-
公开(公告)号：US11973472B2
公开(公告)日：2024-04-30
申请号：US17567641
申请日：2022-01-03
Applicant: NEWRACOM, INC.
Inventor： Seong-Sik Myoung , Ryun Woo Kim
CPC classification number: H03F1/3247 , H03F1/3294 , H03F3/24 , H04B1/0475 , H03F2200/451 , H03F2201/3233 , H04B2001/0425
Abstract: A radio frequency (RF) transmitter includes an analog RF power amplifier and a digital Dynamic Error Vector Magnitude (DEVM) correction module. The DEVM correction module compensates for time-dependent variations in an instantaneous gain of the RF power amplifier. The time-dependent variations may be variations that occur during a period the RF power amplifier is turned on. The RF transmitter may further include one or more analog baseband circuits, and one or more respective baseband digital pre-distortion (DPD) modules that compensate for amplitude modulation to amplitude modulation (AM2AM) nonlinearities in the analog baseband circuits. The digital DEVM correction module and baseband DPD modules may each include respective look-up tables having values determined by respective calibration operations.
-
公开(公告)号：US20180309465A1
公开(公告)日：2018-10-25
申请号：US16024303
申请日：2018-06-29
Applicant: Analog Devices Global
Inventor： Patrick Pratt
CPC classification number: H04B1/0475 , H03F1/3247 , H03F1/3294 , H03F3/195 , H03F2200/451 , H03F2201/3227 , H03F2201/3233 , H04B2001/0425
Abstract: Various examples are directed to systems and methods for digital predistortion (DPD). A linear digital predistortion (DPD) circuit may be programmed to generate a pre-distorted signal linear component based at least in part on a complex baseband signal. A nonlinear DPD circuit may be programmed to generate a pre-distorted signal nonlinear component based at least in part on the complex baseband signal. A mixer circuit programmed to generate a pre-distorted signal based at least in part on the pre-distorted signal linear component and the pre-distorted signal nonlinear component.
-
公开(公告)号：US09903908B2
公开(公告)日：2018-02-27
申请号：US14623239
申请日：2015-02-16
Applicant: Panasonic Corporation
Inventor： Kenji Miyanaga , Noriaki Saito
CPC classification number: G01R31/2837 , G01R31/2841 , H03F1/3247 , H03F1/3294
Abstract: A nonlinear distortion detection device that includes a test signal generator that generates a test signal and outputs the test signal to have the power amplifier amplify the test signal, a Fourier transformer that converts an output signal of the power amplifier to a signal in a frequency domain, and a distortion factor calculator that calculates a distortion factor of the power amplifier based on amplitude information and phase information of the signal in the frequency domain.
-
公开(公告)号：US09838049B2
公开(公告)日：2017-12-05
申请号：US15054533
申请日：2016-02-26
Applicant: Telefonaktiebolaget LM Ericsson (publ)
Inventor： Bradley John Morris , Lars Johan Thorebäck
CPC classification number: H04B1/0475 , H03F1/3247 , H03F1/3294 , H04B2001/0433 , H04L25/08 , H04L27/368 , Y10T29/4913
Abstract: Pre-distorted transmitters operable over a wide range of frequencies including a plurality of predetermined frequency bands are provided. The transmitters include a programmable digital up-converter and a programmable digital down-converter, an ADC, a DAC, a power amplifier and at least one analog filter arranged along a transmit signal path and a feedback signal path.
-
公开(公告)号：US20150163079A1
公开(公告)日：2015-06-11
申请号：US14595619
申请日：2015-01-13
Applicant: Telefonaktiebolaget L M Ericsson (publ)
Inventor： Mark Edward Rollins
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.
