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1. 发明申请

US20180227152A1 MODULATION AGNOSTIC DIGITAL HYBRID MODE POWER AMPLIFIER SYSTEM AND METHOD 审中-公开
公开(公告)号：US20180227152A1
公开(公告)日：2018-08-09
申请号：US15827794
申请日：2017-11-30
申请人： Dali Systems Co. Ltd.
发明人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Ying Xiao
IPC分类号： H04L27/00 , H04L27/36 , H03F1/30 , H03F1/32 , H03F3/08 , H03F3/19 , H03F3/24 , H04W24/02 , H04L25/08 , H04L25/06
CPC分类号： H03F1/304 , H03F1/3241 , H03F1/3247 , H03F1/3258 , H03F3/087 , H03F3/19 , H03F3/24 , H03F2200/18 , H03F2200/204 , H03F2200/207 , H03F2200/447 , H03F2200/451 , H03F2201/3206 , H03F2201/3209 , H03F2201/3212 , H03F2201/3215 , H03F2201/3224 , H03F2201/3227 , H04L25/067 , H04L25/08 , H04L27/0008 , H04L27/368 , H04W24/02
摘要： A RF-digital hybrid mode power amplifier system for achieving high efficiency and high linearity in wideband communication systems is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier in the RF domain. The present disclosure enables a power amplifier system to be field reconfigurable and support multi-modulation schemes (modulation agnostic), multi-carriers and multi-channels. As a result, the digital hybrid mode power amplifier system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems, where baseband I-Q signal information is not readily available.

2. 发明授权

US09966906B2 Radio apparatus and abnormality detecting method 有权
公开(公告)号：US09966906B2
公开(公告)日：2018-05-08
申请号：US15496124
申请日：2017-04-25
申请人： FUJITSU LIMITED
发明人： Akihiko Komatsuzaki , Satoshi Matsubara , Shinichiro Kobayashi , Hideharu Shako
IPC分类号： H04L25/03 , H03F1/32 , H03F3/195 , H03F3/24
CPC分类号： H03F1/3247 , H03F3/195 , H03F3/245 , H03F2200/451 , H03F2201/3224 , H03F2201/3233
摘要： A radio apparatus includes an amplifier that amplifies electrical power of a signal that is wirelessly transmitted, and a processor that executes a process including: performing, by using a distortion compensation coefficient that compensates distortion generated in the amplifier, distortion compensation of an input signal; reading, from a predetermined memory, a threshold that varies in accordance with the electrical power of the input signal; and comparing the read threshold with a monitoring target which includes the distortion compensation coefficient used with respect to the input signal to monitor whether an abnormality is present in the distortion compensation of the input signal.

3. 发明授权

US09948332B2 High efficiency, remotely reconfigurable remote radio head unit system and method for wireless communications 有权
公开(公告)号：US09948332B2
公开(公告)日：2018-04-17
申请号：US14703579
申请日：2015-05-04
申请人： Dali Systems Co. Ltd.
发明人： Wan-Jong Kim , Kyoung-Joon Cho , Shawn Patrick Stapleton , Ying Xiao
IPC分类号： H04L25/49 , H04B1/04 , H03F1/32 , H03F3/24 , H03F3/68 , H04B1/00 , H04W24/02 , H04W84/04 , H04W88/08
CPC分类号： H04B1/0475 , H03F1/3247 , H03F3/24 , H03F3/68 , H03F2201/3224 , H04B1/0064 , H04W24/02 , H04W84/047 , H04W88/08 , H04W88/085 , Y02D70/00 , Y02D70/122 , Y02D70/1242 , Y02D70/1262 , Y02D70/142 , Y02D70/146 , Y02D70/40
摘要： A remote radio head unit (RRU) system is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier inside the RRU. The power amplifier characteristics such as variation of linearity and asymmetric distortion of the amplifier output signal are monitored by a wideband feedback path and controlled by the adaptation algorithm in a digital module. Therefore, embodiments of the present invention can compensate for the nonlinearities as well as memory effects of the power amplifier systems and also improve performance, in terms of power added efficiency, adjacent channel leakage ratio and peak-to-average power ratio. The present disclosure enables a power amplifier system to be field reconfigurable and support multi-modulation schemes (modulation agnostic), multi-carriers, multi-frequency bands and multi-channels. Consequentially, the remote radio head system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems.

