CN101479956B - 用于无线通信的高效率线性化功率放大器 - Google Patents
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Abstract
本发明的一个实施例使用预失真校正信号通过模拟乘法器来组合已调RF信号,用于对在诸如无线RF发射器中使用的具有非线性特性的功率放大器进行线性化。预失真控制器包含多个下转换器,用于取回理想的未失真信息和反馈的失真信息,以及存储在诸如查找表中的预存储的数字表征的预失真信息。数字表征的信息使高功率放大器的非线性特性模型化,并在对功率放大器进行预补偿处理之前存储。当预失真信息在模拟乘法器中与已调RF信号组合时,其结果是来自功率放大器的基本线性的信息传输。
Description
相关申请
本申请是2005年10月27日提交的美国专利申请S.N.11/262,079,标题为“System and Method for Digital MemorizedPredistortion for Wireless Communication”的部分继续申请,其依次是美国专利申请S.N.10/137,556、即现在的美国专利No.6,985,704,标题为“System and Method for Digital Memorized Predistortion forWireless Communication”[附件1]的继续申请,两个申请都通过参考并入本文。该申请还要求下列专利申请的优先权:2007年4月28日提交的美国临时专利申请S.N.60/795,820,标题为“High EfficiencyLinearization Power Amplifier For Wireless Communication”;2006年12月22日提交的美国临时专利申请S.N.60/876,640,标题为“PowerAmplifier Predistortion Methods and Apparatus”;2007年1月26日提交的美国临时专利申请S.N.60/897,746,标题为“Power AmplifierTime-Delay Invariant Predistortion Methods and Apparatus”;2007年1月29日提交的美国临时专利申请S.N.60/898,312,标题为“PowerAmplifier Time-Delay Invariant Predistortion Methods andApparatus”[附件2],上述申请也通过参考并入本文。
技术领域
本发明一般涉及无线通信系统,更具体涉及用于校正诸如在无线RF发射器中使用的功率放大器(PA)的非线性的系统、装置和方法。
背景技术
无线通信系统的基本组件是功率放大器(PA)。这种无线通信系统包括多种宽带和多媒体服务。在这种系统中,功率放大器得到无线RF发射器的支持。功率放大器的功率效率是系统整体运行效率的一个重要方面。长期以来,功率放大器的线性和效率已经成为无线系统设计者和用户所面对的两个最难的课题。这些问题与功率放大器的功率谱效率和功率效率都密切相关。
用于线性化无线通信系统中的功率放大器的现有预失真技术主要使用模拟预失真方法。有些技术也已经使用了数字调节组件,其借助于利用基带数字信号处理(DSP)技术的模拟前馈方法和数字预失真方法来实施。
传统的模拟预失真技术是基于误差扣除(error subtraction)和功率匹配来线性化功率放大器的原理。这些方法必须使用辅助功率放大器来精确地匹配主功率放大器的非线性,同时克服可随频率和环境温度发生变化的信号时延。因此,这种方法难以满足先进的无线通信系统的需求。
现有技术中基于DSP的预失真方法一般要求预失真子系统和电路设计依赖于基站中基带的I信号和Q信号,并因此必须将预失真处理嵌入基站的基带电路中。这就要求必须修改基站中现存的基带电路,对无线载体和设备制造商而言这是很不方便的高成本的解决方案。同样,当多调制方式和多载体信号通过功率放大器时,典型的基于DSP的预失真技术不适用于对功率放大器进行线性化。
发明内容
本发明包括通过对功率放大器的输入信号进行预失真来改进功率放大器的功率效率和线性的方法和装置。通过应用本发明的方法来预失真该信号,普通非线性功率放大器的变换特性则变为基本线性。因此,功率放大器更有效地使用功率并提供适用于无线信号传输的先进的性能特性。本发明可应用于广泛系列的无线通信系统(不论调制类型)以产生高质量的信号传输和扩展的网络容量。本领域技术人员将认识到其中描述的功率放大器还可以看作高功率放大器。
在本发明的一个实施例中,预失真控制器包含用于RF信号预失真处理的模拟外围电路和预失真核心处理器,以准备来自无线通信设备的功率放大器信号传输。
预失真控制器中的模拟外围电路包含分别在功率放大器输入和功率放大器的输出之前的模拟下转换器(down-converter)电路,以拾取来自无线系统中的调制器的理想化的信号,并将其与来自功率放大器的输出的失真的反馈信号进行比较。预失真核心处理器与查找表一起运行,其中该查找表存储通过数学计算的AM-AM和AM-PM失真分量获得的预失真信息。预失真处理器的输出提供预校正信号作为功率放大器的输入。通过乘法运算使预校正信号与来自RF调制器的信号组合,以产生提供给功率放大器作为输入的预失真输入信号。
根据如下阐述的随附附图能更好地理解预失真子系统的基本结构。
附图说明
图1示出具有根据本发明的一个实施例的预失真控制器的功率放大器模块的方块图。
图2表示图1的预失真控制器的一个实施例的简化结构。
图3更详细地示出图2的实施例。
图4示出图3中示出的预失真控制器中的查找表的运行和布置。
具体实施方式
本发明提供一种新的预失真控制器来线性化在无线网络中运行的无线基站中使用的功率放大器(PA),该无线网络使用广泛的多种信号类型,包括CDMA、TDMA、GSM、GPRS、3G系统(UMTS、W-CDMA、CDMA2000、TDS-CDMA、3GPP等)、WLAN、WiFi、WiMax等,以及通过使用高功率放大器发射复合已调信号的其它提议的和即将出现的无线系统(4G/5G)。因为无线RF发射器中的高功率放大器通常使RF输出信号失真,所以本发明的自适应预失真控制器对校正这种非线性是有用的。本发明的实施例适用于所有的无线基站、接入点以及诸如微波和卫星通信的其它无线通信系统。本发明的预失真控制器提供另外的优点,即,可以将该预失真控制器添加至现存的无线RF发射器而不必另外改变或修改基站结构,同时产生显著的性能改进。这些改进中包括基站效率的基本增加,其在功率使用方面产生了显著减少,因为在当前系统中,由于典型的功率放大器的非线性特性会导致显著的功率浪费。
根据下面的描述,将认识到其中公开的高效线性预失真控制器为无线产业提供以下好处:
1.通过改进功率放大器的传输特性和减少相邻通道干扰,显著增强了发射的信号质量并增加了无线网络容量。
2.可以将该高效预失真控制器实施为功率放大器的附加模块,其允许对功率放大器性能进行上述改进,而不改变或修改基站中现存的RF和基带电路。这不同于传统的反馈和前馈预失真方法,因此每当操作者期望升级性能并减少能耗时,对无线网络基础结构而言就是相对低成本、易于安装的解决方案。
3.预失真控制运行是快速和动态的,其允许对功率放大器的更宽范围内的非线性进行跟踪和校正,并使其尤其适用于在基站、转发器和手持机中使用。
4.可以将其集成到功率放大器的设计中,以便于对已经安装在无线系统中的老化的功率放大器进行安装和更换。
首先参考图1,可以了解本发明的基本布置。预失真控制器5接收已调RF信号6作为输入并接收反馈信号7,该反馈信号与功率放大器12的输出信号相关。预失真控制器依据由反馈信号7表征的功率放大器12的输出信号的非线性和失真特性对RF信号6进行修正,使得预失真控制器5的输出被供给功率放大器12以产生基本线性化和改进的功率放大器12的输出信号。
接着参考图2和图3,可以更详细地了解本发明的实施例。更具体地,例示的实施例包括模拟乘法器11,其接收来自基站的RF调制器部分10[图3]的已调RF信号vRF,并且还接收来自预失真处理器200的预失真校正信号vP,如在图2中大体示出且在图3中更详细示出以及下面所要更详细讨论的。模拟乘法器11的输出被提供给功率放大器(PA)12作为输入Vin,功率放大器(PA)12继而将输出信号VO传送给天线13。RF调制器10通常(未必一定)是直角相位调制器或正交调制器。将会认识到乘法器11可以实施为多个乘法器,每个乘法器与一个或多个正交信号相关联。
输入下转换器电路20接收来自基站中的调制器的理想化的参考信号VRF,并由本地振荡器40进行偏置,使得该下转换器电路将输出Vd提供给模数转换器21。该模数转换器(ADC)21将信号Vd转换成数字形式,此后其将被提供给数字预失真处理器200作为一个输入。
反馈下转换器电路26接收来自功率放大器的输出的原始反馈信号VO(t),并将反馈信号Vf提供给反馈模数转换器25,其中该反馈下转换器电路26也由本地振荡器40偏置。模数转换器25的数字输出接着将第二输入(即反馈信号)提供给数字预失真处理器200。数字预失真处理器200(下面将进行更详细地讨论)将数字输出信号Vr提供给数模转换器(DAC)30,该数模转换器30将数字信号转换成模拟形式,其中该转换后的信号在乘法器11中与已调RF信号组合。
如图3中所示,地址数据成形器32I-32Q接收来自模数转换器21I/Q的输入,并设计成产生查找表33I/Q所要求的信号格式。数据成形器32I/Q向查找表33I/Q内的记忆单元(memory unit)写地址,其中查找表向加法器31提供单独的I输出和Q输出。可以认识到查找表33可以实施为一个或多个查找表。由地址成形器32I-32Q提供的地址可以看作查找表密钥或地址。
预失真控制器查找表33I-33Q被设计成记忆单元来存储高功率放大器线性化的预失真信号。表中的预失真信号是基于通过理想信号vd和反馈信号vf的比较所产生的误差以及所提出的自适应算法。表33I-Q中存储的数据可通过随后描述的自适应叠代方式进行更新,并形成反映功率放大器的非线性特性的数字表征(digitally indexed)的数据。
通过比较理想信号VRF(t)与反馈信号VO(t)之间的AM-AM和AM-PM信息,该数字预失真处理器计算由高功率放大器12的非线性传输特性引起的输出信号VO(t)的幅度和相位分量中的误差。
基于通过上述比较所获得的误差信息,该预失真处理器基于美国专利No.6,985,704[附于附录1]中公开的查找表算法,计算并自适应地产生补偿信号,该补偿信号具有与功率放大器12的变换功能相反的特性以预失真由功率放大器12引起的AM-AM和AM-PM失真。
在加法器31和数模转换器30之后,该预失真查找表33I-33Q的输出vP被供给乘法器11,以修正来自调制器10的已调RF信号。乘法器的输出是具有与功率放大器12相反的非线性所需的预失真信号vin(k),以产生对高功率放大器的输入的预补偿。
本领域技术人员将认识到当理想信号vRF和反馈信号VO(t)到达预失真控制器5[图1]、或图2中的处理器200时,两个信号之间可能存在信号差异。两信号之间的时延差异产生时间差,其由每个信号到达处理器200所经历的不同路径引起。该信号时延可以基于电路和部件的参数以及其它环境因素而随机性变化。结果是难于估计、计算和调节在现场应用环境中的这种信号差异。为了克服这个问题,本发明通过使用由前面引用的美国专利No.6,985,704所教导的算法来自适应地调节该时延。
查找表33的使用允许将记忆功能引入本发明的至少一些实施例中。预失真控制器5的查找表是基于将一组输入数据映射到数字输出中、并自适应地更新的存储的补偿原理。基于存储的功能,查找表的每个输出信号实际上与当前和之前传输的信号都有关,并因此具有记忆功能,其不仅补偿功率放大器的非线性,而且避免需要诸如现有技术中通常使用的专用时延补偿电路。具体参见2007年1月29日提交的美国临时专利申请S.N.60/898,312,标题为“Power AmplifierTime-Delay Invariant Predistortion Methods and Apparatus”。