Abstract translation: 公开了一种用于多频带发射机中的射频数字预失真的系统和方法。 在一个实施例中，多频带发射机包括数字上变频系统，其被配置为数字上变频数字输入信号以提供数字射频信号。 每个数字输入信号和每个数字射频信号对应于要由多频带发射机发射的多频带发射信号的不同频带。 该多波段发射机还包括一个射频数字预失真系统，配置为数字预失真数字射频信号以提供预失真的数字射频信号，以及组合器，被配置为组合预失真的数字射频信号以提供多波段预失真的数字 射频信号
-
Patent Agency Ranking
公开(公告)号：US08964892B2
公开(公告)日：2015-02-24
申请号：US13215884
申请日：2011-08-23
Applicant: Niels-Henrik Lai Hansen , Mikkel Christian W. Hoyerby
Inventor： Niels-Henrik Lai Hansen , Mikkel Christian W. Hoyerby
CPC classification number: H04B1/0475 , H03F1/3247 , H03F1/3294 , H03F1/34 , H03F3/189 , H03F3/24 , H03F3/245 , H03F2200/336 , H03F2200/408 , H04B2001/0433
Abstract: A linear transmitter includes a closed loop feedback path to maintain linearity of a power amplifier subsystem. The closed loop feedback path provides RF injection of one or more reference RF carrier signals (172, 174) combined with a radio frequency (RF) feedback signal (149) to generate a feedback RF error signal (173). A narrowband receiver (170) continuously monitors stability of the feedback RF error signal (173). A loop phase adjusting circuit (188) generates phase adjustments (189) to compensate for instabilities in the closed loop feedback path thereby maintaining stability of the PA RF output signal (146).
Abstract translation: 线性发射机包括闭环反馈路径以保持功率放大器子系统的线性度。 闭环反馈路径提供与射频（RF）反馈信号（149）组合的一个或多个参考RF载波信号（172,174）的RF注入，以产生反馈RF误差信号（173）。 窄带接收机（170）连续监视反馈RF误差信号（173）的稳定性。 环路相位调整电路（188）产生相位调整（189）以补偿闭环反馈路径中的不稳定性，由此保持PA RF输出信号（146）的稳定性。
-
7.发明授权Method and system for compensating for distortion in a transmitter by utilizing a digital predistortion scheme with a feedback mixer configuration 有权通过利用具有反馈混频器配置的数字预失真方案来补偿发射机中的失真的方法和系统公开(公告)号：US08948700B2
公开(公告)日：2015-02-03
申请号：US13971224
申请日：2013-08-20
Applicant: Broadcom Corporation
Inventor： Arya Behzad , Ali Afsahi , Vikram Magoon , Mark Gonikberg , George Varghese , Guruprasad Revanna
CPC classification number: H03F1/3247 , H03F1/3294 , H03F2200/336 , H03F2200/451 , H04L27/368
Abstract: Aspects of a method and system for compensating for distortion in a transmitter by utilizing a digital predistortion scheme with a feedback mixer configuration are presented. Aspects of the system may include an RF transmitter that enables generation of an RF output signal in response to one or more generated input signals. One or more feedback signals may be generated by performing frequency downconversion on the RF output signal within a corresponding one or more feedback mixer circuits. The generated one or more feedback signals may be inserted at a corresponding one or more insertion points in an RF receiver. Each insertion point may be between a receiver mixer circuit and corresponding circuits that generate a baseband signal based on the corresponding one of the feedback signals.
