专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

111. 发明申请

US20080130788A1 System and method for computing parameters for a digital predistorter 有权
标题翻译：用于计算数字预失真器参数的系统和方法
公开(公告)号：US20080130788A1
公开(公告)日：2008-06-05
申请号：US11635903
申请日：2006-12-08
申请人： Gregory Clark Copeland
发明人： Gregory Clark Copeland
IPC分类号： H04L25/03
CPC分类号： H03F1/3247 , H03F1/3258 , H03F3/24 , H03F2200/321 , H03F2201/3224 , H03F2201/3233 , H04L25/03343
摘要： Digital predistortion system, methods and circuitry for adapting a predistortion system linearizing a non-linear element. The system is a multiply partitioned architecture that addresses long or “memory” effects, and separately addresses shorter duration effects. In a preferred method, the non-linear element is first modeled in software as a nonlinearity and a linearity in cascade form, preferably a Wiener model. The model is validated and adapted to minimize an observed error between the model and the non-linear element. The software model of the non-linear element is then used first to model a predistortion block that addresses short duration effects, and second to separately model a predistortion block that addresses longer duration effects. The models are software executable by an external processor in real time. Periodically the models are executed and used to update the adaptive parameters of the predistortion system without interrupting the system operation.
摘要翻译：数字预失真系统，适用线性化非线性元素的预失真系统的方法和电路。该系统是一种多重分区架构，可解决长时间或“内存”效应，并分别解决较短的持续时间效应。在优选的方法中，非线性元件首先以软件形式被建模为非线性和级联形式的线性，优选维纳模型。该模型被验证并适用于最小化模型和非线性元素之间观察到的误差。然后，首先使用非线性元素的软件模型来建模解决短持续时间效应的预失真块，其次分别建模解决较长持续时间效应的预失真块。这些型号是由外部处理器实时执行的软件。定期执行模型，并用于更新预失真系统的自适应参数，而不会中断系统操作。

112. 发明授权

US07336725B2 Digital predistortion system and method for high efficiency transmitters 有权
标题翻译：数字预失真系统和高效率发射机的方法
公开(公告)号：US07336725B2
公开(公告)日：2008-02-26
申请号：US11063297
申请日：2005-02-22
申请人： Armando Cova
发明人： Armando Cova
IPC分类号： H04L25/49
CPC分类号： H03F1/3294 , H03F1/3258 , H03F2201/3209 , H03F2201/3224 , H04L25/03343
摘要： A system for digitally linearizing the nonlinear behaviour of RF high efficiency amplifiers employing baseband predistortion techniques is disclosed. The system provides additive or multiplicative predistortion of the digital quadrature (I/Q) input signal in order to minimize distortion at the output of the amplifier. The predistorter uses a discrete-time polynomial kernel to model the inverse transfer characteristic of the amplifier, providing separate and simultaneous compensation for nonlinear static distortion, linear dynamic distortion and nonlinear dynamic effects including reactive electrical memory effects. Compensation for higher order reactive and thermal memory effects is embedded in the nonlinear dynamic compensation operation of the predistorter in an IIR filter bank. The digital predistortion system of the invention may provide broadband linearization of highly nonlinear and highly efficient RF amplification circuits including, but not limited to, dynamic load modulation amplifiers.
摘要翻译：公开了一种使用基带预失真技术对RF高效放大器的非线性行为进行数字线性化的系统。该系统提供数字正交（I / Q）输入信号的加法或乘法预失真，以便最小化放大器输出端的失真。预失真器使用离散时间多项式内核来对放大器的反向传输特性进行建模，为非线性静态失真，线性动态失真和包括无功电气记忆效应的非线性动态效应提供单独和同时的补偿。高阶无功和热记忆效应的补偿嵌入在IIR滤波器组中的预失真器的非线性动态补偿操作中。本发明的数字预失真系统可以提供高度非线性和高效的RF放大电路的宽带线性化，包括但不限于动态负载调制放大器。

