公开(公告)号：US20080278236A1

公开(公告)日：2008-11-13

申请号：US11794206

申请日：2007-05-04

Applicant: Christopher David Seymour

Inventor： Christopher David Seymour

IPC: H03G3/10

CPC classification number: H03F1/0244 ,  H03F1/0211 ,  H03F1/0222 ,  H03F1/0266 ,  H03F1/32 ,  H03F3/24 ,  H03F2200/105 ,  H03F2200/468 ,  H03F2201/3203

Abstract: A Solid State Power Amplifier (SSPA) for powering a single element of a multi-element antenna, the SSPA comprising:an RF amplifier, having a signal amplifying path that includes preamplifier, driver amplifier and a power output stage;an Electronic Power Conditioner (EPC) for providing a variable value of DC voltage for powering the power output stage of the RF amplifier;a control ASIC for receiving an input power signal of the RF amplifier for providing a voltage control signal to the EPC to determine the value of the DC voltage, the control ASIC addressing an EEPROM holding a collection of control words that define output values of a control output signal for varying values of said input power, such that the value of the DC voltage to the power output stage is varied so as to control the gain compression of the RF amplifier for varying values of input power in order to maintain constant amplifier linearity.

Abstract translation: 一种固态功率放大器（SSPA），用于为多单元天线的单个元件供电，SSPA包括：具有包括前置放大器，驱动放大器和功率输出级的信号放大路径的RF放大器; 电子功率调节器（EPC），用于提供用于为RF放大器的功率输出级供电的DC电压的可变值; 用于接收RF放大器的输入功率信号的控制ASIC，用于向EPC提供电压控制信号以确定DC电压的值，控制ASIC寻址保存定义控制器的输出值的控制字集合的EEPROM 输出信号，用于改变所述输入功率的值，使得到功率输出级的DC电压的值被改变，以便控制用于改变输入功率值的RF放大器的增益压缩，以便保持恒定的放大器线性度。

公开(公告)号：US06535066B1

公开(公告)日：2003-03-18

申请号：US09886597

申请日：2001-06-21

Applicant: David Petsko

Inventor： David Petsko

IPC: H03G310

CPC classification number: H03F1/0261 ,  H03F1/0205 ,  H03F1/32 ,  H03F3/24 ,  H03F2201/3203 ,  H03G3/3042

Abstract: An adaptive bias control scheme for an Orthogonal Frequency Division Multiplex (“OFDM”) transmitter. The transmitter chain is comprised of class A amplifiers. The amplifiers in the transmit chain are backed off from P1dB to ensure linear amplification of the signal. Amplifier back off is defined as (Amplifier P1dB) minus (Average Signal Power). Since the efficiency of the amplifier decreases in direct proportion, to the back off, it is desirable to minimize back off while maintaining linearity. The back off is dependent on the peak to average power ratio (“PAPR”) of the OFDM waveform. The PAPR is measured on a symbol by symbol basis and the amplifier P1dB is adjusted in proportion to the PAPR of the symbol, maintaining a P1dB sufficient to provide the required back off dictated by the maximum PAPR of the OFDM waveform, but can be lowered for symbols with PAPR below the maximum. The average operating point of the amplifiers is reduced by the adaptive bias control on a symbol-by-symbol basis.

Abstract translation: 用于正交频分复用（“OFDM”）发射机的自适应偏置控制方案。 发射机链由A类放大器组成。 发射链中的放大器从P1dB退出，以确保信号的线性放大。 放大器退避定义为（放大器P1dB）减（平均信号功率）。 由于放大器的效率以直接比例降低，因此在保持线性的同时，希望最小化退避。 退避取决于OFDM波形的峰值与平均功率比（“PAPR”）。 PAPR是按符号进行测量的，并且放大器P1dB与符号的PAPR成比例地调整，保持足够的P1dB以提供由OFDM波形的最大PAPR所规定的所需的反向，但可以降低 符号PAPR低于最大值。 通过基于逐个符号的自适应偏置控制来减小放大器的平均工作点。

公开(公告)号：US09595925B2

公开(公告)日：2017-03-14

申请号：US14883069

申请日：2015-10-14

Applicant: Panasonic Corporation

Inventor： Kenji Miyanaga ,  Koji Takinami

IPC: H03F1/26 ,  H03F1/32 ,  H03F1/02 ,  H03F3/24

CPC classification number: H03F1/3247 ,  H03F1/0205 ,  H03F3/245 ,  H03F2201/3203 ,  H03F2201/3227

Abstract: A distortion-compensating power amplifier compensates for nonlinear distortion in a power amplifier. The distortion-compensating power amplifier includes: a predistorter that performs pre-distortion processing, the pre-distortion processing applying an inverse characteristic of a distortion characteristic that is generated in the power amplifier to an input signal; a filter that performs band limitation on the pre-distorted input signal by using a frequency characteristic that is asymmetric with respect to a center frequency of the input signal, the filter having a filter coefficient that is a complex number; a down-sampler that down-samples the band-limited input signal; and a digital-to-analog converter that converts the down-sampled input signal from a digital signal to an analog signal.

