公开(公告)号：WO2018182508A1

公开(公告)日：2018-10-04

申请号：PCT/SG2018/050132

申请日：2018-03-23

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： SHI, Bo ,  LEONG, Siew Weng ,  LUO, Bin ,  WANG, Wenjiang

IPC: H03F1/32

CPC classification number: H03F1/3247 ,  H03F1/3276 ,  H03F1/3282 ,  H03F1/3294 ,  H03F3/19 ,  H03F3/245 ,  H03F2200/192 ,  H03F2200/451 ,  H03F2201/3233

Abstract: An apparatus for optimizing the bias setting of a RF predistortion linearizer for a power amplifier to operate across different frequency channels is provided. The apparatus may include a radio frequency power amplifier. The apparatus may include a radio frequency predistortion linearizer that predistorts a radio frequency signal and passes the predistorted radio frequency signal to the radio frequency power amplifier for amplification. The radio frequency predistortion linearizer may be configured based on a set of bias control settings for different operating frequencies. The apparatus may include a filtering and detection component configured to monitor performance of the radio frequency power amplifier and fine-tune the set of bias control settings based on the monitored performance of the radio frequency power amplifier.

公开(公告)号：WO2014137783A2

公开(公告)日：2014-09-12

申请号：PCT/US2014019282

申请日：2014-02-28

Applicant: QUALCOMM INC

Inventor： ZHOU HAO ,  ZHANG NING

IPC: H03F1/32

CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F1/3294 ,  H04B2001/0425

Abstract: A power amplifier system including a composite digital predistorter (DPD) ensuring optimized linearity for the power amplifier is described. In this system, a digital-to-analog converter (DAC), an analog filter, a first mixer, and the power amplifier are serially coupled to the composite DPD. A second mixer, a receive gain block, and an analog-to-digital converter (ADC) are serially coupled to the output of the power amplifier. A DPD training component is coupled between the inputs of the composite DPD and the ADC. The composite DPD includes a memory-based DPD, e.g., a memory polynomial (MP) DPD, a memoryless-linearizing DPD, e.g., a look-up table (LUT) DPD, and two multiplexers.

Abstract translation: 描述了一种包括确保功率放大器的优化线性度的复合数字预失真器（DPD）的功率放大器系统。 在该系统中，数模转换器（DAC），模拟滤波器，第一混频器和功率放大器串联耦合到复合DPD。 第二混频器，接收增益模块和模数转换器（ADC）串联耦合到功率放大器的输出端。 DPD训练组件耦合在复合DPD和ADC的输入之间。 复合DPD包括基于存储器的DPD，例如存储器多项式（MP）DPD，无记忆线性化DPD，例如查找表（LUT）DPD和两个多路复用器。

公开(公告)号：WO2013136206A1

公开(公告)日：2013-09-19

申请号：PCT/IB2013/051465

申请日：2013-02-22

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  BAI, Chunlong

Inventor： BAI, Chunlong

IPC: H03F1/32 ,  H03F3/189 ,  H03F3/24 ,  H04B1/00 ,  H04B1/04 ,  H04L27/36

CPC classification number: H03F1/3247 ,  H03F1/3241 ,  H03F1/3258 ,  H03F1/3294 ,  H03F3/189 ,  H03F3/245 ,  H03F2200/111 ,  H03F2201/3212 ,  H03F2201/3233 ,  H04B1/0067 ,  H04B1/0475 ,  H04B1/0483 ,  H04B2001/0425 ,  H04L27/367

Abstract: A method and system for pre-distorting a dual band signal to compensate for distortion of a non-linear power amplifier in a radio transmitter are disclosed. In one embodiment, the first signal of the dual band signal is tuned to a first intermediate frequency to produce a first tuned signal and the second signal of the dual band signal is tuned to minus the intermediate frequency to produce a second tuned signal. A single input pre-distorter pre-distorts the sum of the first tuned signal and the second tuned signal. The coefficients of the pre-distorter are obtained from a one- dimensional look-up table.

