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：US20200044756A1

公开(公告)日：2020-02-06

申请号：US16529929

申请日：2019-08-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Minkyu SUNG ,  Joonyoung KIM ,  Jong Hyun LEE ,  Seung-Hyun CHO

IPC: H04B17/336 ,  H04B10/114 ,  H04B10/079 ,  H04B10/2575

Abstract: A transmission performance monitoring method for monitoring a transmission performance based on an analog optical link and an apparatus performing the method. The transmission performance monitoring method and apparatus centrally monitor an RF signal transmission performance in an analog optical link-based mobile haul or indoor distributed antenna system.

公开(公告)号：US20190165866A1

公开(公告)日：2019-05-30

申请号：US16197793

申请日：2018-11-21

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joonyoung KIM ,  Minkyu SUNG ,  Jong Hyun LEE ,  Seung-Hyun CHO

IPC: H04B10/58 ,  H04B10/516

Abstract: A method and apparatus for adjusting a modulation index of an analog optical signal using an interference phenomenon of a coherent light, the method including dividing an analog optical signal for a first path and a second path, extracting an optical carrier from an analog optical signal divided for the first path, controlling an intensity and a phase of the optical carrier, and controlling a modulation index of the analog optical signal by combining an analog optical signal divided for the second path and the optical carrier of which the intensity and the phase are controlled.