公开(公告)号：US11032009B1

公开(公告)日：2021-06-08

申请号：US16937506

申请日：2020-07-23

Applicant: LG ELECTRONICS INC. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hojae Lee ,  Sangrim Lee ,  Kyungmin Woo ,  Hoon Kim

IPC: H04B10/00 ,  H04B10/516 ,  H04B10/11 ,  H04B10/60 ,  H04W88/08 ,  H04W88/02

Abstract: Disclosed herein is a method of transmitting a signal of a user equipment (UE) in a wireless communication system. The method includes generating an optical signal related to data transmission, combining an electrical signal for the data with the optical signal, and transmitting a combined signal.

公开(公告)号：US09819417B2

公开(公告)日：2017-11-14

申请号：US14993508

申请日：2016-01-12

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Yun Chur Chung ,  Hyun Kyu Shim ,  Hoon Kim

IPC: H04B10/516 ,  H04J14/02 ,  H04B10/54

CPC classification number: H04B10/5162 ,  H04B10/5167 ,  H04B10/541 ,  H04J14/0282

Abstract: The present invention can operate a reflective semiconductor optical amplifier at ultrahigh speed using a polar return-to-zero (RZ) modulation method, and operate a reflective semiconductor optical amplifier (RSOA) whose modulation bandwidth is limited at ultrahigh speed by generating signals vertically symmetrical using a newly suggested polar RZ signal generator when generating an amplitude modulation signal at a transmission end. The present invention can overcome the problem that a modulation speed cannot be increased to 10 Gb/s or above due to signal distortion by inter-symbol-interference when generating an ultrahigh speed amplitude modulation signal using an RSOA of low price having a very narrow modulation bandwidth in an RSOA-based optical network. Also, the present invention has an effect of receiving the generated amplitude modulation signal through a direct detection receiver which is cost-effective and simple, and further has an effect of enabling ultrahigh speed operation of the RSOA-based WDM PON.

公开(公告)号：US10965380B1

公开(公告)日：2021-03-30

申请号：US16924725

申请日：2020-07-09

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hoon Kim ,  Yukui Yu

IPC: H04B10/2543 ,  H04B10/61 ,  H04B10/69 ,  H04B10/255 ,  H04B10/2557 ,  H04B10/2563 ,  H04B10/60 ,  H04B10/50 ,  H04B10/2507

Abstract: Various example embodiments relate to an apparatus and method for nonlinear equalization based on an absolute operation, and may be configured to generate coefficients and compensate for nonlinear distortions by using an absolute operation for an input signal based the coefficients.