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    Multi-band wide band power amplifier digital predistortion system
    32.
    发明授权
    Multi-band wide band power amplifier digital predistortion system 有权
    多波段宽带功率放大器数字预失真系统

    公开(公告)号：US08467747B2

    公开(公告)日：2013-06-18

    申请号：US13705022

    申请日：2012-12-04

    Applicant: Dali Systems Co. Ltd., Maples Corporate Services Limited

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

    IPC: H04B1/04

    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。

    SYSTEM AND METHOD FOR PERFORMANCE OPTIMIZATION IN AND THROUGH A DISTRIBUTED ANTENNA SYSTEM
    35.
    发明申请
    SYSTEM AND METHOD FOR PERFORMANCE OPTIMIZATION IN AND THROUGH A DISTRIBUTED ANTENNA SYSTEM 审中-公开

    公开(公告)号：US20200059299A1

    公开(公告)日：2020-02-20

    申请号：US16360980

    申请日：2019-03-21

    Applicant: Dali Systems Co. Ltd.

    Inventor： Shawn Patrick Stapleton ,  Sasa Trajkovic ,  Wolfgang Weber

    IPC: H04B10/2575 ,  H04B10/564 ,  H04W52/28 ,  H04W52/24

    Abstract: A method for operating a Distributed Antenna System (DAS) includes providing a plurality of Digital Remote Units (DRUs), each configured to send and receive wireless radio signals and providing a plurality of inter-connected Digital Access Units (DAUs), each configured to communicate with at least one of the plurality of DRUs via optical signals and each being coupled to at least one sector of a base station. The method also includes providing a plurality of sensors operable to detect activity at each of the plurality of DRUs, turning off a DRU downlink signal at one of the plurality of DRUs in response to an output from one of the plurality of sensors, and turning on a DRU downlink signal at another of the plurality of DRUs in response to an output from another of the plurality of sensors.

    Method and system for link synchronization in an LTE-TDD architecture
    37.
    发明授权
    Method and system for link synchronization in an LTE-TDD architecture 有权

    公开(公告)号：US10455535B2

    公开(公告)日：2019-10-22

    申请号：US15820299

    申请日：2017-11-21

    Applicant: Dali Systems Co. Ltd.

    Inventor： Wan-Jong Kim ,  Shawn Patrick Stapleton

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

    Self-optimizing distributed antenna system using soft frequency reuse
    38.
    发明授权
    Self-optimizing distributed antenna system using soft frequency reuse 有权

    公开(公告)号：US10433261B2

    公开(公告)日：2019-10-01

    申请号：US15676631

    申请日：2017-08-14

    Applicant: Dali Systems Co. Ltd.

    Inventor： Seyed Amin Hejazi ,  Shawn Patrick Stapleton

    IPC: H04W52/24 ,  H04L5/00 ,  H04W52/34 ,  H04W72/04

    Abstract: A method of determining a carrier power in a communications system including a processor includes a) setting a power differential between a reference carrier and one or more carriers, b) measuring a number of satisfied users at the power differential, and c) measuring a capacity for the satisfied users at the power differential. The method also includes d) increasing the power differential by a predetermined amount and e) determining, using the processor, that the number of satisfied users at the increased power differential is greater than or equal to the number of satisfied users at the power differential. The method further includes f) repeating a)-c) and g) setting the carrier power at an iterated power level.

    INDOOR LOCALIZATION USING DIGITAL OFF-AIR ACCESS UNITS
    39.
    发明申请
    INDOOR LOCALIZATION USING DIGITAL OFF-AIR ACCESS UNITS 审中-公开

    公开(公告)号：US20190250275A1

    公开(公告)日：2019-08-15

    申请号：US16205567

    申请日：2018-11-30

    Applicant: Dali Systems Co. Ltd.

    Inventor： Shawn Patrick Stapleton

    IPC: G01S19/01 ,  G01S19/11

    CPC classification number: G01S19/01 ,  G01S19/11

    Abstract: A system for indoor localization using satellite navigation signals in a Distributed Antenna System includes a plurality of Off-Air Access Units (OAAUs). Each of the plurality of OAAUs is operable to receive an individual satellite navigation signal from at least one of a plurality of satellites and operable to route signals optically to one or more DAUs. The system also includes a plurality of remote DRUs located at a Remote location. The plurality of remote DRUs are operable to receive signals from a plurality of the one or more DAUs. The system further includes an algorithm to delay each individual satellite navigation signal for providing indoor localization at each of the plurality of DRUs.

    System and method for performance optimization in and through a distributed antenna system
    40.
    发明授权
    System and method for performance optimization in and through a distributed antenna system 有权

    公开(公告)号：US10284296B2

    公开(公告)日：2019-05-07

    申请号：US14621192

    申请日：2015-02-12

    Applicant: Dali Systems Co. Ltd.

    Inventor： Shawn Patrick Stapleton ,  Sasa Trajkovic ,  Wolfgang Weber

    IPC: H04W4/029 ,  H04W52/02 ,  H04W52/24 ,  H04W52/28 ,  H04B10/564 ,  H04B10/2575

    Abstract: A method for operating a DAS includes providing a set of digital remote units (remotes) operable to send and receive wireless radio signals. Each of the set of remotes is associated with a geographic area. The method also includes providing a digital access unit (host) operable to communicate with the set of remotes, receiving uplink signals at one or more of the set of remotes, and monitoring train activity in the geographic areas. The method further includes increasing a gain coefficient associated with one of the set of remotes in response to determining an increase in monitored train activity, decreasing a gain coefficient associated with another of the set of remotes in response to determining a decrease in monitored train activity, and transmitting, to the host, scaled uplink signals associated with the one of the set of remotes and the another of the set of remotes.

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