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.

公开(公告)号：US20170089764A1

公开(公告)日：2017-03-30

申请号：US15274177

申请日：2016-09-23

Applicant: Korea Advanced Institute of Science And Technology

Inventor： Kwyro LEE ,  Minsik KIM ,  Seunghyun PARK

IPC: G01J5/34 ,  G01J5/06

CPC classification number: G01J5/34 ,  G01J5/061 ,  G01J5/22 ,  G01J2005/0048 ,  G01J2005/106

Abstract: Disclosed is a multi-reference correlated double sampling detection method including generating, by a plurality of unit reference cells, reference signals, receiving, by a plurality of unit active cells having absorbed an infrared signal, sensing signals, and detecting a pure infrared signal on a basis of the sensing signals and active cell values processed using the reference signals, wherein the unit reference cells do not react to the infrared signal and are configured of blind cells having identical electrical and thermal characteristics to the unit active cells. Accordingly, a self-heating effect of an active cell may be accurately cancelled out, the method is robust to common noise such as power supply noise, and fixed pattern noise occurring in a sensing circuit and including incoherence between skimming cells may be removed. Furthermore, the method may improve efficiency and greatly reduce complexity of analog and digital correction, and remove a thermo-electro cooler and shutter.

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.