-
公开(公告)号：KR100478510B1
公开(公告)日：2005-03-28
申请号：KR1020020075880
申请日：2002-12-02
Applicant: 한국전자통신연구원
IPC: H04B10/00
CPC classification number: G02B6/2932 , H04L7/0075 , H04L7/027
Abstract: 본 발명은 광신호의 스펙트럼 상에서 원하는 파장을 이용하여 클럭 성분을 추출하고 추출된 클럭 성분의 노이즈와 지터(jitter)의 영향을 줄여 광통신 시스템의 안정성을 향상시킬 수 있는 광학적 클럭 추출 방법에 관한 것으로,
광스펙트럼 상의 서로 다른 주파수에서 복수개의 피크를 갖는 광신호에서 클럭을 추출하는 방법에 있어서, 상기 복수개의 피크 중 서로 인접한 피크 사이의 주파수 대역을 필터링 하여 복수개의 클럭성분을 추출하는 제1 단계; 및 상기 제1 단계에서 추출된 복수개의 클럭성분 중 2개의 클럭성분을 서로 논리적 AND 시킨 클럭을 생성하는 제2 단계를 포함하는 광학적 클럭추출 방법을 제공하며,
본 발명에 의하면, 전송되는 광신호에서 복수개의 클럭성분을 추출하여 서로 논리적 AND를 시켜 노이즈 성분과 지터(jitter)의 영향을 줄임으로써 광학적 시스템의 안정성을 향상시킬 수 있다.-
公开(公告)号：KR100475850B1
公开(公告)日：2005-03-10
申请号：KR1020020061214
申请日：2002-10-08
Applicant: 한국전자통신연구원
IPC: H04B10/00
CPC classification number: H04B10/299 , H04L7/0075 , H04L7/027
Abstract: 본 발명은 광통신 시스템에서 광학적으로 클럭(clock)을 추출하는 방법에 관한 것으로, 구체적으로는 반사파장이 고정된 광 필터(optical filter)를 사용하여 클럭을 추출하는 방법 및 장치에 관한 것이다. 본 발명의 클럭 추출장치는 광 신호를 입력받아 스펙트럼을 분석하여, 상기 스펙트럼상에서 최고정점보다 크기가 작으면서 상기 최고정점의 양측면에서 인접하여 존재하는 제2최대치에 해당하는 스펙트럴 라인 중 어느 하나를 추출하는 제1필터; 상기 최고정점에 해당되는 스펙트럴 라인을 추출하는 제2필터; 상기 제1필터와 제2필터에 의해 추출된 두 개의 스펙트럴 라인의 광세기가 동일하게 되도록 상기 광 신호의 세기를 조정하는 감쇠기; 및 상기 조정된 두 개의 스펙트럴 라인에 대응되는 신호성분만을 상기 광 신호에서 추출하여, 두 신호성분의 주파수 차 성분을 만들어 클럭신호로 출력하는 맥놀이 발생수단을 포함한다. 본 발명의 방법을 사용하면 클럭 추출장치를 저가로 만들 수 있으며, 제어가 간단하다는 장점이 있다.
-
公开(公告)号：KR1020030010859A
公开(公告)日：2003-02-06
申请号：KR1020010045498
申请日：2001-07-27
Applicant: 한국전자통신연구원
IPC: H04L12/50
Abstract: PURPOSE: A performance extendable clos switching system is provided to efficiently add a function using residual null ports which are not used. CONSTITUTION: An input terminal switch(100) and an output terminal switch(300) have null ports(11,12,31,32) in which the input and output of a signal is not generated. The null ports(11,12,31,32) are connected to a process unit(400) which performs a specific process so that a signal for requesting the specific process is inputted to the process unit(400) through the null ports(11,12,31,32) and is outputted to the null ports(11,12,31,32) after executing the specific process. The process unit(400) is connected to the null port(11) of an input port of the input terminal switch(100) and the null port(12) of an output port of the input terminal switch(100).