在图4中示出可以实施上述补偿原理的查找表的一个实施例的结构。来自模数转换器21的数据被供给地址成形器32,该地址成形器32继而形成地址并将该地址供给查找表33。同时,在误差产生器23中对来自模数转换器25的反馈信号vfeedback和来自模数转换器21的理想信号videal进行比较,并在乘法器35中使产生的误差信号与数值μ相乘。μ的值通常在0和1之间,并表示收敛因子,根据美国专利No.6,985,704中的教导能更好理解该收敛因子。然后使比例(scaled)误差因子在加法器34中与反馈因子相加并提供回到查找表33。该结果是查找表的输出,其为时延以及功率放大器12的非线性提供补偿。
由于引入记忆的查找表处理,因此不必为信号延迟处理建立另一个专用时延电路。因此,本专利中的记忆的查找表示出两个功能,即高功率放大器的非线性预失真和自适应信号时延的调节。
预失真控制器的查找表是基于存储的补偿原理,其将一组输入数据映射到数字输出中并自适应地更新。基于存储的功能,查找表的每个输出信号实际上与当前和之前的传输信号都有关,并因此在补偿功率放大器的非线性时具有记忆功能[1]。在图4中示出基于补偿原理的查找表的结构。
可以进一步认识到该预失真控制器的性能在某些方面与原始和反馈通道中的模数转换器中的位的数目有关,由此模数转换器中的位的数目越大,预失真控制器的性能越好。同样,预失真控制器的记忆功能也与地址-移位寄存器中位的数目有关,使得在合理尺寸范围内,预失真控制器的性能随着寄存器中的位数目的增加而改进。可以进一步认识到功率放大器可以运行于任何区域内,使得例如可以将它的偏置或静态工作点设置在饱和区或截止区,并对每个区中的运行进行适当调节。可以用进一步认识到预失真控制器的输出信号是随机控制信号而非调制高频信号,而该信号具有与功率放大器的AM-AM和AM-PM失真分量相反的特性。本领域技术人员也将认识到预失真控制器的输出信号不是高频信号,而其频率通常匹配将由无线发射器中的功率放大器传送的信号的带宽。
由查找表执行的记忆功能和存储功能的组合延伸本发明的能力以补偿功率放大器的非线性特性至不依时间变化的方面。查找表的自适应处理的不依时间变化的特征是查找表的寻址布置的重要益处。在一个实施例中,通过包含当前输入信号以及之前N个输入信号的一组N-位矢量数据来实施查找表的寻址。因此,查找表的地址是长度为N的系列输入序列的组合。查找表的地址越长,系统能够适应的时延信息范围越宽(即,系统能够容忍的时延影响的持续时间越长)。
已经详细地描述了本发明,其中包括几个实施例和替换物,本领域技术人员将会认识到存在属于本发明范围内的多种其它替换物和等价物。因此本发明旨在不受上述内容的限制,而是仅由所附权利要求限制。
Claims (7)
1.一种用于使功率放大器的输出线性化的预失真系统,包含:
代表已调RF信号的第一信号,
第一模数A至D转换器,响应于第一信号以用于产生代表第一信号的第一正交信号;
代表功率放大器的非线性特性的反馈信号,
第二模数A至D转换器,响应于反馈信号以用于产生反馈正交信号;
包含至少一个查找表的预失真控制器,该预失真控制器适用于接收所述第一正交信号和所述反馈正交信号,以平方各个正交信号,并产生用于校正所述功率放大器的所述非线性特性的校正因子,以及
组合逻辑电路,其将所述已调RF信号和相应于所述校正因子的信号进行组合,并提供给所述功率放大器以使所述功率放大器的输出线性化,
其中,校正因子等于第一正交信号的平方减去反馈正交信号的平方。
2.根据权利要求1所述的预失真系统,其中所述组合逻辑电路是模拟乘法器。
3.根据权利要求1所述的预失真系统,其中所述预失真控制器包含确定在所述第一信号和所述反馈信号之间的误差的误差逻辑电路。
4.根据权利要求1所述的预失真系统,其中所述预失真控制器进一步包括地址成形器,其响应于所述第一信号以用于产生供给所述至少一个查找表的地址。
5.一种与用于无线应用的功率放大器一起使用的预失真系统,包含:
模拟乘法器,
代表第一输入信号的第一I/Q信号,
代表功率放大器的非线性特性的反馈I/Q信号,
至少一个误差检测器,用于比较所述第一I/Q信号的平方和所述反馈I/Q信号的平方,所述比较是第一I/Q信号的平方减去反馈I/Q信号的平方,
响应于所述第一I/Q信号以用于形成地址的地址成形器,
响应于所述地址和第二输入的至少一个查找表,
至少一个混合器,用于将所述至少一个查找表的输出和所述误差检测器的输出进行组合,所述混合器的输出将所述第二输入提供给所述查找表,
所述查找表的输出形成到所述模拟乘法器的一个输入,所述第一输入信号形成到所述模拟乘法器的第二输入,且所述模拟乘法器的输出将反向匹配的输入提供给所述功率放大器,用于使所述功率放大器的输出线性化。
6.根据权利要求5所述的预失真系统,其中所述至少一个查找表是至少两个查找表。
7.根据权利要求6所述的预失真系统,其中所述至少两个查找表之一存储I数据,而所述至少两个查找表的另一个查找表存储Q数据。
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9031521B2 (en) | 2002-05-01 | 2015-05-12 | Dali Systems Co. Ltd. | System and method for digital memorized predistortion for wireless communication |
Families Citing this family (101)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8380143B2 (en) | 2002-05-01 | 2013-02-19 | Dali Systems Co. Ltd | Power amplifier time-delay invariant predistortion methods and apparatus |
US8064850B2 (en) * | 2002-05-01 | 2011-11-22 | Dali Systems Co., Ltd. | High efficiency linearization power amplifier for wireless communication |
US8811917B2 (en) * | 2002-05-01 | 2014-08-19 | Dali Systems Co. Ltd. | Digital hybrid mode power amplifier system |
US8472897B1 (en) | 2006-12-22 | 2013-06-25 | Dali Systems Co. Ltd. | Power amplifier predistortion methods and apparatus |
AU2005251169B2 (en) * | 2004-05-26 | 2010-07-15 | Zboost, Llc | Wireless repeater for a duplex communication system implementing a protection based on oscillation detection |
US8050649B2 (en) * | 2005-08-30 | 2011-11-01 | Qualcomm Incorporated | Downconversion mixer with IM2 cancellation |
US8411709B1 (en) | 2006-11-27 | 2013-04-02 | Marvell International Ltd. | Use of previously buffered state information to decode in an hybrid automatic repeat request (H-ARQ) transmission mode |
EP2106648B1 (en) | 2006-12-26 | 2018-08-08 | Dali Systems Co., Ltd. | Method and system for baseband predistortion linearization in multi-channel wideband communication systems |
US9026067B2 (en) * | 2007-04-23 | 2015-05-05 | Dali Systems Co. Ltd. | Remotely reconfigurable power amplifier system and method |
CN103997301B (zh) * | 2007-01-26 | 2018-09-28 | 大力系统有限公司 | 功率放大器时间延迟不变的预失真方法和装置 |
US8274332B2 (en) * | 2007-04-23 | 2012-09-25 | Dali Systems Co. Ltd. | N-way Doherty distributed power amplifier with power tracking |
CN102089966B (zh) * | 2007-04-23 | 2016-02-03 | 大力系统有限公司 | N路doherty分布式功率放大器 |
US8224266B2 (en) * | 2007-08-30 | 2012-07-17 | Dali Systems Co., Ltd. | Power amplifier predistortion methods and apparatus using envelope and phase detector |
US8897393B1 (en) | 2007-10-16 | 2014-11-25 | Marvell International Ltd. | Protected codebook selection at receiver for transmit beamforming |
US8542725B1 (en) | 2007-11-14 | 2013-09-24 | Marvell International Ltd. | Decision feedback equalization for signals having unequally distributed patterns |
WO2009109808A2 (en) | 2007-12-07 | 2009-09-11 | Dali Systems Co. Ltd. | Baseband-derived rf digital predistortion |
JP5056490B2 (ja) * | 2008-03-10 | 2012-10-24 | 富士通株式会社 | 歪み補償係数更新装置および歪み補償増幅器 |
US8565325B1 (en) | 2008-03-18 | 2013-10-22 | Marvell International Ltd. | Wireless device communication in the 60GHz band |
US9541609B2 (en) * | 2008-07-11 | 2017-01-10 | Koninklijke Philips Electronics N.V. | Digital amplifier with feedforward and feedback control |
US8498342B1 (en) | 2008-07-29 | 2013-07-30 | Marvell International Ltd. | Deblocking filtering |
US8761261B1 (en) | 2008-07-29 | 2014-06-24 | Marvell International Ltd. | Encoding using motion vectors |
