专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

141. 发明申请

US20160126903A1 WEIGHTED MEMORY POLYNOMIAL METHOD AND SYSTEM FOR POWER AMPLIFIERS PREDISTORTION 有权
标题翻译：用于功率放大器预测的加权记忆多项式和系统
公开(公告)号：US20160126903A1
公开(公告)日：2016-05-05
申请号：US14533486
申请日：2014-11-05
申请人： King Fahd University of Petroleum and Minerals
发明人： Abdalla E. ABDELRAHMAN , Oualid HAMMI , Azzedine ZERGUINE
IPC分类号： H03F1/32 , H03F3/21 , H03F1/02
CPC分类号： H03F1/3247 , H03F1/0205 , H03F1/3241 , H03F1/3258 , H03F3/19 , H03F3/21 , H03F3/245 , H03F2200/451 , H03F2201/3224 , H03F2201/3231 , H04B1/0475 , H04B2001/0425
摘要： A system and method for linearizing a power amplifier using digital predistortion technique is provided including processing circuitry, the processing circuitry configured to apply a digital predistortion function based on a weighted static polynomial function, a weighted dynamic polynomial function and a threshold parameter which splits the nonlinear transfer characteristics of the device under test into a region where the static nonlinearity predominates and a region where the dynamic distortions predominate.
摘要翻译：提供了一种使用数字预失真技术线性化功率放大器的系统和方法，包括处理电路，所述处理电路被配置为基于加权静态多项式函数应用数字预失真函数，加权动态多项式函数和阈值参数，其分割非线性将被测器件的传输特性转化为静态非线性占优势的区域以及动态失真占优势的区域。

142. 发明申请

US20160072647A1 DIRECT DIGITAL SYNTHESIS OF SIGNALS USING MAXIMUM LIKELIHOOD BIT-STREAM ENCODING 审中-公开
标题翻译：使用最大似然比特流编码的信号的直接数字合成
公开(公告)号：US20160072647A1
公开(公告)日：2016-03-10
申请号：US14944184
申请日：2015-11-17
申请人： Intel Corporation
发明人： Kameran Azadet , Steven C. Pinault
IPC分类号： H04L25/03
CPC分类号： G06F9/3001 , G06F5/01 , G06F9/30036 , G06F17/15 , H03F1/0288 , H03F1/3241 , H03F1/3258 , H03F3/189 , H03F3/24 , H03F2200/336 , H03F2201/3209 , H03F2201/3212 , H03F2201/3224 , H03F2201/3233 , H03H17/06 , H03M3/30 , H04B1/0003 , H04B1/0475 , H04B1/62 , H04B2001/0408 , H04L1/0054 , H04L25/02 , H04L25/03 , H04L25/03178 , H04L25/03216 , H04L25/4917 , H04L27/2334
摘要： Maximum likelihood bit-stream generation and detection techniques are provided using the M-algorithm and Infinite Impulse Response (IIR) filtering. The M-Algorithm is applied to a target input signal X to perform Maximum Likelihood Sequence Estimation on the target input signal X to produce a digital bit stream B, such that after filtering by an IIR filter, the produced digital stream Y produces an error signal satisfying one or more predefined requirements. The predefined requirements comprise, for example, a substantially minimum error. In an exemplary bit detection implementation, the target input signal X comprises an observed analog signal and the produced digital stream Y comprises a digitized output of a receive channel corresponding to a transmitted bit stream. In an exemplary bit stream generation implementation, the target input signal X comprises a desired transmit signal and the produced digital stream Y comprises an estimate of the desired transmit signal.
摘要翻译：使用M算法和无限脉冲响应（IIR）滤波提供最大似然比特流生成和检测技术。将M算法应用于目标输入信号X以对目标输入信号X执行最大似然序列估计，以产生数字比特流B，使得在由IIR滤波器滤波之后，产生的数字流Y产生误差信号满足一个或多个预定义的要求。预定义的要求包括例如基本上最小的误差。在示例性比特检测实现中，目标输入信号X包括观察到的模拟信号，并且所产生的数字流Y包括与发送的比特流相对应的接收信道的数字化输出。在示例性比特流生成实现中，目标输入信号X包括期望的发射信号，并且所产生的数字流Y包括所需发射信号的估计。

