公开(公告)号：US20180198493A1

公开(公告)日：2018-07-12

申请号：US15911736

申请日：2018-03-05

Applicant: SOLiD, INC.

Inventor： Hyoungho KIM ,  Doyoon KIM ,  Kwangnam SEO

IPC: H04B7/022 ,  H04L27/26

CPC classification number: H04B7/022 ,  H04L27/2614 ,  H04L27/2624

Abstract: A distributed antenna system includes a plurality of head-end units for each receiving mobile communication signals from at least one corresponding base station, a hub unit communicatively coupled to the plurality of head-end units, and a plurality of remote units communicatively coupled to the hub unit, wherein the hub unit configured to distribute the mobile communication signals received from each of the plurality of head-end units to the plurality of remote units, wherein each of the plurality of remote units is remotely disposed to transmit the distributed mobile communication signals to a terminal in service coverage, and wherein the hub unit includes a mixing processing stage configured to perform digital mixing processing on the mobile communication signals respectively received from the plurality of head-end units, and a crest factor reduction (CFR) module disposed posterior to the mixing processing stage, with respect to a signal transmission direction.

公开(公告)号：US20170187550A1

公开(公告)日：2017-06-29

申请号：US15459774

申请日：2017-03-15

Applicant: SOLiD, INC.

Inventor： Doyoon KIM ,  Kwangnam SEO

IPC: H04L25/02 ,  H04L27/26

CPC classification number: H04L25/0262 ,  H04L25/02 ,  H04L27/2623

Abstract: A peak cancellation-crest factor reduction (PC-CFR) device includes a clipping unit configured to output a clipping error signal by clipping amplitude values of a first baseband complex signal based on a predetermined threshold value; a peak value determination unit configured to receive the clipping error signal, and determine a first amplitude value as a peak value when the first amplitude value is greater than a second amplitude value input before the first amplitude value and a third amplitude value input after the first amplitude value among amplitude values of the clipping error signal; a cancellation pulse generator (CPG) allocation unit configured to allocate the peak value to a CPG; and a subtractor configured to subtract a cancellation pulse generated from the CPG from the first baseband complex signal and output a second baseband complex signal with a reduced peak-to-average power ratio (PAPR).

公开(公告)号：US20170370766A1

公开(公告)日：2017-12-28

申请号：US15540494

申请日：2015-12-29

Applicant: SOLiD, INC.

Inventor： Hyoungho KIM ,  Kwangnam SEO ,  Doyoon KIM

IPC: G01G23/10 ,  G06F3/05 ,  G01G3/14

CPC classification number: G01G23/10 ,  G01G3/1414 ,  G06F3/05 ,  H03D7/125 ,  H03D7/1441 ,  H03M1/0626 ,  H03M1/12 ,  H03M1/747 ,  H04B1/0483 ,  H04L25/03038 ,  H04L27/2647

Abstract: According to an aspect of the inventive concept, there is provided an apparatus for processing an output signal of an analog-digital converter, includes: a first frequency conversion unit for converting a frequency of the output signal of the analog-digital converter so that a band where spurious components exist moves to a band where direct current components exist in the output signal of the analog-digital converter; a spurious component blocking unit for eliminating, from an output signal of the first frequency conversion unit, spurious components which have moved to the band where direct current components exist; and a second frequency conversion unit for restoring a frequency of an output signal of the spurious component blocking unit to the original frequency of the output signal of the analog-digital converter.

公开(公告)号：US20170118768A1

公开(公告)日：2017-04-27

申请号：US15401241

申请日：2017-01-09

Applicant: SOLID, INC.

Inventor： Kwangnam SEO ,  Hyoungho KIM ,  Doyoon KIM

IPC: H04W72/12 ,  H04B7/04

CPC classification number: H04B7/04 ,  H04B1/40 ,  H04W88/085

Abstract: The inventive concept relates to a distributed antenna system (DAS), and more particularly, to an uplink signal transmission operation of each of node units constituting a DAS. A node unit of a DAS includes a multiplexer configured to generate a single uplink signal by selectively outputting any one of m uplink signals received from m lower node units at an interval of a predetermined output time, where m is a positive integer greater than 1, and a down-sampler configured to output a transmission uplink signal by converting a sampling rate of the single uplink signal to correspond to a sampling rate of any one of the m uplink signals. Accordingly, it is possible to provide a DAS capable of processing and outputting, as one signal, uplink signals received from a plurality of remote units, without any error.

公开(公告)号：US20250141724A1

公开(公告)日：2025-05-01

申请号：US18692434

申请日：2022-08-24

Applicant: SOLiD, INC.

Inventor： Kwangnam SEO ,  Hyunchae KIM

IPC: H04L27/26 ,  H04L5/00

Abstract: Provided are a method of operating a communication node that includes a memory and a processor and receives and processes a communication signal with a variable number of component carriers comprising dividing the communication signal into a plurality of divided signals based on the number of component carriers included in the received communication signal and the number of signal processing paths provided in the communication node and distributing the plurality of divided signals to the signal processing paths provided in the communication node, respectively, and processing the divided signals.

公开(公告)号：US20170359103A1

公开(公告)日：2017-12-14

申请号：US15540625

申请日：2015-12-30

Applicant: SOLiD, INC.

Inventor： Doyoon KIM ,  Kwangnam SEO

IPC: H04B7/02 ,  H04L25/26 ,  H04L25/03

CPC classification number: H04B7/02 ,  H04B7/022 ,  H04B10/25753 ,  H04L25/03 ,  H04L25/26 ,  H04W88/085

Abstract: According to an aspect of the inventive concept, there is provided a signal processing method performed in a distributed antenna system, includes extracting at least a part of sample data corresponding to an occupied frequency band from a digitized analog RF signal; and combining the extracted sample data.

公开(公告)号：US20160211891A1

公开(公告)日：2016-07-21

申请号：US15084749

申请日：2016-03-30

Applicant: SOLiD, INC.

Inventor： Hyoungho KIM ,  Doyoon KIM ,  Kwangnam SEO

IPC: H04B7/02 ,  H04L27/26

CPC classification number: H04B7/022 ,  H04L27/2614 ,  H04L27/2624

Abstract: A distributed antenna system includes a plurality of head-end units for each receiving mobile communication signals from at least one corresponding base station, a hub unit communicatively coupled to the plurality of head-end units, and a plurality of remote units communicatively coupled to the hub unit, wherein the hub unit configured to distribute the mobile communication signals received from each of the plurality of head-end units to the plurality of remote units, wherein each of the plurality of remote units is remotely disposed to transmit the distributed mobile communication signals to a terminal in service coverage, and wherein the hub unit includes a mixing processing stage configured to perform digital mixing processing on the mobile communication signals respectively received from the plurality of head-end units, and a crest factor reduction (CFR) module disposed posterior to the mixing processing stage, with respect to a signal transmission direction.

Abstract translation: 分布式天线系统包括多个头端单元，用于各自接收来自至少一个对应的基站的移动通信信号，通信地耦合到多个头端单元的集线器单元，以及多个远程单元，其通信地耦合到 集线器单元，其中所述集线器单元被配置为将从所述多个头端单元中的每一个接收的移动通信信号分配给所述多个远程单元，其中所述多个远程单元中的每一个被远程布置以发送所述分布式移动通信信号 到服务覆盖的终端，其中，所述集线器单元包括混合处理级，其被配置为对从所述多个头端单元分别接收的移动通信信号执行数字混合处理，以及设置在后端的波峰因数降低（CFR）模块 到混合处理阶段，相对于信号传输方向。