公开(公告)号：US20240187105A1

公开(公告)日：2024-06-06

申请号：US18238259

申请日：2023-08-25

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jung-yeol OH ,  Hun Sik KANG

IPC: H04B10/61 ,  H04B10/532

CPC classification number: H04B10/6162 ,  H04B10/532

Abstract: Provided is a coherent optical communication system including a coherent optical transmitter and a coherent optical receiver, and more particularly, when a polarization time block code is used, the complexity for performing a polarization time block decoding scheme of the coherent optical receiver is minimized.

公开(公告)号：US20150323419A1

公开(公告)日：2015-11-12

申请号：US14682416

申请日：2015-04-09

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  TELACE, INC.

Inventor： Seung Il MYONG ,  Jyung Chan LEE ,  Hun Sik KANG ,  Won Kyoung LEE ,  Jin Hee HAN

IPC: G01M11/00

CPC classification number: G01M11/3145 ,  G01M11/31 ,  H04B10/071

Abstract: Provided is an apparatus and a method for partial monitoring of an optical fiber, wherein the optical fiber monitoring apparatus includes a monitoring light transmitter to continuously output a monitoring light to the optical fiber based on a number of measuring time sections generated by dividing an optical fiber monitoring time section, a monitoring light receiver to receive a monitoring light fed back from the optical fiber, measure a monitoring light received based on different measuring time sections for each monitoring light, and store a result of the measuring in a storage medium, and an optical fiber monitor to monitor a status of the optical fiber based on the result of the measuring stored in the storage medium.

Abstract translation: 本发明提供了一种用于部分监视光纤的装置和方法，其中，光纤监视装置包括：监视光发射机，其基于通过对光纤进行分割而产生的多个测量时间段，连续向光纤输出监视光 监视时间部分，用于接收从光纤反馈的监视光的监视光接收器，针对每个监视光，测量基于不同测量时间段接收到的监视光，并将测量结果存储在存储介质中，以及 光纤监视器，用于基于存储在存储介质中的测量结果监视光纤的状态。

公开(公告)号：US20240297666A1

公开(公告)日：2024-09-05

申请号：US18590531

申请日：2024-02-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： In Ki HWANG ,  Hun Sik KANG ,  Joon Ki LEE

IPC: H03M13/11 ,  H03M13/00

CPC classification number: H03M13/1177 ,  H03M13/616

Abstract: Proposed are an apparatus and a method for designing codes by using polar and algebraic codes. The operating method of the apparatus for designing a code may include a step of identifying a polar code defined as at least one information set, a step of identifying a parity matrix of the polar code, a step of identifying a vector corresponding to the polar code, a step of identifying a row that is representable in a way by linearly combining each row of the parity matrix, a step of identifying a specific binarization matrix in which the representable row does not exist, a step of generating a transformed parity matrix by adding the specific binarization matrix to the parity matrix and a step of generating a pre-code corresponding to the transformed parity matrix.

公开(公告)号：US20230261756A1

公开(公告)日：2023-08-17

申请号：US18096638

申请日：2023-01-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joon Young HUH ,  Sae Kyoung KANG ,  Hun Sik KANG ,  Sang Rok MOON ,  Joon Ki LEE

IPC: H04B10/572 ,  H04B10/58

CPC classification number: H04B10/572 ,  H04B10/58

Abstract: Disclosed herein is an optical transmitter for generating a vestigial sideband (VSB) optical signal. The optical transmitter includes: a modulator configured based on a photonic integrated chip (PIC); an optical fiber block; and a lensed thin film filter implemented between the modulator configured based on the PIC and the optical fiber block. The PIC includes at least one grating coupler, and the lensed thin film filter is disposed so that an angle of an optical signal emitted from a first grating coupler of the PIC coincides with an angle of incident (AOI) of the lensed thin film filter to design the first grating coupler and the lensed thin film filter.

公开(公告)号：US20240146330A1

公开(公告)日：2024-05-02

申请号：US18113756

申请日：2023-02-24

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： In Ki HWANG ,  Hun Sik KANG ,  Joon Ki LEE

IPC: H03M13/11

CPC classification number: H03M13/1111

Abstract: Provided are a method of low-complexity decoding based on soft decision and a computing device for performing the method. The method of low-complexity decoding based on soft decision, performed by a computing device, includes receiving a vector, in which a codeword is modulated, through a channel, determining a decoding result by sequentially applying the received vector to one or more decoding algorithms, and decoding the codeword based on an analysis on the decoding result of a detector corresponding to each of the one or more decoding algorithms.

