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公开(公告)号：US20240178805A1
公开(公告)日：2024-05-30
申请号：US18519626
申请日：2023-11-27
申请人： MEDIATEK INC.
发明人： Ting-Hsun KUO , Tsung-Pin HU
CPC分类号： H03F3/245 , H03F1/3258 , H04B1/0475 , H04L25/03847 , H03F2200/451 , H04B2001/0408
摘要： An electronic device includes a processor, a modulator, and a power amplifier. The processor receives a baseband signal and executes a first ET shaping function on the baseband signal. The modulator receives the baseband signal, detects the magnitude of the baseband signal, and outputs the first voltage according to the magnitude of the baseband signal. The power amplifier outputs an amplified signal based on the first voltage. The first ET shaping function enables the relationship between the baseband signal and the first voltage to be Vpa=a|X|2+b. X is the baseband signal, Vpa is the first voltage, and a and b are constants. The look-up table records the relation curve between the power of the amplified signal and the first voltage when the second ET shaping function is used for envelope tracking.
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公开(公告)号：US09794090B2
公开(公告)日：2017-10-17
申请号：US15398499
申请日：2017-01-04
发明人： Huan Xie , Xiaomin Zhou
CPC分类号： H04L25/03343 , H04B2001/0425 , H04L25/03847 , H04L25/49
摘要： Present application provides embodiments of a transmitter and an interference cancellation method. The transmitter includes: a first digital predistorter (DPD), a power amplifier (PA), and a first processor located on a feedback channel of the transmitter and separately connected to the PA and the first DPD. The first processor performs, according to a feedback cancellation signal, interference cancellation on a signal of the feedback channel, to acquire a first mixed signal, and sends the first mixed signal to the first DPD. The first DPD is configured to perform linear predistortion processing according to a first baseband signal on a first transmit channel and the first mixed signal, to generate a first predistortion signal. The PA is configured to amplify and then transmit a to-be-transmitted signal using an antenna. The to-be-transmitted signal is the first predistortion signal or a signal obtained according to the first predistortion signal.
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公开(公告)号：US20170257235A1
公开(公告)日：2017-09-07
申请号：US15424892
申请日：2017-02-06
申请人： MEDIATEK INC.
发明人： Tai-You Lu
IPC分类号： H04L25/03 , H04L12/873
CPC分类号： H04L25/03993 , G10K2210/108 , H03H1/02 , H03H11/0461 , H03H11/1213 , H03H11/1269 , H03H21/00 , H04L25/03057 , H04L25/03847 , H04L47/522
摘要： A filtering device includes a low-pass filter (LPF), a noise estimation circuit and a first combining circuit. The LPF receives and filters a pre-filtering signal to generate an output signal of the filtering device. The noise estimation circuit estimates an estimated noise signal according to the output signal and the pre-filtering signal. The first combining circuit subtracts the estimated noise signal from an input signal of the filtering device to generate the pre-filtering signal.
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14.发明申请公开(公告)号：US20170207934A1
公开(公告)日：2017-07-20
申请号：US15000476
申请日：2016-01-19
CPC分类号： H04L25/03834 , H04L25/03006 , H04L25/0314 , H04L25/03165 , H04L25/0384 , H04L25/03847 , H04L27/2017
摘要： New partial response signaling systems and methods for high spectral efficiency communications are described. In a first implementation, a communication system includes a partial response signaling transmitter and a nonlinear satellite transponder. The partial response signaling transmitter includes a partial response transmit filter configured to convert complex-valued data symbols to a transmit signal using a partial response pulse shaping function; and a modulator configured to modulate the transmit signal onto a carrier wave. The transponder receives and non-linearly amplifies the modulated transmit signal for broadcast to receivers. In a second implementation, a receiver includes circuitry for downconverting a received input signal; a partial response filter with a partial response impulse function for filtering the downconverted signal; circuitry for downsampling the partial response filtered signal; circuitry for equalizing the downsampled signal; and a linear and non-linear interference cancellation module including circuitry for removing linear and non-linear ISI in the input signal.
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公开(公告)号：US20170118047A1
公开(公告)日：2017-04-27
申请号：US15398499
申请日：2017-01-04
发明人： Huan XIE , Xiaomin ZHOU
CPC分类号： H04L25/03343 , H04B2001/0425 , H04L25/03847 , H04L25/49
摘要： Present application provides embodiments of a transmitter and an interference cancellation method. The transmitter includes: a first digital predistorter (DPD), a power amplifier (PA), and a first processor located on a feedback channel of the transmitter and separately connected to the PA and the first DPD. The first processor performs, according to a feedback cancellation signal, interference cancellation on a signal of the feedback channel, to acquire a first mixed signal, and sends the first mixed signal to the first DPD. The first DPD is configured to perform linear predistortion processing according to a first baseband signal on a first transmit channel and the first mixed signal, to generate a first predistortion signal. The PA is configured to amplify and then transmit a to-be-transmitted signal using an antenna. The to-be-transmitted signal is the first predistortion signal or a signal obtained according to the first predistortion signal.
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公开(公告)号：US09337879B2
公开(公告)日：2016-05-10
申请号：US13771017
申请日：2013-02-19
申请人： Aviat U.S., Inc.
