公开(公告)号：US10334663B2

公开(公告)日：2019-06-25

申请号：US15785921

申请日：2017-10-17

Applicant: SOLiD, INC.

Inventor： Hwansun Lee

IPC: H04W88/08 ,  H04B1/00 ,  H04B1/40 ,  H04B1/3888

Abstract: A signal processing device according to an exemplary embodiment of the inventive concept can integrate a power amplifier, a duplexer, and a linearizer as a module to improve the convenience of management and to improve flexibility and extensibility so as to be transformable corresponding to a change in system development concept.

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.

公开(公告)号：US20190056290A1

公开(公告)日：2019-02-21

申请号：US16166381

申请日：2018-10-22

Applicant: SOLiD, INC.

Inventor： Kee-Woon NA

IPC: G01M11/00 ,  H04B10/50 ,  H04B10/071 ,  H04B10/07 ,  H01S5/14 ,  H01S5/0687 ,  H01S5/00

CPC classification number: G01M11/3127 ,  H01S5/0064 ,  H01S5/0687 ,  H01S5/146 ,  H04B10/07 ,  H04B10/071 ,  H04B10/503

Abstract: The present invention relates to an optical time domain reflectometer using, as a optical source, a polymer wavelength tunable laser which tunes the wavelength of an optical signal by using polymer grating. The optical time domain reflectometer of the present invention tunes the wavelength of a polymer wavelength tunable laser that outputs a constant optical signal and inspects cutting, reflection, and damage of an optical line by separating an optical signal returning from the optical line by an optical filter having a specific central wavelength. Since a optical source having a constant light intensity is used, the present invention has an effect of reducing the nonlinear effect generated in an optical line.

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.

公开(公告)号：US20190052235A1

公开(公告)日：2019-02-14

申请号：US16077917

申请日：2016-03-28

Applicant: SOLiD, INC.

Inventor： Kwang Nam SEO ,  Do Yoon KIM ,  Hyoung Ho KIM

IPC: H03F1/32 ,  H03F3/24 ,  H03F3/19 ,  H04B1/04

Abstract: The present invention, which relates to a multi-path communication device for sharing a feedback path for digital pre-distortion, includes: a DPD processing unit configured to output a plurality of pre-distorted signals by respectively pre-distorting a plurality of input signals, to output an nth control signal when an nth input signal is input, and to output an nth pre-distorted signal using an nth feedback signal input in response to the nth control signal; a power amplifying unit configured to amplify each of the plurality of pre-distorted signals and output a plurality of amplified signals; a signal combining unit configured to combine some of each of the plurality of amplified signals and output combined feedback signal; and a signal selection unit configured to select and output only the nth feedback signal from the combined feedback signal according to the input nth control signal, thereby preventing an increase in the size of a device and manufacturing cost thereof caused by a plurality of DPD feedback paths.

公开(公告)号：US10200157B2

公开(公告)日：2019-02-05

申请号：US15091912

申请日：2016-04-06

Applicant: SOLiD Inc.

Inventor： Young Man Cho

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

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：US20190013882A1

公开(公告)日：2019-01-10

申请号：US16127591

申请日：2018-09-11

Applicant: SOLiD, INC.

Inventor： Youngju YOU

IPC: H04B17/16 ,  H04B1/04

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：US10153588B2

公开(公告)日：2018-12-11

申请号：US15715565

申请日：2017-09-26

Applicant: SOLiD, INC.

Inventor： Dong Won Lee ,  So Yeon Won

IPC: H01R13/631 ,  H04Q1/02 ,  H01R25/16 ,  H04Q1/06 ,  H01R9/26

Abstract: The present invention relates to a communication module assembly. The present invention is a communication module assembly which is electrically connected to a communication device and is supplied with power and signal, and can include a connection port unit that is supplied with the power and the signal from the communication device; a cable connection portion which is provided in the connection port unit, and to which cables electrically connected to the communication device is connected; a plurality of communication modules that is stacked on and connected to the connection port unit in a plug-in type; and a guide for guiding the communication module such that the communication modules are connected to the connection port unit in a central direction.

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

IPC: H04L25/02 ,  H04L27/26

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).

公开(公告)号：US10079622B2

公开(公告)日：2018-09-18

申请号：US14411484

申请日：2014-07-18

Applicant: SOLID, INC.

Inventor： Yong Ki Cho

IPC: H04B7/02 ,  H04B7/024 ,  H04W72/04 ,  H04L5/00

CPC classification number: H04B7/024 ,  H04L5/0048 ,  H04L69/22 ,  H04W72/0406

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.