公开(公告)号：US20230299853A1

公开(公告)日：2023-09-21

申请号：US18105087

申请日：2023-02-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sun Hyok CHANG ,  Hun Sik KANG ,  In Ki HWANG ,  Seung Woo LEE

IPC: H04B10/40 ,  H04L7/00 ,  H04L7/02

CPC classification number: H04B10/40 ,  H04L7/0016 ,  H04L7/02

Abstract: Provided are a method and an apparatus for optimizing the performance of an optical transceiver, and the gist is as follows: receiving an optical input and converting the optical input into electrical signals; receiving a performance value and a reference clock of the electrical signals from a DSP part; generating a plurality of clocks by using the reference clock; determining ADC sampling timings of a plurality of ADCs on the basis of phases of the plurality of clocks applied to the plurality of ADCs; and compensating, on the basis of the determined ADC sampling timings, for differences in physical length between output signals of the plurality of ADCs.

公开(公告)号：US20160308605A1

公开(公告)日：2016-10-20

申请号：US15099157

申请日：2016-04-14

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hun Sik KANG ,  Jong Hyun LEE ,  Jyung Chan LEE ,  Seung IL MYONG

IPC: H04B10/077 ,  H04B1/00 ,  H04B10/50 ,  H04B10/67 ,  H04B10/25

CPC classification number: H04B10/071

Abstract: An apparatus and method for driving an optical source for an optical fiber link monitoring apparatus. The apparatus for driving an optical source for an optical fiber link monitoring apparatus includes a laser part configured to output probe light that corresponds to a bipolar code probe signal; an optical receiver configured to convert reflected light, which has travelled back from an optical fiber link after transmission of the bipolar probe light, into an electrical signal; and a direct-current (DC) canceller configured to remove a DC offset component from the electrical signal generated by the optical receiver.

Abstract translation: 一种用于驱动光纤链路监视装置的光源的装置和方法。 用于驱动光纤链路监视装置的光源的装置包括被配置为输出对应于双极码探测信号的探测光的激光部分; 光接收器，被配置为将在双极探测光传输之后从光纤链路返回的反射光转换成电信号; 以及直流（DC）消除器，被配置为从由光接收器产生的电信号中去除DC偏移分量。

公开(公告)号：US20160233956A1

公开(公告)日：2016-08-11

申请号：US15015628

申请日：2016-02-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hun Sik KANG ,  Jong Hyun LEE ,  Jyung Chan LEE ,  Seung Il MYONG

IPC: H04B10/079 ,  H03G3/30

CPC classification number: H03G3/3084 ,  H04B10/071

Abstract: An optical fiber link monitoring apparatus for detecting a failure in an optical fiber link by analyzing a trace of a received signal that has been transmitted to and reflected from said optical fiber link. The optical fiber link monitoring apparatus includes a variable gain amplifier (VGA), an analog/digital converter (ADC), and a controller. The VGA amplifies a gain of the received signal, for which the ADC converts the gain-amplified signal into a digital signal. The controller then analyzes a digital signal trace and adjusts the gain of the VGA according to the analysis result.

Abstract translation: 一种光纤链路监视装置，用于通过分析已经发送到所述光纤链路并从所述光纤链路反射的接收信号的轨迹来检测光纤链路中的故障。 光纤链路监视装置包括可变增益放大器（VGA），模拟/数字转换器（ADC）和控制器。 VGA放大接收信号的增益，ADC将增益放大信号转换为数字信号。 然后控制器分析数字信号迹线，并根据分析结果调整VGA的增益。

公开(公告)号：US20250055590A1

公开(公告)日：2025-02-13

申请号：US18780694

申请日：2024-07-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jung-yeol OH ,  Hun Sik KANG

IPC: H04J14/08

Abstract: Proposed is an apparatus and method of dynamic bandwidth allocation for a coherent optical communication having a variable modulation and coding scheme in an optical access network, wherein the method includes determining an index of a received signal quality (IRSQ) by measuring a received optical power (ROP) for downstream transmission, receiving a message of granting authority from a transport node (TN), transmitting a message of a buffer status report (BSR) to the TN in response to the message of grating authority, receiving from the TN a message of bandwidth allocation (BA) including an index of a modulation and coding scheme (IMCS), and determining a modulation and coding scheme (MCS) corresponding to the index of the modulation and coding scheme (IMCS) on the basis of the BA message.

公开(公告)号：US20210314003A1

公开(公告)日：2021-10-07

申请号：US17199605

申请日：2021-03-12

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seung-Woo LEE ,  Hun Sik KANG ,  In Ki HWANG

IPC: H03M13/27 ,  H03M13/11

Abstract: A deinterleaving method and a deinterleaving system performing the same are disclosed. According to an example embodiment, a data processing method includes dividing data into first data blocks of a first number of bits, performing deinterleaving on the first data blocks, and dividing deinterleaved data into second data blocks of a second number of bits and outputting the second data blocks, wherein the first number of bits is determined based on a minimum switching unit of a deinterleaving operation and the second number of bits.