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公开(公告)号：KR100745670B1
公开(公告)日：2007-08-02
申请号：KR1020040102607
申请日：2004-12-07
Applicant: 한국전자통신연구원
IPC: H04L12/28
CPC classification number: H04J14/0298 , H04B10/40 , H04J14/0226 , H04J14/0247 , H04J14/0252 , H04J14/0282
Abstract: An optical transceiver for transmitting light source control information, which is applied to a Subcarrier Multiplexing optical network, is disclosed. The optical transceiver includes a controller, an SCM frame generation/restoring unit, a modulator/demodulator, and an EO/OE converter. The controller controls transmission of light source control information or collects received light source control information. The SCM frame generation/restoring unit generates an SCM frame containing light source control information received from the controller. The modulator/demodulator modulates an SCM frame generated by the SCM frame generation/restoring unit into a signal suitable for transmission. The EO/OE converter converts a transmission signal modulated by the modulator/demodulator into an optical signal and transmits the optical signal through an optical fiber. An optical network having a telephone office OLT and subscriber ONTs, each having the optical transceiver, is also disclosed.
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公开(公告)号：KR100744564B1
公开(公告)日：2007-08-01
申请号：KR1020060080611
申请日：2006-08-24
Applicant: 한국전자통신연구원
IPC: H04B10/50 , H04B10/60 , H04B10/2581
Abstract: 본 발명은 광 가입자망에 적용할 수 있는 WDM(Wavelength Division Multiplexing)기반의 SCM(Sub-Carrier Multiplexing)-PON(Passive Optical Network)망에 사용하기 위한 기저대역(Baseband) 송수신기에 관한 것이다. 본 발명의 기저대역 송수신기는 가입자의 데이터를 기저대역 신호로 변환하기 위한 디지털 변조 및 복조 블록을 포함하며, 광 채널을 통해 기저 대역 수신기에 전송된 기저 대역 신호로부터 디지털 데이터를 복원하기 위한 수신 동기부 및 디지털 필터 블록, 채널 상에서 발생한 에러를 복원하기 위한 에러 정정 장치 등을 포함하는것을 특징으로 한다. 본 발명을 구성함으로 서비스 제공자는 WDM/SCM-PON 광 가입자망에서 각 가입자에게 고속으로 양질의 데이터 서비스를 제공할 수 있다.
WDM/SCM-PON, FTTH, 디지털 변조, 디지털 복조, 디지털 동기.-
公开(公告)号：KR1020070059910A
公开(公告)日：2007-06-12
申请号：KR1020060080611
申请日：2006-08-24
Applicant: 한국전자통신연구원
IPC: H04B10/50 , H04B10/60 , H04B10/2581
Abstract: A baseband transceiver in a WDM/SCM(Wavelength Division Multiplexing Sub-Carrier Multiplexing)-PON(Passive Optical Network) is provided to offer a high-speed data service of more than 100 Mbps to each ONT(Optical Network Terminal), to simply implement the structure of an analog transceiver by executing digital modulation and demodulation, and to secure the SNR gain of an optical Tx/Rx channel by restoring bit errors of a transmission line through an error correction encoder. A baseband transmitter in a WDM/SCM-PON consists of an error correction encoding part(402), a scrambling part(403), a digital modulation part(404), a preamble insertion part(405), a transmission filter(406), and a digital/analog conversion part(407). The error correction encoding part(402) receives data, recombines or encodes the data, and adds a certain error correction bit to the data. The scrambling part(403) scrambles output data of the error correction encoding part(402). The digital modulation part(404) converts the scrambled data into modulated symbol data based on a certain modulation scheme. The preamble insertion part(405) adds a preamble to the preamble-added modulated symbol data. The transmission filter(406) cancels interference between the modulated symbol data. The digital/analog conversion part(407) converts the interference-cancelled modulated symbol data into an analog signal and creates a baseband signal.