JP5126364B2 (ja) * | 2008-08-05 | 2013-01-23 | 富士通株式会社 | 送信装置および調整値測定方法 |
US8384476B2 (en) * | 2008-08-11 | 2013-02-26 | Qualcomm, Incorporated | Adaptive digital predistortion of complex modulated waveform using peak and RMS voltage feedback from the output of a power amplifier |
US8345533B1 (en) | 2008-08-18 | 2013-01-01 | Marvell International Ltd. | Frame synchronization techniques |
US8681893B1 (en) | 2008-10-08 | 2014-03-25 | Marvell International Ltd. | Generating pulses using a look-up table |
US8462881B2 (en) * | 2008-12-31 | 2013-06-11 | Ubidyne, Inc. | Method for digitally predistorting a payload signal and radio station incorporating the method |
EP2204903B1 (en) * | 2008-12-31 | 2012-07-18 | Ubidyne Inc. | A radio station and active antenna array |
US8520771B1 (en) | 2009-04-29 | 2013-08-27 | Marvell International Ltd. | WCDMA modulation |
US8670501B2 (en) * | 2009-12-09 | 2014-03-11 | Texas Instruments Incorporated | Digital pre-distortion of non-linear systems with reduced bandwidth feedback |
US8351877B2 (en) | 2010-12-21 | 2013-01-08 | Dali Systems Co. Ltfd. | Multi-band wideband power amplifier digital predistorition system and method |
CN102939716B (zh) * | 2009-12-21 | 2016-02-03 | 大力系统有限公司 | 多频带宽带功率放大器数字预失真系统和方法 |
CN101800546B (zh) * | 2010-02-09 | 2014-07-02 | 中兴通讯股份有限公司 | 一种改善数字预失真系统链路失真过补偿的方法和装置 |
US20110235734A1 (en) * | 2010-03-26 | 2011-09-29 | Peter Kenington | Active antenna array having a single dpd lineariser and a method for predistortion of radio signals |
US20110235749A1 (en) * | 2010-03-26 | 2011-09-29 | Peter Kenington | Active antenna array having analogue transmitter linearisation and a method for predistortion of radio signals |
US20110235748A1 (en) * | 2010-03-26 | 2011-09-29 | Peter Kenington | Active antenna array having analogue transmitter linearisation and a method for predistortion of radio signals |
US8817771B1 (en) | 2010-07-16 | 2014-08-26 | Marvell International Ltd. | Method and apparatus for detecting a boundary of a data frame in a communication network |
CN107682021B (zh) | 2010-08-17 | 2020-02-18 | 大力系统有限公司 | 远程地可重新配置的远程无线电头单元 |
CN105141513B (zh) | 2010-09-14 | 2018-12-14 | 大力系统有限公司 | 操作分布式天线系统的方法和在该系统中进行通信的方法 |
US9431975B2 (en) | 2011-04-04 | 2016-08-30 | The Trustees Of Columbia University In The City Of New York | Circuits for providing class-E power amplifiers |
US9621286B2 (en) * | 2011-06-29 | 2017-04-11 | Tektronix, Inc. | Apparatus for generation of corrected vector wideband RF signals |
US8878615B2 (en) | 2011-10-09 | 2014-11-04 | Institute of Microelectronics, Chinese Academy of Sciences | Voltage-controlled oscillator device and method of correcting voltage-controlled oscillator |
US8805304B2 (en) * | 2011-10-25 | 2014-08-12 | Scintera Networks Llc | Linearization of broadband power amplifiers |
US9362876B2 (en) | 2011-12-22 | 2016-06-07 | Southern Methodist University | Look-up table digital predistortion technique for high-voltage power amplifiers in ultrasonic applications |
EP2789107B1 (en) | 2012-08-09 | 2017-02-15 | Axell Wireless Ltd. | A digital capacity centric distributed antenna system |
CN105103513A (zh) | 2012-11-26 | 2015-11-25 | Adc电信股份有限公司 | 数字射频传输架构的时隙映射和/或聚合元件 |
EP2923473B1 (en) | 2012-11-26 | 2017-08-09 | ADC Telecommunications, Inc. | Forward-path digital summation in digital radio frequency transport |
KR102131909B1 (ko) | 2012-11-26 | 2020-07-08 | 콤스코프 테크놀로지스 엘엘씨 | 플렉시블한 재구성가능 멀티포인트-투-멀티포인트 디지털 라디오 주파수 전달 아키텍쳐 |
WO2014086008A1 (zh) | 2012-12-05 | 2014-06-12 | 华为技术有限公司 | 一种数据处理的方法及装置 |
US9680423B2 (en) * | 2013-03-13 | 2017-06-13 | Analog Devices Global | Under-sampling digital pre-distortion architecture |
US9276617B2 (en) | 2013-03-15 | 2016-03-01 | Analog Devices, Inc. | Radio frequency domain digital pre-distortion |
US8948301B2 (en) * | 2013-05-24 | 2015-02-03 | Telefonaktiebolaget L M Ericsson (Publ) | Multi-band radio-frequency digital predistortion |
US10056924B2 (en) | 2013-08-19 | 2018-08-21 | Analog Devices, Inc. | High output power digital-to-analog converter system |
US8970418B1 (en) | 2013-08-19 | 2015-03-03 | Analog Devices, Inc. | High output power digital-to-analog converter system |
US9787457B2 (en) | 2013-10-07 | 2017-10-10 | Commscope Technologies Llc | Systems and methods for integrating asynchronous signals in distributed antenna system with direct digital interface to base station |
US9750082B2 (en) | 2013-10-07 | 2017-08-29 | Commscope Technologies Llc | Systems and methods for noise floor optimization in distributed antenna system with direct digital interface to base station |
CN103715595B (zh) * | 2013-12-16 | 2018-12-21 | 中国科学院福建物质结构研究所 | 一种khz单纵模脉冲激光器反馈控制电路 |
CA2882910A1 (en) * | 2014-02-25 | 2015-08-25 | Fadhel M. Ghannouchi | System and method for enhanced transmitter efficiency |
US10063197B2 (en) | 2014-03-05 | 2018-08-28 | The Trustees Of Columbia University In The City Of New York | Circuits for power-combined power amplifier arrays |
WO2015177757A1 (en) * | 2014-05-23 | 2015-11-26 | Teko Telecom S.R.L. | Power amplification system for radiofrequency communications |
