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    Radio frequency transmitter
    2.
    发明授权
    Radio frequency transmitter 有权

    公开(公告)号：US10063308B2

    公开(公告)日：2018-08-28

    申请号：US15804240

    申请日：2017-11-06

    申请人： CommScope Technologies LLC

    发明人： Keld Knut Lange

    IPC分类号： H04B1/04 ,  H04B7/14 ,  H03F3/24 ,  H04B7/155 ,  H04W72/04 ,  H04B1/525

    CPC分类号： H04B7/14 ,  H03F1/3223 ,  H03F3/24 ,  H03F2200/111 ,  H03F2200/408 ,  H04B1/04 ,  H04B1/525 ,  H04B7/155 ,  H04B2001/0408 ,  H04W72/0453

    摘要： A radio frequency transmitter device, constituted for transmitting a radio frequency signal in a frequency band comprising at least one transmit subband and at least one receive subband, comprises: a transmit chain for processing a transmit signal associated with the at least one transmit subband; a power amplifier for amplifying the transmit signal; an output port for transmitting the amplified transmit signal; a processing unit for calculating, from the transmit signal associated with the at least one transmit subband, a correction signal in the at least one receive subband making use of a power amplifier model modelling the behavior of the power amplifier; and a coupler for adding the correction signal to the amplified transmit signal for cancelling intermodulation products in the amplified transmit signal produced by the power amplifier.

    WIDEBAND HIGHLY LINEAR AMPLIFIER
    5.
    发明申请
    WIDEBAND HIGHLY LINEAR AMPLIFIER 有权
    宽带高线性放大器

    公开(公告)号：US20160254787A1

    公开(公告)日：2016-09-01

    申请号：US14411479

    申请日：2013-12-23

    申请人： SOLID, INC.

    发明人： Hwan Sun LEE

    IPC分类号： H03F1/32 ,  H03F3/24

    CPC分类号： H03F1/3247 ,  H03F1/26 ,  H03F1/30 ,  H03F1/3223 ,  H03F3/19 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/111 ,  H03F2200/451

    摘要： A wideband highly linear amplifier includes a plurality of pre-distortion units for respectively linearizing digital signals of a plurality of bands, a synthesis unit for synthesizing output signals of the pre-distortion units, a single amplifier for amplifying signals outputted from the synthesis unit, distribution units for respectively separating the signals for each of the plurality of bands from the output signals of the amplifier, a plurality of inverse compensation attenuators for respectively attenuating the separated signals for each of the plurality of bands, and a feedback path for respectively feeding the attenuated signals for each of the plurality of bands back into the pre-distortion unit of the corresponding band out of the plurality of the pre-distortion units.

    摘要翻译： 宽带高线性放大器包括用于分别线性化多个频带的数字信号的多个预失真单元，用于合成预失真单元的输出信号的合成单元，用于放大从合成单元输出的信号的单个放大器， 分配单元，用于分别从放大器的输出信号中分离出多个频带中的每一个的信号;多个逆补偿衰减器，用于分别衰减多个频带中的每一个的分离信号;以及反馈路径，用于分别馈送 将多个频带中的每一个的衰减信号返回到多个预失真单元中的相应频带的预失真单元。

    Envelope path pre-distortion for wideband transmitter systems
    6.
    发明授权
    Envelope path pre-distortion for wideband transmitter systems 有权
    宽带发射机系统的信封路径预失真

    公开(公告)号：US09362866B2

    公开(公告)日：2016-06-07

    申请号：US14100931

    申请日：2013-12-09

    申请人： Broadcom Corporation

    发明人： Debopriyo Chowdhury ,  Ali Afsahi

    IPC分类号： H04K1/02 ,  H04L25/03 ,  H04L25/49 ,  H03F1/02 ,  H03F1/22 ,  H03F1/32 ,  H03F3/195 ,  H03F3/24 ,  H03F3/45

    CPC分类号： H03F1/0227 ,  H03F1/223 ,  H03F1/3223 ,  H03F3/195 ,  H03F3/24 ,  H03F3/45179 ,  H03F2200/336 ,  H03F2203/45394

    摘要： A communication device, such as a smart phone, includes an envelope tracking power supply modulator. The envelope tracking power supply modulator receives an envelope tracking reference signal. A baseband controller pre-distorts the envelope tracking reference signal responsive to distortion caused by the envelope tracking power supply modulator. For instance, the pre-distortion may modify the nominal envelope tracking reference signal so that, after the modulator acts on the modified reference signal, the output of the modulator has increased linearity.

