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公开(公告)号：US09967826B2
公开(公告)日：2018-05-08
申请号：US15345668
申请日：2016-11-08
发明人： Hideaki Shiozawa
CPC分类号： H04W52/029 , H04B1/0014 , H04B1/0017 , H04B1/16 , Y02D70/00
摘要： A receiving circuit includes a receiver configured to receive a signal, a detector configured to detect arrival of a reception signal based on a signal received by the receiver, a buffer configured to store therein data corresponding to the reception signal, a demodulation processor configured to demodulate data to be supplied, and a controller configured to store the data corresponding to the reception signal in the buffer when the detector does not detect the arrival of the reception signal, and to supply the data stored in the buffer to the demodulation processor when the detector detects the arrival of the reception signal.
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公开(公告)号：US09774440B2
公开(公告)日：2017-09-26
申请号：US14941376
申请日：2015-11-13
CPC分类号： H04L5/1461 , H04B1/0017 , H04L5/14
摘要： A full-duplex RF communication system and corresponding methods use digital adaptive filters for interference cancellation. As provided, the techniques allow full-duplex radio frequency communication without frequency-, time-, or code-division multiplexing and without the use of hardware RF cancellers, in real-time. Such techniques may be useful for wireless communication, such a cellular communication, radio communication, broadcasting, short-range point-to-point communication, wireless sensor networks, and wireless computer networks.
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公开(公告)号：US09673848B2
公开(公告)日：2017-06-06
申请号：US14987093
申请日：2016-01-04
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.
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44.发明申请公开(公告)号：US20170019203A1
公开(公告)日：2017-01-19
申请号：US15193501
申请日：2016-06-27
申请人： FUJITSU LIMITED
发明人： Soleim ASM , Taku Saito
CPC分类号： H04J14/02 , H04B1/0017 , H04B10/25 , H04B10/61 , H04B10/616
摘要： An optical receiver, that receives wavelength division multiplexed light including a target channel, includes: a receiver configured to generate an electric signal from input light that includes the target channel; an A/D converter configured to convert the electric signal generated by the receiver into a digital signal; a digital filter configured to filter the digital signal output from the A/D converter with a first frequency characteristic; and a filter controller configured to control a frequency characteristic of the digital filter. The filter controller changes the frequency characteristic of the digital filter from the first frequency characteristic to a second frequency characteristic in stages when a filter control instruction that specifies the second frequency characteristic is given to the filter controller.
摘要翻译： 一种接收包括目标信道的波分复用光的光接收机，包括：被配置为从包括目标信道的输入光产生电信号的接收机; A / D转换器，被配置为将由接收器产生的电信号转换为数字信号; 数字滤波器，被配置为以第一频率特性对从A / D转换器输出的数字信号进行滤波; 以及滤波器控制器，被配置为控制数字滤波器的频率特性。 当向滤波器控制器给出指定第二频率特性的滤波器控制指令时，滤波器控制器将数字滤波器的频率特性从第一频率特性逐级地改变为第二频率特性。
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45.发明申请RECEIVER, COMMUNICATION UNIT, AND METHOD FOR DOWN-CONVERTING A RADIO FREQUENCY SIGNAL 审中-公开接收机，通信单元和下变频无线电信号的方法公开(公告)号：US20170012655A1
公开(公告)日：2017-01-12
申请号：US15205170
申请日：2016-07-08
CPC分类号： H03H15/023 , G06F17/11 , H03H15/00 , H03H21/0023 , H04B1/0014 , H04B1/0017 , H04B1/26
摘要： There is provided a communication receiver comprising: an input for receiving a radio frequency, RF, input signal; and at least one finite impulse response, FIR, discrete time filter, DTF. The at least one FIR DTF comprises: an input circuit comprising an input port for sampling the RF input signal at a sampling frequency that is comparable to the input RF input signal; and N parallel branches, each branch having a set of input unit sampling capacitances, where each unit sampling capacitance is independently selectively coupleable to an output summing node. The input circuit is configured to convert an equivalent input impedance of the at least one FIR DTF around the sampling frequency to a real impedance.