Abstract translation: 目的：提供一种性能可扩展切换系统，以便使用不使用的剩余空端口来有效地添加功能。 构成：输入端子开关（100）和输出端子开关（300）具有不产生信号的输入和输出的空端口（11,12,31,32）。 空端口（11,12,31,32）连接到执行特定处理的处理单元（400），使得用于请求特定处理的信号通过空端口（11）输入到处理单元（400） ，12,31,32），并且在执行特定处理之后被输出到空端口（11,12,31,32）。 处理单元（400）连接到输入端子开关（100）的输入端口的空端口（11）和输入端子开关（100）的输出端口的空端口（12）。
-
公开(公告)号：KR1020090064919A
公开(公告)日：2009-06-22
申请号：KR1020070132297
申请日：2007-12-17
Abstract: An apparatus and a method for controlling a gain of a burst signal in an interactive communication system are provided to enable a relay located in a dead zone to adjust a gain of a burst signal through pilot signals detected from a terminal located in a mobile body, thereby preventing deterioration of performance due to signal attenuation inside a tunnel. A transmitting unit(301) produces a burst signal about transmitting data. A pilot generating unit(302) produces a plurality of pilot signals located in the outside of a use frequency band of a mobile terminal. A multiplexing unit(303) multiplexes the burst signal and the pilot signal. The multiplexing unit transmits the multiplexed signals to the relay.
Abstract translation: 提供了一种用于控制交互式通信系统中的突发信号的增益的装置和方法，以使位于死区中的中继器能够通过从位于移动体中的终端检测到的导频信号来调整突发信号的增益， 从而防止由隧道内的信号衰减引起的性能劣化。 发送单元（301）产生关于发送数据的突发信号。 导频生成部（302）生成位于移动终端的使用频带外侧的多个导频信号。 复用单元（303）对突发信号和导频信号进行复用。 复用单元将多路复用信号发送到继电器。
-
公开(公告)号：KR100687752B1
公开(公告)日：2007-02-27
申请号：KR1020050096948
申请日：2005-10-14
Applicant: 한국전자통신연구원
Abstract: A method and an apparatus for optical clock signal extraction are provided to enable a bi-directional amplifier to amplify selected frequency components and repeatedly amplify frequency components reflected from the reflector and enable an FPF to obtain the frequency components, of which noise components are removed, and extract a clock signal on the basis of the obtained frequency components. An apparatus for optical clock signal extraction(200) comprises the followings: a reflector(260); a bi-directional amplifier(250) which amplifies the frequency components of inputted optical signals and inputs the amplified input optical signals to the reflector(260), and repeatedly amplifies frequency components reflected from the reflector(260); a PBS(Polarization Beam Splitter)(230); an FPF(Fabry-Perot Filter)(240) which receives predetermined polarization components split by the PBS(230) and selects frequency components for clock signal extraction, and inputs the selected frequency components to the bi-directional amplifier(250), and receives the frequency components repeatedly amplified by the bi-directional amplifier(250), and removes noise components; and a PD(Photo Detector)(270).
Abstract translation: 提供了一种用于光学时钟信号提取的方法和设备，以使得双向放大器能够放大选择的频率分量并且重复放大从反射器反射的频率分量并且使得FPF能够获得噪声分量被去除的频率分量， 并基于所获得的频率分量提取时钟信号。 一种光时钟信号提取装置（200），包括：反射器（260）; 双向放大器（250），其放大输入的光信号的频率分量，并将放大的输入光信号输入到反射器（260），并且重复放大从反射器（260）反射的频率分量; PBS（偏振分束器）（230）; 接收由PBS（230）分离的预定偏振分量并且选择用于时钟信号提取的频率分量的FPF（法布里 - 珀罗滤波器）（240），并且将选择的频率分量输入到双向放大器（250），并且接收 由双向放大器（250）重复放大的频率分量，并去除噪声分量; 和PD（光电检测器）（270）。
-
Patent Agency Ranking
公开(公告)号：KR1020060127660A
公开(公告)日：2006-12-13
申请号：KR1020050048904
申请日：2005-06-08
Applicant: 한국전자통신연구원
CPC classification number: H04L7/0075
Abstract: A clock extracting apparatus is provided to increase a tolerance range of a difference between sizes of two frequency components by changing maximum and minimum values of a spectrum by controlling temperature or an amount of current applied to an FP(Fabry-Perot) LD(Laser Diode). A circulator(31) changes the direction of an input optical signal. A current and temperature controller(32) controls an amount of applied current. An FP LD(33) selects two frequency components, having a different size within a spectrum of the input optical signal, respectively, applies appropriate current in consideration of a size difference between the two frequency components to make the two frequency components have the same size, and extracts a clock signal by beating the two frequency components.
