公开(公告)号：US08903015B2

公开(公告)日：2014-12-02

申请号：US13301479

申请日：2011-11-21

申请人： Khalil Haddad

发明人： Khalil Haddad

IPC分类号： H04L25/49 ,  H03F1/32

CPC分类号： H03F1/3294 ,  H03F1/3247 ,  H03F2201/3224 ,  H03F2201/3233

摘要： A method used in a transmitting device comprising a non-linear amplifier and a digital predistortion (DPD) circuit. The method updates real and imaginary look-up tables used by the DPD. The method comprises: i) time-aligning a complex input signal, A, and a complex output signal, E. Signal A is a scan from 0 to a maximum value comprising N discrete points and signal E also comprises N discrete points. The method comprises: ii) performing an array division of A/E=(Yr, Yi), where Yr and Yi are the real and imaginary components, respectively; and iii) computing a real curve and an imaginary curve using curve-fitting algorithms that best fit the data with coordinates (|A|, Yr) and (|A|, Yi). The method stores the real curve in a real lookup table (LUT) and the imaginary curve in an imaginary lookup table (LUT). The method iteratively updates the real LUT and the imaginary LUT.

摘要翻译： 一种在包括非线性放大器和数字预失真（DPD）电路的发送设备中使用的方法。 该方法更新DPD使用的实数和虚构查找表。 该方法包括：i）对复数输入信号A和复合输出信号E进行时间对准。信号A是从0到包括N个离散点的最大值的扫描，信号E还包括N个离散点。 该方法包括：ii）分别执行A / E =（Yr，Yi）的阵列除法，其中Yr和Yi分别为实部和虚分量; 以及iii）使用最佳拟合数据与坐标（| A |，Yr）和（| A |，Yi）的曲线拟合算法来计算实曲线和虚曲线。 该方法将真实曲线存储在实际查找表（LUT）中，并将虚拟曲线存储在虚拟查找表（LUT）中。 该方法迭代地更新了实际的LUT和虚数的LUT。

公开(公告)号：US20140306762A1

公开(公告)日：2014-10-16

申请号：US14245190

申请日：2014-04-04

申请人： DALI SYSTEMS CO. LTD.

发明人： Dali Yang ,  Jia Yang

IPC分类号： H03F1/32 ,  H03F3/24 ,  H03F3/195

CPC分类号： H04L27/368 ,  H03F1/3247 ,  H03F3/189 ,  H03F3/19 ,  H03F3/195 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2201/3224 ,  H03F2201/3227 ,  H03F2201/3233 ,  H04B1/0475 ,  H04L1/0043 ,  H04L1/0044 ,  H04L27/367 ,  H04W52/52

摘要： A power amplifier system includes an input operable to receive an original value that reflects information to be communicated and an address data former operable to generate a digital lookup table key. The power amplifier system also includes a predistortion lookup table coupled to the address data former and a power amplifier having an output and coupled to the predistortion lookup table. The power amplifier system further includes a feedback loop providing a signal associated with the output of the power amplifier to the predistortion lookup table and a switch disposed in the feedback loop and operable to disconnect the predistortion lookup table from the output of the power amplifier.

摘要翻译： 功率放大器系统包括可操作以接收反映要传送的信息的原始值的输入和可操作以产生数字查找表密钥的地址数据表。 功率放大器系统还包括耦合到地址数据形成器的预失真查找表和具有输出并耦合到预失真查找表的功率放大器。 功率放大器系统还包括反馈回路，其将与功率放大器的输出相关联的信号提供给预失真查找表，以及设置在反馈回路中的开关，用于将预失真查找表与功率放大器的输出断开。

公开(公告)号：US08843089B2

公开(公告)日：2014-09-23

申请号：US13908212

申请日：2013-06-03

申请人： Research In Motion Limited

发明人： Dorian Davies

IPC分类号： H04B1/04 ,  H03F1/32

CPC分类号： H03F1/3241 ,  H03F1/3247 ,  H03F2201/3233

摘要： Coefficients of a pre-distorter are determined for distortion correction of a signal amplified by a radio frequency amplifier by sampling the signal at the pre-distorter input to generate a plurality of input samples and sampling the signal at the amplifier output to generate a plurality of output samples, each of the output samples corresponding to one of the input samples, calculating a figure of merit for one or more of the input samples on the basis of the one or more input samples, selectively updating a previously selected set of input samples with the one or more input samples on the basis of the calculated figure of merit, whereby to generate an updated selected set and determining the coefficients of the pre-distorter on the basis of the input samples in the updated selected set and the corresponding output samples.

