公开(公告)号：US20230216585A1

公开(公告)日：2023-07-06

申请号：US17775207

申请日：2020-03-03

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Yun Chur CHUNG ,  Byunggon KIM ,  Sunghyun BAE ,  Minsik KIM

IPC: H04B10/2513 ,  H04B10/516

CPC classification number: H04B10/2513 ,  H04B10/516

Abstract: Proposed are an optimal operation method of a high-frequency dithering technique for compensating for interference noise in an analog optical transmission-based mobile fronthaul network, and a transmitter using same. An interference noise compensation method using high-frequency phase dithering performed in an analog optical transmission-based mobile fronthaul network may include the steps in which: a frequency-multiplexed wireless signal is converted in an optical transmitter to an intensity-modulated optical signal; and the phase of the optical signal intensity-modulated in the optical transmitter is dithered with an Orthogonal Frequency-Division Multiplexing (OFDM) signal.

公开(公告)号：US20220278751A1

公开(公告)日：2022-09-01

申请号：US17631412

申请日：2020-02-26

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yun Chur CHUNG ,  Sunghyun BAE ,  Byunggon KIM ,  Minsik KIM

IPC: H04B10/524 ,  H04B10/2581 ,  H04B10/50 ,  H04J14/08 ,  H04L25/03

Abstract: Disclosed are an optical-time-division-multiplexed transmission method and system using a simple sinusoidally modulated optical signal as an input pulse source. An optical-time-division-multiplexed transmission system comprises: an optical-time-division-multiplexed transmitter by applying a sinusoidal electrical signal, a first multi-level electrical PAM signal, and a second multi-level electrical PAM signal so as to generate an optical-time-division-multiplexed multi-level PAM signal; an optical detector for converting the transmitted optical-time-division-multiplexed PAM signal into an electrical signal; a time-division-demultiplexer for demultiplexing the detected electrical signal into two signals; a MIMO equalizer; and two decision elements for determining the levels of two demultiplexed signals obtained from the MIMO equalizer.