Abstract translation: 提供时钟提取装置，通过控制施加到FP（法布里 - 珀罗）的LD（激光二极管）的温度或电流量来改变频谱的最大和最小值来增加两个频率分量的大小之间的差异的公差范围 ）。 循环器（31）改变输入光信号的方向。 电流和温度控制器（32）控制施加的电流量。 FP LD（33）分别选择在输入光信号的频谱内具有不同尺寸的两个频率分量，考虑到两个频率分量之间的尺寸差来应用适当的电流，以使两个频率分量具有相同的尺寸 ，并通过拍摄两个频率分量来提取时钟信号。
-
公开(公告)号：KR100655663B1
公开(公告)日：2006-12-11
申请号：KR1020050075232
申请日：2005-08-17
Applicant: 한국전자통신연구원
Abstract: A frequency extraction apparatus and a signal extraction system using the same are provided to extract a frequency component of desired band and amplitude accurately by using a FP LD(Fabry-Perot Laser Diode). In a frequency extraction apparatus, a circulator(22,26) changes an output direction of an inputted signal. A frequency selection unit(23,27) extracts a desired frequency component of an input signal transferred from the rotation unit, and then transfers the extracted frequency component to the rotation unit. A control unit(24,28) provides a control signal to change a wavelength and amplitude of the frequency of an output mode of a frequency control unit(25,29). The frequency control unit controls the frequency wavelength of the output mode according to the control signal from the control unit in order to coincide with the frequency transferred through the rotation unit, and controls the amplitude of the corresponding frequency component, and then outputs the frequency through the rotation unit.
Abstract translation: 提供了一种频率提取设备和使用该设备的信号提取系统，以通过使用FP LD（法布里 - 珀罗激光二极管）精确地提取期望频带和振幅的频率分量。 在频率提取装置中，循环器（22,26）改变输入信号的输出方向。 频率选择单元（23,27）提取从旋转单元传送的输入信号的期望频率分量，然后将提取的频率分量传送到旋转单元。 控制单元（24,28）提供控制信号以改变频率控制单元（25,29）的输出模式的频率的波长和幅度。 频率控制单元根据来自控制单元的控制信号来控制输出模式的频率波长，以便与通过旋转单元传送的频率一致，并且控制对应的频率分量的幅度，然后通过 旋转单元。
-
公开(公告)号：KR1020040038552A
公开(公告)日：2004-05-08
申请号：KR1020020067552
申请日：2002-11-01
Applicant: 한국전자통신연구원
Inventor： 이재명
IPC: G02B26/08
Abstract: PURPOSE: A switching apparatus having a constant insertion loss and a method for constructing the same are provided to reduce the manufacturing cost by utilizing an inexpensive variable optical attenuator. CONSTITUTION: A switching apparatus having a constant insertion loss between the specific ports of two planes(11,12) includes an M x N optical switching device(100), an attenuator(15) and a variable optical attenuator(VOA)(16). The M x N optical switching device(100) determine the input and output planes(11,12) so as to have a maximum-minimum loss difference by comparing the maximum-minimum loss difference when the first plane(11) is selected as an output port with the maximum-minimum loss difference and when the second plane is selected as an output port. The attenuator(15) is added for compensating the difference between the maximum loss at each output port of the M x N optical switching device(100) and the specific port. And, the VOA(16) is added to the corresponding output port so as to receive the maximum-minimum loss difference at each of the output ports after the attenuator(15) is added to the specific output port.