113. 发明授权

US07170345B2 Predistorter 有权
标题翻译：预失真器
公开(公告)号：US07170345B2
公开(公告)日：2007-01-30
申请号：US11073694
申请日：2005-03-08
申请人： Naoki Hongo
发明人： Naoki Hongo
IPC分类号： H03F1/26
CPC分类号： H03F1/3247 , H03F1/3241 , H03F2200/105 , H03F2200/453 , H03F2200/78 , H03F2201/3209 , H03F2201/3224
摘要： To provide a predistorter compensating for distortion generated at an amplifier by inputting a signal to be inputted to the amplifier constituting an object of compensating for the distortion and previously providing the distortion to the input signal. Amplifier replica means is provided with an input/output characteristic the same as an input/output characteristic of an amplifier or an input/output characteristic approximated thereto and inputs a signal to output. Difference detecting means detects a difference between an input signal to a predistorter and an output signal from the amplifier replica means. Amplifier replica input signal changing means changes a signal inputted to the amplifier replica means such that the difference detected by the difference detecting means is reduced. Change signal outputting means outputs a signal changed by the amplifier replica input signal changing means to the amplifier.
摘要翻译：通过输入要输入到构成补偿失真的对象的放大器的信号，并且预先向输入信号提供失真，来提供补偿放大器产生的失真的预失真器。放大器复制装置具有与放大器的输入/输出特性或其近似的输入/输出特性相同的输入/输出特性，并将信号输出。差分检测装置检测来自预失真器的输入信号与来自放大器复制装置的输出信号之间的差异。放大器复制输入信号改变装置改变输入到放大器复制装置的信号，使得由差分检测装置检测的差减小。改变信号输出装置将由放大器复制输入信号改变装置改变的信号输出到放大器。

114. 发明申请

US20070018722A1 Adaptive digital pre-distortion system 有权
标题翻译：自适应数字预失真系统
公开(公告)号：US20070018722A1
公开(公告)日：2007-01-25
申请号：US11475886
申请日：2006-06-28
申请人： Peter Jaenecke
发明人： Peter Jaenecke
IPC分类号： H03F1/26
CPC分类号： H03F1/3247 , H03F1/3258 , H03F2201/3224 , H03F2201/3233 , H04L27/2623 , H04L27/368
摘要： An adaptive Digital Pre-distortion System and a method for correcting especially power amplifier memory effects. In particular, the invention relates to an electronic circuit, for amplifying an input signal, comprising: a clipping unit for generating a signal, having a reduced peak-to-average power ratio by clipping the input signal; a pre-distorter for generating a pre-distorted signal, defined by an pre-distortion algorithm which is based on the amplifier model function; a representation unit for representing the amplifier model function; a non-linear processing unit, in particular a power amplifier, for generating a processed signal, in particular by amplifying said received pre-distorted signal; a time delay unit for compensating the processing time for the pre-distorted signal generating the delayed pre-distorted signal; and a time delay cascade for delaying the said delayed pre-distorted signal, at the integer sample clocks generating the signals.
摘要翻译：一种自适应数字预失真系统和一种校正特别是功率放大器存储器效应的方法。特别地，本发明涉及一种用于放大输入信号的电子电路，包括：削波单元，用于产生信号，通过削波输入信号具有降低的峰值与平均功率比; 用于产生预失真信号的预失真器，其由基于放大器模型功能的预失真算法定义; 用于表示放大器模型功能的表示单元; 特别是通过放大所接收的预失真信号的非线性处理单元，特别是功率放大器，用于产生经处理的信号; 时间延迟单元，用于补偿产生延迟的预失真信号的预失真信号的处理时间; 以及用于在产生信号的整数采样时钟上延迟所述延迟的预失真信号的时间延迟级联。

115. 发明授权

US07106134B2 Feed forward amplifier employing bias circuit topologies for minimization of RF amplifier memory effects 有权
公开(公告)号：US07106134B2
公开(公告)日：2006-09-12
申请号：US11295926
申请日：2005-12-06
申请人： Ahmad Khanifar , Nikolai Maslennikov , Gareth Spiller
发明人： Ahmad Khanifar , Nikolai Maslennikov , Gareth Spiller
IPC分类号： H03F1/00
CPC分类号： H03F1/3241 , H03F1/0261 , H03F1/30 , H03F1/3235 , H03F3/60 , H03F2200/12 , H03F2200/15 , H03F2200/451 , H03F2201/3209 , H03F2201/3224
摘要： An RF power amplifier having reduced memory effects is disclosed. This is achieved by a novel design of the DC supply feed network to achieve low impedance across video frequencies, whilst maintaining the correct RF output matching. One or more transmission zeros are provided in the bias circuit transfer function, which are positioned in the video bandwidth so as to provide low and relatively constant impedance across the video bandwidth. Also, a parallel DC feed line may be employed to reduce impedance across the video bandwidth. The reduction in memory effects allows improved performance of predistortion linearization techniques and an implementation in a feed forward amplifier employing predistortion linearization is also disclosed.

