOR LINEARIZING AN OUTPUT SIGNAL OF A NON-LINEAR COMPONENT AND RELATED DEVICES AND METHODS
    32.
    发明申请
    CIRCUITS FOR LINEARIZING AN OUTPUT SIGNAL OF A NON-LINEAR COMPONENT AND RELATED DEVICES AND METHODS 有权
    用于线性化非线性组件的输出信号的电路及相关设备和方法

    公开(公告)号：US20160352290A1

    公开(公告)日：2016-12-01

    申请号：US14403182

    申请日：2014-11-22

    Applicant: Telefonaktiebolaget L M Ericssson (publ)

    Inventor： Bjorn Gavert ,  Tony Gustafsson

    IPC: H03F1/32 ,  H04B1/40 ,  H03F3/24

    CPC classification number: H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/195 ,  H03F3/24 ,  H03F3/245 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233 ,  H04B1/40 ,  H04L25/03343 ,  H04L27/368

    Abstract: This disclosure provides a circuit for linearizing an output signal Sout produced by a non-linear component based on an input signal x(n). The circuit comprises a primary pre-distorter module configured to generate a pre-distorted signal y(n) based on the input signal x(n) and a primary pre-distortion function parameterized by a pre-distortion parameter λ and to feed the pre-distorted signal y(n) to the non-linear component. The circuit comprises an estimation module. The estimation module is configured to receive samples z(n) of the output signal Sout, and to determine the pre-distortion parameter λ. The estimation module comprises a secondary pre-distorter module configured to generate a secondary pre-distorter output signal r(n) based on a secondary pre-distortion function and the samples z(n) of the output signal Sout. The secondary pre-distorter module is configured to determine the pre-distortion parameter λ based on a previously determined pre-distortion parameter stored on a data storage, the secondary pre-distorter output signal r(n) and the pre-distorted signal y(n) provided by the primary pre-distorted module. The determining comprises correlating the input signal x(n) with an error signal between the pre-distorted signal y(n) and the secondary pre-distorter output signal r(n).

    Abstract translation: 本公开提供了一种用于基于输入信号x（n）线性化由非线性分量产生的输出信号Sout的电路。 该电路包括：初级预失真器模块，被配置为基于输入信号x（n）和由预失真参数λ参数化的初级预失真函数产生预失真信号y（n） 失真信号y（n）到非线性分量。 电路包括估计模块。 估计模块被配置为接收输出信号Sout的样本z（n），并且确定预失真参数λ。 估计模块包括次级预失真器模块，其被配置为基于次级预失真功能和输出信号Sout的样本z（n）产生二次预失真器输出信号r（n）。 次级预失真器模块被配置为基于存储在数据存储器上的先前确定的预失真参数来确定预失真参数λ，次级预失真器输出信号r（n）和预失真信号y（ n）由初级预失真模块提供。 确定包括将输入信号x（n）与预失真信号y（n）和次预失真器输出信号r（n）之间的误差信号进行相关。

    Multi-path digital pre-distortion
    37.
    发明授权
    Multi-path digital pre-distortion 有权
    多路数字预失真

    公开(公告)号：US09172409B2

    公开(公告)日：2015-10-27

    申请号：US14088252

    申请日：2013-11-22

    Applicant: Xilinx, Inc.

    Inventor： Gregory C. Copeland

    IPC: H04B1/04 ,  H03F1/32 ,  H03F3/24 ,  H03F3/189 ,  H04L27/36

    CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H03F1/3258 ,  H03F3/189 ,  H03F3/245 ,  H03F2200/111 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233 ,  H04B1/04 ,  H04B1/0483 ,  H04B2001/0425 ,  H04L27/367

    Abstract: An apparatus relates generally to multi-path digital predistortion. In this apparatus, a single-band digital predistorter engine has first and second sample paths. An input stage is coupled to receive input samples and configured to separate them into first samples and second samples. The input stage provides first and second magnitudes for the first and second samples, respectively. A first set of digital predistorters receives the first samples, the first magnitudes and the second magnitudes. A second set of digital predistorters receives the second samples, the second magnitudes and the first magnitudes. An output stage is coupled to receive predistorted outputs from the first set of digital predistorters and the second set of digital predistorters and is configured to provide a digital predistorted composite signal from the first set of digital predistorters and the second set of digital predistorters.