Abstract translation: 目的：提供具有恒定插入损耗的开关装置及其构造方法，以通过利用便宜的可变光衰减器来降低制造成本。 构成：在两个平面（11,12）的特定端口之间具有恒定插入损耗的开关装置包括M×N个光开关装置（100），衰减器（15）和可变光衰减器（VOA） 。 M×N光开关装置（100）通过将第一平面（11）被选择为最大最小损耗差进行比较来确定输入和输出平面（11,12）以具有最大最小损耗差 输出端口具有最大 - 最小损耗差异，当第二个平面被选为输出端口时。 增加衰减器（15）以补偿M×N光开关器件（100）的每个输出端口与特定端口的最大损耗之间的差异。 并且，将VOA（16）添加到相应的输出端口，以便在将衰减器（15）添加到特定输出端口之后，在每个输出端口接收最大最小损耗差。
-
公开(公告)号：KR1020040032264A
公开(公告)日：2004-04-17
申请号：KR1020020061214
申请日：2002-10-08
Applicant: 한국전자통신연구원
IPC: H04B10/00
CPC classification number: H04B10/299 , H04L7/0075 , H04L7/027
Abstract: PURPOSE: A clock extracting apparatus using an optical filter and a method therefor are provided to extract a clock from a data signal by reducing noise components and economically extracting a spectral line component. CONSTITUTION: A circulator(510) changes a path of an optical signal, and prevents optical signals reflected from the first filter(520) and the second filter(530) from being mixed with a different signal. The first filter(520) reflects a side peak, and extracts a spectral line corresponding to the second side peak. The second filter(530) reflects a wavelength corresponding to a peak, and extracts a spectral line corresponding to the peak. An attenuator(540) makes optical strengths of extracted spectral lines the same. A photodiode(550) receives frequency signals of two spectral lines having the same optical strength and generates a beating phenomenon to extract a clock component.
Abstract translation: 目的：提供使用滤光器及其方法的时钟提取装置，通过减少噪声分量并经济地提取谱线分量从数据信号中提取时钟。 构成：循环器（510）改变光信号的路径，并防止从第一滤波器（520）和第二滤波器（530）反射的光信号与不同的信号混合。 第一滤光器（520）反射侧峰，并提取与第二侧峰对应的谱线。 第二滤光器（530）反映与峰值相对应的波长，并提取与峰值对应的谱线。 衰减器（540）使得提取的光谱线的光强度相同。 光电二极管（550）接收具有相同光强度的两条光谱线的频率信号，产生一个抽出现象来提取时钟分量。
-
公开(公告)号：KR1020030049471A
公开(公告)日：2003-06-25
申请号：KR1020010079679
申请日：2001-12-15
Applicant: 한국전자통신연구원
IPC: G02F1/015
Abstract: PURPOSE: A method for setting input and output planes of a photonic space switch is provided to grasp switching loss between input/output ports of the photonic space switch to set optimum input and output ports. CONSTITUTION: Insertion loss between a port of a photonic space switch having a plurality of ports, through which an optical signal having a predetermined wavelength is inputted and a port of the photonic space switch through which the optical signal is output is calculated(210). An insertion loss difference for each ports outputting the optical signal is calculated from the insertion loss(230). Among the ports receiving the optical signal and the ports outputting the optical signal, ports having a minimum insertion loss difference are selected as input/output ports(240). The optical signal is received through the set input port and output through the set output port(250).
Abstract translation: 目的：提供一种用于设置光子空间开关的输入和输出平面的方法，以掌握光子空间开关的输入/输出端口之间的开关损耗，以设置最佳输入和输出端口。 计算出具有输入具有预定波长的光信号的多个端口的光子空间开关的端口与输出光信号的光子空间开关的端口之间的插入损耗（210）。 从插入损耗（230）计算输出光信号的各端口的插入损耗差。 在接收光信号的端口和输出光信号的端口中，选择具有最小插入损耗差的端口作为输入/输出端口（240）。 光信号通过设定输入端口接收并通过设定输出端口（250）输出。
-
-
-
-
-
-
-
-
-
Search Results
20
records
(took 0.021 seconds)
