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公开(公告)号：US20200044756A1
公开(公告)日：2020-02-06
申请号：US16529929
申请日：2019-08-02
Inventor： Minkyu SUNG , Joonyoung KIM , Jong Hyun LEE , Seung-Hyun CHO
IPC: H04B17/336 , H04B10/114 , H04B10/079 , H04B10/2575
Abstract: 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.
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2.发明申请公开(公告)号：US20190165866A1
公开(公告)日：2019-05-30
申请号：US16197793
申请日：2018-11-21
Inventor： Joonyoung KIM , Minkyu SUNG , Jong Hyun LEE , Seung-Hyun CHO
IPC: H04B10/58 , H04B10/516
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20220021455A1
公开(公告)日：2022-01-20
申请号：US17374466
申请日：2021-07-13
Inventor： Joonyoung KIM , Eon-sang KIM , Minkyu SUNG , Jong Hyun LEE , Seung-Hyun CHO
IPC: H04B10/2575 , H04B10/50
Abstract: Disclosed is a radio-frequency-over-fiber (RFoF) transmission method using a directly modulated laser (DML). The RFoF transmission method to be performed by a head end includes combining a radio frequency (RF) carrier signal and a data signal having a lower frequency band than the RF carrier signal through an RF coupler, modulating the combined RF carrier signal and the combined data signal using a frequency response characteristic of a DML, and outputting an optical signal in which, of RF carrier signals and data signals being generated in a laterally symmetrical form based on an optical carrier frequency through the modulating, an RF carrier signal is suppressed.
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公开(公告)号：US20190165858A1
公开(公告)日：2019-05-30
申请号：US16190905
申请日：2018-11-14
Inventor： Seung-Hyun CHO , Joonyoung KIM , Minkyu SUNG , Jong Hyun LEE
IPC: H04B10/079 , H04B10/29 , H04J14/02 , H04W24/08
Abstract: 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.
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公开(公告)号：US20210336715A1
公开(公告)日：2021-10-28
申请号：US17230143
申请日：2021-04-14
Inventor： Eon-Sang KIM , Joonyoung KIM , Minkyu SUNG , Jong Hyun LEE , Seung-Hyun CHO
Abstract: Provided is an optical transmitting and receiving system. The optical transmitting and receiving system may include: a Main Hub Unit (MHU) configured to perform wavelength division multiplexing on a plurality of downlink signals using a plurality of wavelengths and transmit the multiplexed downlink signal through a first optical cable; a first Remote Optical Unit (ROU) configured to perform demultiplexing on the multiplexed downlink signal received from the MHU and output a part of the plurality of downlink signals; and a second ROU configured to perform demultiplexing on the multiplexed downlink signal and output other part of the plurality of downlink signals.
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公开(公告)号：US20210258778A1
公开(公告)日：2021-08-19
申请号：US17123588
申请日：2020-12-16
Inventor： Joonyoung KIM , Sang Rok MOON , Heuk PARK , Minkyu SUNG , Seung-Hyun CHO
IPC: H04W12/033 , G06N3/04 , G06N3/08 , G06N20/20
Abstract: A secure communication method and an apparatus performing the same are disclosed. The communication method includes receiving a signal encrypted based on at least one attractor and decrypting a security signal received using a neural network trained based on a training signal.
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公开(公告)号：US20210152251A1
公开(公告)日：2021-05-20
申请号：US17097212
申请日：2020-11-13
Inventor： Sang Rok MOON , Joonyoung KIM , Sun Hyok CHANG
IPC: H04B10/50 , H04B10/572 , H01S3/30 , H01S3/067
Abstract: A wireless signal transmitter and a wireless signal receiver are provided. The wireless signal transmitter includes an optical signal generation region that generates excitation light by beating two optical signals that have different wavelengths and that are output through different laser diodes, and a wireless signal generation region that modulates the excitation light output from the optical signal generation region into a wireless signal with a carrier frequency of a terahertz band, using a photomixer. The optical signal generation region and the wireless signal generation region may be connected by a multimode optical fiber to reduce a nonlinear effect occurring in an optical fiber. Also, the wireless signal receiver includes a signal processor, for example, an equalizer, for compensating for a modal dispersion, and may compensate for a modal dispersion caused by the multimode optical fiber used in the wireless signal transmitter.
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