143. 发明授权

US09143091B2 Distortion compensating apparatus, transmitter, distortion compensating method, and transfer function calculating method 有权
标题翻译：失真补偿装置，发射机，失真补偿方法和传递函数计算方法
公开(公告)号：US09143091B2
公开(公告)日：2015-09-22
申请号：US14060672
申请日：2013-10-23
申请人： FUJITSU LIMITED
发明人： Yasuyuki Oishi , Eisuke Fukuda , Yoshimasa Daido
IPC分类号： H03F1/32 , H03F3/24 , H04L27/36 , H04L27/26
CPC分类号： H03F1/3247 , H03F3/24 , H03F2201/3224 , H04L27/2614 , H04L27/368
摘要： An amplifier module is expressed by a model having a first filter that is a linear time-invariant filter for limiting the bandwidth of an input signal, an amplifier unit that amplifies a signal output from the first filter, and a second filter that is a linear time-invariant filter for limiting the bandwidth of a signal output from the amplifier unit. A memoryless amplifier unit calculates an output from the amplifier module when being memoryless, using AM-to-AM distortion and AM-to-PM distortion of the amplifier unit. A cross-correlation calculating unit calculates a correlation between the signal output from the amplifier module and the output calculated by the memoryless amplifier unit and calculates an estimate of a transfer function of the first filter and the second filter. A distortion compensating unit compensates the input signal based on the estimate of the transfer function and outputs the signal to the amplifier module.
摘要翻译：放大器模块由具有第一滤波器的模型表示，该第一滤波器是用于限制输入信号的带宽的线性时间不变滤波器，放大从第一滤波器输出的信号的放大器单元和作为线性的第二滤波器时间不变滤波器，用于限制从放大器单元输出的信号的带宽。无记忆放大器单元使用放大器单元的AM-to-AM失真和AM-to-PM失真来计算无记忆时放大器模块的输出。互相关计算单元计算从放大器模块输出的信号与由无记忆放大器单元计算的输出之间的相关性，并计算第一滤波器和第二滤波器的传递函数的估计。失真补偿单元基于传递函数的估计补偿输入信号，并将该信号输出到放大器模块。

144. 发明申请

US20150160279A1 QUANTITATIVE CHARACTERIZATION OF NONLINEARITY AND MEMORY EFFECT IN NONLINEAR CIRCUITS 审中-公开
标题翻译：非线性电路中非线性和记忆效应的量化特征
公开(公告)号：US20150160279A1
公开(公告)日：2015-06-11
申请号：US14564071
申请日：2014-12-08
申请人： QUALCOMM Incorporated
发明人： Hao Zhou , Feipeng Wang , Haojen Cheng , Volodymyr Rakytyanskyy
IPC分类号： G01R29/26 , H03F1/32
CPC分类号： G01R29/26 , H03F1/3247 , H03F3/189 , H03F3/245 , H03F2201/3209 , H03F2201/3224 , H03F2201/3233
摘要： 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.
摘要翻译：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。

145. 发明申请

US20150078484A1 Predistortion Correction Method, Predistortion Correction Apparatus, Transmitter, and Base Station 有权
标题翻译：预失真校正方法，预失真校正装置，变送器和基站
公开(公告)号：US20150078484A1
公开(公告)日：2015-03-19
申请号：US14552056
申请日：2014-11-24
申请人： Huawei Technologies Co., Ltd.
发明人： Yuxiang Xiao , Erni Zhu , Anding Zhu
IPC分类号： H03F1/32 , H03F3/19 , H04B1/04 , H03F3/24
CPC分类号： H03F1/3247 , H03F1/3241 , H03F1/3252 , H03F1/3258 , H03F3/19 , H03F3/24 , H03F3/245 , H03F2200/36 , H03F2200/39 , H03F2200/451 , H03F2201/3209 , H03F2201/3215 , H03F2201/3224 , H03F2201/3227 , H04B1/0475 , H04B2001/0408 , H04B2001/0425 , H04L27/368
摘要： A predistortion correction method, a predistortion correction apparatus, a transmitter, and a base station are provided. The method includes: performing, based on a digital predistortion model, non-linear processing on an input transmit signal to obtain higher-order distortion time-domain signals; and obtaining, after performing processing on the higher-order distortion time-domain signals, a predistortion signal to be input to a power amplifier, where a process of converting the higher-order distortion time-domain signals to the predistortion signal includes bandwidth limitation processing, so that the predistortion signal to be input to the power amplifier is a predistortion signal within a preset bandwidth. Embodiments of the present invention can ensure predistortion accuracy, and can also reduce a requirement for a bandwidth and a sampling rate of a feedback channel, thereby reducing a predistortion cost.
摘要翻译：提供了预失真校正方法，预失真校正装置，发射机和基站。该方法包括：基于数字预失真模型对输入发射信号进行非线性处理，以获得更高阶失真时域信号; 在对高阶失真时域信号执行处理之后，获得要输入到功率放大器的预失真信号，其中将高阶失真时域信号转换为预失真信号的处理包括带宽限制处理，使得要输入到功率放大器的预失真信号是预设带宽内的预失真信号。本发明的实施例可以确保预失真精度，并且还可以减少对反馈信道的带宽和采样率的要求，从而降低预失真成本。

