公开(公告)号：US20150303998A1

公开(公告)日：2015-10-22

申请号：US14580585

申请日：2014-12-23

Applicant: Dali Systems Co. Ltd.

Inventor： Shawn Patrick Stapleton ,  Sasa Trajkovic

IPC: H04B7/02

CPC classification number: H04B7/022 ,  H04L45/00

Abstract: A system for routing signals in a Distributed Antenna System (DAS) includes one or more Base Band Units (BBUs). Each of the one or more BBUs has one or more digital outputs. The system also includes a plurality of Digital Multiplexer Units (DMUs) coupled to each other and operable to route signals between the plurality of DMUs. Each of the plurality of DMUs is operable to receive one or more digital inputs from the one or more BBUs. The system further includes a plurality of Digital Remote Units (DRUs) coupled to the plurality of DMUs and operable to transport signals between the plurality of DRUs and one or more of the plurality of DMUs.

Abstract translation: 用于在分布式天线系统（DAS）中路由信号的系统包括一个或多个基带单元（BBU）。 一个或多个BBU中的每一个具有一个或多个数字输出。 该系统还包括彼此耦合并且可操作以在多个DMU之间路由信号的多个数字多路复用器单元（DMU）。 多个DMU中的每一个可操作以从一个或多个BBU接收一个或多个数字输入。 该系统还包括耦合到多个DMU的多个数字远程单元（DRU），并且可操作以在多个DRU与多个DMU中的一个或多个之间传送信号。

公开(公告)号：US09148324B2

公开(公告)日：2015-09-29

申请号：US13913207

申请日：2013-06-07

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Shawn Patrick Stapleton ,  Paul Lemson ,  Sasa Trajkovic ,  Albert S. Lee

IPC: H04W4/00 ,  H04L27/26 ,  H03F1/32 ,  H03F3/24 ,  H04L25/03 ,  H04L27/36 ,  H04W24/02 ,  H04B1/04 ,  H04W24/04 ,  H04W40/00

CPC classification number: 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

Abstract: 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.

Abstract translation: 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，其是现场可重配置并支持多调制方案（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。

公开(公告)号：US20150078471A1

公开(公告)日：2015-03-19

申请号：US14333277

申请日：2014-07-16

Applicant: Dali Systems Co. Ltd.

Inventor： Paul Lemson ,  Shawn Patrick Stapleton ,  Sasa Trajkovic

IPC: H04B7/04

CPC classification number: H04B7/04 ,  H04B7/022 ,  H04B10/25753 ,  H04W88/085

Abstract: A distributed antenna system includes a master unit including a downlink RF input operable to receive an RF input signal from a downlink port of a base station, a first optical port, and a second optical port. The distributed antenna system also includes a first remote unit coupled to the first optical port. The first remote unit comprises a downlink antenna port and a first uplink antenna port and a second remote unit coupled to the second optical port of the master unit. The second remote unit comprises a downlink antenna port and a second uplink antenna port. The master unit is operable to transmit a first RF signal associated with the first RF uplink signal to a first uplink port of the base station and transmit a second RF signal associated with the second RF uplink signal to a second uplink port of the base station.

Abstract translation: 分布式天线系统包括主单元，其包括可操作以从基站的下行链路端口，第一光端口和第二光端口接收RF输入信号的下行链路RF输入。 分布式天线系统还包括耦合到第一光端口的第一远程单元。 第一远程单元包括下行链路天线端口和第一上行链路天线端口以及耦合到主单元的第二光端口的第二远程单元。 第二远程单元包括下行链路天线端口和第二上行链路天线端口。 主单元可操作地将与第一RF上行链路信号相关联的第一RF信号发送到基站的第一上行链路端口，并将与第二RF上行链路信号相关联的第二RF信号发送到基站的第二上行链路端口。

公开(公告)号：US08913689B2

公开(公告)日：2014-12-16

申请号：US13777194

申请日：2013-02-26

Applicant: Dali Systems Co. Ltd.

Inventor： Wan-Jong Kim ,  Shawn Patrick Stapleton

IPC: H04K1/02 ,  H04B1/04

CPC classification number: H04B1/0475 ,  H03F1/02 ,  H03F1/3241 ,  H03F3/24 ,  H04B1/0017 ,  H04B2001/0425 ,  H04B2001/0433 ,  H04B2001/045

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。

公开(公告)号：US08824595B2

公开(公告)日：2014-09-02

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: H04L25/49 ,  H03F1/32 ,  H04B1/00 ,  H03F3/68 ,  H04B1/04 ,  H03F3/24 ,  H04W88/08 ,  H04W84/04 ,  H04W24/02

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。

公开(公告)号：US20140241461A1

公开(公告)日：2014-08-28

申请号：US13777194

申请日：2013-02-26

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Wan-Jong Kim ,  Shawn Patrick Stapleton

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03F1/02 ,  H03F1/3241 ,  H03F3/24 ,  H04B1/0017 ,  H04B2001/0425 ,  H04B2001/0433 ,  H04B2001/045

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。

公开(公告)号：US20140162664A1

公开(公告)日：2014-06-12

申请号：US13950160

申请日：2013-07-24

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Shawn Patrick Stapleton ,  Seyed Amin Hejazi

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H04W16/04 ,  H04W88/085

Abstract: A system for dynamically routing signals in a Distributed Antenna System includes a plurality of Digital Access Units (DAUs). The plurality of DAUs are coupled and operable to route signals between the plurality of DAUs. The system also includes a plurality of Digital Remote Units (DRUs) coupled to the plurality of DAUs and operable to transport signals between DRUs and DAUs and a plurality of Base Transceiver Stations (BTS). The system further includes a plurality of traffic monitoring modules and a network optimization goal and optimization algorithm.

