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201. 发明申请

US20160080082A1 REMOTELY RECONFIGURABLE DISTRIBUTED ANTENNA SYSTEM AND METHODS 有权
标题翻译：远程可重配置分布式天线系统及方法
公开(公告)号：US20160080082A1
公开(公告)日：2016-03-17
申请号：US14949405
申请日：2015-11-23
申请人： DALI SYSTEMS CO. LTD.
发明人： Paul Lemson , Shawn Patrick Stapleton , Sasa Trajkovic , Albert S. Lee
IPC分类号： H04B10/2575 , H04W88/08
CPC分类号： H04W72/0453 , H03F1/3247 , H03F3/24 , H03F2200/204 , H03F2201/3224 , H03F2201/3233 , H04B10/2575 , H04B10/25753 , H04L5/0032 , H04L5/0048 , H04L25/02 , H04L45/56 , H04L47/125 , H04Q11/0067 , H04Q2011/0081 , H04Q2213/1301 , H04W24/02 , H04W40/02 , H04W72/0486 , H04W88/085
摘要： The present disclosure is a novel utility of a software defined radio (SDR) based Distributed Antenna System (DAS) that is field reconfigurable and support multi-modulation schemes (modulation-independent), multi-carriers, multi-frequency bands and multi-channels. The present disclosure enables a high degree of flexibility to manage, control, enhance, facilitate the usage and performance of a distributed wireless network such as flexible simulcast, automatic traffic load-balancing, network and radio resource optimization, network calibration, autonomous/assisted commissioning, carrier pooling, automatic frequency selection, frequency carrier placement, traffic monitoring, traffic tagging, pilot beacon, etc.
摘要翻译：本公开是基于软件定义无线电（SDR）的分布式天线系统（DAS）的新颖实用性，其是现场可重配置并支持多调制方案（不依赖于调制的），多载波，多频带和多信道。本公开使得能够高度灵活地管理，控制，增强，促进分布式无线网络的使用和性能，例如灵活的联播，自动流量负载平衡，网络和无线电资源优化，网络校准，自主/辅助调试载波池，自动频率选择，载波放置，流量监控，流量标签，导频信标等。

202. 发明授权

US09225295B2 Distortion compensation apparatus and distortion compensation method 有权
标题翻译：失真补偿装置和失真补偿方法
公开(公告)号：US09225295B2
公开(公告)日：2015-12-29
申请号：US13869551
申请日：2013-04-24
申请人： FUJITSU LIMITED
发明人： Hiroyoshi Ishikawa , Satoshi Matsubara , Hideharu Shako , Kazuo Nagatani
IPC分类号： H03F1/26 , H03F1/32 , H03F3/24
CPC分类号： H03F1/3247 , H03F3/24 , H03F2200/321 , H03F2201/3224 , H03F2201/3233
摘要： A distortion compensation apparatus including: a processor configured to generate a pre-distortion signal by compensating an input signal for a distortion based on a distortion compensation coefficient and a plurality of delayed signals obtained by delaying the input signal by a plurality of amounts of delay, and an amplifier configured to generate an amplified signal by amplifying the pre-distortion signal, wherein the processor calculates the distortion compensation coefficient based on the input signal, the pre-distortion signal, and the amplified signal, and calculates the plurality of amounts of delay based on the amplified signal.
摘要翻译：一种失真补偿装置，包括：处理器，被配置为通过基于失真补偿系数补偿失真的输入信号和通过将输入信号延迟多个延迟而获得的多个延迟信号来产生预失真信号，以及放大器，被配置为通过放大所述预失真信号来产生放大信号，其中所述处理器基于所述输入信号，所述预失真信号和所述放大信号来计算所述失真补偿系数，并且计算所述多个延迟量基于放大的信号。

