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公开(公告)号：US20200169273A1
公开(公告)日：2020-05-28
申请号：US16553445
申请日：2019-08-28
Inventor： Sang Rok MOON , Hun Sik KANG
Abstract: A method and apparatus for estimating a burst error. A burst error estimation method includes measuring a frequency of a spectrum null for an optical signal received through an optical receiver; determining whether the measured frequency of the spectrum null corresponds to an intermediate frequency of a baud rate; and estimating that a burst error occurrence condition is met when the frequency of the spectrum null is determined to correspond to the intermediate frequency of the baud rate.
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12.发明申请公开(公告)号：US20190319708A1
公开(公告)日：2019-10-17
申请号：US16207287
申请日：2018-12-03
Inventor： Hun Sik KANG , Sang Rok MOON , Seung-Woo LEE , Sun Hyok CHANG , In Ki HWANG
IPC: H04B10/2513 , H04B10/54 , H04B10/079
Abstract: A method and apparatus for compensation of a chromatic dispersion through an optical compensation and an electronical compensation in optical communication. An optical communication method receives an optical signal, estimates a first transmission length based on a null component included in a frequency spectrum of the optical signal, optically compensates for a chromatic dispersion of the optical signal based on the first transmission length, estimates a second transmission length based on a null component included in a frequency spectrum of the compensated optical signal, and electronically compensates for a residual chromatic dispersion of the compensated optical signal based on the second transmission length.
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公开(公告)号：US20190222352A1
公开(公告)日：2019-07-18
申请号：US16112628
申请日：2018-08-24
Inventor： Sang Rok MOON , Hun Sik KANG
CPC classification number: H04L1/0047 , G06N20/00 , H03M13/3927 , H04B10/50 , H04B10/67 , H04L1/0076
Abstract: Disclosed is an optical receiver and an error correction method performed by the optical receiver, receiving, using a receiving antenna or a photodetector, a training signal in which an error occurs due to noise and distortion while being output from an optical transmitter and transmitted through a communication channel and identifying a hyperplane for classifying a probability that the received training signal is a training signal corresponding to a training signal output from the optical signal using a support vector machine (SVM) and learning a parameter of the identified hyperplane such that a classification error probability is minimized when the probability is extracted using the identified hyperplane, wherein the parameter of the identified hyperplane is used to correct an error occurring while a transmission signal output from the optical signal is received using the receiving antenna or the photodetector.
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14.发明申请OPTICAL FIBER CABLE MONITORING APPARATUS AND OPTICAL FIBER CABLE MONITORING METHOD USING DUAL LIGHT SOURCE 审中-公开光纤电缆监测装置和光纤电缆监测方法采用双光源公开(公告)号：US20160238483A1
公开(公告)日：2016-08-18
申请号：US15042670
申请日：2016-02-12
Inventor： Seung IL MYONG , Jyung Chan LEE , Hun Sik KANG , Jong Hyun LEE
CPC classification number: G01M11/3154 , G02B6/293 , G02B6/4246
Abstract: Disclosed is an optical fiber cable monitoring apparatus using a dual light source. The optical fiber cable monitoring apparatus includes: an optical transmitter configured to comprise a first light source and a second light source, which output light of different wavelengths, and to operate the first light source and the second light source to propagate first probe light and second probe light to an optical fiber cable; and an optical receiver configured to comprise a first light receiving module and a second light receiving module, each receiving first reflected light and second reflected light which are reflected from the optical fiber cable.
Abstract translation: 公开了使用双光源的光纤电缆监视装置。 光纤电缆监视装置包括：光发射器，被配置为包括输出不同波长的光的第一光源和第二光源，并且操作第一光源和第二光源以传播第一探测光和第二光源 探测光线到光缆; 以及光接收器，被配置为包括第一光接收模块和第二光接收模块，每个接收模块接收从光纤电缆反射的第一反射光和第二反射光。
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15.发明申请METHOD AND APPARATUS FOR TRANSMITTING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SIGNAL IN OPTICAL NETWORK 审中-公开在光网络中发射正交频分多址（OFDM）信号的方法和装置公开(公告)号：US20160087750A1
公开(公告)日：2016-03-24
申请号：US14862588
申请日：2015-09-23
Inventor： Hun Sik KANG , Kyeong Hwan DOO , Seung Hyun CHO
CPC classification number: H04J14/0298 , H04L27/2602 , H04L27/2613 , H04L27/2655 , H04L27/2697
Abstract: A method for transmitting an orthogonal frequency division multiplexing (OFDM) signal in an optical network and apparatus therefor are provided. The method includes: converting a media access control (MAC) frame into an OFDM frame that contains a physical (PHY) level preamble, using the MAC frame which is transmitted from a MAC layer in a passive optical network (PON) to a PHY layer in an OFDM-PON; and transmitting the generated OFDM frame.