Abstract translation: 公开了一种用于预失真双频带信号以补偿无线电发射机中的非线性功率放大器的失真的方法和系统。 在一个实施例中，将双频带信号的第一信号调谐到第一中频以产生第一调谐信号，并将双频带信号的第二信号调谐到中间频率以产生第二调谐信号。 单输入预失真器预先歪曲第一调谐信号和第二调谐信号的和。 预失真器的系数是从一维查找表中获得的。

公开(公告)号：WO2012154430A1

公开(公告)日：2012-11-15

申请号：PCT/US2012/035742

申请日：2012-04-30

Applicant: ANDREW LLC ,  CHANDRASEKARAN, Rajiv

Inventor： CHANDRASEKARAN, Rajiv

IPC: H03F1/32 ,  H03F3/195 ,  H03F3/24 ,  H04L27/36

CPC classification number: H03F3/24 ,  H03F1/3247 ,  H03F1/3294 ,  H03F3/195 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2201/3212 ,  H03F2201/3233 ,  H04L27/368

Abstract: An input signal is pre-distorted to reduce distortion resulting from subsequent signal amplification. Frequency-dependent pre-distortion is preferably implemented in combination with frequency-independent pre-distortion, where the frequency-dependent pre-distortion is generated by expanding the derivative of a product of a pre-distortion function and the input signal and then relaxing constraints on the pre-distortion function and/or on frequency- dependent filtering associated with the frequency-dependent pre-distortion. In one implementation, four different frequency-dependent pre-distortion signals are generated for the expansion using up to four different pre-distortion functions and up to four different frequency-dependent filters.

Abstract translation: 输入信号是预失真的，以减少后续信号放大产生的失真。 频率相关的预失真优选地与频率无关的预失真结合实现，其中通过扩展预失真函数和输入信号的乘积的导数然后放宽约束来产生与频率相关的预失真 关于预失真功能和/或与频率相关的预失真相关联的频率依赖滤波。 在一个实施方案中，使用最多四个不同的预失真功能和多达四个不同的频率相关滤波器来生成用于扩展的四个不同的频率相关的预失真信号。

公开(公告)号：WO2011086640A1

公开(公告)日：2011-07-21

申请号：PCT/JP2010/007339

申请日：2010-12-17

Applicant: パナソニック株式会社 ,  松浦徹

Inventor： 松浦徹

IPC: H04B1/04 ,  H03F1/02 ,  H03F1/06 ,  H03F3/24

CPC classification number: H03F1/3247 ,  H03F1/0222 ,  H03F1/3294 ,  H03F3/189 ,  H03F3/195 ,  H03F3/24 ,  H03F2200/336 ,  H03F2200/451 ,  H04B1/0475

Abstract: 　変調信号に依存せず、また、回路規模を大きくすることなく、振幅信号と位相信号との時間差を最適点に制御し、安定した特性を得ることができる送信装置、無線通信装置及び送信方法を開示する。乗算器（１７０）は、振幅信号をアナログ・デジタル変換したデジタル振幅信号と角度変調信号をアナログ・デジタル変換した信号に相当するデジタル角度変調信号とを乗算して、振幅変調器（１４０）により生成される変調信号をアナログ・デジタル変換した信号に相当するデジタル変調信号を擬似的に生成する。そして、歪み算出部（１８０）は、デジタル変調信号の歪みを算出し、制御部（１９０）は、デジタル変調信号の歪みに基づいて、遅延時間を制御し、遅延調整部（１３０）は、振幅信号が振幅変調器（１４０）に入力されるまでの遅延時間、又は、角度変調信号が振幅変調器（１４０）に入力されるまでの遅延時間を調整する。

Abstract translation: 公开了一种发射机装置，无线通信装置和发送方法，其中可以将幅度信号和相位信号之间的时间差控制到最佳点以获得独立于调制信号的稳定特性，而不增加电路规模。 乘法器（170）将通过模数转换振幅信号获得的数字幅度信号乘以数字角度调制信号，该数字角度调制信号对应于通过模数转换角度调制信号获得的信号， 人工生成对应于通过模数转换由幅度调制器（140）产生的调制信号而获得的信号的数字调制信号。 失真计算单元（180）计算数字调制信号的失真。 控制单元（190）基于数字调制信号的失真来控制延迟时间。 延迟调整单元（130）调整延迟时间，直到振幅信号输入到幅度调制器（140）的时间或直到角度调制信号输入到幅度调制器（140）的时间的延迟时间。