发明人： Paul A. Kennard
CPC分类号： H04B1/44 , H04B1/38 , H04B3/06 , H04L25/03847 , H04L25/085 , H04L27/2626 , H04W88/085 , Y02D70/00
摘要： Systems and methods for transceiver communication are discussed herein. A filter module may be configured to filter each carrier signal of a multicarrier transmit signal with a different bandpass filter, each bandpass filter configured to filter a different frequency band. A carrier control module may be configured to control the plurality of bandpass filters of the filter module using a carrier selection signal to enable or disable each bandpass filter, thereby coupling carrier signals of the multicarrier transmit signal to a first set of bandpass filters and decoupling a second set of bandpass filters. Filtering the carrier signals of the multicarrier transmit signal is performed by the first set of bandpass filters while the decoupling of the second set of bandpass filters limits energy in the respective frequency band. An antenna may be configured to transmit the filtered multicarrier transmit signal.
摘要翻译： 本文讨论了收发器通信的系统和方法。 滤波器模块可以被配置为利用不同的带通滤波器来滤波多载波发射信号的每个载波信号，每个带通滤波器被配置成滤波不同的频带。 载波控制模块可以被配置为使用载波选择信号来控制滤波器模块的多个带通滤波器，以启用或禁用每个带通滤波器，从而将多载波发射信号的载波信号耦合到第一组带通滤波器， 第二组带通滤波器。 滤波多载波发射信号的载波信号由第一组带通滤波器执行，而第二组带通滤波器的去耦限制了相应频带中的能量。 天线可以被配置为发送经滤波的多载波发射信号。
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公开(公告)号：US20140219665A1
公开(公告)日：2014-08-07
申请号：US13916406
申请日：2013-06-12
申请人： Finisar Corporation
IPC分类号： H04L25/03 , H04B10/564
CPC分类号： H04B10/564 , H04B10/2504 , H04B10/2575 , H04L25/03847
摘要： In one example embodiment, a transmitter module includes a header electrically coupled to a chassis ground. First and second input nodes are configured to receive a differential data signal. A buffer stage has a first node coupled to the first input node and a second node coupled to the second input node. An amplifier stage has a fifth node coupled to a third node of the buffer stage and a sixth node coupled to a signal ground that is not coupled to the chassis ground. An optical transmitter has an eighth node coupled to a seventh node of the amplifier stage and a ninth node configured to be coupled to a voltage source. A bias circuit is configured to couple a fourth node of the buffer stage to a bias current source.
摘要翻译： 在一个示例实施例中，发射机模块包括电耦合到底盘接地的接头。 第一和第二输入节点被配置为接收差分数据信号。 缓冲器级具有耦合到第一输入节点的第一节点和耦合到第二输入节点的第二节点。 放大器级具有耦合到缓冲级的第三节点的第五节点和耦合到未耦合到机架接地的信号地的第六节点。 光发射机具有耦合到放大器级的第七节点的第八节点和被配置为耦合到电压源的第九节点。 偏置电路被配置为将缓冲器级的第四节点耦合到偏置电流源。
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公开(公告)号：US11894954B2
公开(公告)日：2024-02-06
申请号：US17807200
申请日：2022-06-16
申请人： Kioxia Corporation
发明人： Tomohiko Takeuchi
CPC分类号： H04L25/03057 , H04B1/18 , H04L25/03847
摘要： A receiver device according to an embodiment includes a equalizer, a sampler, and a controller. The equalizer receive a first signal. The equalizer boosts the first signal to output a resultant as a second signal. The sampler samples the second signal. The sampler outputs a sampling result of the second signal as a first digital signal. The controller executes adaptive processing for adapting an amount of boost of the first signal. In the adaptive processing, the controller is configured to: adjust an amount of boost for the equalizer based on inter-symbol interference of a part in the first digital signal, the part matching a data pattern of a set pattern filter; and dynamically change a pattern filter to be set according to the amount of boost for the equalizer.
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19.发明申请公开(公告)号：US20180019774A1
公开(公告)日：2018-01-18
申请号：US15546231
申请日：2016-01-30
发明人： Hermann HAMPEL , Ulrich BEROLD , Martin HIRSCHBECK
CPC分类号： H04B1/10 , H04J11/0023 , H04L25/0204 , H04L25/03006 , H04L25/03012 , H04L25/03847 , H04L27/2647 , H04L27/2649 , H04L27/38
摘要： A method for frequency- and time-selective interference suppression for a communication system based on OFDM, and a receiver therefor. To achieve a much lower bit error rate at the output of the receiver or to permit greater interference or a lower signal-to-noise ratio (in a prior art L-DACS1 receiver, at least 45 nautical miles) for the same transmission power, the invention provides: a filter bank pulse blanking method FBPB in which the sampled received signal is applied to a blanking unit for frequency-selective pulse blanking, which blanking unit consists of an analysis filter bank having M sub-bands; a module for frequency-selective pulse blanking of the sub-band signals; and a synthesis filter bank, which reassembles the signal. The analysis filter bank, which breaks down the received signal into multiple sub-bands on a frequency-selective basis, is used before OFDM windowing, such that the sub-band breakdown applies pulse blanking on a sub-band-selective basis.
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公开(公告)号：US20170288916A1
公开(公告)日：2017-10-05
申请号：US15087524
申请日：2016-03-31
申请人： NXP B.V.
发明人： Stefan Mendel , Michael Pieber
IPC分类号： H04L25/03 , H04L25/02 , H04B17/318
CPC分类号： H04L25/03847 , H03G3/3078 , H04B17/318 , H04L25/0262
摘要： Embodiments of a method and a system controlling an amplifier of a communications device are disclosed. In an embodiment, a method for controlling an amplifier of a communications device involves checking for a data reception at the communications device and freezing a gain of the amplifier if the data reception is detected.
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