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1. 发明申请

US20190181807A1 POWER AMPLIFIER TIME-DELAY INVARIANT PREDISTORTION METHODS AND APPARATUS 审中-公开
公开(公告)号：US20190181807A1
公开(公告)日：2019-06-13
申请号：US16118329
申请日：2018-08-30
申请人： Dali Wireless, Inc.
发明人： Dali Yang , Jia Yang
IPC分类号： H03F1/32 , H04L1/00 , H03F3/24 , H04B1/04
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.

2. 发明授权

US09742446B2 High efficiency linearization power amplifier for wireless communication 有权
公开(公告)号：US09742446B2
公开(公告)日：2017-08-22
申请号：US14691152
申请日：2015-04-20
申请人： Dali Wireless, Inc.
发明人： Dali Yang , Jia Yang
IPC分类号： H03F1/26 , H04B1/04 , H03F3/21 , H03F3/19 , H03F1/32 , H03F3/24
CPC分类号： H04B1/0475 , H03F1/3247 , H03F3/19 , H03F3/21 , H03F3/24 , H03F2200/451 , H03F2200/57 , H03F2201/3215 , H03F2201/3233 , H04B2001/0425 , Y02D70/00
摘要： A predistortion system for linearizing the output of a power amplifier includes a first signal representative of an RF modulated signal and a feedback signal representative of nonlinear characteristics of a power amplifier. The system also includes a predistortion controller, comprising at least one lookup table, adapted to receive the first signal and the feedback signal and to generate a correction factor for correcting the nonlinear characteristics of the power amplifier and combining logic which combines the RF modulated signal with a signal corresponding to the correction factor and supplies it to the power amplifier to linearize the output of the power amplifier.

3. 发明申请

US20150333710A1 HIGH EFFICIENCY LINEARIZATION POWER AMPLIFIER FOR WIRELESS COMMUNICATION 有权
标题翻译：高效率线性化功率放大器，用于无线通信
公开(公告)号：US20150333710A1
公开(公告)日：2015-11-19
申请号：US14691152
申请日：2015-04-20
申请人： Dali Systems Co. Ltd.
发明人： Dali Yang , Jia Yang
IPC分类号： H03F1/32 , H03F3/21 , H03F3/19 , H04B1/04
CPC分类号： H04B1/0475 , H03F1/3247 , H03F3/19 , H03F3/21 , H03F3/24 , H03F2200/451 , H03F2200/57 , H03F2201/3215 , H03F2201/3233 , H04B2001/0425 , Y02D70/00
摘要： A predistortion system for linearizing the output of a power amplifier includes a first signal representative of an RF modulated signal and a feedback signal representative of nonlinear characteristics of a power amplifier. The system also includes a predistortion controller, comprising at least one lookup table, adapted to receive the first signal and the feedback signal and to generate a correction factor for correcting the nonlinear characteristics of the power amplifier and combining logic which combines the RF modulated signal with a signal corresponding to the correction factor and supplies it to the power amplifier to linearize the output of the power amplifier.
摘要翻译：用于线性化功率放大器的输出的预失真系统包括表示RF调制信号的第一信号和表示功率放大器的非线性特性的反馈信号。该系统还包括预失真控制器，包括至少一个查找表，适于接收第一信号和反馈信号，并产生用于校正功率放大器的非线性特性的校正因子，以及将RF调制信号与对应于校正因子的信号并将其提供给功率放大器以使功率放大器的输出线性化。

4. 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.

5. 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。

6. 发明授权

US08942635B2 Method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a single feedback mixer 有权
标题翻译：通过利用具有单个反馈混频器的数字预失真方案来补偿发射机中的估计失真的方法和系统
公开(公告)号：US08942635B2
公开(公告)日：2015-01-27
申请号：US14080898
申请日：2013-11-15
申请人： Broadcom Corporation
发明人： Arya Behzad , Ali Afsahi , Vikram Magoon , Alok Gupta
IPC分类号： H04B1/00 , H03F1/32 , H04L27/36
CPC分类号： H03F1/3247 , H03F1/3294 , H03F2200/336 , H03F2200/57 , H04L27/368
摘要： Aspects of a method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a single feedback mixer are presented. Aspects of the system may include at least one circuit that enables generation of an output signal in response to one or more generated input signals. A feedback signal may be generated within a single feedback mixer circuit that may perform a frequency mix-down operation on the generated output signal. The generated feedback signal may be inserted at one or more insertion points in a receiver. Each of the insertion points may be located between a mixer stage of the receiver, and one or more circuits that generate a baseband signal based on the generated feedback signal.
摘要翻译：提出了通过利用具有单个反馈混频器的数字预失真方案来补偿发射机中的估计失真的方法和系统的方面。该系统的方面可以包括响应于一个或多个所生成的输入信号而能够产生输出信号的至少一个电路。可以在可以对所生成的输出信号执行频率混合运算的单个反馈混频器电路内产生反馈信号。产生的反馈信号可以插入接收器中的一个或多个插入点。每个插入点可以位于接收器的混合器级之间，以及基于产生的反馈信号产生基带信号的一个或多个电路。

