公开(公告)号：US20190132083A1

公开(公告)日：2019-05-02

申请号：US16234545

申请日：2018-12-27

Applicant: SOLiD Inc.

Inventor： Young Man CHO

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

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.

公开(公告)号：US20190104072A1

公开(公告)日：2019-04-04

申请号：US16145252

申请日：2018-09-28

Applicant: SOLiD Inc.

Inventor： Dong Hee KWON ,  Hoo Pyo HONG ,  Young Man CHO

IPC: H04L12/813 ,  H04L12/24 ,  H04L12/751 ,  H04L12/725 ,  H04L12/851

CPC classification number: H04L47/20 ,  H04B7/022 ,  H04L41/0803 ,  H04L41/0893 ,  H04L45/02 ,  H04L45/302 ,  H04L45/64 ,  H04L47/2441 ,  H04W88/085

Abstract: Disclosed is a distributed antenna system (DAS). The DAS includes a DAS controller, which is an OpenFlow controller, and one or more DAS units in order to dynamically control a traffic transmission policy of the DAS units using an OpenFlow protocol, wherein the DAS controller generates and changes a traffic transmission policy by reflecting a traffic transmission policy change request by operator manipulation or a software-defined network supporting application and a need for changing of the traffic transmission policy according to a status of the DAS unit and a status of a port, and the DAS unit transmits received traffic to a destination according to the policy.

公开(公告)号：US20190028178A1

公开(公告)日：2019-01-24

申请号：US16144495

申请日：2018-09-27

Applicant: SOLiD, INC.

Inventor： Yung Keun OH

IPC: H04B7/155 ,  H04B7/26 ,  H04W40/22

Abstract: Provided are a base station signal matching device, and a base station interface unit and a distributed antenna system including the base station signal matching device. The base station signal matching device included in a distributed antenna system receiving a base station signal from at least one base station and transmitting the base station signal to at least one user terminal includes: a signal matching unit receiving a first base station signal from a corresponding base station and matching the first base station signal to be suitable for signal processing of the distributed antenna system; and a signal processing unit receiving the matched first base station signal from the signal matching unit, receiving a matched second base station signal from another base station signal matching device, and combining the matched first base station signal with the matched second base station signal.

公开(公告)号：US10187018B2

公开(公告)日：2019-01-22

申请号：US15788122

申请日：2017-10-19

Applicant: SOLiD, INC.

Inventor： Hwan Sun Lee

IPC: H03F1/32 ,  H03F3/24 ,  H03F3/19 ,  H03F1/26 ,  H03F1/30

Abstract: A wideband highly linear amplifier includes a plurality of pre-distortion units for respectively linearizing digital signals of a plurality of bands, a synthesis unit for synthesizing output signals of the pre-distortion units, a single amplifier for amplifying signals outputted from the synthesis unit, distribution units for respectively separating the signals for each of the plurality of bands from the output signals of the amplifier, a plurality of inverse compensation attenuators for respectively attenuating the separated signals for each of the plurality of bands, and a feedback path for respectively feeding the attenuated signals for each of the plurality of bands back into the pre-distortion unit of the corresponding band out of the plurality of the pre-distortion units.

公开(公告)号：US20180375573A1

公开(公告)日：2018-12-27

申请号：US16062951

申请日：2016-03-28

Applicant: SOLiD, INC.

Inventor： Ok Jin KIM

IPC: H04B10/079 ,  H04L7/00

CPC classification number: H04B10/0795 ,  G01S19/13 ,  H04B10/2575 ,  H04J3/0644 ,  H04J3/0682 ,  H04L7/0075 ,  H04L7/04

Abstract: The present invention provides a method of optical transmission delay compensation of a system including a main unit and a remote unit, wherein the main unit and the remote unit are connected to each other through an optical transmission line, including: receiving a reference signal, by the remote unit, generated by the main unit through the optical transmission line; analog converting the reference signal and performing analog processing on the reference signal; converting the analog-processed reference signal into an RF signal and radiating the RF signal; and measuring a delay time until the reference signal is generated and radiated as the RF signal. Accordingly, it is possible to obtain an effect of preventing degradation of service quality due to interference by synchronizing remote units and improving the service quality.

公开(公告)号：US20180337728A1

公开(公告)日：2018-11-22

申请号：US15777475

申请日：2016-11-18

Applicant: SOLiD, INC.

Inventor： Tae Hyeong KIM ,  Won Song CHANG ,  Sun Keun YU

IPC: H04B10/079 ,  H04B10/27 ,  H04J14/02

Abstract: A wavelength-setting auxiliary device according to an embodiment of the inventive concept includes an optical wavelength analyzer configured to transmit a test signal having a first wavelength to an optical line terminal, and to execute a central wavelength detection algorithm based on a result of detecting power of a return signal for the test signal to set optical wavelength information of a tunable optical module, and a connector connected to the tunable optical module for interfacing data transmitted between the optical wavelength analyzer and the tunable optical module.

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.

公开(公告)号：US10090941B2

公开(公告)日：2018-10-02

申请号：US15501002

申请日：2015-12-04

Applicant: SOLiD, INC.

Inventor： Youngju You

IPC: H04B1/04 ,  H04B17/16 ,  H03C1/62

Abstract: A remote apparatus includes: a plurality of sub amplification units amplifying radio frequency (RF) signals of different frequency bands, respectively; a test signal generation unit generating test signals of a frequency band for any one sub amplification unit among the plurality of sub amplification units; a conversion unit converting intermodulation (IM) signals generated in response to the test signals into a plurality of conversion IM signals by using a conversion signal of which a frequency is swept; and a control unit determining a degree of an intermodulation distortion by the any one sub amplification unit based on signal levels of the plurality of the conversion IM signals.

公开(公告)号：US20180262206A1

公开(公告)日：2018-09-13

申请号：US15757590

申请日：2016-03-07

Applicant: SOLiD, INC.

Inventor： Hee Cheol YUN ,  Seung Rog CHOI ,  Sun Keun YU ,  Tae Hyeong KIM

IPC: H03M7/30 ,  H04L1/00 ,  H04B10/516 ,  H04L27/26

CPC classification number: H03M7/30 ,  H03M7/70 ,  H04B10/516 ,  H04L1/0013 ,  H04L27/2634

Abstract: There is provided a digital data compression device including a domain converter configured to perform frequency domain conversion on input digital I/Q data and output coefficient data corresponding to the digital I/Q data; a data converter configured to receive the coefficient data output from the domain converter and convert the input coefficient data of Cartesian coordinates into coefficient data of polar coordinates; and a quantizer configured to quantize the coefficient data of the polar coordinates output from the data converter.

公开(公告)号：US20180234162A1

公开(公告)日：2018-08-16

申请号：US15540774

申请日：2015-12-21

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

Inventor： Hyunchae KIM

IPC: H04B7/155 ,  H04B17/318

CPC classification number: H04B7/15585 ,  H04B7/15507 ,  H04B7/15578 ,  H04B17/318 ,  H04W52/243 ,  H04W52/343 ,  Y02D70/1244 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/446

Abstract: According to an aspect of the inventive concept, there is provided an interference cancellation repeater includes: a signal transceiver configured to cancel an interference signal from an RF input signal and to output an RF output signal from which the interference signal has been canceled; and a controller configured to control a power mode of the signal transceiver by measuring traffic of a first signal in the signal transceiver.