公开(公告)号：US10383171B2

公开(公告)日：2019-08-13

申请号：US15848331

申请日：2017-12-20

Applicant: SOLiD, INC.

Inventor： Hyoungho Kim ,  Doyoon Kim

IPC: H04B7/022 ,  H04W88/08

Abstract: A distributed antenna system (DAS) according to an aspect of the inventive concept includes a first node unit for receiving first digital data in accordance with a digital interface standard from a base station, converting the first digital data into second digital data in accordance with a DAS frame standard, and a second node unit for receiving the second digital data from the first node unit, and restoring the first digital data based on the second digital data.

公开(公告)号：US20190238231A1

公开(公告)日：2019-08-01

申请号：US16381259

申请日：2019-04-11

Applicant: SOLiD, INC.

Inventor： Young Ju YOU

IPC: H04B10/2575 ,  H04B7/0413 ,  H01Q1/24 ,  H04B7/022 ,  H04B7/024

CPC classification number: H04B10/25754 ,  H01Q1/246 ,  H04B7/022 ,  H04B7/024 ,  H04B7/0413 ,  H04W88/085

Abstract: A head-end device according to an embodiment includes: a plurality of base station interfacing units configured to interface each of transmission/reception signals that are exchanged between the head-end device and a plurality of base stations; and a head-end control unit configured to receive an upper interfacing unit signal transmitted from an upper base station interfacing unit from among the plurality of base station interfacing units, and sequentially transmit the received upper interfacing unit signal to a lower base station interfacing unit.

公开(公告)号：US10312935B2

公开(公告)日：2019-06-04

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 ,  H04L27/26 ,  H04B10/516 ,  H04B10/2575

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：US10274398B2

公开(公告)日：2019-04-30

申请号：US15539267

申请日：2015-12-22

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.

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.

公开(公告)号：US20180375549A1

公开(公告)日：2018-12-27

申请号：US16118793

申请日：2018-08-31

Applicant: SOLiD, INC.

Inventor： Yong Ki CHO

IPC: H04B7/024 ,  H04W72/04 ,  H04L5/00

Abstract: There is provided a first unit which constitutes a point-to-multipoint communication system and is connected to communicate with each of a plurality of second units. The first unit includes a control signal extraction unit, a signal switching unit and a controller. The control signal extraction unit extracts first control signals respectively transmitted from the plurality of second units. The signal switching unit includes a switching circuit, and selects any one of the first control signals respectively received through individual signal transmission lines. The controller receives the first control signal selected by the signal switching unit, determines an allocation ID to be allocated to a second unit corresponding to the selected first control signal based on the initial identification information of the selected first control signal, and controls the determined allocation ID to be transmitted to the corresponding second unit.

公开(公告)号：US20180302156A1

公开(公告)日：2018-10-18

申请号：US15570596

申请日：2016-03-28

Applicant: SOLiD, INC.

Inventor： Jaeyoung HEO ,  Kyungmin KIM ,  Gilkook KIM ,  Bumsoo PARK ,  Chinhyoung AN

IPC: H04B10/079 ,  H04B7/185 ,  H04W56/00 ,  H04B10/118

CPC classification number: H04B10/07953 ,  H04B7/185 ,  H04B7/18571 ,  H04B10/118 ,  H04B10/25753 ,  H04W56/001

Abstract: A satellite signal relay system according to an embodiment of the inventive concept includes: a plurality of remote units configured to receive an analog satellite signal, to convert the analog satellite signal into a digital satellite signal, to generate a characteristic signal for the analog satellite signal, to generate a transmission frame based on the digital satellite signal and the characteristic signal, and to convert the transmission frame into an optical transmission frame; and a central unit configured to convert optical transmission frames received from the plurality of remote units into transmission frames through an optical transmission medium, respectively, to extract a digital satellite signal and a characteristic signal from each of the converted transmission frames, and to convert any one of the extracted digital satellite signals into an analog satellite signal based on the extracted characteristics signals.

公开(公告)号：US10056917B2

公开(公告)日：2018-08-21

申请号：US15397921

申请日：2017-01-04

Applicant: SOLiD, Inc.

Inventor： Donghoon Hong ,  Hosik Jang ,  Youngin Kim

IPC: H03M7/30 ,  G06F7/485 ,  G06F7/556 ,  G06F7/48

CPC classification number: H03M7/30 ,  G06F7/4824 ,  G06F7/483 ,  G06F7/485 ,  G06F7/556 ,  H03M7/24

Abstract: A data compression device includes an analog to digital converter (ADC) configured to convert an analog signal into a digital signal including in-phase and quadrature components; and a compressor configured to generate a 28-bit fixed-point digital signal in which bits of the in-phase and quadrature components are alternately arranged, generate an exponent bit string by comparing n most significant bits of a data bit string excluding two sign bits in the 28-bit fixed-point digital signal with preset mapping data, wherein the exponent bit string includes 4 bits, generate a mantissa bit string composed of 14 bits corresponding to up to 14th bit from a bit next to the n most significant bits of the data bit string, and generate a 20-bit floating point digital signal by combining the two sign bits, the exponent bit string, and the mantissa bit string, wherein n is a natural number equal to or greater than 2 and equal to or less than 12.

公开(公告)号：US20180219715A1

公开(公告)日：2018-08-02

申请号：US15883628

申请日：2018-01-30

Applicant: SOLiD, INC.

Inventor： Jitaek PARK

IPC: H04L27/26 ,  H04L7/06 ,  H04B10/272

CPC classification number: H04L27/2657 ,  H04B10/272 ,  H04J11/0069 ,  H04J14/0245 ,  H04L7/06 ,  H04L12/2801 ,  H04L12/4625 ,  H04W56/00

Abstract: A method of recovering a synchronization detection error according to an embodiment includes: determining whether a base station signal input to a head-end device is detected; determining whether a head-end signal output from the head-end device, which is obtained by processing the base station signal by the head-end device, is detected by a lower device of the head-end device; determining whether synchronization of the head-end signal is detected based on the head-end signal input to the lower device; and changing a set frequency band or performing automatic gain control of the head-end device based on whether the base station signal is detected, whether the head-end signal is detected, and whether the synchronization of the head-end signal is detected.

公开(公告)号：US10020868B2

公开(公告)日：2018-07-10

申请号：US15397985

申请日：2017-01-04

Applicant: SOLiD, INC.

Inventor： Sejun Na

IPC: H04B7/15 ,  H04B7/155 ,  H05K5/00

CPC classification number: H04B7/155 ,  H05K5/0021

Abstract: A communication module assembly includes a case; a communication module accommodated in the case and including at least two module terminals; and a connection member including connection terminals respectively connected to the module terminals, and a bridge unit configured to connect the connection terminals, wherein when the connection terminals and the module terminals are disconnected, the connection terminals are electrically connected to each other through the bridge unit.