116. 发明申请

US20060091949A1 Signal correction by predistortion 审中-公开
标题翻译：预失真信号校正
公开(公告)号：US20060091949A1
公开(公告)日：2006-05-04
申请号：US10515201
申请日：2003-05-22
申请人： Antony Smithson
发明人： Antony Smithson
IPC分类号： H03F1/26
CPC分类号： H03F1/3258 , H03F1/3247 , H03F1/3282 , H03F2201/3224
摘要： A digital predistorter comprises a module (J) for producing a counteracting signal Vm1 for combination with the input signal of a power amplifier to correct the output of the amplifier for distorting memory effects within the amplifier. The module (J) produces the counteracting signal Vm1 by convolving (see FIG. 6) non-linear functions of the input signal with impulse response characteristics related to the memory effects being corrected.
摘要翻译：数字预失真器包括用于与功率放大器的输入信号组合的用于产生反作用信号V m1的模块（J），以校正放大器的输出以使放大器内的存储器效应失真。模块（J）通过对输入信号的非线性函数进行卷积（参见图6））产生反作用信号V m1，该脉冲响应特性与正被校正的存储器效应相关。

117. 发明申请

US20050258898A1 Predistorter 有权
标题翻译：预失真器
公开(公告)号：US20050258898A1
公开(公告)日：2005-11-24
申请号：US11073694
申请日：2005-03-08
申请人： Naoki Hongo
发明人： Naoki Hongo
IPC分类号： H03F1/32 , H03F1/26
CPC分类号： H03F1/3247 , H03F1/3241 , H03F2200/105 , H03F2200/453 , H03F2200/78 , H03F2201/3209 , H03F2201/3224
摘要： To provide a predistorter compensating for distortion generated at an amplifier by inputting a signal to be inputted to the amplifier constituting an object of compensating for the distortion and previously providing the distortion to the input signal. Amplifier replica means is provided with an input/output characteristic the same as an input/output characteristic of an amplifier or an input/output characteristic approximated thereto and inputs a signal to output. Difference detecting means detects a difference between an input signal to a predistorter and an output signal from the amplifier replica means. Amplifier replica input signal changing means changes a signal inputted to the amplifier replica means such that the difference detected by the difference detecting means is reduced. Change signal outputting means outputs a signal changed by the amplifier replica input signal changing means to the amplifier.
摘要翻译：通过输入要输入到构成补偿失真的对象的放大器的信号，并且预先向输入信号提供失真，来提供补偿放大器产生的失真的预失真器。放大器复制装置具有与放大器的输入/输出特性或其近似的输入/输出特性相同的输入/输出特性，并将信号输出。差分检测装置检测来自预失真器的输入信号与来自放大器复制装置的输出信号之间的差异。放大器复制输入信号改变装置改变输入到放大器复制装置的信号，使得由差分检测装置检测的差减小。改变信号输出装置将由放大器复制输入信号改变装置改变的信号输出到放大器。

118. 发明申请

US20050068102A1 Distortion-compensated amplifier using predistortion technique 有权
标题翻译：使用预失真技术的失真补偿放大器
公开(公告)号：US20050068102A1
公开(公告)日：2005-03-31
申请号：US10947271
申请日：2004-09-23
申请人： Naoki Hongo , Tetsuhiko Miyatani , Yoshihiko Akaiwa
发明人： Naoki Hongo , Tetsuhiko Miyatani , Yoshihiko Akaiwa
IPC分类号： H03F1/32 , H03F1/26
CPC分类号： H03F1/3258 , H03F2201/3224
摘要： A memory effect distortion component compensating unit compensates for a distortion component caused by the memory effect of the amplifier by using a time difference of results from raising an input signal to even power. For example, the amplifier may include a memory effect distortion component compensating unit having an even power raising means for raising an input signal to even power, an even power raising result delaying unit for delaying a signal of a result of even power raising, an even power raising result time difference detecting unit for detecting a difference between a signal of an even power raising result and a delayed signal, an input signal multiplying unit for multiplying a signal of a detection result by an input signal, a distortion compensation coefficient multiplying unit for multiplying a signal of a multiplication result by a distortion compensation coefficient, and a distortion compensation coefficient multiplication result adding unit for adding an input signal and a signal of a multiplication result.
摘要翻译：存储效应失真分量补偿单元通过使用将输入信号提升为均匀功率的结果的时间差来补偿由放大器的存储效应引起的失真分量。例如，放大器可以包括存储效应失真分量补偿单元，其具有用于将输入信号提升为均匀功率的均匀功率提升装置，用于延迟均匀功率提升的结果的信号的均匀上电结果延迟单元，功率提升结果时间差检测单元，用于检测均匀功率提升结果的信号与延迟信号之间的差;输入信号乘法单元，用于将检测结果的信号乘以输入信号;失真补偿系数乘法单元，用于将相乘结果的信号乘以失真补偿系数，以及用于将输入信号和乘法结果的信号相加的失真补偿系数乘法结果相加结果单元。

