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    DISTRIBUTED ANTENNA SYSTEM
    81.
    发明申请
    DISTRIBUTED ANTENNA SYSTEM 有权

    公开(公告)号：US20210135788A1

    公开(公告)日：2021-05-06

    申请号：US17149699

    申请日：2021-01-14

    Applicant: SOLiD Inc.

    Inventor： Young Man CHO

    IPC: H04L1/00 ,  H04B7/024 ,  H04B17/309 ,  H04L27/00

    Abstract: A technology related to a distributed antenna system is disclosed. In an exemplary embodiment, a distributed antenna system may include a master unit and a plurality of remote units. The master unit may be interfaced with a wireless communications network and perform a bidirectional simultaneous digital radio frequency distribution of a wireless signal. The plurality of remote units may be each coupled to the master unit, and each perform a wireless transmission or reception of a split radio frequency signal to or from terminals located within a coverage. The master unit and the plurality of remote units may transmit or receive digital radio frequency signals in a wavelet transform domain. The master unit may determine whether the digital radio frequency signal, transmitted by each of the remote units, is normal, and merge the digital radio frequency signals.

    Optical line testing device using optical signals having continuous waveform to identify fault location in optical line
    82.
    发明授权
    Optical line testing device using optical signals having continuous waveform to identify fault location in optical line 有权

    公开(公告)号：US10935457B2

    公开(公告)日：2021-03-02

    申请号：US16381281

    申请日：2019-04-11

    Applicant: SOLiD, INC.

    Inventor： Keewoon Na

    IPC: G01M11/00 ,  H04B10/071 ,  H04B10/079 ,  H04B10/50 ,  H04B10/572

    Abstract: An optical line testing device for measuring at least a cutting position of an optical line according to the present invention includes: a first wavelength tunable laser source configured to generate a first optical signal in which a plurality of wavelengths appear alternately and periodically; a second wavelength tunable laser source configured to generate a second optical signal which is identical to the first optical signal but has an adjustable delay time; and an interferometer configured to cause interference between a reflected optical signal, corresponding to the first optical signal, which is returning after having been emitted to the optical line, and the second optical signal to output an interference signal.

    BASE STATION INTERFACE MODULE AND DISTRIBUTED ANTENNA SYSTEM HAVING THE SAME
    83.
    发明申请
    BASE STATION INTERFACE MODULE AND DISTRIBUTED ANTENNA SYSTEM HAVING THE SAME 有权

    公开(公告)号：US20210014936A1

    公开(公告)日：2021-01-14

    申请号：US16788862

    申请日：2020-02-12

    Applicant: SOLiD, INC.

    Inventor： Jong Dae BYUN

    IPC: H04W88/08

    Abstract: A base station interface module included in a distributed antenna system includes: a separator configured to separate a base station signal input from a base station and output first and second base station signals; a pre-compensator configured to compensate for at least one of an amplitude and a phase of the first base station signal based on a preset compensation value; a first attenuator configured to attenuate the compensated first base station signal and to output the attenuated first base station signal to the distributed antenna system; and a second attenuator configured to attenuate the second base station signal and to terminate the attenuated second base station signal.

    METHOD OF PROCESSING COMMUNICATION SIGNAL AND COMMUNICATION NODE USING THE SAME
    85.
    发明申请
    METHOD OF PROCESSING COMMUNICATION SIGNAL AND COMMUNICATION NODE USING THE SAME 审中-公开

    公开(公告)号：US20200336177A1

    公开(公告)日：2020-10-22

    申请号：US16853992

    申请日：2020-04-21

    Applicant: SOLiD, INC.

    Inventor： Youngin KIM ,  Seongwook BYUN ,  Hosik JANG

    IPC: H04B7/024

    Abstract: A communication node processing a communication signal in a distributed antenna system comprises a data appearance frequency monitor configured to receive a communication signal including a sign bit string, a count leading zero bit string, and an additional data bit string, and to monitor data appearance frequency in the count leading zero bit string included in the received communication signal, a Huffman encoder configured to encode the count leading zero bit string into a corresponding codeword according to a Huffman encoding algorithm based on the data appearance frequency in the count leading zero bit string and an additional bit allocator configured to allocate additional bits to the additional data bit string when the number of bits in the count leading zero bit string decreases during the encoding process.

    Distributed antenna system and signal processing method thereof
    88.
    发明授权
    Distributed antenna system and signal processing method thereof 有权

    公开(公告)号：US10555267B2

    公开(公告)日：2020-02-04

    申请号：US15421637

    申请日：2017-02-01

    Applicant: SOLiD, INC.

    Inventor： Bongcheol Na

    IPC: H04W52/26 ,  H04W52/42 ,  H04W88/08

    Abstract: According to an aspect of the inventive concept, there is provided a headend apparatus, including: a spectrum analysis unit analyzing frequency spectrums of a plurality of base station signals to detect characteristic information of the plurality of base station signals; a control unit transmitting the characteristic information to a network management server connected to the headend apparatus and outputting power control information, generated based on the characteristic information, received from the network management server; and a plurality of RF units receiving at least one of the plurality of base station signals and controlling power of the plurality of base station signals based on the power control information and outputting the plurality of base station signals.

    Amplification device and relay apparatus including the same
    89.
    发明授权
    Amplification device and relay apparatus including the same 有权

    公开(公告)号：US10530313B2

    公开(公告)日：2020-01-07

    申请号：US15540668

    申请日：2015-12-30

    Applicant: SOLiD, INC.

    Inventor： Hwansun Lee ,  Jitaek Park

    IPC: H03F1/14 ,  H03F1/52 ,  H03F3/68 ,  H03F1/02

    Abstract: According to one mode of the inventive concept, an amplification device includes a first amplification unit configured to amplify an input signal when a power level of the input signal is within a first range, a second amplification unit configured to amplify the input signal when the power level of the input signal is within a second range, and an abnormality sensing unit configured to sense an occurrence of an abnormality in the second amplification unit. The abnormality sensing unit senses reverse power regarding an output of the second amplification unit to generate a sensed voltage and compares the sensed voltage with a reference voltage to sense whether an abnormality occurs in the second amplification unit.

    Interference cancellation repeater
    90.
    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.

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