Abstract translation: 失真补偿功率放大器补偿功率放大器中的非线性失真。 失真补偿功率放大器包括：预失真处理，预失真处理将在功率放大器中产生的失真特性的反特性应用于输入信号; 滤波器，通过使用相对于输入信号的中心频率不对称的频率特性对预失真输入信号进行频带限制，滤波器具有作为复数的滤波器系数; 下采样器，对带限输入信号进行下采样; 以及将下采样的输入信号从数字信号转换为模拟信号的数 - 模转换器。

公开(公告)号：US09577588B1

公开(公告)日：2017-02-21

申请号：US14849527

申请日：2015-09-09

Applicant: Hughes Network Systems, LLC

Inventor： Bassel F. Beidas

IPC: H04K1/02 ,  H04L25/03 ,  H04L25/49 ,  H03F1/32 ,  H03F3/21 ,  H04B1/04

CPC classification number: H03F1/3241 ,  H03F1/3258 ,  H03F3/211 ,  H03F3/24 ,  H03F2201/3203 ,  H03F2201/3231 ,  H03F2201/3233 ,  H04B1/0475 ,  H04B2001/0408 ,  H04L27/368

Abstract: A single or multistage signal predistorter includes an input coupled to receive an information signal comprising input samples and an output coupled to the high power amplifier, the signal predistorter configured to receive an input sample, generate a distortion sample based on an estimate of nonlinearity of the high power amplifier at an operating saturation level, modify the input sample with a correction term to generate a predistortion signal, wherein the correction term is proportional to the distortion sample, and further wherein the predistortion signal comprises the information signal modified to account for nonlinearities in the high power amplifier.

Abstract translation: 单级或多级信号预失真器包括耦合以接收包括输入样本和耦合到高功率放大器的输出的信息信号的输入，该信号预失真器被配置为接收输入样本，基于所估计的非线性估计来产生失真样本 在功率饱和电平下的高功率放大器，用校正项修改输入采样以产生预失真信号，其中所述校正项与所述失真采样成比例，并且其中所述预失真信号包括被修改以消除非线性的信息信号 大功率放大器。

公开(公告)号：US20160119004A1

公开(公告)日：2016-04-28

申请号：US14989934

申请日：2016-01-07

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： Mark Edward Rollins

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03F1/3247 ,  H03F1/3252 ,  H03F1/3294 ,  H03F3/24 ,  H03F2200/111 ,  H03F2201/3203 ,  H04B2001/0425 ,  H04L25/08 ,  H04L27/368

Abstract: Systems and methods for radio frequency digital predistortion in a multi-band transmitter are disclosed. In one embodiment, the multi-band transmitter includes a digital upconversion system configured to digitally upconvert digital input signals to provide digital radio frequency signals. Each digital input signal and thus each digital radio frequency signal corresponds to a different band of a multi-band transmit signal to be transmitted by the multi-band transmitter. The multi-band transmitter also includes a radio frequency digital predistortion system configured to digitally predistort the digital radio frequency signals to provide predistorted digital radio frequency signals, and a combiner configured to combine the predistorted digital radio frequency signals to provide a multi-band predistorted digital radio frequency signal.

公开(公告)号：US20160118946A1

公开(公告)日：2016-04-28

申请号：US14883069

申请日：2015-10-14

Applicant: Panasonic Corporation

Inventor： KENJI MIYANAGA ,  KOJI TAKINAMI

IPC: H03F1/32 ,  H03F3/21 ,  H03F1/02

CPC classification number: H03F1/3247 ,  H03F1/0205 ,  H03F3/245 ,  H03F2201/3203 ,  H03F2201/3227

Abstract: A distortion-compensating power amplifier compensates for nonlinear distortion in a power amplifier. The distortion-compensating power amplifier includes: a predistorter that performs pre-distortion processing, the pre-distortion processing applying an inverse characteristic of a distortion characteristic that is generated in the power amplifier to an input signal; a filter that performs band limitation on the pre-distorted input signal by using a frequency characteristic that is asymmetric with respect to a center frequency of the input signal, the filter having a filter coefficient that is a complex number; a down-sampler that down-samples the band-limited input signal; and a digital-to-analog converter that converts the down-sampled input signal from a digital signal to an analog signal.