公开(公告)号：WO2009106827A2

公开(公告)日：2009-09-03

申请号：PCT/GB2009000533

申请日：2009-02-26

Applicant: CAMBRIDGE SILICON RADIO LTD ,  BRANDT PER-OLOF

Inventor： BRANDT PER-OLOF

CPC classification number: H04L27/368 ,  H03F1/3247 ,  H03F1/3294 ,  H03F3/24 ,  H03F2200/336 ,  H03F2201/3231 ,  H03F2201/3233 ,  H04L27/362

Abstract: Signal modulation apparatus for applying a modulation signal to a carrier signal, the apparatus comprising: an amplitude modulator for modulating the amplitude of the carrier signal in accordance with a control signal; first mixing means for mixing together fractions of the carrier signal before and after action of the amplitude modulator to produce a first detection signal indicative of the amplitude modulation applied by the amplitude modulator; and detection means for comparing the control signal with a first detection signal to evaluate distortion in the first detection signal as compared with the control signal.

Abstract translation: 用于将调制信号应用于载波信号的信号调制装置，所述装置包括：幅度调制器，用于根据控制信号调制载波信号的振幅; 第一混合装置，用于将幅度调制器的作用之前和之后的载波信号的分数混合，以产生指示由幅度调制器施加的幅度调制的第一检测信号; 以及检测装置，用于将控制信号与第一检测信号进行比较，以评估与控制信号相比第一检测信号中的失真。

公开(公告)号：WO2008155610A2

公开(公告)日：2008-12-24

申请号：PCT/IB2008/000996

申请日：2008-01-28

Applicant: DALI SYSTEMS CO., LTD. ,  YANG, Dali ,  YANG, Jia

Inventor： YANG, Dali ,  YANG, Jia

IPC: H03G1/04

CPC classification number: H03F1/3294 ,  H03F1/3247 ,  H03F3/24 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2200/57 ,  H03F2201/3224 ,  H03F2201/3233

Abstract: An embodiment of the invention is a time-delay invariant predistortion approach to linearize power amplifiers in wireless RF transmitters. The predistortion architecture is based on the stored-compensation or memory-compensation principle by using a combined time-delay addressing method, and therefore, the architecture has an intrinsic, self-calibrating time-delay compensation function. The predistortion architecture only uses a lookup table to conduct both the correction of non-linear responses of a power amplifier and the compensation of any time-delay effects presented in the same system. Due to the time-delay invariant characteristic, the predistortion design has a wider dynamic range processing advantage for wireless RF signals, and therefore can be implemented in multi-carrier and multi-channel wireless systems.

Abstract translation: 本发明的实施例是用于线性化无线RF发射机中的功率放大器的时间延迟不变预失真方法。 预失真架构通过使用组合的时间延迟寻址方法基于存储补偿或存储器补偿原理，因此该架构具有内在的自校准时间延迟补偿功能。 预失真架构仅使用查找表来进行功率放大器的非线性响应的校正以及在同一系统中呈现的任何时间延迟效应的补偿。 由于时延不变特性，预失真设计对于无线RF信号具有更广泛的动态范围处理优势，因此可以在多载波和多信道无线系统中实现。

公开(公告)号：WO2008140730A1

公开(公告)日：2008-11-20

申请号：PCT/US2008/005886

申请日：2008-05-08

Applicant: M/A-COM, INC. ,  LANE, John, R. ,  OVERSTREET, William, P.

Inventor： LANE, John, R. ,  OVERSTREET, William, P.

IPC: H03F3/189 ,  H03F1/32 ,  H03F3/24 ,  H03F1/06 ,  H03C5/00 ,  H04B1/04 ,  H04L27/36 ,  H03C3/40

CPC classification number: H03F1/3282 ,  H03C5/00 ,  H03F1/0205 ,  H03F1/3247 ,  H03F1/3294 ,  H03F3/189 ,  H03F3/24 ,  H03F2200/321 ,  H03F2200/324 ,  H03F2200/333 ,  H03F2200/336 ,  H03F2200/393 ,  H03F2200/451 ,  H03F2200/78 ,  H04B1/0475 ,  H04L27/364 ,  H04L27/368

Abstract: A system (100) for power amplification of an RF signal including polar feedback control. The system may include a feedback-controlled modulator (110) configured to modulate an RF signal based on a feedback-corrected control signal. The modulator (110) is further configured to generate a modulated RF signal. The system also may include a phase shifter configured to correct the phase of the modulated RF signal based on a feedback phase control signal. The system further includes a power amplifier (112) in communication with the modulator, and/or the phase shifter. The amplifier (112) is configured to amplify the modulated RF signal and to generate an amplified RF output signal. The system also includes a feedback network (116) configured to generate polar feedback signals, including the feedback-corrected control signal and/or the feedback phase control signal.