4. 发明授权

US09913194B2 Method and system for baseband predistortion linearization in multi-channel wideband communication systems 有权
公开(公告)号：US09913194B2
公开(公告)日：2018-03-06
申请号：US14991264
申请日：2016-01-08
申请人： Dali Wireless, Inc.
发明人： Wan-Jong Kim , Kyoung Joon Cho , Jong Heon Kim , Shawn Patrick Stapleton
IPC分类号： H03H7/30 , H04W40/02 , H03F1/32 , H03F3/24 , H04L25/03 , H04L27/36 , H04W24/02 , H04B1/04 , H04W24/04 , H04W40/00 , H04L27/26 , H04W72/04 , H04B7/022
CPC分类号： H04W40/02 , H03F1/3247 , H03F3/24 , H03F2200/336 , H03F2200/57 , H03F2201/3224 , H03F2201/3233 , H04B1/0475 , H04B7/022 , H04B2001/0425 , H04L25/03343 , H04L27/2618 , H04L27/362 , H04L2025/03414 , H04W24/02 , H04W24/04 , H04W40/00 , H04W72/04 , H04W72/0453
摘要： An efficient baseband predistortion linearization method using effective multiplexing modulation technique such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. The present invention is based on the method of piecewise pre-equalized lookup table based predistortion, which is a cascade of a lookup table predistortion and piecewise pre-equalizers.

5. 发明授权

US09768739B2 Digital hybrid mode power amplifier system 有权
公开(公告)号：US09768739B2
公开(公告)日：2017-09-19
申请号：US14271881
申请日：2014-05-07
申请人： DALI SYSTEMS CO. LTD.
发明人： Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Jong Heon Kim , Dali Yang
IPC分类号： H04B1/04 , H03F1/32 , H03F3/24 , H03F3/19 , H03F3/20
CPC分类号： H03F1/3247 , H03F1/3258 , H03F3/19 , H03F3/20 , H03F3/24 , H03F2200/129 , H03F2200/451 , H03F2201/3224 , H03F2201/3227 , H03F2201/3233
摘要： A RF-digital hybrid mode power amplifier system for achieving high efficiency and high linearity in wideband communication systems is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier in the RF domain. The power amplifier characteristics such as variation of linearity and asymmetric distortion of the amplifier output signal are monitored by the narrowband feedback path and controlled by the adaptation algorithm in a digital module. Therefore, the present invention could compensate the nonlinearities as well as memory effects of the power amplifier systems and also improve performances, in terms of power added efficiency, adjacent channel leakage ratio and peak-to-average power ratio. The present disclosure enables a power amplifier system to be field reconfigurable and support multi-modulation schemes (modulation agnostic), multi-carriers and multi-channels. As a result, the digital hybrid mode power amplifier system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems, where baseband I-Q signal information is not readily available.

6. 发明授权

US09760338B2 Direct digital synthesis of signals using maximum likelihood bit-stream encoding 有权
公开(公告)号：US09760338B2
公开(公告)日：2017-09-12
申请号：US15187651
申请日：2016-06-20
申请人： Intel Corporation
发明人： Kameran Azadet
IPC分类号： G06F5/01 , G06F17/15 , H03H17/06 , H04B1/04 , H04L1/00 , H04L27/233 , H04B1/62 , G06F9/30 , H04L25/02 , H04L25/03 , H03M3/00 , H03F1/02 , H03F1/32 , H03F3/189 , H03F3/24 , H04L25/49 , H04B1/00
CPC分类号： G06F9/3001 , G06F5/01 , G06F9/30036 , G06F17/15 , H03F1/0288 , H03F1/3241 , H03F1/3258 , H03F3/189 , H03F3/24 , H03F2200/336 , H03F2201/3209 , H03F2201/3212 , H03F2201/3224 , H03F2201/3233 , H03H17/06 , H03M3/30 , H04B1/0003 , H04B1/0475 , H04B1/62 , H04B2001/0408 , H04L1/0054 , H04L25/02 , H04L25/03 , H04L25/03178 , H04L25/03216 , H04L25/4917 , H04L27/2334
摘要： Methods and apparatus are provided for direct synthesis of RF signals using maximum likelihood sequence estimation. An RF digital RF input signal is synthesized by performing maximum likelihood sequence estimation on the digital RF input signal to produce a digital stream, such that after filtering by a prototype filter the produced digital stream produces a substantially minimum error. The substantially minimum error comprises a difference between a digital output of the prototype filter and the digital RF input signal. The digital stream is substantially equal to the input digital RF signal. The digital stream can be applied to an analog restitution filter, and the output of the analog restitution filter comprises an analog RF signal that approximates the digital RF input signal.