US9739844B2 (en) * | 2014-07-25 | 2017-08-22 | Qualcomm Incorporated | Guidance and alignment system and methods for electric vehicle wireless charging systems |
WO2016029190A1 (en) * | 2014-08-22 | 2016-02-25 | Lockheed Martin Corporation | Multi-stage linearizer |
US10075310B2 (en) * | 2014-08-28 | 2018-09-11 | Lockheed Martin Corporation | Adaptive linearizer |
US10396917B2 (en) | 2014-09-23 | 2019-08-27 | Axell Wireless Ltd. | Automatic mapping and handling PIM and other uplink interferences in digital distributed antenna systems |
US9614541B2 (en) | 2014-10-01 | 2017-04-04 | The Trustees Of Columbia University In The City Of New York | Wireless-transmitter circuits including power digital-to-amplitude converters |
US20180007696A1 (en) | 2014-12-23 | 2018-01-04 | Axell Wireless Ltd. | Harmonizing noise aggregation and noise management in distributed antenna system |
WO2016127028A1 (en) | 2015-02-05 | 2016-08-11 | Commscope Technologies Llc | Systems and methods for emulating uplink diversity signals |
WO2016187055A1 (en) * | 2015-05-15 | 2016-11-24 | Crocus Technology Inc. | Mram-based pre-distortion linearization and amplification circuits |
US9712343B2 (en) | 2015-06-19 | 2017-07-18 | Andrew Wireless Systems Gmbh | Scalable telecommunications system |
US9590668B1 (en) | 2015-11-30 | 2017-03-07 | NanoSemi Technologies | Digital compensator |
US10110651B2 (en) * | 2016-04-28 | 2018-10-23 | Facebook, Inc. | Video icons |
US9762302B1 (en) * | 2016-06-01 | 2017-09-12 | Maxlinear Asia Singapore PTE LTD | Predistortion for hybrid digital/analog precoders |
US9813190B1 (en) * | 2016-07-01 | 2017-11-07 | Intel IP Corporation | Pre-distortion calibration |
CN109314492B (zh) | 2016-07-08 | 2020-10-09 | 华为技术有限公司 | 数字预失真处理装置 |
US10812166B2 (en) | 2016-10-07 | 2020-10-20 | Nanosemi, Inc. | Beam steering digital predistortion |
CN110574288A (zh) | 2017-02-25 | 2019-12-13 | 纳诺塞米有限公司 | 多频带数字预失真器 |
WO2018157321A1 (zh) * | 2017-02-28 | 2018-09-07 | 华为技术有限公司 | 发射机及数字预失真校准方法 |
US10141961B1 (en) | 2017-05-18 | 2018-11-27 | Nanosemi, Inc. | Passive intermodulation cancellation |
US10581470B2 (en) | 2017-06-09 | 2020-03-03 | Nanosemi, Inc. | Linearization system |
US11115067B2 (en) | 2017-06-09 | 2021-09-07 | Nanosemi, Inc. | Multi-band linearization system |
US10931318B2 (en) * | 2017-06-09 | 2021-02-23 | Nanosemi, Inc. | Subsampled linearization system |
US11323188B2 (en) | 2017-07-12 | 2022-05-03 | Nanosemi, Inc. | Monitoring systems and methods for radios implemented with digital predistortion |
CN107450417B (zh) * | 2017-09-21 | 2023-04-25 | 广东电网有限责任公司电力科学研究院 | 一种非线性信号发生方法及非线性信号发生器 |
WO2019070573A1 (en) | 2017-10-02 | 2019-04-11 | Nanosemi, Inc. | DIGITAL PREDISTORSION ADJUSTMENT BASED ON DETERMINATION OF CHARGE CHARACTERISTICS |
CN111788772B (zh) * | 2017-12-14 | 2024-05-28 | 瑞典爱立信有限公司 | 非线性放大器的线性化 |
US10644657B1 (en) | 2018-05-11 | 2020-05-05 | Nanosemi, Inc. | Multi-band digital compensator for a non-linear system |
US10523159B2 (en) | 2018-05-11 | 2019-12-31 | Nanosemi, Inc. | Digital compensator for a non-linear system |
US10432240B1 (en) * | 2018-05-22 | 2019-10-01 | Micron Technology, Inc. | Wireless devices and systems including examples of compensating power amplifier noise |
US11863210B2 (en) | 2018-05-25 | 2024-01-02 | Nanosemi, Inc. | Linearization with level tracking |
US10931238B2 (en) | 2018-05-25 | 2021-02-23 | Nanosemi, Inc. | Linearization with envelope tracking or average power tracking |
JP2021524692A (ja) | 2018-05-25 | 2021-09-13 | ナノセミ, インク.Nanosemi, Inc. | 様々な動作条件におけるデジタルプレディストーション |
TWI696344B (zh) * | 2018-11-16 | 2020-06-11 | 財團法人工業技術研究院 | 線性度改善系統及線性度改善方法 |
US11018633B2 (en) * | 2019-04-18 | 2021-05-25 | Samsung Electronics Co., Ltd | Method and apparatus for calibrating digital pre-distortion of cellular transmitter |
US10763905B1 (en) | 2019-06-07 | 2020-09-01 | Micron Technology, Inc. | Wireless devices and systems including examples of mismatch correction scheme |
US10887079B1 (en) | 2019-09-26 | 2021-01-05 | Corning Research & Development Corporation | Digital predistortion (DPD) timing alignment in a remote unit(s) for a wireless communications system (WCS) |
US11329687B2 (en) * | 2020-01-20 | 2022-05-10 | Texas Instruments Incorporated | Transceiver circuit with digital pre-distortion (DPD) options |
WO2021092633A2 (en) * | 2020-03-18 | 2021-05-14 | Zeku, Inc. | Apparatus and method of harmonic interference cancellation |
US10972139B1 (en) | 2020-04-15 | 2021-04-06 | Micron Technology, Inc. | Wireless devices and systems including examples of compensating power amplifier noise with neural networks or recurrent neural networks |
US10992326B1 (en) | 2020-05-19 | 2021-04-27 | Nanosemi, Inc. | Buffer management for adaptive digital predistortion |
US11190230B1 (en) | 2020-05-29 | 2021-11-30 | Corning Research & Development Corporation | Wide bandwidth digital pre-distortion (DPD) in a remote unit(s) for a wireless communications system (WCS) |
US11496341B2 (en) | 2020-08-13 | 2022-11-08 | Micron Technology, Inc. | Wireless devices and systems including examples of compensating I/Q imbalance with neural networks or recurrent neural networks |