    摘要翻译： 诸如智能电话的通信设备包括信封跟踪电源调制器。 信封跟踪电源调制器接收包络跟踪参考信号。 基带控制器响应于由包络跟踪电源调制器引起的失真来预失真包络跟踪参考信号。 例如，预失真可以修改标称包络跟踪参考信号，使得在调制器作用于修改的参考信号之后，调制器的输出具有增加的线性度。

    RF TRANSMITTER SUPPORTING CARRIER AGGREGATION AND ENVELOPE TRACKING
    7.
    发明申请
    RF TRANSMITTER SUPPORTING CARRIER AGGREGATION AND ENVELOPE TRACKING 审中-公开
    射频发射机支持载波聚合和信道跟踪

    公开(公告)号：US20160065254A1

    公开(公告)日：2016-03-03

    申请号：US14835111

    申请日：2015-08-25

    申请人： Electronics and Telecommunications Research Institute

    发明人： Mi-Jeong PARK ,  Mun-Yang PARK ,  Dong-Woo KANG ,  Jang-Hong CHOI

    IPC分类号： H04B1/04 ,  H04B17/13

    CPC分类号： H04B1/0475 ,  H03F1/3223 ,  H03F3/24 ,  H04B1/0028 ,  H04B2001/0416 ,  H04B2001/0441 ,  H04W52/346 ,  H04W52/52

    摘要： Exemplary embodiments of the present invention relate to an RF transmitter supporting carrier aggregation and envelope tracking and an RF transmitter according to an embodiment of the present invention comprises an RF path configured to convert a carrier aggregation signal in which a plurality of component carriers belonging to a baseband are aggregated into an RF signal; an ET path configured to generate an envelope signal by calculating magnitudes of the plurality of component carriers, respectively, and adding the calculated each magnitude of the component carriers; and an amplifier configured to power-amplify the converted RF signal according to a bias voltage corresponding to the generated envelope signal. According to exemplary embodiments of the present invention, power amplification efficiency and data transmission efficiency are improved by applying carrier aggregation and envelope tracking.

    摘要翻译： 本发明的示例性实施例涉及一种支持载波聚合和包络跟踪的RF发射机，以及根据本发明实施例的RF发射机，包括：RF路径，被配置为转换载波聚合信号，其中属于 基带被聚合成RF信号; ET路径，其被配置为通过分别计算所述多个分量载波的幅度并且分别计算所述分量载波的每个幅度来生成包络信号; 以及放大器，被配置为根据与所生成的包络信号相对应的偏置电压对转换的RF信号进行功率放大。 根据本发明的示例性实施例，通过应用载波聚合和包络跟踪来提高功率放大效率和数据传输效率。

    SWITCHABLE MULTI-OUTPUT LOW-NOISE AMPLIFIER WITH DISTORTION CANCELLATION
    10.
    发明申请
    SWITCHABLE MULTI-OUTPUT LOW-NOISE AMPLIFIER WITH DISTORTION CANCELLATION 有权
    具有失真消除功能的可切换多输出低噪声放大器

    公开(公告)号：US20150171798A1

    公开(公告)日：2015-06-18

    申请号：US14107135

    申请日：2013-12-16

    申请人： MOTOROLA SOLUTIONS, INC

    发明人： SHAFIULLAH SYED ,  JIUN HOW NG

    IPC分类号： H03F1/32 ,  H03F3/193 ,  H03F3/68 ,  H03F1/26

    CPC分类号： H03F1/3223 ,  H03F1/0277 ,  H03F1/223 ,  H03F1/26 ,  H03F3/193 ,  H03F3/68 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/451 ,  H03F2201/3206 ,  H03F2201/3221

    摘要： A low-noise amplifier is provided that includes an input amplifier stage coupled to a plurality of independently switchable output amplifier stages. The input amplifier stage is operative to amplify an input communications signal, and it provides both an amplified communications signal and a feedforward signal. The amplified communications signal and the feedforward signal both include a distortion component. Each of the switchable output stages is operative to provide an output that combines the feedforward signal with the amplified communications signal in such as way that the distortion components of the signals at least partially cancel one another. In some embodiments, the switching of the output amplifier stages is performed by circuitry that also serves to improve reverse isolation of the separate output amplifier stages.

    摘要翻译： 提供了一种低噪声放大器，其包括耦合到多个可独立切换的输出放大器级的输入放大器级。 输入放大器级用于放大输入通信信号，并且其提供放大的通信信号和前馈信号。 放大的通信信号和前馈信号都包括失真分量。 每个可切换输出级可操作以提供将前馈信号与放大的通信信号组合的输出，使得信号的失真分量至少部分地相互抵消。 在一些实施例中，输出放大器级的切换由也用于改善分离的输出放大器级的反向隔离的电路来执行。