7. 发明申请

US20170054457A1 FREQUENCY SWITCHING WITHIN TIME DOMAIN DIGITAL PRE-DISTORTION 有权
标题翻译：在时域数字预失真中进行频率切换
公开(公告)号：US20170054457A1
公开(公告)日：2017-02-23
申请号：US14829296
申请日：2015-08-18
申请人： NOKIA SOLUTIONS AND NETWORKS OY
发明人： Antti HEISKANEN , Eero KOUKKARI
IPC分类号： H04B1/04 , H03F3/19 , H03F3/24 , H03F1/32
CPC分类号： H04B1/0475 , H03F1/3247 , H03F3/19 , H03F3/24 , H03F3/245 , H03F2200/451 , H03F2201/3224 , H04B2001/0408
摘要： Appropriate signal processing may be beneficial in a variety of communication systems and elements thereof For example, time domain digital pre-distortion may benefit from suitable treatment of frequency switching. A method can include determining whether an instantaneous frequency of an input signal is positive or negative. The method can also include selecting a pre-distortion model from a set of pre-distortion models based on the determination of positive or negative instantaneous frequency. The method can further include applying the selected pre-distortion model to the input signal for a time corresponding to the determination of instantaneous frequency to provide an output signal. The method can additionally include providing the output signal to a power amplifier.
摘要翻译：适当的信号处理在各种通信系统及其元件中可能是有益的。例如，时域数字预失真可以受益于频率切换的适当处理。方法可以包括确定输入信号的瞬时频率是正还是负。该方法还可以包括基于正或负瞬时频率的确定从一组预失真模型中选择预失真模型。该方法还可以包括将所选择的预失真模型应用于输入信号一段与瞬时频率的确定相对应的时间以提供输出信号。该方法还可以包括向功率放大器提供输出信号。

8. 发明申请

US20170033969A1 SYSTEM AND METHOD FOR DIGITAL MEMORIZED PREDISTORTION FOR WIRELESS COMMUNICATION 审中-公开
标题翻译：用于无线通信的数字记录预测系统和方法
公开(公告)号：US20170033969A1
公开(公告)日：2017-02-02
申请号：US15173887
申请日：2016-06-06
申请人： Dali Systems Co. Ltd.
发明人： Dali Yang , Jia Yang
IPC分类号： H04L27/36 , H03F3/24 , H03F3/19 , H04L1/00 , H03F1/32
CPC分类号： H04L27/368 , H03F1/3247 , H03F3/189 , H03F3/19 , H03F3/195 , H03F3/24 , H03F3/245 , H03F2200/336 , H03F2200/451 , H03F2201/3224 , H03F2201/3227 , H03F2201/3233 , H04B1/0475 , H04L1/0043 , H04L1/0044 , H04L27/367 , H04W52/52
摘要： A power amplifier system includes an input operable to receive an original value that reflects information to be communicated and an address data former operable to generate a digital lookup table key. The power amplifier system also includes a predistortion lookup table coupled to the address data former and a power amplifier having an output and coupled to the predistortion lookup table. The power amplifier system further includes a feedback loop providing a signal associated with the output of the power amplifier to the predistortion lookup table and a switch disposed in the feedback loop and operable to disconnect the predistortion lookup table from the output of the power amplifier.
摘要翻译：功率放大器系统包括可操作以接收反映要传送的信息的原始值的输入和可操作以产生数字查找表密钥的地址数据表。功率放大器系统还包括耦合到地址数据形成器的预失真查找表和具有输出并耦合到预失真查找表的功率放大器。功率放大器系统还包括反馈回路，其将与功率放大器的输出相关联的信号提供给预失真查找表，以及设置在反馈回路中的开关，用于将预失真查找表与功率放大器的输出断开。

