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    SYSTEM AND METHOD FOR INCREASING BANDWIDTH FOR DIGITAL PREDISTORTION IN MULTI-CHANNEL WIDEBAND COMMUNICATION SYSTEMS
    31.
    发明申请
    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测的带宽的系统和方法

    公开(公告)号：US20140376661A1

    公开(公告)日：2014-12-25

    申请号：US14480267

    申请日：2014-09-08

    Applicant: Dali Systems Co. Ltd.

    Inventor： Wan-Jong Kim ,  Shawn Patrick Stapleton

    IPC: H04B1/04

    CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H03F1/3247 ,  H04B1/0017 ,  H04B2001/0425 ,  H04L27/368

    Abstract: 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.

    Abstract translation: 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。

    System and method for increasing bandwidth for digital predistortion in multi-channel wideband communication systems
    32.
    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：US08873674B2

    公开(公告)日：2014-10-28

    申请号：US13625760

    申请日：2012-09-24

    Applicant: Dali Systems Co. Ltd.

    Inventor： Wan-Jong Kim ,  Shawn Patrick Stapleton

    IPC: H04L25/03 ,  H03F1/32 ,  H04L27/36 ,  H04B1/04

    CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H03F1/3247 ,  H04B1/0017 ,  H04B2001/0425 ,  H04L27/368

    Abstract: 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.

    Abstract translation: 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。

    SOFTWARE CONFIGURABLE DISTRIBUTED ANTENNA SYSTEM AND METHOD FOR BANDWIDTH COMPRESSION AND TRANSPORT OF SIGNALS IN NONCONTIGUOUS FREQUENCY BLOCKS
    33.
    发明申请
    SOFTWARE CONFIGURABLE DISTRIBUTED ANTENNA SYSTEM AND METHOD FOR BANDWIDTH COMPRESSION AND TRANSPORT OF SIGNALS IN NONCONTIGUOUS FREQUENCY BLOCKS 审中-公开
    软件可配置的分布式天线系统和方法用于非线性频率块中信号的带宽压缩和传输

    公开(公告)号：US20140206282A1

    公开(公告)日：2014-07-24

    申请号：US14225673

    申请日：2014-03-26

    Applicant: DALI SYSTEMS CO., LTD.

    Inventor： Shawn Patrick Stapleton ,  Wan-Jong Kim

    IPC: H04B1/50

    CPC classification number: H04L47/38 ,  H04B1/0007 ,  H04B1/40 ,  H04B1/50 ,  H04W72/04

    Abstract: A method for transporting communications signals includes receiving an analog IF signal at a first unit. The analog IF signal includes a first carrier having a first frequency and a first bandwidth and a second carrier having a second frequency different from the first frequency and a second bandwidth. The analog IF signal is converted to a digitally sampled IF signal having the first carrier located in a first Nyquist zone, the second carrier located in a second Nyquist zone, an image of the first carrier located in a third Nyquist zone, and an image of the second carrier located in the third Nyquist zone. The image of the first carrier and the image of the second carrier is transmitted from the first unit to a second unit, where the image of the first carrier and the image of the second carrier is then converted to the analog IF signal.

    Abstract translation: 用于传送通信信号的方法包括在第一单元处接收模拟IF信号。 模拟IF信号包括具有第一频率和第一带宽的第一载波和具有不同于第一频率和第二带宽的第二频率的第二载波。 模拟IF信号被转换成具有第一载波位于第一奈奎斯特区的第二载波的数字采样IF信号，位于第二奈奎斯特区的第二载波，位于第三奈奎斯特区的第一载波的图像， 位于第三奈奎斯特区的第二载体。 第一载波的图像和第二载波的图像从第一单元发送到第二单元，其中第一载波的图像和第二载波的图像然后被转换为模拟IF信号。

    Method and system for link synchronization in an LTE-TDD architecture
    34.
    发明授权
    Method and system for link synchronization in an LTE-TDD architecture 有权

    公开(公告)号：US10863470B2

    公开(公告)日：2020-12-08

    申请号：US16563680

    申请日：2019-09-06

    Applicant: Dali Systems Co. Ltd.