119. 发明授权

US5923712A Method and apparatus for linear transmission by direct inverse modeling 失效
标题翻译：通过直接逆模拟线性传输的方法和装置
公开(公告)号：US5923712A
公开(公告)日：1999-07-13
申请号：US850940
申请日：1997-05-05
申请人： Robert Richard Leyendecker , Jay Jui-Chieh Chen , Armando Cova Garrido , Yan Guo , Vladimir Pavlovic , Claudio Gustavo Rey , Desmond Wai Ming Yan
发明人： Robert Richard Leyendecker , Jay Jui-Chieh Chen , Armando Cova Garrido , Yan Guo , Vladimir Pavlovic , Claudio Gustavo Rey , Desmond Wai Ming Yan
IPC分类号： H03F1/32 , H04L25/49
CPC分类号： H03F1/3247 , H03F2201/3224 , H03F2201/3233
摘要： A system for linearly transmitting an amplified output signal using predistortion whereby a straight inverse modeling scheme is used to more easily and accurately determine the inverse of the distortion caused by a power amplifier of a RF transmitter. The "inverse" of the power amplifier is directly modeled by considering the power amplifier as a signal processing block with the input and output ports reversed. As a result, the computationally intensive inversion required by conventional schemes is avoided. The predistorter system stores complex coefficients in a predistorter LUT, which are then used as the tap weights of a digital filter implementing the predistorter. The predistortion is done by a non-linear filter which incorporates both instantaneous and average envelope power or magnitude effects. The predistortion LUT is addressed as a function of the instantaneous envelope power or magnitude and past power or magnitude envelopes. This scheme takes into account the instantaneous envelope power or magnitude of the current sample and a profile of the envelope power or magnitude of previous samples to accurately compensate for modulation envelope memory effects of the power amplifier. The past powers or magnitudes provide an indication of the trajectory of the power or magnitude leading to the current power or magnitude, which enables the predistorter to more accurately compensate for the power amplifier distortion. The predistorter LUT is updated with values that are indexed as a function of the powers or magnitudes of past samples and the power or magnitude of the current sample.
摘要翻译：一种用于使用预失真线性地传输放大的输出信号的系统，由此使用直的逆建模方案来更容易且准确地确定由RF发射机的功率放大器引起的失真的倒数。通过考虑功率放大器作为输入和输出端口反转的信号处理块，直接建模功率放大器的“反向”。结果，避免了常规方案所需的计算密集型反转。预失真器系统将复数系数存储在预失真器LUT中，然后将其用作实现预失真器的数字滤波器的抽头权重。预失真由非线性滤波器完成，其包含瞬时和平均包络功率或幅度效应。预失真LUT作为瞬时包络功率或幅度以及过去功率或幅度包络的函数来寻址。该方案考虑了当前采样的瞬时包络功率或幅度以及前一采样的包络功率或幅度的曲线，以准确地补偿功率放大器的调制包络存储器效应。过去的功率或幅度提供了导致当前功率或幅度的功率或幅度的轨迹的指示，这使得预失真器能够更准确地补偿功率放大器失真。预失真器LUT被更新为按照过去采样的功率或幅度以及当前采样的功率或幅度进行索引的值。

120. 发明公开

US20240283474A1 SYSTEMS AND METHODS OF COMPENSATING A TRANSMIT SIGNAL FOR CHARGE TRAPPING EFFECTS OF A POWER AMPLIFIER 审中-公开
公开(公告)号：US20240283474A1
公开(公告)日：2024-08-22
申请号：US18569401
申请日：2022-06-08
申请人： Analog Devices International Unlimited Company
发明人： Patrick Pratt , Dong Chen , Mark Cope , Christopher Mayer , Praveen Chandrasekaran , Stephen Summerfield , Naveen Naraharisetti
IPC分类号： H04B1/04 , H03F1/32 , H03F3/24
CPC分类号： H04B1/0475 , H03F1/3258 , H03F3/245 , H03F2200/451 , H03F2201/3224 , H04B2001/0425
摘要： Systems and methods for compensating a transmit signal for charge trapping effects of a power amplifier are provided. In certain embodiments, a non-linear filter is trained based on time aligning a first set of observations taken from digital transmit data prior to conversion to a radio frequency transmit signal, and a second set of observations taken from an output of a power amplifier that amplifies the radio frequency transmit signal. In certain implementations, the first set of observations and the second set of observations are obtained without decimation. Rather, decimation is provided after timing alignment. By implementing the DPD system in this manner, signal data is not lost by decimation and more accurate timing alignment between the sets of observations is achieved.

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