Abstract translation: 提供WDM / SCM（波分复用子载波复用）-PON（无源光网络）中的基带收发器，以向每个ONT（光网络终端）提供超过100Mbps的高速数据服务，简单地 通过执行数字调制和解调来实现模拟收发器的结构，并且通过通过纠错编码器恢复传输线的位错误来确保光学Tx / Rx通道的SNR增益。 WDM / SCM-PON中的基带发射机包括纠错编码部分（402），加扰部分（403），数字调制部分（404），前同步码插入部分（405），发射滤波器（406） ，和数字/模拟转换部分（407）。 纠错编码部分（402）接收数据，重新组合或编码数据，并向数据添加一定的纠错位。 加扰部分（403）加扰纠错编码部分（402）的输出数据。 数字调制部（404）根据特定的调制方式将加扰后的数据变换为调制符号数据。 前导码插入部分（405）将前置码添加调制码元数据相加。 发送滤波器（406）消除已调码元数据之间的干扰。 数字/模拟转换部分（407）将干扰消除的调制符号数据转换成模拟信号并产生基带信号。
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公开(公告)号：KR1020060063433A
公开(公告)日：2006-06-12
申请号：KR1020040102607
申请日：2004-12-07
Applicant: 한국전자통신연구원
IPC: H04L12/28
CPC classification number: H04J14/0298 , H04B10/40 , H04J14/0226 , H04J14/0247 , H04J14/0252 , H04J14/0282
Abstract: An optical transceiver for transmitting light source control information, which is applied to a Subcarrier Multiplexing optical network, is disclosed. The optical transceiver includes a controller, an SCM frame generation/restoring unit, a modulator/demodulator, and an EO/OE converter. The controller controls transmission of light source control information or collects received light source control information. The SCM frame generation/restoring unit generates an SCM frame containing light source control information received from the controller. The modulator/demodulator modulates an SCM frame generated by the SCM frame generation/restoring unit into a signal suitable for transmission. The EO/OE converter converts a transmission signal modulated by the modulator/demodulator into an optical signal and transmits the optical signal through an optical fiber. An optical network having a telephone office OLT and subscriber ONTs, each having the optical transceiver, is also disclosed.
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公开(公告)号：KR1020080053130A
公开(公告)日：2008-06-12
申请号：KR1020060125135
申请日：2006-12-08
Applicant: 한국전자통신연구원
CPC classification number: H04L27/3854 , H04L27/18 , H04L2027/0069
Abstract: An apparatus and a method for recovering a carrier in a baseband receiver of a QAM(Quadrature Amplitude Modulation) system of a high order are provided to maintain a capturing time uniformly although a carrier frequency offset increases by operating a carrier recovering device having a wide frequency recovering range and a fast capturing time. An apparatus for recovering a carrier in a baseband receiver of a QAM(Quadrature Amplitude Modulation) system of a high order includes a phase detection unit(250), a polarity detection unit(230), a frequency detection unit(240), and a fixed signal detection unit(260). The phase detection unit detects a phase offset of a baseband signal of which a phase is changed. The base band signal is received to a carrier recovering device. The polarity detection unit detects a polarity of a selected symbol used for recovering the carrier. The polarity detection unit detects a phase offset of the selected symbol based on the polarity. The frequency detection unit detects the frequency offset based on an output of the polarity detection unit. The fixed signal detection unit detects whether the phase offset and the frequency offset of the carrier are removed below a predetermined reference value. The fixed signal detection unit switches one of the output of the phase detection unit, the output of the polarity detection unit, and the output of the frequency detection unit to be used for capturing the carrier.