146. 发明申请

US20150054585A1 PRE-DISTORTION METHOD, ASSOCIATED APPARATUS AND NON-TRANSITORY MACHINE READABLE MEDIUM 有权
标题翻译：预失效方法，相关设备和非接收机可读介质
公开(公告)号：US20150054585A1
公开(公告)日：2015-02-26
申请号：US14458244
申请日：2014-08-12
申请人： Realtek Semiconductor Corp.
发明人： Yuan-Shuo Chang
IPC分类号： H03F3/19 , H03F1/32 , H03F3/24
CPC分类号： H03F3/19 , H03F1/3247 , H03F1/3258 , H03F3/245 , H03F2200/451 , H03F2201/3224 , H03F2201/3233
摘要： A pre-distortion method includes: receiving an input data; and obtaining a pre-distortion output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a following power amplifier; and multiplying a reciprocal of a pre-distortion ratio of the output of the power amplifier to the input data by the output of the power amplifier. A pre-distortion apparatus includes a receiver, a pre-distortion unit and a gain compensating unit. The receiver is utilized for receiving an input data. The pre-distortion unit is utilized for obtaining a pre-distortion output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a following power amplifier. The gain compensating unit is utilized for multiplying a reciprocal of a pre-distortion ratio of the output of the power amplifier to the input data by the output of the power amplifier.
摘要翻译：预失真方法包括：接收输入数据; 以及通过将所述输入数据输入到预失真功能中来获得预失真输出，其中所述预失真功能根据随后的功率放大器确定; 并且通过功率放大器的输出将功率放大器的输出的预失真比的倒数与输入数据相乘。预失真装置包括接收机，预失真单元和增益补偿单元。接收机用于接收输入数据。预失真单元用于通过将输入数据输入到预失真功能中来获得预失真输出，其中根据随后的功率放大器确定预失真功能。增益补偿单元用于通过功率放大器的输出将功率放大器的输出的预失真比的倒数与输入数据相乘。

147. 发明申请

US20140327481A1 DIGITAL HYBRID MODE POWER AMPLIFIER SYSTEM 有权
标题翻译：数字混合模式功率放大器系统
公开(公告)号：US20140327481A1
公开(公告)日：2014-11-06
申请号：US14271881
申请日：2014-05-07
申请人： DALI SYSTEMS CO., LTD.
发明人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Jong Heon Kim , Dali Yang
IPC分类号： H03F1/32 , H03F3/20 , H03F3/19
CPC分类号： H03F1/3247 , H03F1/3258 , H03F3/19 , H03F3/20 , H03F3/24 , H03F2200/129 , H03F2200/451 , H03F2201/3224 , H03F2201/3227 , H03F2201/3233
摘要： A RF-digital hybrid mode power amplifier system for achieving high efficiency and high linearity in wideband communication systems is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier in the RF domain. The power amplifier characteristics such as variation of linearity and asymmetric distortion of the amplifier output signal are monitored by the narrowband feedback path and controlled by the adaptation algorithm in a digital module. Therefore, the present invention could compensate the nonlinearities as well as memory effects of the power amplifier systems and also improve performances, in terms of power added efficiency, adjacent channel leakage ratio and peak-to-average power ratio. The present disclosure enables a power amplifier system to be field reconfigurable and support multi-modulation schemes (modulation agnostic), multi-carriers and multi-channels. As a result, the digital hybrid mode power amplifier system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems, where baseband I-Q signal information is not readily available.
摘要翻译：公开了一种用于在宽带通信系统中实现高效率和高线性度的RF数字混合模式功率放大器系统。本发明基于对RF域中的功率放大器进行线性化的自适应数字预失真的方法。诸如放大器输出信号的线性度和不对称失真的功率放大器特性由窄带反馈路径监测并由数字模块中的自适应算法控制。因此，本发明可以补偿功率放大器系统的非线性和存储器效应，并且在功率附加效率，相邻信道泄漏比和峰均功率比方面也提高了性能。本公开使得功率放大器系统能够是现场可重新配置的并且支持多调制方案（调制不可知），多载波和多信道。结果，数字混合模式功率放大器系统特别适用于诸如基站，中继器和室内信号覆盖系统之类的无线传输系统，其中基带I-Q信号信息不容易获得。

