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公开(公告)号：US09572178B1
公开(公告)日：2017-02-14
申请号：US15079442
申请日：2016-03-24
Applicant: SOLiD, INC.
Inventor： Kwangnam Seo , Doyoon Kim , Hyoungho Kim
CPC classification number: 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 signal input/output unit configured to receive m uplink signals from m lower node units and output the m uplink signals, and a multiplexer configured to generate a single uplink signal by selectively outputting any one of the m uplink signals at an interval of a predetermined output time. 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.
Abstract translation: 本发明构思涉及分布式天线系统（DAS），更具体地，涉及构成DAS的每个节点单元的上行链路信号传输操作。 DAS的节点单元包括：信号输入/输出单元，被配置为从m个下位单元接收m个上行链路信号并输出m个上行链路信号;以及多路复用器，被配置为通过选择性地输出m个上行链路中的任何一个来生成单个上行链路信号 信号以预定的输出时间间隔。 因此，可以提供能够处理和输出从多个远程单元接收的上行链路信号作为一个信号的DAS，而没有任何错误。
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公开(公告)号：US11025306B2
公开(公告)日：2021-06-01
申请号：US15540625
申请日：2015-12-30
Applicant: SOLiD, INC.
Inventor： Doyoon Kim , Kwangnam Seo
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.
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公开(公告)号：US11025203B2
公开(公告)日：2021-06-01
申请号：US16944453
申请日：2020-07-31
Applicant: SOLiD, INC.
Inventor： Kwangnam Seo , Doyoon Kim , Hyoungho Kim , Daesung Baek
Abstract: The inventive concept relates to a communication device comprising a DPD processor configured to output a plurality of pre-distorted signals by pre-distorting each of a plurality of input signals using an extracted feedback signal, a first signal combiner configured to combine a plurality of feedback signals corresponding to the plurality of pre-distorted signals and output a combined feedback signal, an analog-to-digital converter configured to convert the combined feedback signal into a digital signal and output a digital-converted combined feedback signal and a signal extractor configured to extract the digital-converted combined feedback signal and output the extracted feedback signal.
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公开(公告)号：US10084616B2
公开(公告)日：2018-09-25
申请号：US15459774
申请日：2017-03-15
Applicant: SOLiD, INC.
Inventor： Doyoon Kim , Kwangnam Seo
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).
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Patent Agency Ranking
5.发明授权公开(公告)号：US10693527B2
公开(公告)日：2020-06-23
申请号：US16455036
申请日：2019-06-27
Applicant: SOLiD, INC.
Inventor： Hyoungho Kim , Doyoon Kim , Kwangnam Seo
Abstract: A distributed antenna system includes a plurality of head-end devices for each receiving mobile communication signals from at least one corresponding base station, a hub communicatively coupled to the plurality of head-end devices, and a plurality of remote devices communicatively coupled to the hub, wherein the hub configured to distribute the mobile communication signals received from each of the plurality of head-end devices to the plurality of remote devices, wherein each of the plurality of remote devices is remotely disposed to transmit the distributed mobile communication signals to a terminal in service coverage, and wherein the hub includes a mixing processing stage configured to perform digital mixing processing on the mobile communication signals respectively received from the plurality of head-end devices, and a crest factor reduction (CFR) module disposed posterior to the mixing processing stage, with respect to a signal transmission direction.
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公开(公告)号：US10193599B2
公开(公告)日：2019-01-29
申请号：US15401241
申请日：2017-01-09
Applicant: SOLID, INC.
Inventor： Kwangnam Seo , Hyoungho Kim , Doyoon Kim
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.
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7.发明申请公开(公告)号：US20190319676A1
公开(公告)日：2019-10-17
申请号：US16455036
申请日：2019-06-27
Applicant: SOLiD, INC.
Inventor： Hyoungho KIM , Doyoon Kim , Kwangnam Seo
Abstract: A distributed antenna system includes a plurality of head-end devices for each receiving mobile communication signals from at least one corresponding base station, a hub communicatively coupled to the plurality of head-end devices, and a plurality of remote devices communicatively coupled to the hub, wherein the hub configured to distribute the mobile communication signals received from each of the plurality of head-end devices to the plurality of remote devices, wherein each of the plurality of remote devices is remotely disposed to transmit the distributed mobile communication signals to a terminal in service coverage, and wherein the hub includes a mixing processing stage configured to perform digital mixing processing on the mobile communication signals respectively received from the plurality of head-end devices, and a crest factor reduction (CFR) module disposed posterior to the mixing processing stage, with respect to a signal transmission direction.
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公开(公告)号：US10094705B2
公开(公告)日：2018-10-09
申请号：US15540494
申请日：2015-12-29
Applicant: SOLiD, INC.
Inventor： Hyoungho Kim , Kwangnam Seo , Doyoon Kim
IPC: H03M1/66 , G01G23/10 , G01G3/14 , G06F3/05 , H03D7/14 , H03D7/12 , H04L27/26 , H03M1/74 , H04L25/03 , H04B1/04
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.
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9.发明授权公开(公告)号：US09912387B2
公开(公告)日：2018-03-06
申请号：US15084749
申请日：2016-03-30
Applicant: SOLiD, INC.
Inventor： Hyoungho Kim , Doyoon Kim , Kwangnam Seo
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.
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