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公开(公告)号：US20210409119A1
公开(公告)日：2021-12-30
申请号：US17366686
申请日：2021-07-02
Applicant: DALI SYSTEMS CO., LTD
Inventor： Shawn Patrick STAPLETON , Sasa TRAJKOVIC , Wolfgang WEBER
IPC: H04B10/2575 , H04W52/24 , H04W52/28 , H04B10/564
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.
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公开(公告)号：US20220113431A1
公开(公告)日：2022-04-14
申请号：US17510236
申请日：2021-10-25
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Shawn Patrick STAPLETON
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.
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公开(公告)号：US20220007094A1
公开(公告)日：2022-01-06
申请号：US17367092
申请日：2021-07-02
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Shawn Patrick STAPLETON , Sasa TRAJKOVIC
IPC: H04Q11/00 , H04J14/02 , H04W40/02 , H04B10/27 , H04B10/2575
Abstract: A system for routing signals in a Distributed Antenna System (DAS) includes one or more local Digital Access Units (DAUs) located at a local location and one or more remote DAUs located at one or more remote locations. Each of the one or more local DAUs includes an optical port coupled to an upstream unit. The upstream unit includes at least one of a repeater, a baseband unit, a Base Transceiver Station (BTS), or a DAU. The one or more remote DAUs are coupled to the one or more local DAUs via one or more optical cables. A distance between the local location and each of the one or more remote locations is greater than two kilometers.
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公开(公告)号：US20210376871A1
公开(公告)日：2021-12-02
申请号：US17403725
申请日：2021-08-16
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Wan-Jong KIM , Shawn Patrick STAPLETON
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.
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公开(公告)号：US20200336161A1
公开(公告)日：2020-10-22
申请号：US16922773
申请日：2020-07-07
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Wan-Jong KIM , Shawn Patrick STAPLETON
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.
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Patent Agency Ranking
公开(公告)号：US20200296598A1
公开(公告)日：2020-09-17
申请号：US16891918
申请日：2020-06-03
Applicant: DALI SYSTEMS CO. LTD
Inventor： Sasa TRAJKOVIC , Shawn Patrick STAPLETON , Qianqi ZHUANG
IPC: H04W16/26 , H04B10/2575
Abstract: A system for networking Wi-Fi Access Points 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 DAU ports and DRU ports. The system further includes a Framer/Deframer, wherein the cellular payload data is separated from the IP data and a network switch. The IP data from a plurality of DAU and DRU ports are buffered and routed to a plurality of DAU and DRU ports. Furthermore, the system includes a plurality of Wi-Fi access points coupled via a mesh network to Wi-Fi access points connected to a plurality of DRUs.
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公开(公告)号：US20220231714A1
公开(公告)日：2022-07-21
申请号：US17666357
申请日：2022-02-07
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Wan-Jong KIM , Shawn Patrick STAPLETON
Abstract: A method of operating a communications system includes receiving a signal at a digital predistorter (DPD), introducing predistortion to the signal using the DPD, and converting the predistorted signal to an analog signal using a digital-to-analog converter having a first bandwidth. The method also includes amplifying the analog signal, sampling the amplified signal using an analog-to-digital converter having a second bandwidth less than the first bandwidth, and extracting coefficients of the DPD from the sampled signal.
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公开(公告)号：US20200244316A1
公开(公告)日：2020-07-30
申请号：US16849087
申请日：2020-04-15
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Shawn Patrick STAPLETON , Sasa TRAJKOVIC
IPC: H04B7/022 , H04L12/701
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.
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公开(公告)号：US20200236735A1
公开(公告)日：2020-07-23
申请号：US16789644
申请日：2020-02-13
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Albert S. LEE , Shawn Patrick STAPLETON , Paul LEMSON , Gary SPEDALIERE
Abstract: According to an embodiment of the present invention, a network is provided. The network may include a first base transceiver station (BTS). The first BTS may be operable to provide a first signal including a plurality of first carriers. The network may also include a second BTS operable to provide a second signal including a plurality of second carriers. The network may also include a set of one or more digital access units (DAUs), each of the one or more DAUs being coupled to at least one of the first BTS or the second BTS. A set of one or more digital remote units (DRUs) may be included in the network, each of the DRUs being coupled to one of the one or more DAUs and operable to broadcast the first signal or the second signal.
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10.发明申请公开(公告)号：US20200186250A1
公开(公告)日：2020-06-11
申请号：US16734833
申请日：2020-01-06
Applicant: DALI SYSTEMS CO. LTD.
Inventor： Shawn Patrick STAPLETON , Sasa TRAJKOVIC
IPC: H04B10/2575 , H04L25/02 , H04B7/022
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.
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