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1. 发明申请

WO2017095869A8 DIGITAL COMPENSATOR 审中-公开
标题翻译：数字补偿器
公开(公告)号：WO2017095869A8
公开(公告)日：2017-08-10
申请号：PCT/US2016064127
申请日：2016-11-30
申请人： NANOSEMI INC
发明人： KIM HELEN H , MEGRETSKI ALEXANDRE , YAN LI , KEVIN CHUANG , MAHMOOD ZOHAIB
IPC分类号： H03F1/32
CPC分类号： H04B1/0475 , H03F1/3241 , H03F1/3252 , H03F1/3258 , H04B2001/0425
摘要： An approach to digital compensation uses a particular structure for a digital pre-distorter (DPD) which acts as a relatively accurate pre-inverse of a non-linear circuit (e.g., a non linear transmit chain involving digital-to-analog converter (DAC), lowpass filter, modulator, bandpass filter, and power amplifier) while making use of a relatively small number of parameters that characterize the non-linearity and/or parameters that provide accurate linearization without requiring continual updating.
摘要翻译：数字补偿方法使用数字预失真器（DPD）的特定结构，该数字预失真器用作非线性电路的相对准确的预反转（例如，涉及数模转换器（DAC）的非线性发送链），低通滤波器，调制器，带通滤波器和功率放大器），同时利用表征非线性的相对少量的参数和/或提供准确线性化而不需要持续更新的参数。

2. 发明申请

WO2016128025A1 CONTROLLING MECHANISM FOR A DIRECT LEARNING ALGORITHM 审中-公开
标题翻译：控制直接学习算法的机制
公开(公告)号：WO2016128025A1
公开(公告)日：2016-08-18
申请号：PCT/EP2015/052686
申请日：2015-02-10
申请人： NOKIA SOLUTIONS AND NETWORKS GMBH & CO. KG
发明人： ROESCHKE, Rene , KULARATNA, Shavantha , JELONNEK, Bjoern , REICHL, Christian
IPC分类号： H03F1/32 , H03F3/195 , H03F3/24 , H04L27/36
CPC分类号： H03F1/3247 , H03F1/3258 , H03F3/195 , H03F3/245 , H03F2200/451 , H03F2201/3212
摘要： The present invention addresses method, apparatus and computer program product for controlling a Direct Learning Algorithm. Thereby, a power amplifier operating in a non- linear state is controlled. A signal to be amplified is input to a pre-distorter provided for compensating for non-linearity of the power amplifier. The pre-distorted output signal is forwarded from the pre-distorter to the power amplifier. Parameters of the pre-distorter are adapted in plural steps based on an error between a linearized signal output from the power amplifier and the signal to be amplified using an adaptive direct learning algorithm. It is detected whether the error diverges; and adapting of the parameters of the pre-distorter is stopped when it is determined that the error is diverging.
摘要翻译：本发明涉及用于控制直接学习算法的方法，装置和计算机程序产品。由此，控制在非线性状态下工作的功率放大器。要放大的信号被输入到预失真器，用于补偿功率放大器的非线性。预失真的输出信号从预失真器转发到功率放大器。基于使用自适应直接学习算法从功率放大器输出的线性化信号和要放大的信号之间的误差，预变送器的参数被适应多个步骤。检测误差是否发生偏差; 并且当确定错误发散时，停止预失真器的参数的调整。

3. 发明申请

WO2016078038A1 一种预失真处理的装置及方法审中-公开
公开(公告)号：WO2016078038A1
公开(公告)日：2016-05-26
申请号：PCT/CN2014/091668
申请日：2014-11-19
申请人：华为技术有限公司
发明人：赵延青 , 余春蕾 , 田廷剑
IPC分类号： H03F1/32
CPC分类号： H04L27/368 , H03F1/3247 , H03F1/3258 , H03F1/3294 , H03F3/189 , H03F3/245 , H03F2200/102 , H03F2201/32 , H03F2201/3233 , H04L25/03343
摘要：本发明提供一种预失真处理的装置及方法，装置包括：辅助反馈模块，用于从模拟信号中提取非线性失真信号，将获取的与非线性失真信号对应的反馈信号输入辅助模型系数训练模块；辅助模型系数训练模块，用于根据反馈信号、预失真信号对辅助系数进行训练，并将训练得到的第一辅助系数传递给预失真处理模块；射频信号反馈模块，用于提取基波反馈信号；预失真模型系数训练模块，用于根据预失真信号、基波反馈信号对预失真系数进行训练，将得到的预失真系数传递给预失真处理模块；预失真处理模块，用于根据第一辅助系数和预失真系数进行非线性建模，并对输入的中频信号进行预失真处理，并将预失真处理得到的预失真信号输出。