Abstract translation: 提出了一种通过利用具有反馈混频器配置的数字预失真方案来补偿发射机中的失真的方法和系统的方面。 系统的方面可以包括RF发射器，其能够响应于一个或多个所生成的输入信号而产生RF输出信号。 可以通过对相应的一个或多个反馈混频器电路中的RF输出信号执行频率下变频来产生一个或多个反馈信号。 所生成的一个或多个反馈信号可以插入RF接收器中相应的一个或多个插入点。 每个插入点可以在接收机混合器电路和基于相应的一个反馈信号产生基带信号的相应电路之间。
-
8.发明授权Method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a single feedback mixer 有权通过利用具有单个反馈混频器的数字预失真方案来补偿发射机中的估计失真的方法和系统公开(公告)号：US08942635B2
公开(公告)日：2015-01-27
申请号：US14080898
申请日：2013-11-15
Applicant: Broadcom Corporation
Inventor： Arya Behzad , Ali Afsahi , Vikram Magoon , Alok Gupta
CPC classification number: H03F1/3247 , H03F1/3294 , H03F2200/336 , H03F2200/57 , H04L27/368
Abstract: Aspects of a method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a single feedback mixer are presented. Aspects of the system may include at least one circuit that enables generation of an output signal in response to one or more generated input signals. A feedback signal may be generated within a single feedback mixer circuit that may perform a frequency mix-down operation on the generated output signal. The generated feedback signal may be inserted at one or more insertion points in a receiver. Each of the insertion points may be located between a mixer stage of the receiver, and one or more circuits that generate a baseband signal based on the generated feedback signal.
Abstract translation: 提出了通过利用具有单个反馈混频器的数字预失真方案来补偿发射机中的估计失真的方法和系统的方面。 该系统的方面可以包括响应于一个或多个所生成的输入信号而能够产生输出信号的至少一个电路。 可以在可以对所生成的输出信号执行频率混合运算的单个反馈混频器电路内产生反馈信号。 产生的反馈信号可以插入接收器中的一个或多个插入点。 每个插入点可以位于接收器的混合器级之间，以及基于产生的反馈信号产生基带信号的一个或多个电路。
-
公开(公告)号：US20140348263A1
公开(公告)日：2014-11-27
申请号：US13902023
申请日：2013-05-24
Applicant: Telefonaktiebolaget L M Ericsson (publ)
Inventor： Mark Edward Rollins
IPC: H04L25/08
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.
Abstract translation: 公开了一种用于多频带发射机中的射频数字预失真的系统和方法。 在一个实施例中，多频带发射机包括数字上变频系统，其被配置为数字上变频数字输入信号以提供数字射频信号。 每个数字输入信号和每个数字射频信号对应于要由多频带发射机发射的多频带发射信号的不同频带。 该多波段发射机还包括一个射频数字预失真系统，配置为数字预失真数字射频信号以提供预失真的数字射频信号，以及组合器，被配置为组合预失真的数字射频信号以提供多波段预失真的数字 射频信号
-
公开(公告)号：US08854128B2
公开(公告)日：2014-10-07
申请号：US13516631
申请日：2010-11-10
Applicant: Masahiko Onishi
Inventor： Masahiko Onishi
IPC: H03G3/20
CPC classification number: H03F3/24 , H03F1/02 , H03F1/0222 , H03F1/0244 , H03F1/3241 , H03F1/3294 , H03F3/189 , H03F2200/102 , H03F2200/321 , H03F2200/336 , H04L27/367
Abstract: Signal timing adjustment in an amplifying device is appropriately performed by phase adjustment by a digital filter. The amplifying device includes an amplifier; an amplitude-voltage converting unit 12 that performs a desired process on a signal relating to operation of the amplifier, whereby the signal is band-broadened; and a timing adjusting unit 15a that performs timing adjustment of the signal to be provided to the amplifier, by phase adjustment by a digital filter. The timing adjusting unit 15a performs the timing adjustment of the signal at a stage before the signal is band-broadened by the amplitude-voltage converting unit 12.
Abstract translation: 通过数字滤波器的相位调整来适当地执行放大装置中的信号定时调整。 放大装置包括放大器; 幅度电压转换单元12，对与放大器的操作有关的信号执行期望的处理，由此信号被带宽化; 以及定时调整单元15a，通过数字滤波器的相位调整来执行要提供给放大器的信号的定时调整。 定时调整单元15a在由幅度电压转换单元12将信号带宽化之前的阶段执行信号的定时调整。
-
-
-
-
-
-
-
-
-
Search Results
525
records
(took 0.034 seconds)
