专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

101. 发明授权

US09191250B2 Extended bandwidth adaptive digital pre-distortion with reconfigurable analog front-ends 有权
标题翻译：具有可重构模拟前端的扩展带宽自适应数字预失真
公开(公告)号：US09191250B2
公开(公告)日：2015-11-17
申请号：US14090092
申请日：2013-11-26
申请人： BlackBerry Limited
发明人： Mohammad Omer , Stephen Arnold Devison , Hamed Holisaz , Oleksiy Kravets
IPC分类号： H04L25/08 , H04L27/36 , H04B17/13 , H03F1/32 , H03F3/19 , H03F3/24 , H04L25/03 , H04B1/04
CPC分类号： H04L25/08 , H03F1/3241 , H03F1/3258 , H03F3/19 , H03F3/245 , H03F2200/165 , H03F2200/451 , H03F2201/3215 , H04B17/13 , H04B2001/0425 , H04L25/03159 , H04L25/03343 , H04L27/368
摘要： A pre-distortion method. A signal to be transmitted Tx is pre-distorted to compensate for nonlinearities of a transmitter. The pre-distorted signal is filtered by an EBEE filter and a baseband filter. The EBEE filter has a filter characteristic of that cancels the baseband filter response over the range of frequencies from a first corner frequency of the baseband filter to a frequency of N*fB where N is a highest order of distortion component being cancelled and fB is the bandwidth of the original signal to be transmitted. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
摘要翻译：一种预失真方法。要发送的信号Tx被预失真以补偿发射机的非线性。预失真信号由EBEE滤波器和基带滤波器滤波。 EBEE滤波器具有这样的滤波器特性，其消除了从基带滤波器的第一转角频率到N * fB频率的频率范围内的基带滤波器响应，其中N是失真分量的最高阶消除，fB是要发送的原始信号的带宽。该摘要不被认为是限制性的，因为其他实施例可能偏离本摘要中描述的特征。

102. 发明申请

US20150318880A1 Digital Pre-Distortion for High Bandwidth Signals 有权
标题翻译：数字预失真高带宽信号
公开(公告)号：US20150318880A1
公开(公告)日：2015-11-05
申请号：US14651920
申请日：2012-12-13
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： Leonard Rexberg , Håkan Malmqvist
IPC分类号： H04B1/04
CPC分类号： H04B1/0475 , H03F1/02 , H03F1/3247 , H03F3/24 , H03F2201/3233 , H04B2001/0425 , H04B2001/045 , H04L27/368
摘要： A digital pre-distortion arrangement is disclosed. The arrangement comprises a respective filter bank for each of two or more initial signals to be amplified simultaneously by a non-linear power amplifier, N combiners, N pre-distorters and a multiplexer. Each respective filter bank comprises N interrelated filters. Multiplexed impulse responses of the interrelated filters define an overall filter function comprising a pass band associated with a transmission frequency of the initial signal. Each respective filter bank is configured to filter the respective initial signal in each of the interrelated filters to produce N digital filtered signals. The initial signal and each of the digital filtered signals have sample rate R. Each of the combiners is configured to combine corresponding digital filtered signals of each of the two or more initial signals to produce a composite digital signal having sample rate R. Each of the pre-distorters is configured to apply digital pre-distortion at a processing rate R to a respective one of the composite digital signals to produce a pre-distorted composite digital signal having sample rate R. The multiplexer is configured to multiplex the N pre-distorted composite digital signals to produce a pre-distorted digital signal having a sample rate N times R, wherein the pre-distorted digital signal comprises a signal component of each of the two or more initial signals and N times R is greater or equal to a total bandwidth comprising the transmission frequencies of the two or more initial signals. Corresponding method, transmitter and wireless communication device are also disclosed.
摘要翻译：公开了数字预失真布置。该装置包括用于由非线性功率放大器，N个组合器，N个预变换器和多路复用器同时放大的两个或更多个初始信号中的每一个的相应滤波器组。每个相应的滤波器组包括N个相关滤波器。相关滤波器的多路复用脉冲响应定义了包括与初始信号的传输频率相关联的通带的整体滤波器功能。每个相应的滤波器组被配置为对每个相关滤波器中的相应初始信号进行滤波，以产生N个数字滤波信号。初始信号和每个数字滤波信号具有采样率R.每个组合器被配置为组合两个或更多个初始信号中的每一个的对应的数字滤波信号，以产生具有采样率R的复合数字信号。预变换器被配置为以处理速率R将数字预失真应用于复合数字信号的相应一个，以产生具有采样率R的预失真复合数字信号。多路复用器被配置为将N个预失真的复合数字信号以产生具有采样率N次R的预失真数字信号，其中预失真数字信号包括两个或多个初始信号中的每一个的信号分量，并且N次R大于或等于总带宽包括两个或多个初始信号的传输频率。还公开了相应的方法，发射机和无线通信设备。