CN113285727B (zh) * | 2021-06-02 | 2022-07-22 | 恒玄科技(北京)有限公司 | 一种无线信号的发射装置及其处理方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6314142B1 (en) * | 1996-06-19 | 2001-11-06 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Pre-distortion for a non-linear transmission path in the high frequency range |
CN1384996A (zh) * | 1999-10-26 | 2002-12-11 | 艾利森电话股份有限公司 | 功率放大器的自适应线性化 |
Family Cites Families (143)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4700151A (en) | 1985-03-20 | 1987-10-13 | Nec Corporation | Modulation system capable of improving a transmission system |
US4638248A (en) | 1985-06-10 | 1987-01-20 | Massachusetts Institute Of Technology | Methods and apparatus for measuring relative gain and phase of voltage input signals versus voltage output signals |
GB2204202B (en) | 1987-04-28 | 1991-11-27 | Racal Communications Equip | Radio transmitters |
US5121412A (en) | 1989-01-03 | 1992-06-09 | Motorola, Inc. | All-digital quadrature modulator |
US4929906A (en) | 1989-01-23 | 1990-05-29 | The Boeing Company | Amplifier linearization using down/up conversion |
FR2642243B1 (fr) | 1989-01-24 | 1991-04-19 | Labo Electronique Physique | Circuit de predistorsion adaptative |
US5132639A (en) | 1989-09-07 | 1992-07-21 | Ortel Corporation | Predistorter for linearization of electronic and optical signals |
FR2652965A1 (fr) | 1989-10-06 | 1991-04-12 | Philips Electronique Lab | Dispositif de predistorsion pour systeme de transmission numerique. |
US5049832A (en) | 1990-04-20 | 1991-09-17 | Simon Fraser University | Amplifier linearization by adaptive predistortion |
US5678198A (en) | 1991-05-22 | 1997-10-14 | Southwestern Bell Technology Resources, Inc. | System for controlling signal level at both ends of a transmission link, based upon a detected value |
JP2883260B2 (ja) | 1993-04-20 | 1999-04-19 | 三菱電機株式会社 | 歪補償回路 |
US5452473A (en) | 1994-02-28 | 1995-09-19 | Qualcomm Incorporated | Reverse link, transmit power correction and limitation in a radiotelephone system |
US5579342A (en) | 1994-09-22 | 1996-11-26 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Communications | Pre-compensated frequency modulation (PFM) |
US5486789A (en) | 1995-02-28 | 1996-01-23 | Motorola, Inc. | Apparatus and method for providing a baseband digital error signal in an adaptive predistorter |
JP2967699B2 (ja) | 1995-03-06 | 1999-10-25 | 日本電気株式会社 | 送信装置 |
FI98014C (fi) * | 1995-06-30 | 1997-03-25 | Nokia Mobile Phones Ltd | Kuutiointipiiri signaalin esisäröyttämiseksi |
US5870668A (en) | 1995-08-18 | 1999-02-09 | Fujitsu Limited | Amplifier having distortion compensation and base station for radio communication using the same |
US6356555B1 (en) | 1995-08-25 | 2002-03-12 | Terayon Communications Systems, Inc. | Apparatus and method for digital data transmission using orthogonal codes |
US5903823A (en) | 1995-09-19 | 1999-05-11 | Fujitsu Limited | Radio apparatus with distortion compensating function |
US5589797A (en) | 1995-09-26 | 1996-12-31 | Lucent Technologies Inc. | Low distortion amplifier |
US5675287A (en) | 1996-02-12 | 1997-10-07 | Motorola, Inc. | Digital DC correction circuit for a linear transmitter |
US5732333A (en) | 1996-02-14 | 1998-03-24 | Glenayre Electronics, Inc. | Linear transmitter using predistortion |
US5937011A (en) | 1996-03-26 | 1999-08-10 | Airnet Communications Corp. | Multi-carrier high power amplifier using digital pre-distortion |
US5740520A (en) | 1996-04-03 | 1998-04-14 | State Of Israel | Channel correction transceiver |
US5757229A (en) | 1996-06-28 | 1998-05-26 | Motorola, Inc. | Bias circuit for a power amplifier |
US6055418A (en) | 1996-07-05 | 2000-04-25 | Thomcast Communications, Inc. | Computer program product configured to control modular transmission system components |
US5898338A (en) | 1996-09-20 | 1999-04-27 | Spectrian | Adaptive digital predistortion linearization and feed-forward correction of RF power amplifier |
US5920808A (en) | 1996-12-12 | 1999-07-06 | Glenayre Electronics, Inc. | Method and apparatus for reducing key-up distortion by pre-heating transistors |
US6246865B1 (en) | 1997-02-04 | 2001-06-12 | Samsung Electronics Co., Ltd. | Device and method for controlling distortion characteristic of predistorter |
US5923712A (en) | 1997-05-05 | 1999-07-13 | Glenayre Electronics, Inc. | Method and apparatus for linear transmission by direct inverse modeling |
KR100307665B1 (ko) | 1997-05-23 | 2001-10-19 | 하재홍 | 전자정보키시스템 |
KR100251561B1 (ko) * | 1997-06-19 | 2000-04-15 | 윤종용 | 디지털통신시스템의송신기선형화장치및방법 |
US6081158A (en) | 1997-06-30 | 2000-06-27 | Harris Corporation | Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system |
US6639050B1 (en) | 1997-07-21 | 2003-10-28 | Ohio University | Synthetic genes for plant gums and other hydroxyproline-rich glycoproteins |
US6252461B1 (en) | 1997-08-25 | 2001-06-26 | Frederick Herbert Raab | Technique for wideband operation of power amplifiers |
US5959499A (en) | 1997-09-30 | 1999-09-28 | Motorola, Inc. | Predistortion system and method using analog feedback loop for look-up table training |
US5936464A (en) | 1997-11-03 | 1999-08-10 | Motorola, Inc. | Method and apparatus for reducing distortion in a high efficiency power amplifier |
