公开(公告)号：US10805021B2

公开(公告)日：2020-10-13

申请号：US16529929

申请日：2019-08-02

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Minkyu Sung ,  Joonyoung Kim ,  Jong Hyun Lee ,  Seung-Hyun Cho

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

摘要： 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：US10560196B2

公开(公告)日：2020-02-11

申请号：US16197793

申请日：2018-11-21

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Joonyoung Kim ,  Minkyu Sung ,  Jong Hyun Lee ,  Seung-Hyun Cho

IPC分类号： H04B10/58 ,  H04B10/516 ,  H04B10/2575 ,  H04B10/60

摘要： 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.

公开(公告)号：US10673524B2

公开(公告)日：2020-06-02

申请号：US16190905

申请日：2018-11-14

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Seung-Hyun Cho ,  Joonyoung Kim ,  Minkyu Sung ,  Jong Hyun Lee

IPC分类号： H04B10/00 ,  H04B10/08 ,  H04B17/00 ,  H04B10/06 ,  H04B10/079 ,  H04B10/29 ,  H04W24/08 ,  H04J14/02 ,  H04B10/2575 ,  H04W88/08

摘要： An optical repeater performs an electrical-to-optical conversion based on a power level of an optical signal or an optical modulation index (OMI) required by a radio unit or a host unit connected to the optical repeater. Further, the optical repeater performs an optical-to-electrical conversion based on a power level of a radio frequency (RF) signal required by the radio unit or the host unit connected to the optical repeater.