4. 发明申请

WO2016065633A1 一种曲线拟合电路、模拟预失真器和射频信号发射机审中-公开
公开(公告)号：WO2016065633A1
公开(公告)日：2016-05-06
申请号：PCT/CN2014/090095
申请日：2014-10-31
申请人：华为技术有限公司
发明人：黄伟
IPC分类号： G06F17/10
CPC分类号： H03F1/3247 , G06F17/10 , G06F17/17 , H03F1/3258 , H03F3/189 , H03F3/19 , H03F3/20 , H03F3/245 , H03F2200/102 , H03F2200/451
摘要：一种曲线拟合电路、模拟预失真器和射频信号发射机，用以解决在射频信号分解时采用现有的多项式拟合经常会用到高阶多项式所导致的拟合结果对高次项系数和量化噪声都非常敏感的问题。该曲线拟合电路中的每个分段处理电路，按照预设规则截取接收到的输入信号中的一部分，以及根据截取的部分生成待处理信号，并采用多项式拟合的方法根据所述待处理信号生成q个输出信号；不同分段处理电路截取的部分不完全相同；每个第一加法电路，接收各个分段处理电路的q个输出信号中的一个信号，并根据接收到的n个信号之和得到所述曲线拟合电路的一个输出信号；不同第一加法电路接收同一个分段处理电路的q个输出信号中的不同输出信号。

5. 发明申请

WO2015033232A3 ADAPTIVE NONLINEAR MODEL LEARNING 审中-公开
标题翻译：自适应非线性模型学习
公开(公告)号：WO2015033232A3
公开(公告)日：2015-11-12
申请号：PCT/IB2014002688
申请日：2014-09-09
申请人： MAGNACOM LTD
发明人： ELIAZ AMIR , REUVEN ILAN , PITARASHO GAL
IPC分类号： H03F1/32
CPC分类号： H03F1/3258 , H03F1/3282 , H03F3/24 , H03F2201/3233
摘要： In accordance with an example implementation of this disclosure, a receiver may comprise a signal reconstruction circuit and a nonlinearity modeling circuit. The nonlinearity modeling circuit may be operable to generate a look-up table (LUT)-based model of nonlinear distortion present in a received signal. An entry of the LUT may comprise a signal power parameter value and a distortion parameter value. The signal reconstruction circuit may be operable to generate one or more candidates for a transmitted signal corresponding to the received signal. The signal reconstruction circuit may be operable to distort the one or more candidates according to the model, the distortion resulting in one or more reconstructed signals. The signal reconstruction circuit may be operable to decide a best one of the candidates based on the one or more reconstructed signals.
摘要翻译：根据本公开的示例实现，接收器可以包括信号重构电路和非线性建模电路。非线性建模电路可用于生成存在于接收信号中的非线性失真的基于查找表（LUT）的模型。 LUT的条目可以包括信号功率参数值和失真参数值。信号重构电路可以用于产生对应于接收信号的发射信号的一个或多个候选。信号重构电路可以用于根据模型使一个或多个候选失真，失真导致一个或多个重构信号。信号重构电路可以用于基于一个或多个重构信号来决定候选中的最佳候选者。

