公开(公告)号：US20200177432A1

公开(公告)日：2020-06-04

申请号：US16638602

申请日：2019-07-05

Applicant: SOLID, INC.

Inventor： Nagwon KWON

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/04 ,  H04J11/00 ,  H04W56/00

Abstract: A synchronization detection method of a repeater comprises receiving a communication signal comprising a plurality of synchronization signal blocks respectively belonging to different frequency ranges, determining a priority of a frequency range in which the plurality of synchronization signal blocks are to be detected based on signal level for each frequency range and detecting a synchronization signal block included in each frequency range according to the determined priority.

公开(公告)号：US20170187448A1

公开(公告)日：2017-06-29

申请号：US15391180

申请日：2016-12-27

Applicant: SOLiD, INC.

Inventor： Nagwon KWON ,  Hyunchae KIM

IPC: H04B7/155

CPC classification number: H04B7/15585

Abstract: An interference cancellation repeater configured to cancel an interference signal included in an input signal, the interference cancellation repeater including: a canceller configured to generate an interference canceled signal based on the input signal and an estimated signal; a digital filter configured to filter the interference canceled signal to generate an output signal; an interference signal detector configured to generate interference signal existence interval information using the input signal and the output signal; and an adaptive filter configured to receive the interference canceled signal and the output signal, and generate the estimated signal based on the interference signal existence interval information. Information of the signal existence section

公开(公告)号：US20220271827A1

公开(公告)日：2022-08-25

申请号：US17741737

申请日：2022-05-11

Applicant: SOLiD, INC. ,  FOUNDATION OF SOONGSIL UNIVERSITY-INDUSTRY COOPERATION

Inventor： Nagwon KWON ,  Hyunchae KIM ,  Chonghoon KIM ,  Seungmo HONG ,  Sungbin IM

IPC: H04B7/155

Abstract: A method of operating a repeater comprises selecting some of adaptive filter coefficients among a plurality of adaptive filter coefficients of an adaptive filter used for interference cancellation, based on the size of a coefficient, generating a predicted interference signal using the selected adaptive filter coefficients and generating an interference-canceled communication signal from a received signal using the generated predicted interference signal.

公开(公告)号：US20210050908A1

公开(公告)日：2021-02-18

申请号：US16991512

申请日：2020-08-12

Applicant: SOLiD, INC. ,  FOUNDATION OF SOONGSIL UNIVERSITY-INDUSTRY COOPERATION

Inventor： Nagwon KWON ,  HyunChae KIM ,  Chonghoon KIM

IPC: H04B7/155 ,  H04J3/02 ,  H04L5/14

Abstract: A method of operating a TDD-based interference cancellation repeater, the method comprises setting a compensation gain of a gain compensator differently in an uplink communication period and a downlink communication period, setting an optimal coefficient of an adaptive filter in the uplink communication period and an optimal coefficient of the adaptive filter in the downlink communication period the same, based on the set compensation gain of the gain compensator and removing an interference signal in the uplink communication period or the downlink communication period according to the set optimal coefficient of the adaptive filter.

公开(公告)号：US20170195073A1

公开(公告)日：2017-07-06

申请号：US15395240

申请日：2016-12-30

Applicant: SOLiD, INC.

Inventor： Nagwon KWON ,  Hyunchae KIM

IPC: H04B17/40 ,  H04W52/24 ,  H04W52/46

CPC classification number: H04B17/40 ,  H04B7/155 ,  H04B17/309 ,  H04W52/246 ,  H04W52/46

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：US20170187561A1

公开(公告)日：2017-06-29

申请号：US15391183

申请日：2016-12-27

Applicant: SOLiD, INC.

Inventor： Nagwon KWON ,  Hyunchae KIM

IPC: H04L27/26 ,  H04B7/15 ,  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.