9. 发明授权

US09529567B2 Digital processor having instruction set with complex exponential non-linear function 有权
标题翻译：具有指令集的数字处理器具有复数指数非线性函数
公开(公告)号：US09529567B2
公开(公告)日：2016-12-27
申请号：US13701397
申请日：2012-10-26
申请人： Intel Corporation
发明人： Kameran Azadet , Albert Molina , Joseph H. Othmer , Parakalan Venkataraghavan , Meng-Lin Yu , Joseph Williams
IPC分类号： G06F9/30 , G06F5/01 , H04B1/04 , H04L1/00 , H04L27/233 , H04B1/62 , H04L25/02 , H04L25/03 , H03M3/00 , H03F1/02 , H03F1/32 , H03F3/189 , H03F3/24 , H04B1/00
CPC分类号： G06F9/3001 , G06F5/01 , G06F9/30036 , G06F17/15 , H03F1/0288 , H03F1/3241 , H03F1/3258 , H03F3/189 , H03F3/24 , H03F2200/336 , H03F2201/3209 , H03F2201/3212 , H03F2201/3224 , H03F2201/3233 , H03H17/06 , H03M3/30 , H04B1/0003 , H04B1/0475 , H04B1/62 , H04B2001/0408 , H04L1/0054 , H04L25/02 , H04L25/03 , H04L25/03178 , H04L25/03216 , H04L25/4917 , H04L27/2334
摘要： A digital processor is provided having an instruction set with a complex exponential function. The digital processor evaluates a complex exponential function for an input value, x, by obtaining a complex exponential software instruction having the input value, x, as an input; and in response to the complex exponential software instruction: invoking at least one complex exponential functional unit that implements complex exponential software instructions to apply the complex exponential function to the input value, x; and generating an output corresponding to the complex exponential of the input value, x. A complex exponential function for an input value, x, can be evaluated by wrapping the input value to maintain a given range; computing a coarse approximation angle using a look-up table; scaling the coarse approximation angle to obtain an angle from 0 to θ; and computing a fine corrective value using a polynomial approximation.
摘要翻译：提供了具有具有复指数函数的指令集的数字处理器。数字处理器通过获得具有输入值x的复数指数软件指令作为输入来评估输入值x的复指数函数; 并且响应于复杂的指数软件指令：调用至少一个复数指数函数单元，其执行复指数软件指令以将复指数函数应用于输入值x; 并产生与输入值x的复指数相对应的输出。输入值x的复数指数函数可以通过包装输入值来保持给定范围来评估; 使用查找表计算粗近似角度; 缩放粗近似角度以获得从0到θ的角度; 以及使用多项式近似计算精细校正值。

10. 发明申请

US20160352290A1 CIRCUITS FOR LINEARIZING AN OUTPUT SIGNAL OF A NON-LINEAR COMPONENT AND RELATED DEVICES AND METHODS 有权
标题翻译：用于线性化非线性组件的输出信号的电路及相关设备和方法
公开(公告)号：US20160352290A1
公开(公告)日：2016-12-01
申请号：US14403182
申请日：2014-11-22
申请人： Telefonaktiebolaget L M Ericssson (publ)
发明人： Bjorn Gavert , Tony Gustafsson
IPC分类号： H03F1/32 , H04B1/40 , H03F3/24
CPC分类号： H03F1/3241 , H03F1/3247 , H03F1/3258 , H03F3/195 , H03F3/24 , H03F3/245 , H03F2201/3209 , H03F2201/3212 , H03F2201/3224 , H03F2201/3233 , H04B1/40 , H04L25/03343 , H04L27/368
摘要： This disclosure provides a circuit for linearizing an output signal Sout produced by a non-linear component based on an input signal x(n). The circuit comprises a primary pre-distorter module configured to generate a pre-distorted signal y(n) based on the input signal x(n) and a primary pre-distortion function parameterized by a pre-distortion parameter λ and to feed the pre-distorted signal y(n) to the non-linear component. The circuit comprises an estimation module. The estimation module is configured to receive samples z(n) of the output signal Sout, and to determine the pre-distortion parameter λ. The estimation module comprises a secondary pre-distorter module configured to generate a secondary pre-distorter output signal r(n) based on a secondary pre-distortion function and the samples z(n) of the output signal Sout. The secondary pre-distorter module is configured to determine the pre-distortion parameter λ based on a previously determined pre-distortion parameter stored on a data storage, the secondary pre-distorter output signal r(n) and the pre-distorted signal y(n) provided by the primary pre-distorted module. The determining comprises correlating the input signal x(n) with an error signal between the pre-distorted signal y(n) and the secondary pre-distorter output signal r(n).
摘要翻译：本公开提供了一种用于基于输入信号x（n）线性化由非线性分量产生的输出信号Sout的电路。该电路包括：初级预失真器模块，被配置为基于输入信号x（n）和由预失真参数λ参数化的初级预失真函数产生预失真信号y（n）失真信号y（n）到非线性分量。电路包括估计模块。估计模块被配置为接收输出信号Sout的样本z（n），并且确定预失真参数λ。估计模块包括次级预失真器模块，其被配置为基于次级预失真功能和输出信号Sout的样本z（n）产生二次预失真器输出信号r（n）。次级预失真器模块被配置为基于存储在数据存储器上的先前确定的预失真参数来确定预失真参数λ，次级预失真器输出信号r（n）和预失真信号y（ n）由初级预失真模块提供。确定包括将输入信号x（n）与预失真信号y（n）和次预失真器输出信号r（n）之间的误差信号进行相关。

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