Abstract translation: 一种用于在分布式天线系统中动态路由信号的系统包括多个数字接入单元（DAU）。 多个DAU被耦合并且可操作以在多个DAU之间路由信号。 该系统还包括耦合到多个DAU的多个数字远程单元（DRU），并且可操作以在DRU和DAU之间传输信号以及多个基站收发台（BTS）。 该系统还包括多个交通监控模块和网络优化目标和优化算法。

公开(公告)号：US20140072299A1

公开(公告)日：2014-03-13

申请号：US13777185

申请日：2013-02-26

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Shawn Patrick Stapleton ,  Sasa Trajkovic

IPC: H04B10/27 ,  H04W16/24

CPC classification number: H04B10/25754 ,  H04B10/27 ,  H04W16/24 ,  H04W16/26 ,  H04W88/085

Abstract: A system for data transport in a Distributed Antenna System (DAS) includes a plurality of remote Digital Access Units (DAUs) located at a Remote location. The plurality of remote DAUs are coupled to each other and operable to transport digital signals between the plurality of remote DAUs. The system also includes a plurality of central hubs. Each of the plurality of central hubs is in communication with one of the remote DAUs using an electrical communications path. The system further includes a plurality of transmit/receive cells. Each of the plurality of transmit/receive cells includes a plurality of remote hubs. Each of the remote hubs in one of the plurality of transmit/receive cells is in communication with one of the plurality of central hubs using an optical communications path.

Abstract translation: 分布式天线系统（DAS）中的数据传输系统包括位于远程位置的多个远程数字接入单元（DAU）。 多个远程DAU彼此耦合并且可操作以在多个远程DAU之间传送数字信号。 该系统还包括多个中心集线器。 多个中央集线器中的每一个使用电通信路径与远程DAU之一进行通信。 该系统还包括多个发送/接收小区。 多个发送/接收小区中的每一个包括多个远程集线器。 多个发送/接收小区之一中的每个远程集线器使用光通信路径与多个中央集线器之一进行通信。

公开(公告)号：US20140036770A1

公开(公告)日：2014-02-06

申请号：US13753288

申请日：2013-01-29

Applicant: Dali Systems Co., Ltd.

Inventor： Shawn Patrick Stapleton ,  Daryl Meerkeerk

IPC: H04W72/04 ,  H04W36/06

CPC classification number: H04W72/0453 ,  H04B7/022 ,  H04B7/15514 ,  H04B7/15542 ,  H04W36/06 ,  H04W88/085

Abstract: A method for communicating with wireless user devices includes receiving a signal at a DAU, the signal residing within a first frequency band and processing the signal at the DAU. The method also includes transmitting the processed signal from the DAU and receiving the transmitted signal at a DRU. The method further includes converting the signal to a second frequency band different than the first frequency band.

Abstract translation: 用于与无线用户设备进行通信的方法包括：在DAU处接收信号，该信号驻留在第一频带内，并处理DAU处的信号。 该方法还包括从DAU发送经处理的信号并在DRU处接收发送的信号。 该方法还包括将信号转换成与第一频带不同的第二频带。

公开(公告)号：US20130315291A1

公开(公告)日：2013-11-28

申请号：US13887133

申请日：2013-05-03

Applicant: DALI SYSTEMS CO., LTD.

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

IPC: H04B1/04

CPC classification number: 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

Abstract: An efficient baseband predistortion linearization method for reducing the spectral regrowth and compensating memory effects in wideband communication systems using effective multiplexing modulation technique such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. The present invention is based on the method of piecewise pre-equalized lookup table based predistortion, which is a cascade of a lookup table predistortion and piecewise pre-equalizers, to reduce the computational complexity and numerical instability for desired linearity performance with memory effects compensation for wideband transmitter systems. Therefore, the present invention could reduce the computational load, which saves hardware resources in an implementation and improve performance, in terms of adjacent channel power ratio.

Abstract translation: 公开了一种使用诸如宽带码分多址和正交频分复用之类的有效复用调制技术在宽带通信系统中减少频谱再生长和补偿存储器效应的有效的基带预失真线性化方法。 本发明基于基于分段预均衡查找表的预失真的方法，该预失真是查找表预失真和分段预均衡器的级联，以减少用于期望的线性性能的计算复杂度和数值不稳定性， 宽带发射机系统。 因此，本发明可以减少在相邻信道功率比方面在实现中节省硬件资源并提高性能的计算负荷。