103. 发明授权

US09160378B2 Control method and equipment for radio-frequency signal 有权
标题翻译：射频信号的控制方法和设备
公开(公告)号：US09160378B2
公开(公告)日：2015-10-13
申请号：US14240564
申请日：2013-04-12
申请人： Comba Telecom Systems (China) Ltd
发明人： Zhansheng Zhang , Shuanlong Pan
IPC分类号： H04B1/04 , H03G3/30
CPC分类号： H04B1/0475 , H03F1/3241 , H03G3/3042 , H03G3/3047 , H04B2001/0416 , H04B2001/0425
摘要： The present invention describes a RF signal control method and device that changes the gain attenuation in real time and uses the changed gain attenuation to adjust the RF input signal. The RF signal control method and device also uses determined linear filter parameters for linearity improvement on the digital signal that results from a down-conversion and analog-to-digital converter on the RF input signal. The adjusted and improved signal is output after a digital pre-distortion and power amplification operation. In comparison with existing technologies, the adjusted gain attenuation is used to make adjustment on the RF input signal and improve linearity the RF input signal such that the resulting RF signal has better quality. Thus, the current application improves the linearity effect of a digital pre-distorter and the dynamic effect of a power amplifier for the RF signal, thereby enhancing coverage of the RF output signal.
摘要翻译：本发明描述了实时改变增益衰减的RF信号控制方法和装置，并且使用改变的增益衰减来调整RF输入信号。 RF信号控制方法和装置还使用确定的线性滤波器参数来对由RF输入信号上的下变频和模数转换器产生的数字信号进行线性改善。在数字预失真和功率放大操作之后，调整和改善的信号被输出。与现有技术相比，调整后的增益衰减用于对RF输入信号进行调整，并提高RF输入信号的线性度，使得所得到的RF信号具有更好的质量。因此，当前的应用改进了数字预失真器的线性效应和功率放大器对RF信号的动态效应，从而增强了RF输出信号的覆盖。

104. 发明申请

US20150256216A1 METHOD AND APPARATUS FOR DIGITAL PREDISTORTION FOR A SWITCHED MODE POWER AMPLIFIER 有权
标题翻译：用于开关模式功率放大器的数字预测的方法和装置
公开(公告)号：US20150256216A1
公开(公告)日：2015-09-10
申请号：US14203236
申请日：2014-03-10
申请人： Texas Instruments Incorporated
发明人： Lei Ding , Rahmi Hezar
IPC分类号： H04B1/62 , H04L25/49
CPC分类号： H04B1/62 , H03F1/3241 , H03F1/3247 , H03F3/217 , H04B1/0475 , H04B2001/0425 , H04L25/03012 , H04L25/03343 , H04L25/49
摘要： A method includes receiving an input signal and predistorting a baseband representation of the input signal at a carrier frequency and at one or more harmonic frequencies. The method also includes generating an output signal based on the predistorted baseband representation of the input signal, and transmitting the output signal to a power amplifier. Predistorting the baseband representation of the input signal at the carrier frequency could occur in parallel with predistorting the baseband representation of the input signal at the one or more harmonic frequencies.
摘要翻译：一种方法包括：以载波频率和一个或多个谐波频率接收输入信号和预失真输入信号的基带表示。该方法还包括基于输入信号的预失真基带表示产生输出信号，并将输出信号发送到功率放大器。以载波频率预测输入信号的基带表示可以与在一个或多个谐波频率处对输入信号的基带表示进行预失真并行发生。