    Inventor： Wan-Jong Kim ,  Shawn Patrick Stapleton

    IPC: H04W56/00 ,  H04L25/03 ,  H04W88/08 ,  H04L27/26 ,  H04B17/318 ,  H04B7/04 ,  H04L5/14 ,  H04L5/00

    Abstract: A method of detecting a synchronization switching pulse using a power detector in a time division duplexing (TDD) system includes receiving an input signal, detecting a power level associated with the input signal using a digital power meter, and determining a configuration associated with the input signal. The method also includes determining that a pulse width associated with the input signal is greater than a threshold, determining an offset associated with a special subframe configuration, and generating an estimated sync pulse. The method further includes forming a regenerated sync pulse, determining an error between the estimated sync pulse and the regenerated sync pulse, determining that the error is less than a threshold, and providing a lock detect.

    METHOD AND SYSTEM FOR LINK SYNCHRONIZATION IN AN LTE-TDD ARCHITECTURE
    36.
    发明申请
    METHOD AND SYSTEM FOR LINK SYNCHRONIZATION IN AN LTE-TDD ARCHITECTURE 审中-公开

    公开(公告)号：US20200137709A1

    公开(公告)日：2020-04-30

    申请号：US16563680

    申请日：2019-09-06

    Applicant: Dali Systems Co. Ltd.

    Inventor： Wan-Jong Kim ,  Shawn Patrick Stapleton

    IPC: H04W56/00 ,  H04B7/04 ,  H04B17/318 ,  H04L25/03 ,  H04L27/26 ,  H04W88/08

    Abstract: A method of detecting a synchronization switching pulse using a power detector in a time division duplexing (TDD) system includes receiving an input signal, detecting a power level associated with the input signal using a digital power meter, and determining a configuration associated with the input signal. The method also includes determining that a pulse width associated with the input signal is greater than a threshold, determining an offset associated with a special subframe configuration, and generating an estimated sync pulse. The method further includes forming a regenerated sync pulse, determining an error between the estimated sync pulse and the regenerated sync pulse, determining that the error is less than a threshold, and providing a lock detect.

    MULTI-BAND WIDE BAND POWER AMPLIFIER DIGITAL PREDISTORTION SYSTEM
    40.
    发明申请
    MULTI-BAND WIDE BAND POWER AMPLIFIER DIGITAL PREDISTORTION SYSTEM 审中-公开
    多带宽功率放大器数字预测系统

    公开(公告)号：US20170047952A1

    公开(公告)日：2017-02-16

    申请号：US15181033

    申请日：2016-06-13

    Applicant: Dali Systems Co. Ltd.

    Inventor： Wan-Jong Kim ,  Kyoung-Joon Cho ,  Shawn Patrick Stapleton

    IPC: H04B1/04 ,  H04L27/26 ,  H04L27/36

    CPC classification number: H04B1/0475 ,  H03F1/3247 ,  H03F2200/111 ,  H03F2200/451 ,  H04B1/62 ,  H04L27/2626 ,  H04L27/368

    Abstract: A high performance and cost effective method of RF-digital hybrid mode power amplifier systems with high linearity and high efficiency for multi-frequency band wideband communication system applications is disclosed. The present disclosure enables a power amplifier system to be field reconfigurable and support multiple operating frequency bands on the same PA system over a very wide bandwidth. In addition, the present invention supports multi-modulation schemes (modulation agnostic), multi-carriers and multi-channels.

    Abstract translation: 公开了一种用于多频带宽带通信系统应用的具有高线性度和高效率的RF数字混合模式功率放大器系统的高性能和成本有效的方法。 本公开使得功率放大器系统能够在现场可重新配置并且在非常宽的带宽上支持相同PA系统上的多个工作频带。 此外，本发明支持多调制方案（调制不可知），多载波和多信道。

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