    Abstract translation: 一种装置一般涉及多径数字预失真。 在该装置中，单频数字预失真器引擎具有第一和第二采样路径。 输入级被耦合以接收输入样本并被配置为将它们分离成第一样本和第二样本。 输入级分别为第一和第二采样提供第一和第二幅度。 第一组数字预失真器接收第一个样本，第一个量值和第二个量值。 第二组数字预失真器接收第二个样本，第二个量值和第一个量值。 输出级被耦合以从第一组数字预失真器和第二组数字预失真器接收预失真输出，并且被配置为从第一组数字预失真器和第二组数字预失真器提供数字预失真复合信号。

    AUGMENTED TWIN NONLINEAR TWO-BOX MODELING AND PREDISTORTION METHOD FOR POWER AMPLIFIERS AND TRANSMITTERS
    38.
    发明申请
    AUGMENTED TWIN NONLINEAR TWO-BOX MODELING AND PREDISTORTION METHOD FOR POWER AMPLIFIERS AND TRANSMITTERS 有权
    用于功率放大器和发射器的双向非线性双盒建模和预测方法

    公开(公告)号：US20150162881A1

    公开(公告)日：2015-06-11

    申请号：US14101256

    申请日：2013-12-09

    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

    Inventor： OUALID HAMMI

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

    CPC classification number: H03F1/3247 ,  H03F1/3258 ,  H03F3/189 ,  H03F3/24 ,  H03F2200/451 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233

    Abstract: The augmented twin nonlinear two-box modeling and predistortion method for power amplifiers and transmitters provides power amplifier distortion modeling and predistortion linearization. A memoryless nonlinearity is combined with a memory polynomial function that includes cross-terms. The method can utilize an augmented forward twin-nonlinear two-box model, an augmented reverse twin-nonlinear two-box model, or alternatively, an augmented parallel twin-nonlinear two-box model. The present two-box models are validated in modeling and predistortion applications. Measurement results demonstrate the superiority of the present two-box models with respect to conventional state of the art models. The present two-box models lead to better accuracy with reduced complexity.

    Abstract translation: 功率放大器和发射机的增强双非线性双箱建模和预失真方法提供功率放大器失真建模和预失真线性化。 无记忆非线性与包含交叉项的存储多项式函数组合。 该方法可以利用增强的前向双非线性双箱模型，增强的反向双非线性双箱模型，或者增加的并行双非线性双箱模型。 目前的双箱型号在建模和预失真应用中得到验证。 测量结果证明了现有的双箱模型相对于现有技术模型的优越性。 目前的双盒型号导致更好的精度，降低了复杂性。

    DIGITAL PRE-DISTORTION SYSTEMS IN TRANSMITTERS
    39.
    发明申请
    DIGITAL PRE-DISTORTION SYSTEMS IN TRANSMITTERS 有权
    发射机中的数字预失真系统

    公开(公告)号：US20150016567A1

    公开(公告)日：2015-01-15

    申请号：US13940263

    申请日：2013-07-12

    Applicant: ANALOG DEVICES TECHNOLOGY

    Inventor： Dong Chen

    IPC: H04B1/04

    CPC classification number: H04B1/0475 ,  H03F1/3247 ,  H03F1/3258 ,  H03F1/3282 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/111 ,  H03F2201/3206 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233 ,  H04B2001/0425

    Abstract: Various digital pre-distortion systems for use in transmitters are disclosed. The digital pre-distortion system comprises an observing path, which performs either undersampling or radio frequency sampling of the output of a power amplifier. Undersampling may be performed at a rate, which causes aliasing to occur in the undersampled frequency domain. Both undersampling and radio frequency sampling reduces the complexity of the digital pre-distortion system by removing any down mixing modules or anti-aliasing modules, while maintaining reasonable performance of the digital pre-distortion systems.

    Abstract translation: 公开了用于发射机的各种数字预失真系统。 数字预失真系统包括观测路径，其执行功率放大器的输出的欠采样或射频采样。 可以以使得在欠采样频域中出现混叠的速率来执行不抽样。 欠采样和射频采样都可以通过去除任何下混频模块或抗混叠模块来降低数字预失真系统的复杂性，同时保持数字预失真系统的合理性能。

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