203. 发明授权

US09209753B2 Predistortion correction method, predistortion correction apparatus, transmitter, and base station 有权
标题翻译：预失真校正方法，预失真校正装置，发射机和基站
公开(公告)号：US09209753B2
公开(公告)日：2015-12-08
申请号：US14552056
申请日：2014-11-24
申请人： Huawei Technologies Co., Ltd.
发明人： Yuxiang Xiao , Erni Zhu , Anding Zhu
IPC分类号： H04K1/02 , H04L25/03 , H04L25/49 , H03F1/32 , H03F3/19 , H03F3/24 , H04B1/04
CPC分类号： H03F1/3247 , H03F1/3241 , H03F1/3252 , H03F1/3258 , H03F3/19 , H03F3/24 , H03F3/245 , H03F2200/36 , H03F2200/39 , H03F2200/451 , H03F2201/3209 , H03F2201/3215 , H03F2201/3224 , H03F2201/3227 , H04B1/0475 , H04B2001/0408 , H04B2001/0425 , H04L27/368
摘要： A predistortion correction method, a predistortion correction apparatus, a transmitter, and a base station are provided. The method includes: performing, based on a digital predistortion model, non-linear processing on an input transmit signal to obtain higher-order distortion time-domain signals; and obtaining, after performing processing on the higher-order distortion time-domain signals, a predistortion signal to be input to a power amplifier, where a process of converting the higher-order distortion time-domain signals to the predistortion signal includes bandwidth limitation processing, so that the predistortion signal to be input to the power amplifier is a predistortion signal within a preset bandwidth. Embodiments of the present invention can ensure predistortion accuracy, and can also reduce a requirement for a bandwidth and a sampling rate of a feedback channel, thereby reducing a predistortion cost.
摘要翻译：提供了预失真校正方法，预失真校正装置，发射机和基站。该方法包括：基于数字预失真模型对输入发射信号进行非线性处理，以获得更高阶失真时域信号; 在对高阶失真时域信号执行处理之后，获得要输入到功率放大器的预失真信号，其中将高阶失真时域信号转换为预失真信号的处理包括带宽限制处理，使得要输入到功率放大器的预失真信号是预设带宽内的预失真信号。本发明的实施例可以确保预失真精度，并且还可以减少对反馈信道的带宽和采样率的要求，从而降低预失真成本。

204. 发明申请

US20150349725A1 DISTORTION-COMPENSATION DEVICE AND DISTORTION-COMPENSATION METHOD 有权
标题翻译：失真补偿装置和失真补偿方法
公开(公告)号：US20150349725A1
公开(公告)日：2015-12-03
申请号：US14655217
申请日：2013-11-29
申请人： PANASONIC CORPORATION
发明人： Yoshito HIRAI , Kouji OKAMOTO
IPC分类号： H03F1/32 , H03F3/19 , H04B1/04
CPC分类号： H03F1/3247 , H03F1/3241 , H03F3/189 , H03F3/19 , H03F3/24 , H03F2200/451 , H03F2201/3224 , H04B1/0475 , H04B2001/0425
摘要： Disclosed is a distortion-compensation apparatus that can reduce the storage space for storing coefficients required for distortion-compensation calculation, and can accurately execute distortion compensation. Distortion-compensation apparatus (100) compensates for distortion of an output signal from a predetermined circuit by predistortion in which an input signal is preliminarily multiplied by a coefficient. First multiplication section (200c) of distortion-compensation apparatus (100) multiplies an input signal by a first coefficient selected from coefficient candidates in accordance with the input signal; second multiplication section (201c1 to 201cm) multiplies a delay signal of an input signal by a tap coefficient; and adding section (202) outputs a signal obtained by adding together an input signal multiplied by the compensation coefficient and the delay signal multiplied by the tap coefficient to the predetermined circuit.
摘要翻译：公开了一种失真补偿装置，其可以减少用于存储失真补偿计算所需的系数的存储空间，并且可以精确地执行失真补偿。失真补偿装置（100）通过预输入信号预先乘以系数的预失真来补偿来自预定电路的输出信号的失真。失真补偿装置（100）的第一乘法部（200c）根据输入信号将输入信号乘以从系数候选中选择的第一系数; 第二乘法部分（201c1至201cm）将输入信号的延迟信号乘以抽头系数; 和加法部分（202）输出通过将乘以补偿系数的输入信号和乘以抽头系数的延迟信号相加到预定电路而获得的信号。