Abstract translation: 提供一种用于在光网络中发送正交频分复用（OFDM）信号的方法及其装置。 该方法包括：使用从无源光网络（PON）中的MAC层发送到PHY层的MAC帧将媒体接入控制（MAC）帧转换成包含物理（PHY）级前导码的OFDM帧 在OFDM-PON中; 以及发送所生成的OFDM帧。
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Patent Agency Ranking
公开(公告)号：US20240291572A1
公开(公告)日：2024-08-29
申请号：US18589400
申请日：2024-02-27
Inventor： Sang Rok MOON , Hun Sik KANG
CPC classification number: H04B10/64 , H04B10/6151
Abstract: Provided is an operation method of a coherent optical reception system. The operation method includes the following configurations. A coherent optical receiver configured to receive light from at least two light sources; a local oscillator (LO) configured to transmit first LO light to the coherent optical receiver, and a polarization controller configured to transmit a signal for polarization control to the LO, wherein the polarization controller is configured to transmit a first control signal to the LO on the basis of a first reception signal, and the LO is configured to transmit second LO light to the coherent optical receiver on the basis of the first control signal.
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公开(公告)号：US20240146419A1
公开(公告)日：2024-05-02
申请号：US18111016
申请日：2023-02-17
Inventor： Sunghyun BAE , Sang Rok MOON , Hun Sik KANG
CPC classification number: H04B10/503 , H04B10/61
Abstract: An optical transmitter, an optical receiver, a method of operating the optical transmitter, and a method of operating the optical receiver are provided. The optical transmitter includes a light source configured to output laser light, an intensity modulator configured to provide a pulse signal with a predetermined period using the laser light, an in-phase and quadrature (I/Q) modulator configured to generate a coherent modulated signal applying an I/Q signal to the pulse signal with the predetermined period, and a polarization controller configured to delay one of polarization components forming the coherent modulated signal.
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18.发明公开公开(公告)号：US20230283369A1
公开(公告)日：2023-09-07
申请号：US17989844
申请日：2022-11-18
Inventor： Jung-yeol OH , Hun Sik KANG , Sang Rok MOON
IPC: H04B10/079
CPC classification number: H04B10/07951
Abstract: Provided are a method and apparatus for registering a new terminal using chromatic dispersion distance estimation. The method of registering a new terminal, performed by a transport unit (TU), includes performing frame synchronization through a downstream packet received from a transport node (TN), identifying a position of a frequency of a spectral null and a number of frequencies of spectral nulls through analysis on a frequency spectrum of the received downstream packet, estimating a transmission distance of an optical fiber to the TN, based on the identified position of the frequency of the spectral null and the identified number of frequencies of spectral nulls, and determining a timing of transmitting a registration request message, based on the estimated transmission distance, where the discovery information message is received from the TN.
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公开(公告)号：US20190165867A1
公开(公告)日：2019-05-30
申请号：US16014166
申请日：2018-06-21
Inventor： Sun Hyok CHANG , Hun Sik KANG , Joon Ki LEE , Jie Hyun LEE
IPC: H04B10/61 , H04B10/40 , H04B10/524 , H04B10/2507 , H04B10/27 , H04B10/516 , H04B10/564 , H04L1/00
Abstract: An optical receiver and a method of controlling the optical receiver. The method may include setting, by a controller, a dispersion value of a dispersion compensator to compensate for a dispersion of an optical signal received through an optical fiber, compensating, by the dispersion compensator, for the dispersion of the optical signal based on the set dispersion value, performing, by the controller, an error correction with respect to the optical signal of which the dispersion is compensated and verifying a number of bit errors, and resetting, by the controller, the dispersion value of the dispersion compensator based on the verified number of bit errors.
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20.发明申请OPTICAL TRANSMISSION AND RECEPTION APPARATUS AND METHOD FOR UPLINK TRANSMISSION IN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS-PASSIVE OPTICAL NETWORK (OFDMA-PON) 审中-公开正交频分多址无源光网络（OFDMA-PON）中的上行链路传输的光传输和接收装置及方法公开(公告)号：US20150326321A1
公开(公告)日：2015-11-12
申请号：US14698025
申请日：2015-04-28
Inventor： Seung Hyun CHO , Kyeong Hwan DOO , Hun Sik KANG , Jie Hyun LEE
IPC: H04B10/556 , H04L27/26
CPC classification number: H04B10/556 , H04B10/272 , H04B10/548 , H04L27/2626 , H04L27/2627
Abstract: Provided is an optical transmission apparatus and method for uplink transmission in an orthogonal frequency division multiple access-passive optical network (OFDMA-PON), wherein the optical transmission apparatus includes a digital signal processor to output a baseband orthogonal frequency division multiplexing (OFDM) signal, a tone generator to generate a dithering tone, a synthesizer to synthesize the dithering tone and the baseband OFDM signal, and an optical source to output an output light in which a spectrum width is increased to be greater than a spectrum width of a carrier light based on the baseband OFMD signal synthesized with the dithering tone.
Abstract translation: 提供了一种在正交频分多址无源光网络（OFDMA-PON）中的上行链路传输的光传输装置和方法，其中光传输装置包括数字信号处理器，用于输出基带正交频分复用（OFDM）信号 ，产生抖动音的乐音发生器，用于合成抖动音的合成器和基带OFDM信号;以及光源，用于将频谱宽度增加的输出光输出为大于载波的频谱宽度 基于用抖动音合成的基带OFMD信号。
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