JP3171157B2 (ja) | 1997-12-10 | 2001-05-28 | 松下電器産業株式会社 | 非線形歪補償装置 |
US5963549A (en) | 1997-12-10 | 1999-10-05 | L-3 Communications Corporation | Fixed wireless loop system having baseband combiner predistortion summing table |
US6252912B1 (en) | 1997-12-24 | 2001-06-26 | General Dynamics Government Systems Corporation | Adaptive predistortion system |
US5959500A (en) | 1998-01-26 | 1999-09-28 | Glenayre Electronics, Inc. | Model-based adaptive feedforward amplifier linearizer |
US6300956B1 (en) * | 1998-03-17 | 2001-10-09 | Pixar Animation | Stochastic level of detail in computer animation |
FI105506B (fi) | 1998-04-30 | 2000-08-31 | Nokia Networks Oy | Vahvistimen linearisointimenetelmä ja vahvistinjärjestely |
GB9811381D0 (en) | 1998-05-27 | 1998-07-22 | Nokia Mobile Phones Ltd | Predistortion control for power reduction |
US6054896A (en) | 1998-12-17 | 2000-04-25 | Datum Telegraphic Inc. | Controller and associated methods for a linc linear power amplifier |
US6600792B2 (en) | 1998-06-26 | 2003-07-29 | Qualcomm Incorporated | Predistortion technique for high power amplifiers |
KR100326176B1 (ko) * | 1998-08-06 | 2002-04-17 | 윤종용 | 이동통신시스템의전력증폭장치및방법 |
US6301579B1 (en) * | 1998-10-20 | 2001-10-09 | Silicon Graphics, Inc. | Method, system, and computer program product for visualizing a data structure |
US6275685B1 (en) | 1998-12-10 | 2001-08-14 | Nortel Networks Limited | Linear amplifier arrangement |
US6236267B1 (en) | 1998-12-29 | 2001-05-22 | International Business Machines Corporation | Linearization for power amplifiers using feed-forward and feedback control |
US6614854B1 (en) | 1999-05-28 | 2003-09-02 | Carriercomm, Inc. | System and method for adaptive predistortion |
IT1313906B1 (it) | 1999-06-15 | 2002-09-26 | Cit Alcatel | Precorrezione digitale adattiva di non-linearita' introdotte daamplicatori di potenza. |
GB2351624B (en) | 1999-06-30 | 2003-12-03 | Wireless Systems Int Ltd | Reducing distortion of signals |
JP2001016116A (ja) | 1999-07-02 | 2001-01-19 | Nec Corp | 携帯無線機 |
US6356146B1 (en) | 1999-07-13 | 2002-03-12 | Pmc-Sierra, Inc. | Amplifier measurement and modeling processes for use in generating predistortion parameters |
US6587514B1 (en) | 1999-07-13 | 2003-07-01 | Pmc-Sierra, Inc. | Digital predistortion methods for wideband amplifiers |
US6697436B1 (en) | 1999-07-13 | 2004-02-24 | Pmc-Sierra, Inc. | Transmission antenna array system with predistortion |
US6731904B1 (en) * | 1999-07-20 | 2004-05-04 | Andrew Corporation | Side-to-side repeater |
JP3381689B2 (ja) | 1999-11-30 | 2003-03-04 | 日本電気株式会社 | 非線形歪み補償回路及びそれを用いた送信装置並びに移動通信機 |
JP4183364B2 (ja) * | 1999-12-28 | 2008-11-19 | 富士通株式会社 | 歪補償装置 |
US6751447B1 (en) | 1999-12-30 | 2004-06-15 | Samsung Electronics Cop., Ltd. | Adaptive digital pre-distortion circuit using output reference signal and method of operation |
US6242979B1 (en) | 2000-02-23 | 2001-06-05 | Motorola, Inc. | Linearization using parallel cancellation in linear power amplifier |
GB2359679B (en) | 2000-02-24 | 2004-03-10 | Wireless Systems Int Ltd | Amplifier |
GB0011326D0 (en) | 2000-05-11 | 2000-06-28 | Nortel Networks Corp | A linear amplifier arrangement |
US6489846B2 (en) | 2000-05-25 | 2002-12-03 | Sony Corporation | Distortion compensating device and distortion compensating method |
JP4326673B2 (ja) * | 2000-06-06 | 2009-09-09 | 富士通株式会社 | 非線形歪補償装置を有する通信装置の起動方法 |
JP2002009557A (ja) | 2000-06-21 | 2002-01-11 | Matsushita Electric Ind Co Ltd | 線形補償増幅装置 |
US6898252B1 (en) | 2000-07-21 | 2005-05-24 | Intel Corporation | IQ mismatch cancellation |
JP3590571B2 (ja) | 2000-08-30 | 2004-11-17 | 株式会社日立国際電気 | 歪補償装置 |
KR100374828B1 (ko) * | 2000-09-15 | 2003-03-04 | 엘지전자 주식회사 | 적응성 전치왜곡 송신기 |
US20020179830A1 (en) | 2000-11-01 | 2002-12-05 | Pearson Robert M. | Halbach Dipole magnet shim system |
US6424225B1 (en) | 2000-11-27 | 2002-07-23 | Conexant Systems, Inc. | Power amplifier circuit for providing constant bias current over a wide temperature range |
KR20020054149A (ko) | 2000-12-27 | 2002-07-06 | 엘지전자 주식회사 | 디지털 전치왜곡기를 갖는 기지국 송신장치 |
JP3690988B2 (ja) | 2001-02-01 | 2005-08-31 | 株式会社日立国際電気 | プリディストーション歪み補償装置 |
KR100398664B1 (ko) | 2001-02-21 | 2003-09-19 | 주식회사 쏠리테크 | 중간주파수 대역 사전왜곡에 의한 전력 증폭기 선형화 장치 |
US6983025B2 (en) | 2001-04-11 | 2006-01-03 | Tropian, Inc. | High quality power ramping in a communications transmitter |
BR0210131A (pt) | 2001-05-31 | 2004-06-08 | Magnolia Broadband Inc | Dispositivo de comunicação com antena inteligente usando um sinal de indicação de qualidade |
US6928122B2 (en) | 2001-06-07 | 2005-08-09 | Motorola, Inc. | Amplifier predistortion system and method |
US6903604B2 (en) | 2001-06-07 | 2005-06-07 | Lucent Technologies Inc. | Method and apparatus for modeling and estimating the characteristics of a power amplifier |
US7035345B2 (en) | 2001-06-08 | 2006-04-25 | Polyvalor S.E.C. | Adaptive predistortion device and method using digital receiver |
GB2376583B (en) | 2001-06-15 | 2005-01-05 | Wireless Systems Int Ltd | Time alignment of signals |
US7068984B2 (en) | 2001-06-15 | 2006-06-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Systems and methods for amplification of a communication signal |