105. 发明申请

US20150244329A1 Technique for Extremely High Order IM Correction 审中-公开
标题翻译：高阶IM校正技术
公开(公告)号：US20150244329A1
公开(公告)日：2015-08-27
申请号：US14436275
申请日：2012-10-16
申请人： NOKIA SIEMENS NETWORKS OY , NOKIA SIEMENS NETWORKS US LLC
发明人： Shavantha Kularatna , Bjoern Jelonnek , Kevin Bastin , Chia Sam Wey
IPC分类号： H03F1/32 , H03F3/21 , H03F3/19 , H04B1/04
CPC分类号： H03F1/3241 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/24 , H03F2200/451 , H03F2201/3215 , H04B1/0475 , H04B2001/0425
摘要： A method for correcting high order IM products is described. The method includes creating a modified input signal by increasing one or more portions of an input signal (such as the whole time domain signal for example). The input signal consists of a desired signal and other non-linear products. Each of the one or more portions includes high order IM products. A pre-distorted signal is created by pre-distorting the modified input signal in accordance with a finite signal plan. An output signal is generated by amplifying the pre-distorted signal. Apparatus and computer-readable media are also described.
摘要翻译：描述了用于校正高阶IM产品的方法。该方法包括通过增加输入信号（例如，整个时域信号）的一个或多个部分来创建经修改的输入信号。输入信号由所需信号和其他非线性产品组成。一个或多个部分中的每一个包括高阶IM产品。通过根据有限信号计划对修改的输入信号进行预失真来产生预失真信号。通过放大预失真信号来产生输出信号。还描述了装置和计算机可读介质。

106. 发明申请

US20150236730A1 subtracting linear impairments for non-linear impairment digital pre-distortion error signal 有权
标题翻译：减去非线性损伤数字预失真误差信号的线性损伤
公开(公告)号：US20150236730A1
公开(公告)日：2015-08-20
申请号：US14185888
申请日：2014-02-20
申请人： Texas Instruments Incorporated
发明人： Hongzhi Zhao , Xiaohan Chen , Zigang Yang
IPC分类号： H04B1/04
CPC分类号： H04B1/0475 , H03F1/3241 , H04B2001/0425
摘要： Example embodiment of the systems and methods of linear impairment modeling to improve digital pre-distortion adaptation performance includes a DPD module that is modified during each sample by a DPD adaptation engine. A linear impairment modeling module separates the linear and non-linear errors introduced in the power amplifier. The linear impairment model is adjusted during each sample using inputs from the input signal and from a FB post processing module. The linear impairment modeling module removes the linear errors such that the DPD adaptation engine only adapts the DPD module based on the non-linear errors. This increases system stability and allows for the correction of IQ imbalance inside the linear impairment modeling, simplifying the feedback post-processing.
摘要翻译：用于改善数字预失真适应性能的线性损伤建模的系统和方法的示例性实施例包括在DPD适配引擎的每个采样期间修改的DPD模块。线性损伤建模模块分离功率放大器中引入的线性和非线性误差。在每个采样中使用输入信号和FB后处理模块的输入调整线性损伤模型。线性损伤建模模块消除线性误差，使得DPD自适应引擎仅基于非线性误差来适应DPD模块。这增加了系统稳定性，并允许在线性损伤建模中对IQ不平衡进行校正，从而简化了反馈后处理。

