公开(公告)号：US20170244486A1

公开(公告)日：2017-08-24

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

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.

公开(公告)号：US20170250753A1

公开(公告)日：2017-08-31

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: H04B10/2513 ,  H04B10/2575

CPC classification number: H04B10/25133 ,  H04B10/25753 ,  H04B10/25754

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.