US7203247B2 (en) | 2001-07-23 | 2007-04-10 | Agere Systems Inc. | Digital predistortion technique for WCDMA wireless communication system and method of operation thereof |
US7158765B2 (en) | 2001-07-31 | 2007-01-02 | Agere Systems, Inc. | Method and apparatus for controlling power of a transmitted signal |
US20030058959A1 (en) | 2001-09-25 | 2003-03-27 | Caly Networks. | Combined digital adaptive pre-distorter and pre-equalizer system for modems in link hopping radio networks |
US7109998B2 (en) * | 2001-10-03 | 2006-09-19 | Sun Microsystems, Inc. | Stationary semantic zooming |
US7103329B1 (en) | 2001-10-25 | 2006-09-05 | Rockwell Collins, Inc. | Adaptive feedback channel for radio frequency power amplifiers |
US7058139B2 (en) | 2001-11-16 | 2006-06-06 | Koninklijke Philips Electronics N.V. | Transmitter with transmitter chain phase adjustment on the basis of pre-stored phase information |
US6657510B2 (en) * | 2001-11-27 | 2003-12-02 | Harris Corporation | Corrective phase quadrature modulator system and method |
US6703897B2 (en) | 2001-12-26 | 2004-03-09 | Nortel Networks Limited | Methods of optimising power amplifier efficiency and closed-loop power amplifier controllers |
US6993302B2 (en) | 2002-01-15 | 2006-01-31 | Igor Bausov | Class-L power-output amplifier |
US7079818B2 (en) | 2002-02-12 | 2006-07-18 | Broadcom Corporation | Programmable mutlistage amplifier and radio applications thereof |
KR100553252B1 (ko) | 2002-02-01 | 2006-02-20 | 아바고테크놀로지스코리아 주식회사 | 휴대용 단말기의 전력 증폭 장치 |
US7248642B1 (en) * | 2002-02-05 | 2007-07-24 | Andrew Corporation | Frequency-dependent phase pre-distortion for reducing spurious emissions in communication networks |
US6747649B1 (en) * | 2002-03-19 | 2004-06-08 | Aechelon Technology, Inc. | Terrain rendering in a three-dimensional environment |
US6983026B2 (en) | 2002-03-19 | 2006-01-03 | Motorola, Inc. | Method and apparatus using base band transformation to improve transmitter performance |
US20030179830A1 (en) | 2002-03-25 | 2003-09-25 | Eidson Donald B. | Efficient, high fidelity transmission of modulation schemes through power-constrained remote relay stations by local transmit predistortion and local receiver feedback |
CA2457404C (en) | 2002-03-26 | 2010-07-13 | Her Majesty In Right Of Canada As Represented By The Minister Of Indusy | Type-based baseband predistorter function estimation technique for non-linear circuits |
US6985704B2 (en) | 2002-05-01 | 2006-01-10 | Dali Yang | System and method for digital memorized predistortion for wireless communication |
US8064850B2 (en) | 2002-05-01 | 2011-11-22 | Dali Systems Co., Ltd. | High efficiency linearization power amplifier for wireless communication |
US8380143B2 (en) | 2002-05-01 | 2013-02-19 | Dali Systems Co. Ltd | Power amplifier time-delay invariant predistortion methods and apparatus |
US8472897B1 (en) | 2006-12-22 | 2013-06-25 | Dali Systems Co. Ltd. | Power amplifier predistortion methods and apparatus |
JP4077449B2 (ja) | 2002-05-31 | 2008-04-16 | 富士通株式会社 | テーブル参照型プリディストータ |
US7113551B2 (en) | 2002-07-25 | 2006-09-26 | Intersil Corporation | Transmitter with limited spectral regrowth and method therefor |
US7321635B2 (en) | 2002-08-16 | 2008-01-22 | Andrew Corporation | Linearization of amplifiers using baseband detection and non-baseband pre-distortion |
US7151913B2 (en) | 2003-06-30 | 2006-12-19 | M/A-Com, Inc. | Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture |
WO2004040870A1 (fr) * | 2002-10-31 | 2004-05-13 | Zte Corporation | Procede et systeme de linearisation par distorsion prealable de bande passante |
US20040142667A1 (en) | 2003-01-21 | 2004-07-22 | Lochhead Donald Laird | Method of correcting distortion in a power amplifier |
US7295819B2 (en) * | 2003-03-11 | 2007-11-13 | Andrew Corporation | Signal sample acquisition techniques |
US7123890B2 (en) * | 2003-03-11 | 2006-10-17 | Andrew Corporation | Signal sample acquisition techniques |
US6922102B2 (en) | 2003-03-28 | 2005-07-26 | Andrew Corporation | High efficiency amplifier |
US7038539B2 (en) | 2003-05-06 | 2006-05-02 | Powerwave Technologies, Inc. | RF amplifier employing active load linearization |
US7068101B2 (en) | 2003-07-03 | 2006-06-27 | Icefyre Semiconductor Corporation | Adaptive predistortion for a transmit system |
US7042287B2 (en) | 2003-07-23 | 2006-05-09 | Northrop Grumman Corporation | System and method for reducing dynamic range and improving linearity in an amplication system |
US7259630B2 (en) | 2003-07-23 | 2007-08-21 | Andrew Corporation | Elimination of peak clipping and improved efficiency for RF power amplifiers with a predistorter |
US6963242B2 (en) | 2003-07-31 | 2005-11-08 | Andrew Corporation | Predistorter for phase modulated signals with low peak to average ratios |
US7109792B2 (en) | 2003-09-17 | 2006-09-19 | Andrew Corporation | Table-based pre-distortion for amplifier systems |
JP4394409B2 (ja) | 2003-09-25 | 2010-01-06 | 株式会社日立国際電気 | プリディストーション方式歪補償機能付き増幅器 |
US7372918B2 (en) | 2003-09-30 | 2008-05-13 | Infineon Technologies Ag | Transmission device with adaptive digital predistortion, transceiver with transmission device, and method for operating a transmission device |
