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    Communication system and operating method thereof
    1.
    发明授权
    Communication system and operating method thereof 有权

    公开(公告)号：US11902006B2

    公开(公告)日：2024-02-13

    申请号：US17779423

    申请日：2020-11-25

    Applicant: SOLiD, INC.

    Inventor： Woosik Moon ,  Hoony Hong ,  Kwon Kim ,  Hyunchae Kim

    IPC: H04B7/155 ,  H04W72/21 ,  H04W74/08

    CPC classification number: H04B7/155 ,  H04W72/21 ,  H04W74/0833

    Abstract: Provided are a method of operating a communication system, the method comprises mapping some antennas selected from among a plurality of antennas of each of a plurality of first communication nodes and reception ports of a second communication node, combining uplink signals mapped to an identical reception port of the second communication node from among uplink signals received through the plurality of antennas, and transmitting the combined signals to the mapped reception ports of the second communication node, respectively.

    Repeater and signal attenuation method thereof
    3.
    发明授权
    Repeater and signal attenuation method thereof 有权

    公开(公告)号：US10291340B2

    公开(公告)日：2019-05-14

    申请号：US15916910

    申请日：2018-03-09

    Applicant: SOLiD, INC.

    Inventor： Nagwon Kwon ,  Hyunchae Kim

    IPC: H04B17/40 ,  H04B7/155 ,  H04W52/24 ,  H04W52/46 ,  H04B17/309

    Abstract: A repeater including an analog attenuator configured to attenuate an analog signal in response to a first control signal; an analog to digital converter (ADC) configured to convert the attenuated analog signal into a digital signal; a digital attenuator configured to attenuate the digital signal in response to a second control signal; and an attenuation controller configured to calculate average power and peak power of the attenuated digital signal, determine an attenuation value for each value of the calculated average power and peak power, and generate at least one of the first and second control signals based on the determined attenuation values.

    Interference cancellation repeater
    4.
    发明授权
    Interference cancellation repeater 有权

    公开(公告)号：US10211910B2

    公开(公告)日：2019-02-19

    申请号：US15540643

    申请日：2015-12-21

    Applicant: SOLiD, INC. ,  SOLIDSYSTEMS CO., LTD.

    Inventor： Hyunbeom Lee ,  Hyunchae Kim

    IPC: H04B7/155

    Abstract: According to an aspect of the inventive concept, there is provided an interference cancellation repeater for repeating a long term evolution (LTE) signal between a terminal and a base station, the interference cancellation repeater includes: an interference canceller configured to generate a restored LTE signal by canceling a feedback signal included in an input LTE signal; a sync signal detector configured to detect a first sync level which is a level with respect to a sync signal of the input LTE signal and a second sync level which is a level with respect to a sync signal of the restored LTE signal; and a gain controller configured to control a signal amplifier according to isolation calculated based on a difference between the first sync level and the second sync level.

    Repeater and operating method thereof
    5.
    发明授权
    Repeater and operating method thereof 有权

    公开(公告)号：US11101970B2

    公开(公告)日：2021-08-24

    申请号：US16423922

    申请日：2019-05-28

    Applicant: SOLiD, INC.

    Inventor： Hyunchae Kim ,  Hoony Hong

    IPC: H04B7/14 ,  H04L5/14 ,  H04B7/15

    Abstract: An operating method of a repeater, the operating method comprises: receiving a first communication signal according to a first mobile communication standard, generating a time division duplex (TDD) switching signal based on information about a start point of the received first communication signal, and controlling switching of an uplink and a downlink of a repeater that relays a second communication signal according to a second mobile communication standard based on the generated TDD switching signal.

    Interference cancellation repeater
    6.
    发明授权
    Interference cancellation repeater 有权

    公开(公告)号：US10396915B2

    公开(公告)日：2019-08-27

    申请号：US15540639

    申请日：2015-12-04

    Applicant: SOLID, INC. ,  SOLIDSYSTEMS CO., LTD.

    Inventor： Hyunchae Kim

    IPC: H04B17/318 ,  H04B7/155

    Abstract: An interference cancellation repeater according to the inventive concept includes: a first transmission/reception processing unit configured to adjust a gain of a radio frequency (RF) input signal input via a link antenna communicatively coupled to a base station; an interference canceller configured to cancel and output an interference signal from an output signal of the first transmission/reception processing unit; and a gain controller configured to extract a signal with constant magnitude regardless of a change in user traffic from the output signal of the interference canceller, and to adjust the gain of the RF input signal to a predetermined level by controlling the first transmission/reception processing unit based on the extracted signal.

    Interference cancellation repeater
    7.
    发明授权
    Interference cancellation repeater 有权

    公开(公告)号：US10181892B2

    公开(公告)日：2019-01-15

    申请号：US15783102

    申请日：2017-10-13

    Applicant: SOLiD, INC.

    Inventor： Nagwon Kwon ,  Hyunchae Kim

    IPC: H04B1/10 ,  H04B7/155

    Abstract: An interference cancellation repeater for canceling an interference signal included in an input signal including a first adaptive filter configured to generate a first estimated signal; a second adaptive filter configured to generate a second estimated signal; a first scaler configured to scale the first estimated signal based on a first scale factor determined according to a channel state; a second scaler configured to scale the second estimated signal based on a second scale factor determined according to the channel state; a first canceller configured to generate a first interference canceled signal based on the input signal and the scaled first estimated signal; and a second canceller configured to generate a second interference canceled signal based on the first interference canceled signal and the scaled second estimated signal.

    Method and devices for reducing peak to average power ratio
    8.
    发明授权
    Method and devices for reducing peak to average power ratio 有权

    公开(公告)号：US09954707B2

    公开(公告)日：2018-04-24

    申请号：US15391183

    申请日：2016-12-27

    Applicant: SOLiD, INC.

    Inventor： Nagwon Kwon ,  Hyunchae Kim

    IPC: H04B7/15 ,  H04L27/26 ,  H04W52/36

    CPC classification number: H04L27/2623 ,  H04B7/15 ,  H04L27/2624 ,  H04W52/36

    Abstract: According to an aspect of the inventive concept, there is provided a crest factor reduction (CFR) core, including: a clipper clipping an input signal; a delay unit delaying the input signal; a first subtractor subtracting the clipped input signal from the delayed input signal; an error shaping filter filtering the subtracted signal for shaping an error which occurs by the clipping of the input signal; a digital filter filtering the input signal for cancelling noise of the input signal; and a second subtractor subtracting the filtered subtracted signal from the filtered input signal.

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