Abstract translation: 提供了一种用于恢复高阶QAM（正交幅度调制）系统的基带接收机中的载波的装置和方法，以便通过操作具有宽频率的载波恢复装置来增加载波频率偏移，从而保持捕获时间均匀 恢复范围和快速捕获时间。 用于恢复高阶QAM（正交幅度调制）系统的基带接收机中的载波的装置包括相位检测单元（250），极性检测单元（230），频率检测单元（240）和 固定信号检测单元（260）。 相位检测单元检测相位改变的基带信号的相位偏移。 基带信号被接收到载波恢复装置。 极性检测单元检测用于恢复载体的所选符号的极性。 极性检测单元根据极性检测所选符号的相位偏移。 频率检测单元基于极性检测单元的输出检测频率偏移。 固定信号检测单元检测载波的相位偏移和频率偏移是否被移除低于预定参考值。 固定信号检测单元切换相位检测单元的输出，极性检测单元的输出和用于捕获载波的频率检测单元的输出中的一个。
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Patent Agency Ranking
公开(公告)号：KR1020070059922A
公开(公告)日：2007-06-12
申请号：KR1020060085889
申请日：2006-09-06
Applicant: 한국전자통신연구원
CPC classification number: G06F3/05 , G06F13/385 , G06F13/4291
Abstract: A device and a method for collecting digital conversion data of an analog signal using a serial bus are provided to collect the digital data converted from the monitored analog signals through the serial bus by converting/transmitting the analog signal of the selected address or selecting, converting, and transmitting one of the monitored analog signals with a multiplexer. The multiplexer(311) receives the analog signals and outputs only one analog signal by a control signal. An ADC(Analog/Digital Converter)(313) converts the outputted analog signal into a digital signal. The first controller(315) generates/outputs the control signal to the multiplexer and controls operation of the ADC. A bus controller(319) outputs the digital signal through the serial bus(320). The first controller includes the first address setting part(316) storing a unique address of the device and an activation determiner(317) determining determines whether activation information received through the serial bus is agreed to the unique address of the device. The activation determiner activates the bus controller if the unique address is agreed and deactivates the bus controller if not.
Abstract translation: 提供使用串行总线收集模拟信号的数字转换数据的装置和方法，用于通过转换/发送所选地址的模拟信号来收集从所监视的模拟信号转换的数字数据，或者选择转换 并且用多路复用器发送所监视的模拟信号之一。 复用器（311）接收模拟信号，并通过控制信号仅输出一个模拟信号。 ADC（模拟/数字转换器）（313）将输出的模拟信号转换为数字信号。 第一控制器（315）产生/输出控制信号到多路复用器并控制ADC的操作。 总线控制器（319）通过串行总线（320）输出数字信号。 第一控制器包括存储设备的唯一地址的第一地址设置部分（316）和确定是否确定通过串行总线接收到的激活信息是否符合设备的唯一地址的激活确定器（317）。 如果同意唯一地址，激活确定器激活总线控制器，如果不是，则激活总线控制器。
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公开(公告)号：KR100570841B1
公开(公告)日：2006-04-13
申请号：KR1020040104379
申请日：2004-12-10
Applicant: 한국전자통신연구원
IPC: H04J14/00
Abstract: 본 발명은 부반송파 다중 접속 광통신망의 중앙 기지국(CO:Central office)에 적용되는 광 간섭잡음 측정장치를 제공하는데 그 목적이 있다.
본 발명의 광 간섭잡음 측정장치는, 부반송파 다중 접속 광통신망에 포함되고, 광섬유를 통해 전송되는 광신호를 전기적인 신호로 변환하는 광수신기를 포함하는 중앙 기지국에 적용되는 광 간섭잡음 측정장치에 있어서, 상기 광수신기의 출력 신호의 파워를 두 신호로 분기하는 파워 분배기(210); 상기 파워 분배기(210)에 의해 분기된 하나의 신호를 부반송파신호의 주파수 대역보다 낮은 저주파수 대역으로 통과시키는 제1 필터(220); 상기 파워 분배기(210)에 의해 분기된 다른 신호를 부반송파신호의 주파수 대역보다 높은 고주파수 대역으로 통과시키는 제2 필터(230); 및 상기 제1 필터(220) 및 제2 필터(230)에 의해 통과된 각 신호의 파워를 측정하는 파워 측정기(240)를 구비함을 특징으로 한다.