摘要翻译： 确定预失真器的系数用于通过对预失真器输入端处的信号进行采样来产生多个输入采样并在放大器输出端对采样信号进行采样，由射频放大器放大的信号的失真校正，以产生多个 输出样本，每个输出样本对应于一个输入样本，基于一个或多个输入样本计算一个或多个输入样本的品质因数，选择性地更新先前选择的输入样本集合， 基于所计算的品质因数来生成一个或多个输入样本，由此产生更新的选定集合，并且基于更新的选定集合中的输入样本和相应的输出样本来确定预失真器的系数。

公开(公告)号：US08843088B2

公开(公告)日：2014-09-23

申请号：US13540666

申请日：2012-07-03

申请人： John-Peter van Zelm ,  Peter Rashev

发明人： John-Peter van Zelm ,  Peter Rashev

IPC分类号： H04B1/04 ,  H04K1/02

CPC分类号： H03F1/3247 ,  H03F3/245 ,  H03F3/68 ,  H03F2201/3233 ,  H04L27/2614 ,  H04L27/368

摘要： Included is a radio transmission system comprising a plurality of power amplifiers (PAs); a plurality of Volterra Engine (VE) linearizers corresponding to the PAs; a plurality of feedback loops corresponding to the PAs; at least one digital hybrid matrix (DHM) coupled to the VE linearizers; and an analog hybrid matrix (AHM) coupled to the PAs, wherein the feedback loops are connected to the AHM and the VE linearizers but not to the PAs to reduce the number of feedback loops. Also included is a radio system comprising a plurality of PAs; a Volterra DHM (VDHM) coupled to the PAs; a plurality of feedback loops corresponding to the PAs; and an AHM coupled to the PAs, wherein the feedback loops are connected to the AHM but not to the PAs to reduce the number of feedback loops.

摘要翻译： 包括包括多个功率放大器（PA）的无线电传输系统; 对应于PA的多个Volterra引擎（VE）线性化器; 对应于PA的多个反馈回路; 耦合到所述VE线性化器的至少一个数字混合矩阵（DHM）; 以及耦合到PA的模拟混合矩阵（AHM），其中反馈回路连接到AHM和VE线性化电路，而不连接到PA以减少反馈回路的数量。 还包括包括多个PA的无线电系统; 耦合到PA的Volterra DHM（VDHM）; 对应于PA的多个反馈回路; 以及耦合到PA的AHM，其中反馈回路连接到AHM，而不连接到PA以减少反馈回路的数量。

公开(公告)号：US08787487B2

公开(公告)日：2014-07-22

申请号：US13461928

申请日：2012-05-02

申请人： Kazuo Nagatani ,  Hiroyoshi Ishikawa ,  Nobukazu Fudaba ,  Yuichi Utsunomiya

发明人： Kazuo Nagatani ,  Hiroyoshi Ishikawa ,  Nobukazu Fudaba ,  Yuichi Utsunomiya

IPC分类号： H04L27/10 ,  H04J3/16 ,  G01V3/38 ,  H04L25/49

CPC分类号： H04L25/49 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/19 ,  H03F3/24 ,  H03F2200/336 ,  H03F2201/3212 ,  H03F2201/3233 ,  H04B1/0475 ,  H04B2001/0425 ,  H04L25/03343 ,  H04L27/2614 ,  H04L27/368

摘要： A distortion compensation device which reduces a distortion of an amplifier which is added to an output signal of the amplifier, the distortion compensation device including: a plurality of distortion compensation coefficient storage circuits which stores a plurality of distortion compensation coefficients and outputs the distortion compensation coefficients according to an amplitude of an input signal of the amplifier, a distortion compensating processing circuit which adds the distortion compensation coefficient output from each of the plurality of distortion compensation coefficient storage circuits to the input signal of the amplifier, and a distortion compensation coefficient updating circuit which performs weighting processing on the distortion compensation coefficient output from each of the plurality of distortion compensation coefficient storage circuits to reduce the distortion compensation coefficient and which calculates an update value of the distortion compensation coefficient by using the distortion compensation coefficient which is subjected to the weighting processing.