205. 发明申请

US20150333781A1 RF TRANSCEIVER FRONT END MODULE WITH IMPROVED LINEARITY 审中-公开
标题翻译： RF收发器前端模块具有改进的线性
公开(公告)号：US20150333781A1
公开(公告)日：2015-11-19
申请号：US14715307
申请日：2015-05-18
申请人： Skyworks Solutions, Inc.
发明人： Ziv Alon , Maxwell L. Thomas
IPC分类号： H04B1/04 , H03F3/19 , H04W88/02 , H03F3/21
CPC分类号： H03F3/19 , H03F1/0227 , H03F1/3247 , H03F3/21 , H03F3/245 , H03F2200/451 , H03F2201/3224 , H04B1/0475 , H04B1/30 , H04B2001/0425 , H04B2001/0433 , H04W88/02
摘要： A power amplifier system front end measures both forward and reverse power associated with an RF transmit signal. A processor is configured to use measurements derived from the measured forward and reverse power output to adjust the RF transmit signal in order to compensate for one or more memory effects of the power amplifier system.
摘要翻译：功率放大器系统前端测量与RF发射信号相关联的正向和反向功率。处理器被配置为使用从测量的正向和反向功率输出导出的测量来调整RF发射信号，以便补偿功率放大器系统的一个或多个存储器效应。

206. 发明申请

US20150326190A1 Radio Frequency Power Amplifier Non-Linearity Compensation 有权
标题翻译：射频功率放大器非线性补偿
公开(公告)号：US20150326190A1
公开(公告)日：2015-11-12
申请号：US14492828
申请日：2014-09-22
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Ulf Gustavsson
IPC分类号： H03F1/32 , H03F3/21 , H03F3/19
CPC分类号： H03F1/3241 , H03F1/26 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/245 , H03F2200/451 , H03F2201/3215 , H03F2201/3224 , H03F2201/3233 , H04B1/0475 , H04B2001/0425
摘要： There is provided compensation for non-linear effects caused by a radio frequency power amplifier. An input sequence is acquired. A pre-distortion parameter is determined based on the input sequence. The pre-distortion parameter is based on a block matrix pseudo-inverse of a regression matrix comprising permutations of the input sequence. The regression matrix is decomposed into at least two block matrices based on at least one physical property of the radio frequency power amplifier.
摘要翻译：提供了由射频功率放大器引起的非线性效应的补偿。获取输入序列。基于输入序列确定预失真参数。预失真参数基于包括输入序列的排列的回归矩阵的块矩阵伪逆。基于射频功率放大器的至少一个物理特性，将回归矩阵分解为至少两个块矩阵。

207. 发明授权

US09160280B1 Memory polynomial based digital predistorter 有权
标题翻译：基于存储多项式的数字预失真器
公开(公告)号：US09160280B1
公开(公告)日：2015-10-13
申请号：US14284362
申请日：2014-05-21
申请人： KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
发明人： Abubaker Hassan Abdelhafiz , Oualid Hammi , Azzedine Zerguine , Ali Taleb Al-Awami
IPC分类号： H03F1/32 , H03F3/21
CPC分类号： H03F1/3258 , H03F1/3241 , H03F1/3247 , H03F3/21 , H03F2200/129 , H03F2201/3224 , H04B1/0475 , H04B2001/0425
摘要： The memory polynomial based digital predistorter utilizes a cluster-based particle swarm optimization (PSO) technique and has an embedded model-size estimator. The PSO technique and model-size estimator efficiently find the dimensions and accurately estimate the coefficients of the memory polynomial based digital predistorter for improved linearity of a power amplifier.
摘要翻译：基于存储多项式的数字预失真器利用基于簇的粒子群优化（PSO）技术，并具有嵌入式模型大小估计器。 PSO技术和模型大小估计器有效地找到尺寸并准确估计了基于存储器多项式的数字预失真器的系数，以改善功率放大器的线性度。