107. 发明申请

US20150236656A1 DISTORTION COMPENSATION APPARATUS, WIRELESS TRANSMISSION APPARATUS, AND DISTORTION COMPENSATION METHOD 有权
标题翻译：失真补偿装置，无线传输装置和失真补偿方法
公开(公告)号：US20150236656A1
公开(公告)日：2015-08-20
申请号：US14595283
申请日：2015-01-13
申请人： FUJITSU LIMITED
发明人： Yuichi Utsunomiya , HIROYOSHI ISHIKAWA , Kazuo Nagatani
IPC分类号： H03F1/32 , H04B1/04
CPC分类号： H03F1/3247 , H03F1/3241 , H03F1/3294 , H03F1/34 , H03F3/24 , H03F2200/129 , H03F2200/336 , H03F2201/3215 , H04B1/04 , H04B1/0475 , H04B2001/0425 , H04B2001/0433
摘要： A distortion compensation apparatus that compensates nonlinear distortion of an amplifier that amplifies power of a multi-carrier signal includes a band limiting unit that places a first frequency band limitation on a first signal fed back from the amplifier to output a second signal after the first frequency band limitation, a decision unit that decides a first cutoff frequency of the first frequency band limitation based on a carrier interval of the multi-carrier signal, and an updating unit that updates a distortion compensation coefficient to be used for compensation of the nonlinear distortion, based on an error between the second signal and the multi-carrier signal.
摘要翻译：用于补偿放大多载波信号功率的放大器的非线性失真的失真补偿装置包括频带限制单元，其对从放大器反馈的第一信号施加第一频带限制，以在第一频率之后输出第二信号频带限制，决定单元，其基于多载波信号的载波间隔来决定第一频带限制的第一截止频率;以及更新单元，更新用于补偿非线性失真的失真补偿系数，基于第二信号和多载波信号之间的误差。

108. 发明申请

US20150236655A1 DISTORTION COMPENSATION CIRCUIT AND TRANSMISSION DEVICE USING DISTORTION COMPENSATION CIRCUIT AND HIGH-FREQUENCY POWER AMPLIFIER 有权
标题翻译：使用失真补偿电路和高频功率放大器的失真补偿电路和变速器
公开(公告)号：US20150236655A1
公开(公告)日：2015-08-20
申请号：US14428518
申请日：2013-06-04
申请人： HITACHI KOKUSAI ELECTRIC INC.
发明人： Nobuo Hirose , Kazuhiko Nakamura
IPC分类号： H03F1/32 , H03F3/19 , H03F3/21
CPC分类号： H03F1/0211 , H03F1/0227 , H03F1/32 , H03F1/3241 , H03F3/24 , H04B1/0475 , H04B2001/0425 , H04L27/2614 , H04L27/367
摘要： The purpose of the invention is to reduce Cartesian loop transmission delay for compensating the distortion occurring in a high-frequency power amplifier and make the distortion compensation converge quickly, thereby increasing the efficiency. A transmission device has: a high-frequency power amplifier; a pre-distortion compensation circuit for independently generating the coefficients of the distortion compensation signal for each order of the odd and even symmetric distortions of the high-frequency power amplifier; a means for varying the power supply voltage of the high-frequency power amplifier with an orthogonal modulation OFDM input signal; a digital frequency converter; a high-frequency band ADC; and a high-frequency band DAC. In the transmission device, an error distortion compensation signal is created from the output of the high-frequency power amplifier and the orthogonal modulation OFDM input signal, and a delay device is inserted at the previous stage of a distortion compensation circuit, said delay device having a delay equivalent to a time constant for varying the power supply voltage of the high-frequency power amplifier with the orthogonal modulation OFDM input signal.
摘要翻译：本发明的目的是减少用于补偿在高频功率放大器中发生的失真的笛卡尔回路传输延迟，并使失真补偿快速收敛，从而提高效率。传输装置具有：高频功率放大器; 预失真补偿电路，用于独立地生成高频功率放大器的奇数和偶数对称失真的每个阶数的失真补偿信号的系数; 用正交调制OFDM输入信号改变高频功率放大器的电源电压的装置; 数字变频器; 高频带ADC; 和高频带DAC。在发送装置中，从高频功率放大器的输出和正交调制OFDM输入信号产生误差补偿信号，在失真补偿电路的前一级插入延迟器，所述延迟器具有延迟等于用正交调制OFDM输入信号改变高频功率放大器的电源电压的时间常数。