摘要翻译： 一种失真补偿装置，其减少了放大器的失真，该放大器被加到放大器的输出信号上，失真补偿装置包括：多个失真补偿系数存储电路，存储多个失真补偿系数，并输出失真补偿系数 根据放大器的输入信号的幅度，将从多个失真补偿系数存储电路输出的失真补偿系数与放大器的输入信号相加的失真补偿处理电路和失真补偿系数更新电路 对从多个失真补偿系数存储电路中的每一个输出的失真补偿系数进行加权处理，以减小失真补偿系数，并计算失真补偿系数的更新值 通过使用经受加权处理的失真补偿系数。

公开(公告)号：US20140184334A1

公开(公告)日：2014-07-03

申请号：US13830070

申请日：2013-03-14

申请人： PEREGRINE SEMICONDUCTOR CORPORATION

发明人： Dan William Nobbe ,  Jeffrey A. Dykstra ,  Chris Olson ,  James S. Cable

IPC分类号： H03F1/02 ,  H03F3/68 ,  H03F1/32

CPC分类号： H03F1/0205 ,  H03F1/0216 ,  H03F1/0222 ,  H03F1/0227 ,  H03F1/0244 ,  H03F1/025 ,  H03F1/0277 ,  H03F1/223 ,  H03F1/3247 ,  H03F1/3282 ,  H03F1/56 ,  H03F3/191 ,  H03F3/193 ,  H03F3/195 ,  H03F3/21 ,  H03F3/211 ,  H03F3/24 ,  H03F3/45179 ,  H03F3/45183 ,  H03F3/45188 ,  H03F2200/102 ,  H03F2200/108 ,  H03F2200/129 ,  H03F2200/15 ,  H03F2200/18 ,  H03F2200/213 ,  H03F2200/222 ,  H03F2200/336 ,  H03F2200/387 ,  H03F2200/408 ,  H03F2200/411 ,  H03F2200/451 ,  H03F2200/534 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2200/546 ,  H03F2200/78 ,  H03F2201/3233 ,  H03F2203/45112 ,  H03F2203/45366 ,  H03F2203/45544 ,  H03F2203/45638 ,  H03F2203/45731

摘要： Optimization methods via various circuital arrangements for amplifier with variable supply power are presented. In one embodiment, a switch can be controlled to include or exclude a feedback network in a feedback path to the amplifier to adjust a response of the amplifier dependent on a region of operation of the amplifier arrangement (e.g. linear region or compression region).

摘要翻译： 提出了通过各种可变电源功率放大器电路布置的优化方法。 在一个实施例中，可以控制开关以包括或排除到放大器的反馈路径中的反馈网络，以根据放大器装置的操作区域（例如，线性区域或压缩区域）来调整放大器的响应。

公开(公告)号：US08737526B2

公开(公告)日：2014-05-27

申请号：US12827952

申请日：2010-06-30

申请人： Philip David Coan ,  Paul J. Draxler

发明人： Philip David Coan ,  Paul J. Draxler

IPC分类号： H04L25/49 ,  H04L25/03 ,  H04K1/02

CPC分类号： H03F1/3247 ,  H03F1/3241 ,  H03F1/3282 ,  H03F2200/336 ,  H03F2201/3212 ,  H03F2201/3233 ,  H04B1/0475 ,  H04B2001/0425 ,  H04L27/368

摘要： Exemplary embodiments of the invention include a transmitter system configured to predistort an input signal to generate a target output signal. An exemplary transmitter system includes a forward path including a predistortion device coupled with an amplifier, the forward path configured for predistorting an input signal to the predistortion device in response to a phase error compensation signal and an amplitude error compensation signal in order to generate a desired output signal for the output signal of the amplifier, and a feedback path including a processor configured for generating the phase error compensation signal and the amplitude error compensation signal based on a comparison of the input signal with phase and amplitude information of the output signal of the amplifier, wherein the phase and amplitude information of the amplifier are transmitted to the processor on a single path of the feedback path. Other methods and apparatuses are also presented herein.

摘要翻译： 本发明的示例性实施例包括被配置为预失真输入信号以产生目标输出信号的发射机系统。 示例性发射机系统包括包括与放大器耦合的预失真装置的前向路径，所述前向路径被配置为响应于相位误差补偿信号和幅度误差补偿信号将输入信号预失真到预失真装置，以便产生期望的 输出信号，以及包括处理器的反馈路径，该处理器被配置为基于输入信号与输入信号的输出信号的相位和幅度信息的比较来产生相位误差补偿信号和幅度误差补偿信号 放大器，其中放大器的相位和幅度信息在反馈路径的单个路径上被发送到处理器。 本文还给出了其它方法和装置。

公开(公告)号：US20140133527A1

公开(公告)日：2014-05-15

申请号：US13674867

申请日：2012-11-12

申请人： Xilinx, Inc.