Abstract translation: 失真补偿功率放大器补偿功率放大器中的非线性失真。 失真补偿功率放大器包括：预失真处理，预失真处理将在功率放大器中产生的失真特性的反特性应用于输入信号; 滤波器，通过使用相对于输入信号的中心频率不对称的频率特性对预失真输入信号进行频带限制，滤波器具有作为复数的滤波器系数; 下采样器，对带限输入信号进行下采样; 以及将下采样的输入信号从数字信号转换为模拟信号的数 - 模转换器。

公开(公告)号：US08611460B2

公开(公告)日：2013-12-17

申请号：US13062958

申请日：2008-09-03

Applicant: Michael O'Brien ,  Patrick Pratt ,  Bing Xu

Inventor： Michael O'Brien ,  Patrick Pratt ,  Bing Xu

IPC: H04K1/02

CPC classification number: H03F1/3247 ,  H03F3/24 ,  H03F2200/451 ,  H03F2201/3203 ,  H03F2201/3233 ,  H04L27/368

Abstract: A wireless communication unit comprises a transmitter having a forward path comprising a power amplifier, PA, and a feedback path operably coupled to the power amplifier, wherein the feedback path comprises a coupler arranged to feed back a portion of a signal to be transmitted and a controller logic module arranged to control a power control value of the power amplifier, such that the forward path and feedback path form a closed loop power control. The controller logic module is arranged to determine a gain variation in the transmitter and provide attenuation to a transmit signal passing therethrough on a transmit slot by transmit slot basis and instruct a power backoff where necessary.

Abstract translation: 无线通信单元包括具有正向路径的发射机，该前向路径包括功率放大器PA和可操作地耦合到功率放大器的反馈路径，其中反馈路径包括耦合器，其被布置为反馈待传输的信号的一部分， 控制器逻辑模块被布置成控制功率放大器的功率控制值，使得前向路径和反馈路径形成闭环功率控制。 控制器逻辑模块被布置为确定发射机中的增益变化，并且通过发送时隙为发送时隙上的通过其的发送信号提供衰减，并且在必要时指示功率回退。

公开(公告)号：US08041315B2

公开(公告)日：2011-10-18

申请号：US10547240

申请日：2004-02-25

Applicant: Miikka Hämäläinen ,  Esko Järvinen

Inventor： Miikka Hämäläinen ,  Esko Järvinen

IPC: H01Q11/12 ,  H04B1/04

CPC classification number: H03F1/0261 ,  H03F1/0205 ,  H03F1/0227 ,  H03F1/32 ,  H03F3/24 ,  H03F2201/3203 ,  H03G3/004

Abstract: A method and a device for tuning power amplifier (PA, 203) properties such as back-off. A peak-to-average value (PAR) of the amplifier input signal is first obtained by control means (206) and then used for adjusting the power amplifier (203) with tuning means (204, 208, 210) functionally connected to the amplifier (203). The suggested solution is advantageously exploited in a wireless communications device like a mobile terminal to optimize the performance thereof by, for example, reducing the power dissipation in the transmitter.

Abstract translation: 一种用于调谐功率放大器（PA，203）属性（如退避）的方法和装置。 放大器输入信号的峰值平均值（PAR）首先由控制装置（206）获得，然后用于通过功能上连接到放大器的调谐装置（204,208,210）来调节功率放大器（203） （203）。 所提出的解决方案有利地被利用在诸如移动终端的无线通信设备中，以通过例如降低发射机中的功率消耗来优化其性能。

公开(公告)号：US07085330B1

公开(公告)日：2006-08-01

申请号：US10153554

申请日：2002-05-22

Applicant: Kedar Shirali

Inventor： Kedar Shirali

IPC: H04L25/03

CPC classification number: H04L27/368 ,  H03F1/3247 ,  H03F1/3282 ,  H03F3/24 ,  H03F2200/207 ,  H03F2201/3203

