公开(公告)号：US20140340255A1

公开(公告)日：2014-11-20

申请号：US14257209

申请日：2014-04-21

Applicant: DALI SYSTEMS CO., LTD.

Inventor： Daryl Meerkerk ,  Shawn Patrick Stapleton

IPC: G01S19/01

CPC classification number: G01S19/11 ,  G01S5/10

Abstract: A real-time locating system (RTLS) for localization using satellite navigation signals in a Distributed Antenna System includes Off-Air Access Units (OAAUs), each being operable to receive an individual satellite navigation signal from a satellite and to route signals optically to a digital access unit (DAU). Remote digital remote units (DRUs) are located at Remote locations and are operable to receive signals the DAUs. Each individual satellite navigation signal can be appropriately delayed (in a manner that accounts for a DRU's location). For each antenna, a separation distance between a mobile station and a DRU can be estimated based on a signal receipt time at the station. In combination, these distances can be used to estimate the mobile station's precise indoor position.

Abstract translation: 用于在分布式天线系统中使用卫星导航信号进行定位的实时定位系统（RTLS）包括空中接入单元（OAAU），每个接入单元可操作以从卫星接收单独的卫星导航信号，并以光学方式将信号路由到 数字存取单元（DAU）。 远程数字远程单元（DRU）位于远程位置，可操作以接收DAU信号。 每个单独的卫星导航信号可以被适当地延迟（以考虑DRU的位置的方式）。 对于每个天线，可以基于站上的信号接收时间来估计移动站和DRU之间的间隔距离。 综合起来，这些距离可用于估计移动台的精确室内位置。

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。

公开(公告)号：US20140223266A1

公开(公告)日：2014-08-07

申请号：US14095706

申请日：2013-12-03

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Qianqi Zhuang ,  Shawn Patrick Stapleton

IPC: H04L1/00

CPC classification number: H04L1/0011 ,  H04B7/022 ,  H04L1/0045 ,  H04L1/0061

Abstract: A method of conditioning payload data includes providing a processor and receiving a packet comprising payload data, a first error code, and a second error code. The method also includes computing, using the processor, a first recalculated error code and determining a difference between the first error code and the first recalculated error code. The method further includes modifying the payload data in response to determining the difference.

Abstract translation: 调节有效载荷数据的方法包括提供处理器并接收包括有效载荷数据，第一错误代码和第二错误代码的分组。 该方法还包括使用处理器计算第一重新计算的错误代码并确定第一错误代码和第一重新计算的错误代码之间的差异。 该方法还包括响应于确定差异来修改有效载荷数据。

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。

公开(公告)号：US20140191805A1

公开(公告)日：2014-07-10

申请号：US14087682

申请日：2013-11-22

Applicant: Dali Systems Co., Ltd.

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

IPC: H03F1/02 ,  H03F3/21

CPC classification number: H03F1/0288 ,  H03F1/0261 ,  H03F1/56 ,  H03F3/193 ,  H03F3/211 ,  H03F3/607 ,  H03F2200/451 ,  H03F2203/21106

Abstract: A power amplifier using N-way Doherty structure with adaptive bias supply power tracking for extending the efficiency region over the high peak-to-average power:ratio of the multiplexing modulated signals such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. In an embodiment, present invention uses a dual-feed distributed structure to an N-way Doherty amplifier to improve the isolation between at least one main amplifier and at least one peaking amplifier and, and also to improve both gain and efficiency performance at high output back-off power. Hybrid couplers can be used at either or both of the input and output. In at least some implementations, circuit space is also conserved due to the integration of amplification, power splitting and combining.

Abstract translation: 公开了一种使用具有自适应偏置电源功率跟踪的N路Doherty结构的功率放大器，用于在高峰值与平均功率之间扩展效率区域：多路调制信号比例，如宽带码分多址和正交频分复用 。 在一个实施例中，本发明使用双馈馈分布式结构到N路Doherty放大器来改善至少一个主放大器与至少一个峰化放大器之间的隔离，并且还可以在高输出下提高增益和效率性能 后退电源 混合耦合器可以在输入和输出中的任一个或两者上使用。 在至少一些实现中，由于放大，功率分配和组合的集成，电路空间也是保守的。

公开(公告)号：US20140169263A1

公开(公告)日：2014-06-19

申请号：US14044668

申请日：2013-10-02

Applicant: Dali Systems Co. Ltd.