148. 发明授权

US08855234B2 Method and system for baseband predistortion linearization in multi-channel wideband communications systems 有权
标题翻译：多通道宽带通信系统中基带预失真线性化的方法和系统
公开(公告)号：US08855234B2
公开(公告)日：2014-10-07
申请号：US13887133
申请日：2013-05-03
申请人： Dali Systems Co. Ltd.
发明人： Wan Jong Kim , Kyoung Joon Cho , Jong Heon Kim , Shawn Patrick Stapleton
IPC分类号： H04K1/02 , H04W24/02 , H04L27/36 , H04L25/03 , H03F1/32 , H03F3/24 , H04B1/04
CPC分类号： H04W40/02 , H03F1/3247 , H03F3/24 , H03F2200/336 , H03F2200/57 , H03F2201/3224 , H03F2201/3233 , H04B1/0475 , H04B7/022 , H04B2001/0425 , H04L25/03343 , H04L27/2618 , H04L27/362 , H04L2025/03414 , H04W24/02 , H04W24/04 , H04W40/00 , H04W72/04 , H04W72/0453
摘要： An efficient baseband predistortion linearization method for reducing the spectral regrowth and compensating memory effects in wideband communication systems using effective multiplexing modulation technique such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. The present invention is based on the method of piecewise pre-equalized lookup table based predistortion, which is a cascade of a lookup table predistortion and piecewise pre-equalizers.
摘要翻译：公开了一种使用诸如宽带码分多址和正交频分复用之类的有效复用调制技术在宽带通信系统中减少频谱再生长和补偿存储器效应的有效的基带预失真线性化方法。本发明基于基于分段预均衡查找表的预失真的方法，其是查找表预失真和分段预均衡器的级联。

149. 发明申请

US20140292406A1 Signal Predistortion for Non-Linear Amplifier 有权
标题翻译：非线性放大器的信号预失真
公开(公告)号：US20140292406A1
公开(公告)日：2014-10-02
申请号：US14232071
申请日：2011-07-13
申请人： Frank Dechen , Bjoern Jelonnek , Michael Weber
发明人： Frank Dechen , Bjoern Jelonnek , Michael Weber
IPC分类号： H03F1/32
CPC分类号： H03F1/3247 , H03F1/30 , H03F1/3241 , H03F1/3258 , H03F1/3282 , H03F3/195 , H03F3/24 , H03F2200/336 , H03F2200/447 , H03F2200/451 , H03F2201/3209 , H03F2201/3212 , H03F2201/3224 , H03F2201/3227 , H03F2201/3233 , H04L27/368
摘要： A method, apparatus, and computer program for modeling mathematically an effect of a plurality of factors on signal distortion caused by a non-linear amplifier are provided. First, there is computed a global model which incorporates a combined effect of the plurality of factors on signal distortion caused by the non-linear amplifier. Before applying the pre-distorted transmission signal to the non-linear amplifier, a transmission signal is pre-distorted with coefficients derived from the global model thus compensating for the signal distortion caused by the non-linear amplifier.
摘要翻译：提供了一种用于在数学上建模多个因素对由非线性放大器引起的信号失真的影响的方法，装置和计算机程序。首先，计算出一个全局模型，其中包含多个因素对由非线性放大器引起的信号失真的组合影响。在将预失真的发送信号应用于非线性放大器之前，利用从全局模型导出的系数对发送信号进行预失真，从而补偿由非线性放大器引起的信号失真。

150. 发明授权

US08831133B2 Recursive digital pre-distortion (DPD) 有权
标题翻译：递归数字预失真（DPD）
公开(公告)号：US08831133B2
公开(公告)日：2014-09-09
申请号：US13661357
申请日：2012-10-26
申请人： LSI Corporation
发明人： Kameran Azadet , Albert Molina
IPC分类号： H04L27/00 , H04L27/233 , H04L25/03 , H04B1/04 , H04L1/00 , G06F5/01 , H04L25/02 , G06F9/30 , H03M3/00 , H04B1/62
CPC分类号： G06F9/3001 , G06F5/01 , G06F9/30036 , G06F17/15 , H03F1/0288 , H03F1/3241 , H03F1/3258 , H03F3/189 , H03F3/24 , H03F2200/336 , H03F2201/3209 , H03F2201/3212 , H03F2201/3224 , H03F2201/3233 , H03H17/06 , H03M3/30 , H04B1/0003 , H04B1/0475 , H04B1/62 , H04B2001/0408 , H04L1/0054 , H04L25/02 , H04L25/03 , H04L25/03178 , H04L25/03216 , H04L25/4917 , H04L27/2334
摘要： Recursive digital pre-distortion (DPD) techniques are provided. Digital pre-distortion is performed by applying a signal to a recursive system to generate a state vector; providing the state vector as a feedback value to the recursive non-linear system; and applying the state vector to a second function to generate an output signal, wherein at least one of the recursive system and the second function comprise a non-linear function. The recursive non-linear system can be initialized to a known initial value. The recursive system is defined by a system of non-linear differential equations.
摘要翻译：提供递归数字预失真（DPD）技术。通过向递归系统施加信号以产生状态向量来执行数字预失真; 将状态向量作为反馈值提供给递归非线性系统; 以及将所述状态向量应用于第二函数以产生输出信号，其中所述递归系统和所述第二函数中的至少一个包括非线性函数。递归非线性系统可以初始化为已知的初始值。递归系统由非线性微分方程系统定义。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式