公开(公告)号：US20230318890A1

公开(公告)日：2023-10-05

申请号：US18111275

申请日：2023-02-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Won Kyoung LEE ,  Sang Rok MOON ,  Joon Ki LEE ,  Seung-Hyun CHO

IPC: H04L27/20 ,  H04L7/00

CPC classification number: H04L27/20 ,  H04L7/0008

Abstract: A method and apparatus for compensating an in- and quadrature-(IQ) imbalance are disclosed. The method and apparatus for compensating an in- and quadrature-(IQ) imbalance provide a technique for compensating a signal distortion caused by imperfect element features and various noises on a transmission link in terahertz wireless communication and improving transmission performance.

公开(公告)号：US20230269002A1

公开(公告)日：2023-08-24

申请号：US18106640

申请日：2023-02-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sang Rok MOON ,  Eon-sang KIM ,  Minkyu SUNG ,  Seung-Hyun CHO

IPC: H04B10/516 ,  H04B10/079 ,  H04Q11/00

CPC classification number: H04B10/516 ,  H04B10/07955 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0009

Abstract: An apparatus and method for maintaining a wavelength interval of light sources are disclosed. The apparatus for maintaining a wavelength interval of light sources includes: a plurality of light sources configured to output light having different wavelengths and having a certain wavelength interval; a light reception unit configured to receive an optical signal in which at least some of the output light of each of the plurality of light sources is combined and output an electrical signal including a frequency component corresponding to the certain wavelength interval; and a controller configured to detect the frequency component corresponding to the certain wavelength interval from the electrical signal and control a wavelength of each of the plurality of light sources to maintain the certain wavelength interval based on the detected frequency component.

公开(公告)号：US20220311591A1

公开(公告)日：2022-09-29

申请号：US17698600

申请日：2022-03-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Minkyu SUNG ,  Eon-sang KIM ,  Sang Rok MOON ,  Seung-Hyun CHO

IPC: H04L7/00

Abstract: Provided are a Kramers—Kronig (KK) reception-based terahertz (THz) signal reception apparatus and a method for compensating a frequency offset using the same. A method of compensating for a frequency offset performed by a THz signal reception apparatus includes receiving, from a THz signal transmission apparatus, a THz signal including carrier signals corresponding to three different frequency bands, extracting, from the received THz signal, a reference carrier included in the THz signal or a sampling clock generated in a process of generating a data signal, and compensating for a frequency offset generated in a process of transmitting the THz signal by using the extracted reference carrier or sampling clock.

公开(公告)号：US20240094121A1

公开(公告)日：2024-03-21

申请号：US18307715

申请日：2023-04-26

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Won Kyoung LEE ,  Eon-sang KIM ,  Sang Rok MOON ,  Joon Ki LEE ,  Seung-Hyun CHO

IPC: G01N21/3581 ,  G01N21/3577

CPC classification number: G01N21/3581 ,  G01N21/3577 ,  A61B5/0507

Abstract: A method of detecting a biomolecule, a computing device performing the method, and a biomolecule detection system therefor are provided. The method includes receiving a terahertz signal that passed deionized water or reference material, receiving a terahertz signal that passed a target including a predetermined biomolecule, extracting a digital modulation characteristic for the received terahertz signal that passed the deionized water and the received terahertz signal that passed the target, and detecting the predetermined biomolecule included in the target by analyzing the extracted digital modulation characteristic, wherein the received terahertz signal that passed the deionized water and the received terahertz signal that passed the target are generated using a digitally modulated optical signal based on a transmission speed determined based on kinematics of the predetermined biomolecule.

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：US20210258778A1

公开(公告)日：2021-08-19

申请号：US17123588

申请日：2020-12-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joonyoung KIM ,  Sang Rok MOON ,  Heuk PARK ,  Minkyu SUNG ,  Seung-Hyun CHO

IPC: H04W12/033 ,  G06N3/04 ,  G06N3/08 ,  G06N20/20

Abstract: A secure communication method and an apparatus performing the same are disclosed. The communication method includes receiving a signal encrypted based on at least one attractor and decrypting a security signal received using a neural network trained based on a training signal.

公开(公告)号：US20240291572A1

公开(公告)日：2024-08-29

申请号：US18589400

申请日：2024-02-27

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sang Rok MOON ,  Hun Sik KANG

IPC: H04B10/64 ,  H04B10/61

CPC classification number: H04B10/64 ,  H04B10/6151

Abstract: Provided is an operation method of a coherent optical reception system. The operation method includes the following configurations. A coherent optical receiver configured to receive light from at least two light sources; a local oscillator (LO) configured to transmit first LO light to the coherent optical receiver, and a polarization controller configured to transmit a signal for polarization control to the LO, wherein the polarization controller is configured to transmit a first control signal to the LO on the basis of a first reception signal, and the LO is configured to transmit second LO light to the coherent optical receiver on the basis of the first control signal.

公开(公告)号：US20240146419A1

公开(公告)日：2024-05-02

申请号：US18111016

申请日：2023-02-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sunghyun BAE ,  Sang Rok MOON ,  Hun Sik KANG

IPC: H04B10/50 ,  H04B10/61

CPC classification number: H04B10/503 ,  H04B10/61

Abstract: An optical transmitter, an optical receiver, a method of operating the optical transmitter, and a method of operating the optical receiver are provided. The optical transmitter includes a light source configured to output laser light, an intensity modulator configured to provide a pulse signal with a predetermined period using the laser light, an in-phase and quadrature (I/Q) modulator configured to generate a coherent modulated signal applying an I/Q signal to the pulse signal with the predetermined period, and a polarization controller configured to delay one of polarization components forming the coherent modulated signal.

公开(公告)号：US20230283369A1

公开(公告)日：2023-09-07

申请号：US17989844

申请日：2022-11-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jung-yeol OH ,  Hun Sik KANG ,  Sang Rok MOON

IPC: H04B10/079

CPC classification number: H04B10/07951

Abstract: Provided are a method and apparatus for registering a new terminal using chromatic dispersion distance estimation. The method of registering a new terminal, performed by a transport unit (TU), includes performing frame synchronization through a downstream packet received from a transport node (TN), identifying a position of a frequency of a spectral null and a number of frequencies of spectral nulls through analysis on a frequency spectrum of the received downstream packet, estimating a transmission distance of an optical fiber to the TN, based on the identified position of the frequency of the spectral null and the identified number of frequencies of spectral nulls, and determining a timing of transmitting a registration request message, based on the estimated transmission distance, where the discovery information message is received from the TN.

公开(公告)号：US20240283490A1

公开(公告)日：2024-08-22

申请号：US18582486

申请日：2024-02-20

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sang Rok MOON ,  Soo Yeon KIM ,  Eon Sang KIM ,  Min Kyu Sung ,  Seung Hyun CHO

IPC: H04B7/04 ,  H01Q3/16

CPC classification number: H04B7/04013 ,  H01Q3/16

Abstract: According to an embodiment of the present disclosure, a reconfigurable reflector combined with an amplifier for wireless communication, comprising: an amplification module; a controller configured to control the reconfigurable reflector; and the reconfigurable reflector configured to reflect an output beam of the amplification module, wherein the amplification module includes, a first antenna configured to receive a beam and transmit the beam to an amplifier, an amplifier configured to amplify the input beam and transmit the amplified beam to a second antenna, and the second antenna configured to receive the amplified beam and transmit the amplified beam to the reconfigurable reflector, and an output of the second antenna is output to a predetermined position of the reconfigurable reflector.