公开(公告)号：US20230179272A1

公开(公告)日：2023-06-08

申请号：US18049021

申请日：2022-10-24

Applicant: SOLiD, INC. ,  INDUSTRY-UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITY

Inventor： Nagwon KWON ,  Hyunchae Kim ,  Jihoon Choi

IPC: H04B7/0456 ,  H04L5/00

CPC classification number: H04B7/0456 ,  H04L5/0098

Abstract: A communication node included in a multi-antenna multi-carrier system, when precoding matrices corresponding to some subcarriers from among subcarriers allocated to another communication node connected to the communication node are input, obtains precoding matrices for at least some subcarriers from among the allocated subcarriers by performing spherical interpolation on the input precoding matrices, maps the obtained precoding matrices for the at least some subcarriers to the subcarriers allocated to the other communication node, and performs precoding on the plurality of vector signals using the mapped precoding matrices.

公开(公告)号：US11483059B2

公开(公告)日：2022-10-25

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: H04B3/36 ,  H04B7/17 ,  H04L25/20 ,  H04L25/52 ,  H04B7/155 ,  H04L5/14 ,  H04J3/02

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：US10516766B2

公开(公告)日：2019-12-24

申请号：US15511462

申请日：2014-09-17

Applicant: SOLiD, INC.

Inventor： Hyunchae Kim

IPC: H04W72/04 ,  H04L29/06

Abstract: A base station system includes a main conversion unit configured to receive a first downlink frame conforming to a first protocol and a second downlink frame conforming to a second protocol, and configured to reconstruct the first and second downlink frames to conform to a third protocol and generate a downlink transmit frame; and a radio unit including a remote conversion unit that receives the downlink transmission frame and disassembles the received downlink transmission frame to output at least one of the first and second downlink frames.

公开(公告)号：US09954629B2

公开(公告)日：2018-04-24

申请号：US15395240

申请日：2016-12-30

Applicant: SOLiD, Inc.

Inventor： Nagwon Kwon ,  Hyunchae Kim

IPC: H04B7/04 ,  H04B17/40 ,  H04W52/24 ,  H04W52/46 ,  H04B17/309

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：US09871576B2

公开(公告)日：2018-01-16

申请号：US15391180

申请日：2016-12-27

Applicant: SOLiD, INC.

Inventor： Nagwon Kwon ,  Hyunchae Kim

IPC: H04B3/36 ,  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：US09813143B2

公开(公告)日：2017-11-07

申请号：US15391209

申请日：2016-12-27

Applicant: SOLiD, INC.

Inventor： Nagwon Kwon ,  Hyunchae Kim

IPC: H04B1/10 ,  H04B7/155

CPC classification number: H04B7/15585

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.