发明人： Christopher H. Dick

IPC分类号： H04B7/005

CPC分类号： H04B7/005 ,  H03F1/3247 ,  H03F3/189 ,  H03F3/245 ,  H03F2201/3212 ,  H03F2201/3233

摘要： A method of performing digital pre-distortion in a communication network is described. The method comprises implementing a transceiver in the communication network, the transceiver enabling the transfer of communication signals in the communication network by way of a wireless communication channel; sampling signals, at the transceiver, associated with a transmit signal which are necessary to perform digital pre-distortion; providing the sampled signals to a remote computer; and generating, at the remote computer, parameters to be applied to a digital pre-distortion circuit of the transceiver. A communication network configured to enable digital pre-distortion is also described.

摘要翻译： 描述了在通信网络中执行数字预失真的方法。 该方法包括在通信网络中实现收发信机，收发机能够通过无线通信信道传送通信网络中的通信信号; 在收发器处采样信号与执行数字预失真所必需的发射信号相关联; 将采样信号提供给远程计算机; 以及在所述远程计算机处产生要应用于所述收发器的数字预失真电路的参数。 还描述了被配置为实现数字预失真的通信网络。

公开(公告)号：US08693962B2

公开(公告)日：2014-04-08

申请号：US12203064

申请日：2008-09-02

申请人： Dongtai Liu ,  Dali Yang ,  James Anderson

发明人： Dongtai Liu ,  Dali Yang ,  James Anderson

IPC分类号： H04B1/04

CPC分类号： H04B1/0475 ,  H03F1/3247 ,  H03F3/19 ,  H03F3/21 ,  H03F3/24 ,  H03F2200/451 ,  H03F2200/57 ,  H03F2201/3215 ,  H03F2201/3233 ,  H04B2001/0425 ,  Y02D70/00

摘要： An embodiment of the invention is a predistortion approach to linearize a power amplifier by using one or more analog multiplier(s) and a DSP-based processor. For the analog embodiment, the inherent nature of the analog circuitries allows digital predistortion processing structured directly at the RF band, and enables a single power amplifier to support multi-modulation schemes, multi-carriers and multi-channels. As a result, the predistortion architecture is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems. The wireless system performance can be improved and upgraded just by using the new PA module rather than change or rebuild new subsystem in existing base station. The analog embodiment can also mix and match its analog multipliers with other analog components such as phase splitters, phase shifters, attenuators, filters, couplers, mixers, low-noise amplifiers, buffers, envelope detectors, and etc., to provide additional features.

摘要翻译： 本发明的一个实施例是通过使用一个或多个模拟乘法器和基于DSP的处理器对功率放大器进行线性化的预失真方法。 对于模拟实施例，模拟电路的固有特性允许直接在RF频带处构成的数字预失真处理，并且使单个功率放大器能够支持多调制方案，多载波和多信道。 因此，预失真架构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。 无线系统性能可以通过使用新的PA模块来改进和升级，而不是改变或重建现有基站中的新子系统。 模拟实施例还可以将其模拟乘法器与诸如相位分离器，移相器，衰减器，滤波器，耦合器，混频器，低噪声放大器，缓冲器，包络检测器等的其它模拟组件混合并匹配，以提供附加特征。

公开(公告)号：US20140075162A1

公开(公告)日：2014-03-13

申请号：US13701397

申请日：2012-10-26

申请人： LSI Corporation

发明人： Kameran Azadet ,  Albert Molina ,  Joseph H. Othmer ,  Parakalan Venkataraghavan ,  Meng-Lin Yu ,  Joseph Williams

IPC分类号： G06F9/30

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： A digital processor is provided having an instruction set with a complex exponential function. The digital processor evaluates a complex exponential function for an input value, x, by obtaining a complex exponential software instruction having the input value, x, as an input; and in response to the complex exponential software instruction: invoking at least one complex exponential functional unit that implements complex exponential software instructions to apply the complex exponential function to the input value, x; and generating an output corresponding to the complex exponential of the input value, x. A complex exponential function for an input value, x, can be evaluated by wrapping the input value to maintain a given range; computing a coarse approximation angle using a look-up table; scaling the coarse approximation angle to obtain an angle from 0 to θ; and computing a fine corrective value using a polynomial approximation.

摘要翻译： 提供了具有具有复指数函数的指令集的数字处理器。 数字处理器通过获得具有输入值x的复数指数软件指令作为输入来评估输入值x的复指数函数; 并且响应于复杂的指数软件指令：调用至少一个复数指数函数单元，其执行复指数软件指令以将复指数函数应用于输入值x; 并产生与输入值x的复指数相对应的输出。 输入值x的复数指数函数可以通过包装输入值来保持给定范围来评估; 使用查找表计算粗近似角度; 缩放粗近似角度以获得从0到θ的角度; 以及使用多项式近似计算精细校正值。