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    High efficiency, remotely reconfigurable remote radio head unit system and method for wireless communications
    1.
    发明授权
    High efficiency, remotely reconfigurable remote radio head unit system and method for wireless communications 有权
    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

    Applicant: DALI SYSTEMS CO. LTD.

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

    IPC: H04L25/49 ,  H03F1/32 ,  H03F3/68 ,  H04B1/00 ,  H04W88/08

    CPC classification number: 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

    Abstract: 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.

    Abstract translation: 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。

    HIGH EFFICIENCY, REMOTELY RECONFIGURABLE REMOTE RADIO HEAD UNIT SYSTEM AND METHOD FOR WIRELESS COMMUNICATIONS
    4.
    发明申请
    HIGH EFFICIENCY, REMOTELY RECONFIGURABLE REMOTE RADIO HEAD UNIT SYSTEM AND METHOD FOR WIRELESS COMMUNICATIONS 有权
    高效，远程可重新配置的远程无线电头单元系统和无线通信方法

    公开(公告)号：US20150080054A1

    公开(公告)日：2015-03-19

    申请号：US14335647

    申请日：2014-07-18

    Applicant: DALI SYSTEMS CO. LTD.

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

    IPC: H03F1/32 ,  H04B1/00 ,  H03F3/68

    CPC classification number: 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

    Abstract: 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.

    Abstract translation: 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。

    HIGH EFFICIENCY, REMOTELY RECONFIGURABLE REMOTE RADIO HEAD UNIT SYSTEM AND METHOD FOR WIRELESS COMMUNICATIONS
    5.
    发明申请
    HIGH EFFICIENCY, REMOTELY RECONFIGURABLE REMOTE RADIO HEAD UNIT SYSTEM AND METHOD FOR WIRELESS COMMUNICATIONS 有权
    高效，远程可重新配置的远程无线电头单元系统和无线通信方法

    公开(公告)号：US20140079153A1

    公开(公告)日：2014-03-20

    申请号：US14020425

    申请日：2013-09-06

    Applicant: DALI SYSTEMS CO. LTD.

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

    IPC: H04B1/04

    CPC classification number: 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

    Abstract: 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.

    Abstract translation: 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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