7. 发明申请

US20140179248A1 HIGH EFFICIENCY LINEARIZATION POWER AMPLIFIER FOR WIRELESS COMMUNICATION 有权
标题翻译：高效率线性化功率放大器，用于无线通信
公开(公告)号：US20140179248A1
公开(公告)日：2014-06-26
申请号：US14095891
申请日：2013-12-03
申请人： DALI SYSTEMS CO. LTD.
发明人： Dali Yang , Jia Yang
IPC分类号： H04B1/04
CPC分类号： H04B1/0475 , H03F1/3247 , H03F3/19 , H03F3/21 , H03F3/24 , H03F2200/451 , H03F2200/57 , H03F2201/3215 , H03F2201/3233 , H04B2001/0425 , Y02D70/00
摘要： A predistortion system for linearizing the output of a power amplifier includes a first signal representative of an RF modulated signal and a feedback signal representative of nonlinear characteristics of a power amplifier. The system also includes a predistortion controller, comprising at least one lookup table, adapted to receive the first signal and the feedback signal and to generate a correction factor for correcting the nonlinear characteristics of the power amplifier and combining logic which combines the RF modulated signal with a signal corresponding to the correction factor and supplies it to the power amplifier to linearize the output of the power amplifier.
摘要翻译：用于线性化功率放大器的输出的预失真系统包括表示RF调制信号的第一信号和表示功率放大器的非线性特性的反馈信号。该系统还包括预失真控制器，包括至少一个查找表，适于接收第一信号和反馈信号，并产生用于校正功率放大器的非线性特性的校正因子，以及将RF调制信号与对应于校正因子的信号并将其提供给功率放大器以使功率放大器的输出线性化。

8. 发明授权

US08737300B2 Daisy-chained ring of remote units for a distributed antenna system 有权
标题翻译：用于分布式天线系统的远程单元的菊花链环
公开(公告)号：US08737300B2
公开(公告)日：2014-05-27
申请号：US13211247
申请日：2011-08-16
申请人： Shawn Patrick Stapleton , Paul Lemson , Bin Lin , Albert S. Lee
发明人： Shawn Patrick Stapleton , Paul Lemson , Bin Lin , Albert S. Lee
IPC分类号： H04W4/00
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.
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，其是现场可重配置的并且支持多调制方案（与调制无关），多载波，多频带和多信道。更具体地，本发明涉及利用一个或多个远程单元的菊花链的DAS。本发明能够灵活地管理，控制，增强，促进分布式无线网络的使用和性能，例如灵活的模拟广播，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，载频布置，流量监控，流量标签，导频信标等。因此，根据本发明的DAS可以提高运营商的无线网络的效率和流量。

9. 发明授权

US08620234B2 High efficiency linearization power amplifier for wireless communication 有权
公开(公告)号：US08620234B2
公开(公告)日：2013-12-31
申请号：US13301224
申请日：2011-11-21
申请人： Dali Yang , Jia Yang
发明人： Dali Yang , Jia Yang
IPC分类号： H04B1/04
CPC分类号： H04B1/0475 , H03F1/3247 , H03F3/19 , H03F3/21 , H03F3/24 , H03F2200/451 , H03F2200/57 , H03F2201/3215 , H03F2201/3233 , H04B2001/0425 , Y02D70/00
摘要： A predistortion system for linearizing the output of a power amplifier includes a first signal representative of an RF modulated signal and a feedback signal representative of nonlinear characteristics of a power amplifier. The system also includes a predistortion controller, comprising at least one lookup table, adapted to receive the first signal and the feedback signal and to generate a correction factor for correcting the nonlinear characteristics of the power amplifier and combining logic which combines the RF modulated signal with a signal corresponding to the correction factor and supplies it to the power amplifier to linearize the output of the power amplifier.

10. 发明授权

US08548403B2 Baseband-derived RF digital predistortion 有权
公开(公告)号：US08548403B2
公开(公告)日：2013-10-01
申请号：US13776163
申请日：2013-02-25
申请人： Dali Systems Co. Ltd.
发明人： Wan Jong Kim , Shawn Patrick Stapleton
IPC分类号： H04B1/04
CPC分类号： H03F1/3258 , H03F1/3247 , H03F1/3294 , H03F2200/204 , H03F2200/336 , H03F2200/57 , H03F2201/3224 , H03F2201/3233 , H04B1/0475 , H04L25/03038 , H04L25/03343 , H04L2025/03356 , H04L2025/03477
摘要： A baseband-derived RF predistortion system using a lookup table having coefficients extracted at baseband and then applied at RF by means of a vector modulator. The architecture combines the narrowband advantage of envelope predistortion with the accuracy of baseband predistortion, and including compensation for memory effects. A polynomial-based alternative is also described.

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