Inventor： Shawn Patrick Stapleton

IPC: H04B7/02

CPC classification number: H04W40/22 ,  H04B7/026 ,  H04B10/25753 ,  H04W40/20 ,  H04W88/085

Abstract: Embodiments may allow remote base transceiver stations (BTSs) physically located away from a local source of users to be able to provide local service as if the remote BTSs were at or near the local source of users. Some embodiments may include a plurality of BTSs, each having one or more sectors, and one or more digital access units (DAUs). Embodiments may also include a plurality of repeater digital units (RDUs), where each RDU may be configured to communicate to at least one of the plurality of BTSs and may be operable to route signals optically to the one or more DAUs. Embodiments may also include a plurality of digital remote units (DRUs) located at a location remote to the one or more DAUs, wherein the plurality of remote DRUs may be operable to transport signals to the one or more DAUs.

Abstract translation: 实施例可以允许物理上远离本地用户源的远程基站收发台（BTS）能够提供本地服务，就好像远程BTS处于或接近本地用户源。 一些实施例可以包括多个BTS，每个BTS具有一个或多个扇区，以及一个或多个数字访问单元（DAU）。 实施例还可以包括多个中继器数字单元（RDU），其中每个RDU可以被配置为与多个BTS中的至少一个通信，并且可以用于将信号光学地路由到一个或多个DAU。 实施例还可以包括位于远离一个或多个DAU的位置处的多个数字远程单元（DRU），其中多个远程DRU可操作以将信号传送到一个或多个DAU。

公开(公告)号：US20140037292A1

公开(公告)日：2014-02-06

申请号：US13754702

申请日：2013-01-30

Applicant: Dali Systems Co. Ltd.

Inventor： Shawn Patrick Stapleton ,  Sasa Trajkovic

IPC: H04B10/27

CPC classification number: H04Q11/0067 ,  H04B10/25753 ,  H04B10/27 ,  H04J14/0286 ,  H04Q11/0005 ,  H04Q2011/0016 ,  H04W40/02 ,  H04W88/085 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/30

Abstract: A system for routing signals in a Distributed Antenna System includes a plurality of local Digital Access Units (DAUs) located at a Local location. Each of the plurality of local DAUs is coupled to each other and operable to route signals between the plurality of local DAUs. Each of the plurality of local DAUs includes one or more Base Transceiver Station (BTS) RF connections. Each of the plurality of BTS RF connections is operable to be coupled to one of one or more sectors of a BTS. The system also includes a plurality of remote DAUs located at a Remote location. The plurality of remote DAUs are coupled to each other and operable to transport signals between the plurality of remote DAUs.

Abstract translation: 用于在分布式天线系统中路由信号的系统包括位于本地位置的多个本地数字接入单元（DAU）。 多个本地DAU中的每一个彼此耦合并且可操作以在多个本地DAU之间路由信号。 多个本地DAU中的每一个包括一个或多个基站收发台（BTS）RF连接。 多个BTS RF连接中的每一个可操作以耦合到BTS的一个或多个扇区中的一个。 该系统还包括位于远程位置的多个远程DAU。 多个远程DAU彼此耦合并可操作以在多个远程DAU之间传送信号。

公开(公告)号：US20130272202A1

公开(公告)日：2013-10-17

申请号：US13913207

申请日：2013-06-07

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Shawn Patrick Stapleton ,  Paul Lemson ,  Bin Lin ,  Albert S. Lee

IPC: H04W24/02

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。

公开(公告)号：US20130214861A1

公开(公告)日：2013-08-22

申请号：US13776163

申请日：2013-02-25

Applicant: Dali Systems Co. Ltd.

Inventor： Wan Jong KIM ,  Shawn Patrick Stapleton

IPC: H03F1/32

CPC classification number: 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

Abstract: 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.

Abstract translation: 基带衍生的RF预失真系统，其使用具有在基带处提取的系数然后通过矢量调制器在RF处施加的系数的查找表。 该架构将包络预失真的窄带优势与基带预失真的精度相结合，并包括对记忆效应的补偿。 还描述了基于多项式的替代方案。

公开(公告)号：US11156719B2

公开(公告)日：2021-10-26

申请号：US16535176

申请日：2019-08-08

Applicant: Dali Systems Co. Ltd.

Inventor： Shawn Patrick Stapleton

IPC: G01S19/11 ,  G01S19/01 ,  G01S19/00

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 local 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 and a GPS receiver at the remote location used in a feedback loop with the DRU to control the delays.