Abstract translation: 一种用于对包括极性反馈控制的RF信号进行功率放大的系统（100）。 该系统可以包括被配置为基于反馈校正的控制信号来调制RF信号的反馈控制调制器（110）。 调制器（110）还被配置为产生调制的RF信号。 该系统还可以包括移相器，其被配置为基于反馈相位控制信号来校正调制的RF信号的相位。 该系统还包括与调制器通信的功率放大器（112）和/或移相器。 放大器（112）被配置为放大经调制的RF信号并产生放大的RF输出信号。 该系统还包括被配置为产生包括反馈校正的控制信号和/或反馈相位控制信号的极性反馈信号的反馈网络（116）。

公开(公告)号：WO2008105775A1

公开(公告)日：2008-09-04

申请号：PCT/US2007/010566

申请日：2007-04-30

Applicant: DALI SYSTEMS CO. LTD ,  YANG, Dali ,  YANG, Jia

Inventor： YANG, Dali ,  YANG, Jia

IPC: H04B7/00

CPC classification number: H03F1/3247 ,  H03F1/3241 ,  H03F1/3294 ,  H03F3/24 ,  H03F2200/57 ,  H03F2201/3233

Abstract: An embodiment of the invention uses a predistortion correction signal to combination the modulated RF signal by an analog multiplier for linearization of power amplifiers having nonlinear characteristics such as those used in wireless RF transmitters. A predistortion controller comprises a plurality of down converters for retrieving both the ideal non-distorted information and the feedback distorted information, together with pre-stored digitally-indexed predistortion information stored, for example, in a look-up table. The digitally- indexed information models nonlinear characteristics of the high power amplifier, and is stored prior to processing of pre-compensation in the power amplifier. When the predistortion information is combined with the modulated RF signal in the analog multiplier, the result is a substantially linear information transmission from the power amplifier.

Abstract translation: 本发明的一个实施例使用预失真校正信号将经调制的RF信号由模拟乘法器组合，用于线性化具有诸如在无线RF发射机中使用的非线性特性的功率放大器。 预失真控制器包括多个下变频器，用于检索理想的非失真信息和反馈失真信息，以及例如存储在查找表中的预存储的数字索引预失真信息。 数字索引信息模拟大功率放大器的非线性特性，并在功率放大器中对预补偿进行处理之前进行存储。 当预失真信息与模拟乘法器中的调制RF信号组合时，结果是来自功率放大器的基本上线性的信息传输。

公开(公告)号：WO2007089994A2

公开(公告)日：2007-08-09

申请号：PCT/US2007/060734

申请日：2007-01-19

Applicant: MOTOROLA, INC. ,  MITZLAFF, James, E. ,  MATHES, Patrick, C. ,  HAGEN, Rodney,

Inventor： MITZLAFF, James, E. ,  MATHES, Patrick, C. ,  HAGEN, Rodney,

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03F1/02 ,  H03F1/0227 ,  H03F1/3294 ,  H03F3/24 ,  H04B2001/045

Abstract: A supply voltage to a power amplifier is controlled. A signal at a single point in a power amplifier is detected (600). A signal parameter is determined (602) for the detected signal. The signal parameter is compared (604) to at least one predetermined limit. This comparison result is used to determine (606) whether to adjust (608) a supply voltage to the power amplifier. The signal parameter is, for example, an average power or a peak-to-average power ratio.

Abstract translation: 控制到功率放大器的电源电压。 检测功率放大器中的单个点处的信号（600）。 确定检测信号的信号参数（602）。 信号参数被比较（604）至少一个预定极限。 该比较结果用于确定（606）是否调整（608）功率放大器的电源电压。 信号参数例如是平均功率或峰均功率比。