6. 发明申请

WO2015033232A2 ADAPTIVE NONLINEAR MODEL LEARNING 审中-公开
标题翻译：自适应非线性模型学习
公开(公告)号：WO2015033232A2
公开(公告)日：2015-03-12
申请号：PCT/IB2014/002688
申请日：2014-09-09
申请人： MAGNACOM LTD.
发明人： ELIAZ, Amir , REUVEN, Ilan , PITARASHO, Gal
CPC分类号： H03F1/3258 , H03F1/3282 , H03F3/24 , H03F2201/3233
摘要： In accordance with an example implementation of this disclosure, a receiver may comprise a signal reconstruction circuit and a nonlinearity modeling circuit. The nonlinearity modeling circuit may be operable to generate a look-up table (LUT)-based model of nonlinear distortion present in a received signal. An entry of the LUT may comprise a signal power parameter value and a distortion parameter value. The signal reconstruction circuit may be operable to generate one or more candidates for a transmitted signal corresponding to the received signal. The signal reconstruction circuit may be operable to distort the one or more candidates according to the model, the distortion resulting in one or more reconstructed signals. The signal reconstruction circuit may be operable to decide a best one of the candidates based on the one or more reconstructed signals.
摘要翻译：根据本公开的示例性实现，接收机可以包括信号重建电路和非线性建模电路。非线性建模电路可以用于产生在接收信号中存在的非线性失真的查找表（LUT）模型。 LUT的条目可以包括信号功率参数值和失真参数值。信号重构电路可以用于为对应于接收信号的发射信号产生一个或多个候选。信号重构电路可以用于根据模型使一个或多个候选者失真，导致一个或多个重构信号的失真。信号重建电路可以用于基于一个或多个重建信号来决定候选中的最佳候选。

7. 发明申请

WO2015022581A2 COMBINED TRANSMISSION PRECOMPENSATION AND RECEIVER NONLINEARITY MITIGATION 审中-公开
标题翻译：组合传输预警和接收非线性缓解
公开(公告)号：WO2015022581A2
公开(公告)日：2015-02-19
申请号：PCT/IB2014/002449
申请日：2014-08-15
申请人： MAGNACOM LTD.
发明人： ELIAZ, Amir , REUVEN, Ilan
CPC分类号： H04B1/0475 , H03F1/3241 , H03F1/3247 , H03F1/3258 , H03F3/24 , H03F2201/3227 , H03F2201/3233 , H04B2001/0408 , H04B2001/0425
摘要： Circuitry of a transmitter may comprise a predistortion circuit cascaded with a nonlinear circuit. The nonlinear circuit may be characterized by a first response corresponding to a first error vector magnitude. A response of the predistortion circuit may be configured based on the first response of the nonlinear circuit such that a composite response of the predistortion circuit cascaded with the nonlinear circuit differs from the first response and is characterized by a second error vector magnitude that is greater or equal than the first error vector magnitude. The response of the predistortion circuit may be configured based on feedback of an output of the nonlinear circuit. The response of the predistortion circuit may be configured based on parameters received from a receiver partner of the transmitter during connection setup, in preambles, in message headers, and/or in dedicated messages.
摘要翻译：发射机的电路可以包括与非线性电路级联的预失真电路。非线性电路的特征在于对应于第一误差向量幅度的第一响应。可以基于非线性电路的第一响应来配置预失真电路的响应，使得与非线性电路级联的预失真电路的复合响应与第一响应不同，并且其特征在于较大的第二误差矢量幅度或等于第一误差矢量幅度。可以基于非线性电路的输出的反馈来配置预失真电路的响应。预失真电路的响应可以基于在连接建立期间，前导码，消息头部和/或专用消息中从发射机的接收机伙伴接收的参数来配置。

8. 发明申请

WO2013153485A1 DIGITAL PREDISTORTER (DPD) STRUCTURE BASED ON DYNAMIC DEVIATION REDUCTION (DDR)-BASED VOLTERRA SERIES 审中-公开
标题翻译：基于动态偏差减少的数字预测器（DPD）结构（DDR）-BASED VOLTERRA系列
公开(公告)号：WO2013153485A1
公开(公告)日：2013-10-17
申请号：PCT/IB2013/052640
申请日：2013-04-02
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： BAI, Chunlong
IPC分类号： H03F1/32 , H03F3/189 , H03F3/24 , H04L27/36
CPC分类号： H03F1/3247 , H03F1/3258 , H03F1/3288 , H03F3/189 , H03F3/24 , H03F2201/3209 , H03F2201/3212 , H03F2201/3233 , H04L27/368
摘要： The present invention provides a method and apparatus predistorting an input signal to compensate for non-linearities in an electronic device that operates on the input signal. The invention may be used, for example, to digitally predistort an input signal for a power amplifier in a wireless communication device. The predistorter (100, 200) uses a polynomial approach based on the well-known Volterra series to model the distortion function. A dynamic deviation reduction technique is used to reduce the number of terms in the distortion model and to facilitate implementation. The approach described herein eliminates square functions present in prior art designs and can be implemented using CORDIC circuits.
摘要翻译：本发明提供一种预失真输入信号以补偿在输入信号上工作的电子设备中的非线性的方法和装置。本发明可以用于例如在无线通信设备中数字地预失真功率放大器的输入信号。预失真器（100,200）使用基于众所周知的Volterra系列的多项式方法来对失真函数进行建模。使用动态偏差缩减技术来减少失真模型中的项数，并有助于实现。这里描述的方法消除了现有技术设计中存在的方形函数，并且可以使用CORDIC电路来实现。

