公开(公告)号：US10951320B2

公开(公告)日：2021-03-16

申请号：US16599357

申请日：2019-10-11

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joon Young Kim ,  Min Kyu Sung ,  Jong Hyun Lee ,  Seung Hyun Cho

IPC: H04B10/50 ,  H04B7/04 ,  H04B10/2575

Abstract: An apparatus for generating a broadband single-sideband signal based on a laser diode includes a first optical coupler configured to receive an optical carrier signal to divide the optical carrier signal into signals corresponding to a plurality of paths, a hybrid coupler configured to perform Hilbert transform on a radio frequency (RF) signal, a first slave laser and a second slave laser each configured to modulate optical output powers of the divided optical carrier signals by using a Hilbert-transformed RF signal, and a second optical coupler configured to receive an optical output power-modulated optical carrier signal to output a single-sideband signal.

公开(公告)号：US10090928B2

公开(公告)日：2018-10-02

申请号：US15378194

申请日：2016-12-14

Applicant: Electronics and Telecommunications Research Institute

Inventor： Min Kyu Sung ,  Jong Hyun Lee ,  Hwan Seok Chung ,  Seung Hyun Cho ,  Chan Gyo Han

IPC: H04B10/00 ,  H04B10/2513 ,  H04B10/2575

Abstract: Provided is an analog optical transmission system using a dispersion management technique. The analog optical transmission system may include a digital unit (DU) pool including a plurality of DUs to transmit an optical signal; a plurality of radio units (RUs) to receive the optical signal; and one or more dispersion management apparatus to remove a signal distortion component caused by an interaction between a chirp and chromatic dispersion by compensating for the chromatic dispersion before the plurality of RUs receives the optical signal that is transmitted from the DU pool.

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.

公开(公告)号：US09998222B2

公开(公告)日：2018-06-12

申请号：US15245315

申请日：2016-08-24

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Chan Gyo Han ,  Min Kyu Sung ,  Jong Hyun Lee ,  Hwan Seok Chung ,  Seung Hyun Cho

IPC: H04B10/2513 ,  H04J1/02 ,  H04J14/02

CPC classification number: H04B10/2513 ,  H04B10/25753 ,  H04B10/548 ,  H04J1/02 ,  H04J14/0227

Abstract: An optical signal transmission system and method of allocating center frequencies of intermediate frequency (IF) carriers in a frequency division multiplexing (FDM) optical fiber link. The optical signal transmission method includes determining a center frequency interval between modulated signals based on a bandwidth of the modulated signals or a center frequency of a modulated signal having a lowest center frequency, among the modulated signals, reallocating center frequencies to the modulated signals based on the center frequency interval between the modulated signals, and converting the modulated signals reallocated the center frequencies from electrical signal into optical signal and transmitting the optical signal.