摘要翻译： 提供了一种通信接收机，包括：用于接收射频，RF，输入信号的输入; 和至少一个有限脉冲响应，FIR，离散时间滤波器，DTF。 所述至少一个FIR DTF包括：输入电路，包括用于以与所述输入RF输入信号相当的采样频率对所述RF输入信号进行采样的输入端口; 和N个并行分支，每个分支具有一组输入单元采样电容，其中每个单位采样电容独立地选择性地耦合到输出求和节点。 输入电路被配置为将采样频率周围的至少一个FIR DTF的等效输入阻抗转换为实际阻抗。
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公开(公告)号：US20170005677A1
公开(公告)日：2017-01-05
申请号：US15260563
申请日：2016-09-09
发明人： Branislav Petrovic , Michael Farese
CPC分类号： H04B1/0475 , H03F1/0222 , H03F1/3241 , H03F3/19 , H03F3/191 , H03F3/21 , H03F3/245 , H03F2200/165 , H03F2200/451 , H03G3/004 , H03H21/0012 , H03H2021/0085 , H04B1/0017 , H04B2001/0408 , H04B2001/0416 , H04B2001/0425
摘要： Systems and methods for controlling a power amplifier includes combining a digital modulated data signal with a digital bias signal to generate a combined digital signal, the digital bias signal generated based on an envelope for the modulated data signal; converting, by a digital-to-analog converter, the combined digital signal into a combined analog signal, the combined analog signal comprising an analog modulated data signal and an analog envelope bias signal; and separating the analog modulated data signal and the analog bias signal onto separate signal paths, wherein the converting is performed using a single digital-to-analog converter.
摘要翻译： 用于控制功率放大器的系统和方法包括将数字调制数据信号与数字偏置信号组合以产生组合的数字信号，所述数字偏置信号基于用于调制数据信号的包络线产生; 通过数模转换器将组合的数字信号转换为组合模拟信号，该组合模拟信号包括模拟调制数据信号和模拟包络偏置信号; 以及将模拟调制数据信号和模拟偏置信号分离到单独的信号路径上，其中使用单个数模转换器执行转换。
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47.发明申请SYSTEM AND METHOD FOR INCREASING BANDWIDTH FOR DIGITAL PREDISTORTION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS 审中-公开用于增加多通道宽带通信系统中数字预测的带宽的系统和方法公开(公告)号：US20160191087A1
公开(公告)日：2016-06-30
申请号：US14918371
申请日：2015-10-20
CPC分类号： H04B1/0475 , H03F1/3241 , H03F1/3247 , H04B1/0017 , H04B2001/0425 , H04L27/368
摘要： A method of operating a communications system includes receiving a signal at a digital predistorter (DPD), introducing predistortion to the signal using the DPD, and converting the predistorted signal to an analog signal using a digital-to-analog converter having a first bandwidth. The method also includes amplifying the analog signal, sampling the amplified signal using an analog-to-digital converter having a second bandwidth less than the first bandwidth, and extracting coefficients of the DPD from the sampled signal.
摘要翻译： 一种操作通信系统的方法包括在数字预失真器（DPD）处接收信号，使用DPD将预失真引入信号，以及使用具有第一带宽的数模转换器将预失真信号转换为模拟信号。 该方法还包括放大模拟信号，使用具有小于第一带宽的第二带宽的模数转换器对放大信号进行采样，以及从采样信号中提取DPD的系数。
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公开(公告)号：US20160099732A1
公开(公告)日：2016-04-07
申请号：US14505223
申请日：2014-10-02
发明人： Branislav Petrovic , Michael Farese
IPC分类号： H04B1/04
CPC分类号： H04B1/0475 , H03F1/0222 , H03F1/3241 , H03F3/19 , H03F3/191 , H03F3/21 , H03F3/245 , H03F2200/165 , H03F2200/451 , H03G3/004 , H03H21/0012 , H03H2021/0085 , H04B1/0017 , H04B2001/0408 , H04B2001/0416 , H04B2001/0425
摘要： Systems and methods for controlling a power amplifier includes combining a digital modulated data signal with a digital bias signal to generate a combined digital signal, the digital bias signal generated based on an envelope for the modulated data signal; converting, by a digital-to-analog converter, the combined digital signal into a combined analog signal, the combined analog signal comprising an analog modulated data signal and an analog envelope bias signal; and separating the analog modulated data signal and the analog bias signal onto separate signal paths, wherein the converting is performed using a single digital-to-analog converter.
摘要翻译： 用于控制功率放大器的系统和方法包括将数字调制数据信号与数字偏置信号组合以产生组合的数字信号，所述数字偏置信号基于用于调制数据信号的包络线产生; 通过数模转换器将组合的数字信号转换为组合模拟信号，该组合模拟信号包括模拟调制数据信号和模拟包络偏置信号; 以及将模拟调制数据信号和模拟偏置信号分离到单独的信号路径上，其中使用单个数模转换器执行转换。
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公开(公告)号：US09258022B2
公开(公告)日：2016-02-09
申请号：US14552231
申请日：2014-11-24
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。
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50.发明授权System and method for increasing bandwidth for digital predistortion in multi-channel wideband communication systems 有权用于增加多通道宽带通信系统中数字预失真的带宽的系统和方法公开(公告)号：US09197259B2
公开(公告)日：2015-11-24
申请号：US14480267
申请日：2014-09-08
CPC分类号： H04B1/0475 , H03F1/3241 , H03F1/3247 , H04B1/0017 , H04B2001/0425 , H04L27/368
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。
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