9. 发明申请

WO2013093862A3 ARCHITECTURE OF A LOW BANDWIDTH PREDISTORTION SYSTEM FOR NON-LINEAR RF COMPONENTS 审中-公开
标题翻译：用于非线性RF组件的低带宽预测系统的架构
公开(公告)号：WO2013093862A3
公开(公告)日：2013-08-15
申请号：PCT/IB2012057569
申请日：2012-12-20
申请人： ERICSSON TELEFON AB L M
发明人： BAI CHUNLONG , JIAN CHUNYUN , SICH EDWARD
IPC分类号： H04B1/04 , H03F1/32
CPC分类号： H03F3/245 , H03F1/3241 , H03F1/3247 , H03F1/3258 , H03F3/195 , H03F2201/3209 , H03F2201/3212 , H03F2201/3224 , H04B1/0475 , H04B2001/0425
摘要： Systems and methods for compensating for non-linearity of a non-linear subsystem using predistortion are disclosed. In one embodiment, a system includes a non-linear subsystem and a predistorter configured to effect predistortion of an input signal of the non-linear subsystem such that the predistortion compensates for a non-linear characteristic of the non-linear subsystem. In addition, the system includes a narrowband filter that filters a feedback signal that is representative of an output signal of the non-linear subsystem to provide a filtered feedback signal, and an adaptor that adaptively configures the predistorter based on the filtered feedback signal and a reference signal that is representative of an input signal of the non-linear subsystem. By utilizing the filtered feedback signal, rather than the feedback signal, a complexity, and therefore, cost of the adaptor is substantially reduced.
摘要翻译：公开了使用预失真来补偿非线性子系统的非线性的系统和方法。在一个实施例中，系统包括非线性子系统和预失真器，其被配置为实现非线性子系统的输入信号的预失真，使得预失真补偿非线性子系统的非线性特性。另外，该系统包括滤波器，该滤波器对代表非线性子系统的输出信号的反馈信号进行滤波以提供经过滤波的反馈信号;以及适配器，其基于经滤波的反馈信号自适应地配置预失真器，参考信号代表非线性子系统的输入信号。通过利用经过滤波的反馈信号而不是反馈信号，适配器的复杂性因此大大降低。

10. 发明申请

WO2013074890A1 SYSTEM LINEARIZATION 审中-公开
标题翻译：系统线性化
公开(公告)号：WO2013074890A1
公开(公告)日：2013-05-23
申请号：PCT/US2012/065459
申请日：2012-11-16
申请人： ANALOG DEVICES, INC.
发明人： WEBER, Theophane , VIGODA, Benjamin , PRATT, Patrick , PARK, Joshua
IPC分类号： H03F1/32
CPC分类号： H03F1/3247 , H03F1/3258 , H03F1/3282 , H03F2201/3209 , H03F2201/3224
摘要： A method for linearizing a non-linear system element includes acquiring data representing inputs and corresponding outputs of the non-linear system element. A model parameter estimation procedure is applied to the acquired data to determine model parameters of a model characterizing input-output characteristics of the non-linear element. An input signal representing a desired output signal of the non-linear element is accepted and processed to form a modified input signal according to the determined model parameters. The processing includes, for each of a series of successive samples of the input signal, applying an iterative procedure to determining a sample of the modified input signal according to a predicted output of the model of the non-linear element. The modified input signal is provided for application to the input of the non-linear element.
摘要翻译：线性化非线性系统元件的方法包括获取表示非线性系统元件的输入和相应输出的数据。将模型参数估计程序应用于所获取的数据，以确定表征非线性元素的输入 - 输出特性的模型的模型参数。代表非线性元件的期望输出信号的输入信号被接受并被处理以根据所确定的模型参数形成经修改的输入信号。该处理包括对于输入信号的一系列连续样本中的每一个，根据非线性元件的模型的预测输出，应用迭代过程来确定修改的输入信号的样本。修改的输入信号被提供用于应用于非线性元件的输入。

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