208. 发明授权

US09137078B2 Daisy-chained ring of remote units for a distributed antenna system 有权
公开(公告)号：US09137078B2
公开(公告)日：2015-09-15
申请号：US14260145
申请日：2014-04-23
申请人： DALI SYSTEMS CO., LTD.
发明人： Shawn Patrick Stapleton , Paul Lemson , Bin Lin , Albert S. Lee
IPC分类号： H04W4/00 , H04L27/26 , H03F1/32 , H03F3/24 , H04L25/03 , H04L27/36 , H04W24/02 , H04B1/04 , H04W24/04 , H04W40/00
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： The present disclosure is a novel utility of a software defined radio (SDR) based Distributed Antenna System (DAS) that is field reconfigurable and support multi-modulation schemes (modulation-independent), multi-carriers, multi-frequency bands and multi-channels. More specifically, the present invention relates to a DAS utilizing one or more Daisy-Chained Rings of Remote Units. The present invention enables a high degree of flexibility to manage, control, enhance, facilitate the usage and performance of a distributed wireless network such as Flexible Simulcast, automatic traffic load-balancing, network and radio resource optimization, network calibration, autonomous/assisted commissioning, carrier pooling, automatic frequency selection, frequency carrier placement, traffic monitoring, traffic tagging, pilot beacon, etc. As a result, a DAS in accordance with the present invention can increase the efficiency and traffic capacity of the operators' wireless network.

209. 发明授权

US09077297B2 Power amplifier time-delay invariant predistortion methods and apparatus 有权
标题翻译：功率放大器延时不变预失真方法和装置
公开(公告)号：US09077297B2
公开(公告)日：2015-07-07
申请号：US13724157
申请日：2012-12-21
申请人： Dali Systems Co. Ltd.
发明人： Dali Yang , Jia Yang
IPC分类号： H04B1/04 , H03F1/32 , H03F3/24
CPC分类号： H03F1/3247 , H03F1/3241 , H03F3/24 , H03F2200/451 , H03F2200/57 , H03F2201/3224 , H03F2201/3233 , H04B1/0475 , H04B2001/0425 , H04L1/0044
摘要： An embodiment of the invention is a time-delay invariant predistortion approach to linearize power amplifiers in wireless RF transmitters. The predistortion architecture is based on the stored-compensation or memory-compensation principle by using a combined time-delay addressing method, and therefore, the architecture has an intrinsic, self-calibrating time-delay compensation function. The predistortion architecture only uses a lookup table to conduct both the correction of non-linear responses of a power amplifier and the compensation of any time-delay effects presented in the same system. Due to the time-delay invariant characteristic, the predistortion design has a wider dynamic range processing advantage for wireless RF signals, and therefore can be implemented in multi-carrier and multi-channel wireless systems.
摘要翻译：本发明的实施例是用于线性化无线RF发射机中的功率放大器的时间延迟不变预失真方法。预失真架构通过使用组合的时间延迟寻址方法基于存储补偿或存储器补偿原理，因此该架构具有内在的自校准时间延迟补偿功能。预失真架构仅使用查找表来进行功率放大器的非线性响应的校正以及在同一系统中呈现的任何时间延迟效应的补偿。由于时延不变特性，预失真设计对于无线RF信号具有更广泛的动态范围处理优势，因此可以在多载波和多信道无线系统中实现。

210. 发明授权

US09048797B2 High efficiency, remotely reconfigurable remote radio head unit system and method for wireless communications 有权
标题翻译：高效，远程可重构的远程无线电头单元系统和无线通信方法
公开(公告)号：US09048797B2
公开(公告)日：2015-06-02
申请号：US14335647
申请日：2014-07-18
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 , H03F1/32 , H03F3/68 , H04B1/00 , 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.
摘要翻译：公开了一种远程无线电头单元（RRU）系统。本发明基于对RRU内的功率放大器进行线性化的自适应数字预失真的方法。诸如放大器输出信号的线性度和非对称失真的功率放大器特性由宽带反馈路径监测并由数字模块中的自适应算法控制。因此，本发明的实施例可以补偿功率放大器系统的非线性以及存储器效应，并且在功率附加效率，相邻信道泄漏比和峰值与平均功率比方面也提高性能。本公开使得功率放大器系统能够是现场可重构的并且支持多调制方案（不可调制调制），多载波，多频带和多信道。因此，远程无线电头系统特别适用于诸如基站，中继器和室内信号覆盖系统之类的无线传输系统。

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