Abstract: A signal processing method and apparatus capable of correcting signal distortion introduced by an RF power amplifier is disclosed, which includes the use of a buffer to store a plurality of samples representing at least a portion of an input signal intended for amplification by the RF power amplifier, the use of a self-receiver to receive an output signal generated by the RF power amplifier, the use of a synchronization unit to determine, as a matching input sample, which of the stored plurality of samples corresponds most closely to the output signal, and the use of a predistortion unit to selectively apply a distortion correction function to the input signal prior to amplification by the RF power amplifier in which the distortion correction function being derived from a relationship between the matching input sample and the output signal. This permits more precise and updateable determination of the delays involved in the RF modulation and amplification stages of the amplifier and the self-receiver, thus allowing for more precise and aggressive adaptive predistortion to be used. A phase offset correction is optionally provided to correct a phase offset in the realized sample of the output signal relative to the matching input symbol. Additionally, a sampling phase error correction unit may be provided to generate sampling alteration information to an analog-to-digital converter to cause such analog-to-digital converter to selectively alter sampling of the output signal.

Abstract translation: 公开了一种能够校正由RF功率放大器引入的信号失真的信号处理方法和装置，其包括使用缓冲器来存储表示用于由RF功率放大器放大的输入信号的至少一部分的多个采样 使用自接收器接收由RF功率放大器产生的输出信号，使用同步单元确定所存储的多个样本中的哪一个最接近于输出信号的匹配输入样本， 以及使用预失真单元，在RF功率放大器进行放大之前，对输入信号选择性地应用失真校正功能，其中所述失真校正功能根据所述匹配输入采样与所述输出信号之间的关系导出。 这允许对放大器和自身接收机的RF调制和放大级中涉及的延迟的更精确和可更新的确定，从而允许使用更精确和积极的自适应预失真。 可选地提供相位偏移校正以校正输出信号相对于匹配输入符号的已实现采样中的相位偏移。 另外，可以提供采样相位误差校正单元以向模数转换器产生采样改变信息，以使得这种模数转换器有选择地改变输出信号的采样。

公开(公告)号：US20030210096A1

公开(公告)日：2003-11-13

申请号：US10430568

申请日：2003-05-05

Applicant: Cree Microwave, Inc.

Inventor： Raymond Sydney Pengelly ,  Simon Maurice Wood

IPC: H03F003/68

CPC classification number: H03F1/0288 ,  H03F1/0277 ,  H03F1/32 ,  H03F3/602 ,  H03F2201/3203

Abstract: An RF power amplifier circuit for amplifying an RF signal over a broad range of power with improved efficiency includes a carrier amplifier for amplifying an RF signal over a first range of power and with a power saturation level below the maximum of the broad range of power is disclosed. A plurality of peak amplifiers are connected in parallel with the carrier amplifier with each of the peak amplifiers being biased to sequentially provide an amplified output signal after the carrier amplifier approaches saturation. The input signal is applied through a signal splitter to the carrier amplifier and the plurality of peak amplifiers, and an output for receiving amplified output signals from the carrier amplifier and the plurality of peak amplifiers includes a resistive load R/2. The split input signal is applied through a 90null transformer to the carrier amplifier, and the outputs of the peak amplifiers are applied through 90null transformers to a output load. When operating below saturation, the carrier amplifier delivers power to a load of 2R and the carrier amplifier delivers current to the load, which is one-half the current at maximum power when the amplifier is saturated. In one embodiment with the output having an impedance, Z, the carrier amplifier and each peak amplifier is connected to the output through an output-matching network presenting an output impedance of less than Z to each amplifier and with each output-matching network having selected phase length to reduce reactance of the output impedance.

Abstract translation: 一种RF功率放大器电路，用于在提高效率的宽范围的功率范围内放大RF信号，包括载波放大器，用于在第一功率范围内放大RF信号，并且功率饱和电平低于功率范围宽度的最大值 披露 多个峰值放大器与载波放大器并联连接，每个峰值放大器被偏置以在载波放大器接近饱和之后依次提供放大的输出信号。 输入信号通过信号分离器施加到载波放大器和多个峰值放大器，并且用于从载波放大器和多个峰值放大器接收放大的输出信号的输出包括电阻负载R / 2。 分路输入信号通过90°变压器施加到载波放大器，峰值放大器的输出通过90°变压器施加到输出负载。 当工作在饱和度以下时，载波放大器将功率输送到2R的负载，并且载波放大器将电流传递到负载，当放大器饱和时，其为最大功率时的电流的一半。 在一个实施例中，输出具有阻抗Z，载波放大器和每个峰值放大器通过输出匹配网络连接到输出，输出匹配网络向每个放大器呈现小于Z的输出阻抗，并且每个输出匹配网络已经选择 相位长度，以减少输出阻抗的电抗。