광통신, 광통신망, 부반송파 다중 접속, 광 간섭잡음Abstract translation: 本发明的一个目的是提供一种用于测量施加到子载波多路访问光通信网络的中心局（CO）的光学干扰噪声的设备。
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公开(公告)号：KR100535313B1
公开(公告)日：2005-12-09
申请号：KR1020030094374
申请日：2003-12-22
Applicant: 한국전자통신연구원
IPC: H04B10/2507 , H04B10/2575 , H04B10/2581
Abstract: 본 발명은 다채널 RF(Radio Frequency) 신호를 다중 광원을 이용해 전송하는 경우, 광신호 검출과정에서 발생하는 광신호들 간의 간섭 잡음을 감소시키기 위한 광가입자망에서 광간섭 잡음 감소를 위한 광송신 장치에 관한 것이다. 본 발명은, 광가입자망에서, 정보를 담고 있는 RF 정보신호를 빛에 실어 광수신 장치로 전송하는 광전송 장치에 있어서, 소정의 진폭과 주파수를 갖는 RF 조정신호를 생성하는 RF 조정신호 생성부와, 상기 RF 조정신호를 입력받아 상기 RF 조정신호의 주파수 및 진폭을 갖는 제1 광신호를 생성하는 제1 LD와, 상기 RF 조정신호의 위상을 π만큼 변환시키는 시간 지연부와, 상기 위상 변환된 RF 조정신호를 입력받아 상기 제1 광신호와 동일한 주파수 및 진폭을 갖고 위상이 π만큼 차이나는 제2 광신호를 생성하고, 상기 제1 광신호와 제2 광신호를 결합하여 주파수 변조된 제3 광신호를 생성하는 제2 LD 및 상기 RF 정보신호를 이용하여 상기 제3 광신호를 진폭변조한 제4 광신호를 생성하여 광수신 장치로 전송하는 변조부를 포함하는 광가입자망에서 광간섭 잡음 감� ��를 위한 광전송 장치를 제공한다. 본 발명에 따르면, 낮은 비용으로 모든 망구조에서 광간섭 잡음을 감소시킬 수 있는 효과가 있다.
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公开(公告)号：KR100889751B1
公开(公告)日：2009-03-24
申请号：KR1020070050243
申请日：2007-05-23
Applicant: 한국전자통신연구원
CPC classification number: H04J14/0226 , H04B10/0771 , H04B2210/074 , H04J14/0227 , H04J14/0238 , H04J14/0246 , H04J14/0282 , H04J14/0298
Abstract: Provided are a fault localization apparatus based on an optical communication network and a method thereof. In the fault localization apparatus according to the present invention, a downstream light source is used as a monitoring optical signal instead of using an additional monitoring light source and a subcarrier multiplexing (SCM) monitoring pulse signal of a certain frequency band having no interference with a frequency band of a downstream data signal is used and thus a fault position may be detected at low cost.
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公开(公告)号：KR100819054B1
公开(公告)日：2008-04-02
申请号：KR1020060125131
申请日：2006-12-08
Applicant: 한국전자통신연구원
IPC: H04L27/18
CPC classification number: H04L27/227 , H04L2027/0069
Abstract: An apparatus and a method for restoring a carrier wave in a base-band receiver of an MPSK system are provided to obtain a uniform acquisition time regardless of a frequency offset. An apparatus for restoring a carrier wave in a base-band receiver of an MPSK(M-ary Phase Shift Keying) system comprises a phase detecting unit(120), a frequency detecting unit(140), and a lock detecting unit(160). The phase detecting unit detects a phase offset of a base-band signal which is received in the apparatus and whose phase is shifted. The frequency detecting unit detects a frequency offset based on the output of the phase detecting unit. The lock detecting unit checks whether a frequency offset of the carrier wave is removed or not, and switches so as to use the output of the phase detecting unit or the frequency detecting unit for acquiring the carrier wave according to the checked result.
Abstract translation: 提供用于恢复MPSK系统的基带接收机中的载波的装置和方法，以获得均匀的采集时间，而不管频率偏移如何。 一种用于恢复MPSK（M元相移键控）系统的基带接收机中的载波的装置，包括相位检测单元（120），频率检测单元（140）和锁定检测单元（160） 。 相位检测单元检测在装置中接收并且其相位偏移的基带信号的相位偏移。 频率检测单元基于相位检测单元的输出检测频率偏移。 锁定检测单元检查是否消除了载波的频率偏移，并且根据检查结果进行切换以使用相位检测单元或频率检测单元的输出来获取载波。
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