109. 发明申请

US20150195002A1 Multiple-Path Noise Cancellation 有权
标题翻译：多路径噪声消除
公开(公告)号：US20150195002A1
公开(公告)日：2015-07-09
申请号：US14200720
申请日：2014-03-07
申请人： Broadcom Corporation
发明人： Ali Afsahi
IPC分类号： H04B1/62 , H04B1/04
CPC分类号： H04B1/62 , H03F1/3241 , H04B1/04 , H04B1/0483 , H04B2001/0425
摘要： A communication device, such as a smartphone or tablet, includes a communication interface with noise cancellation logic. The noise cancellation logic includes a lead path and a reference path. A signal source provides a signal to the lead path and the references path. The signal is amplified along the lead path and the reference path. Distortion is imparted onto the signal during amplification on the lead path. A correction signal based on the difference between the amplified signal on the lead path and the amplified signal on the reference path is generated by the noise cancellation logic. The correction signal may reflect to distortion imparted during amplification on the lead path. The correction signal is differentially combined with the amplified signal on the lead path to attempt to remove the distortion and generate an output.
摘要翻译：诸如智能电话或平板电脑的通信设备包括具有噪声消除逻辑的通信接口。噪声消除逻辑包括引导路径和参考路径。信号源向引导路径和参考路径提供信号。信号沿着引导路径和参考路径被放大。在引线路径上的放大期间，在信号上施加失真。通过噪声消除逻辑产生基于引导路径上的放大信号与基准路径上的放大信号之间的差异的校正信号。校正信号可以反映在引线路径上的放大期间施加的失真。校正信号与引导路径上的放大信号差分地组合以试图去除失真并产生输出。

110. 发明申请

US20150180519A1 WIDE BANDWIDTH DIGITAL PREDISTORTION SYSTEM WITH REDUCED SAMPLING RATE 有权
标题翻译：宽带数字数字预测系统，具有降低的采样率
公开(公告)号：US20150180519A1
公开(公告)日：2015-06-25
申请号：US14552231
申请日：2014-11-24
申请人： Dali Systems Co. Ltd.
发明人： Wan-Jong Kim , Shawn Patrick Stapleton
IPC分类号： H04B1/04 , H04B1/00
CPC分类号： H04B1/0475 , H03F1/02 , H03F1/3241 , H03F3/24 , H04B1/0017 , H04B2001/0425 , H04B2001/0433 , H04B2001/045
摘要： A digital predistortion linearization method is provided for increasing the instantaneous or operational bandwidth for RF power amplifiers employed in wideband communication systems. Embodiments of the present invention provide a method of increasing DPD linearization bandwidth using a feedback filter integrated into existing digital platforms for multi-channel wideband wireless transmitters. An embodiment of the present invention utilizes a DPD feedback signal in conjunction with a low power band-pass filter in the DPD feedback path.
摘要翻译：提供数字预失真线性化方法来增加在宽带通信系统中使用的RF功率放大器的瞬时或者操作带宽。本发明的实施例提供了一种使用集成到用于多信道宽带无线发射机的现有数字平台中的反馈滤波器来增加DPD线性化带宽的方法。本发明的一个实施例利用DPD反馈信号与DPD反馈路径中的低功率带通滤波器相结合。

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