US7023273B2 (en) | 2003-10-06 | 2006-04-04 | Andrew Corporation | Architecture and implementation methods of digital predistortion circuitry |
US7071777B2 (en) | 2003-12-02 | 2006-07-04 | Motorola, Inc. | Digital memory-based predistortion technique |
US7469491B2 (en) | 2004-01-27 | 2008-12-30 | Crestcom, Inc. | Transmitter predistortion circuit and method therefor |
JP4467319B2 (ja) | 2004-01-29 | 2010-05-26 | 株式会社日立国際電気 | プリディストータ |
US6998909B1 (en) | 2004-02-17 | 2006-02-14 | Altera Corporation | Method to compensate for memory effect in lookup table based digital predistorters |
JP4520204B2 (ja) | 2004-04-14 | 2010-08-04 | 三菱電機株式会社 | 高周波電力増幅器 |
US7102442B2 (en) | 2004-04-28 | 2006-09-05 | Sony Ericsson Mobile Communications Ab | Wireless terminals, methods and computer program products with transmit power amplifier input power regulation |
KR101126401B1 (ko) * | 2004-05-11 | 2012-03-29 | 삼성전자주식회사 | 전력 증폭기에 디지털 전치 왜곡 장치 및 방법 |
US7676804B2 (en) | 2004-05-20 | 2010-03-09 | Caterpillar Inc. | Systems and method for remotely modifying software on a work machine |
US7113037B2 (en) | 2004-07-14 | 2006-09-26 | Raytheon Company | Performing remote power amplifier linearization |
JP4214098B2 (ja) | 2004-09-09 | 2009-01-28 | 株式会社ルネサステクノロジ | シグマデルタ送信回路及びそれを用いた送受信機 |
US7463697B2 (en) | 2004-09-28 | 2008-12-09 | Intel Corporation | Multicarrier transmitter and methods for generating multicarrier communication signals with power amplifier predistortion and linearization |
US7104310B2 (en) | 2004-12-27 | 2006-09-12 | Hunter Automated Machinery Corporation | Mold making machine with separated safety work zones |
US7193462B2 (en) * | 2005-03-22 | 2007-03-20 | Powerwave Technologies, Inc. | RF power amplifier system employing an analog predistortion module using zero crossings |
DE102005013881A1 (de) * | 2005-03-24 | 2006-09-28 | Infineon Technologies Ag | Verfahren zur Signalverarbeitung und Sendeeinrichtung mit digitaler Vorverzerrung, insbesondere für den Mobilfunk |
US7499682B2 (en) | 2005-05-24 | 2009-03-03 | Skyworks Solutions, Inc. | Dual voltage regulator for a supply voltage controlled power amplifier in a closed power control loop |
US20070075780A1 (en) | 2005-10-05 | 2007-04-05 | Enver Krvavac | Apparatus and method for adaptive biasing of a Doherty amplifier |
US7831221B2 (en) | 2005-12-13 | 2010-11-09 | Andrew Llc | Predistortion system and amplifier for addressing group delay modulation |
US7626591B2 (en) * | 2006-01-24 | 2009-12-01 | D & S Consultants, Inc. | System and method for asynchronous continuous-level-of-detail texture mapping for large-scale terrain rendering |
US8195103B2 (en) | 2006-02-15 | 2012-06-05 | Texas Instruments Incorporated | Linearization of a transmit amplifier |
WO2008105775A1 (en) | 2006-04-28 | 2008-09-04 | Dali Systems Co. Ltd | High efficiency linearization power amplifier for wireless communication |
US7733978B2 (en) | 2006-05-26 | 2010-06-08 | Industrial Technology Research Institute | Apparatus and method of dynamically adapting the LUT spacing for linearizing a power amplifier |
WO2008015775A1 (fr) | 2006-07-31 | 2008-02-07 | Techno Polymer Co., Ltd. | Châssis de dissipation thermique et boîtier de dissipation thermique |
CN105141513B (zh) * | 2010-09-14 | 2018-12-14 | 大力系统有限公司 | 操作分布式天线系统的方法和在该系统中进行通信的方法 |
-
2007
- 2007-04-30 US US11/799,239 patent/US8064850B2/en not_active Expired - Lifetime
- 2007-04-30 CN CN2007800238751A patent/CN101479956B/zh active Active
-
2008
- 2008-09-02 US US12/203,064 patent/US8693962B2/en active Active
-
2011
- 2011-11-21 US US13/301,224 patent/US8620234B2/en not_active Expired - Lifetime
-
2013
- 2013-12-03 US US14/095,891 patent/US9054758B2/en not_active Expired - Lifetime
-
2015
- 2015-04-20 US US14/691,152 patent/US9742446B2/en not_active Expired - Lifetime
-
2017
- 2017-08-21 US US15/682,431 patent/US10305521B2/en not_active Expired - Lifetime
-
2019
- 2019-04-18 US US16/388,680 patent/US20200083914A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6314142B1 (en) * | 1996-06-19 | 2001-11-06 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Pre-distortion for a non-linear transmission path in the high frequency range |
CN1384996A (zh) * | 1999-10-26 | 2002-12-11 | 艾利森电话股份有限公司 | 功率放大器的自适应线性化 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9031521B2 (en) | 2002-05-01 | 2015-05-12 | Dali Systems Co. Ltd. | System and method for digital memorized predistortion for wireless communication |
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US20120135695A1 (en) | 2012-05-31 |
US20150333710A1 (en) | 2015-11-19 |
US20070241812A1 (en) | 2007-10-18 |
CN101479956A (zh) | 2009-07-08 |
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US20140179248A1 (en) | 2014-06-26 |
US9054758B2 (en) | 2015-06-09 |
US9742446B2 (en) | 2017-08-22 |
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US8064850B2 (en) | 2011-11-22 |
US20180097530A1 (en) | 2018-04-05 |
US8693962B2 (en) | 2014-04-08 |
US20200083914A1 (en) | 2020-03-12 |
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