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73 条记录 (耗时 0.038 秒)

    Wavelength tracking apparatus and method in WDM-PON system
    21.
    发明申请
    Wavelength tracking apparatus and method in WDM-PON system 有权
    WDM-PON系统中的波长跟踪装置及方法

    公开(公告)号：US20070154216A1

    公开(公告)日：2007-07-05

    申请号：US11635701

    申请日：2006-12-07

    申请人： Byoung Kim ,  Woo Lee ,  Yun Chung ,  Eui Son ,  Jang Chae

    发明人： Byoung Kim ,  Woo Lee ,  Yun Chung ,  Eui Son ,  Jang Chae

    IPC分类号： H04J14/00

    CPC分类号： H04J14/02 ,  H04J14/0221 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282

    摘要： Provided are an apparatus and method for tracking a wavelength in a passive optical subscriber network in which a central base station and at least one subscriber terminal are connected via a remote node. The apparatus includes a first wavelength aligning unit multiplexing and aligning wavelengths of optical signals from a plurality of single-mode optical sources of the central base station; a second wavelength aligning unit multiplexing and aligning wavelengths of optical signals transmitted to the remote node from a plurality of single-mode optical sources of the subscriber terminal; and a third wavelength aligning unit demultiplexing and aligning wavelengths of optical signals from the second wavelength aligning unit, the third wavelength aligning unit being included in the central base station. Accordingly, when the wavelengths of passbands of a multiplexer/demultiplexer (MUX/DEMUX) of a remote station change due to a change in the ambient temperature, wavelength tracking is performed by making aligned the wavelengths of optical sources of a central base station, a multiplexer/demultiplexer, and subscriber terminals, thereby minimizing optical channel loss and enabling reliable management of WDM-PON.

    摘要翻译： 提供了一种用于跟踪无源光用户网络中的波长的装置和方法，其中中央基站和至少一个用户终端经由远程节点连接。 该装置包括：第一波长对准单元，复用并对准来自中央基站的多个单模光源的光信号的波长; 第二波长对准单元，从用户终端的多个单模光源复用并对准从远程节点传输的光信号的波长; 以及第三波长对准单元，对来自所述第二波长对准单元的光信号进行解复用和对准波长，所述第三波长对准单元包括在所述中央基站中。 因此，当远程站的多路复用器/解复用器（MUX / DEMUX）的通带波长由于环境温度的变化而改变时，通过使中心基站的光源的波长对齐来执行波长跟踪， 多路复用器/解复用器和用户终端，从而最小化光信道丢失并实现WDM-PON的可靠管理。

    DTV TRANSMITTER AND METHOD OF CODING DATA IN DTV TRANSMITTER
    22.
    发明申请
    DTV TRANSMITTER AND METHOD OF CODING DATA IN DTV TRANSMITTER 有权
    数字电视发射机和数字电视发射机数据编码方法

    公开(公告)号：US20070140257A1

    公开(公告)日：2007-06-21

    申请号：US11612365

    申请日：2006-12-18

    申请人： Hyoung Gon Lee ,  In Choi ,  Kook Kwak ,  Byoung Kim ,  Jong Kim ,  Woo Kim ,  Jae Kim

    发明人： Hyoung Gon Lee ,  In Choi ,  Kook Kwak ,  Byoung Kim ,  Jong Kim ,  Woo Kim ,  Jae Kim

    IPC分类号： H04L12/56 ,  H04L12/28

    CPC分类号： H04N19/61 ,  H03M13/151 ,  H03M13/23 ,  H03M13/2933

    摘要： A DTV transmitter includes a pre-processor expanding original enhanced data, a data formatter generating enhanced data packets and inserting known data into the data packets, a multiplexer multiplexing the enhanced data packets with main data packets, a data randomizer randomizing the multiplexed data packets, an RS encoder RS-coding the randomized data packets, and a data interleaver interleaving the RS-coded data packets. The DTV transmitter further includes a byte-symbol converter converting the interleaved data packets into corresponding symbols, and a symbol processor encoding symbols representing the original enhanced data.

    摘要翻译： 数字电视发射机包括预处理器扩展原始增强数据，数据格式化器生成增强数据分组并将已知数据插入到数据分组中，多路复用增强数据分组与主数据分组，数据随机化器随机化多路复用数据分组， 对随机化数据分组进行RS编码的RS编码器，以及交织RS编码数据分组的数据交织器。 DTV发射机还包括将交错数据分组转换为对应符号的字节符号转换器，以及编码表示原始增强数据的符号的符号处理器。

    Apparatus and method for detecting light source causing optical beat interference in subcarrier multiple access optical network
    25.
    发明申请
    Apparatus and method for detecting light source causing optical beat interference in subcarrier multiple access optical network 审中-公开
    用于检测在子载波多址光网络中造成光学差拍干扰的光源的装置和方法

    公开(公告)号：US20060133805A1

    公开(公告)日：2006-06-22

    申请号：US11154255

    申请日：2005-06-15

    申请人： Seung-Hyun Jang ,  Chul-Soo Lee ,  Eui-Suk Jung ,  Byoung Kim

    发明人： Seung-Hyun Jang ,  Chul-Soo Lee ,  Eui-Suk Jung ,  Byoung Kim

    IPC分类号： H04B10/08

    CPC分类号： H04B10/0799

    摘要： An apparatus for detecting a light source causing OBI noise in an SCMA optical network. Subcarrier power meters in the apparatus measure powers of subcarrier signals obtained by filtering a multiplexed optical signal transmitted from the subscriber terminals. A OBI power meter measures OBI noise power from an output of an optical receiver that receives the multiplexed optical signal. A noise occurrence determination unit sequentially changes output powers of light sources in the subscriber terminals if the minimum SNR between the subcarrier signal powers and the OBI noise power is less than a reference SNR, and determines that a light source, which causes a change in the OBI noise power in response to the change in the output power of the light source, is an OBI-causing light source.

    摘要翻译： 一种用于检测在SCMA光网络中引起OBI噪声的光源的装置。 设备中的副载波功率计测量通过对从用户终端发送的复用光信号进行滤波而获得的子载波信号的功率。 OBI功率计测量来自接收复用光信号的光接收机的输出端的OBI噪声功率。 如果子载波信号功率和OBI噪声功率之间的最小SNR小于参考SN​​R，则噪声发生确定单元顺序地改变用户终端中的光源的输出功率，并且确定导致 响应于光源输出功率变化的OBI噪声功率是引起OBI的光源。

    Temperature-independent external cavity laser
    26.
    发明申请
    Temperature-independent external cavity laser 审中-公开
    温度独立外腔激光器

    公开(公告)号：US20060104322A1

    公开(公告)日：2006-05-18

    申请号：US11122840

    申请日：2005-05-04

    申请人： Mahn Park ,  Byoung Kim

    发明人： Mahn Park ,  Byoung Kim

    IPC分类号： H01S3/04

    CPC分类号： G02B5/26 ,  H01S3/106 ,  H01S5/02252 ,  H01S5/02272 ,  H01S5/02284 ,  H01S5/06804 ,  H01S5/1014 ,  H01S5/141

    摘要： Hybrid-type external cavity lasers designed to have a semiconductor laser diode mounted on a planar waveguide platform by a flip-chip bonding method. The temperature independent external cavity laser comprises a semiconductor laser diode, a planar waveguide platform, and a thin film multi-layered reflection filter. The semiconductor laser diode includes an active region to generate light, and at least one light-emitting surface. The planar waveguide platform includes a substrate, a metallic pattern formed on a predetermined region of the substrate, a waveguide structure, and a trench portion. The waveguide structure comprises a lower clad layer, a core, and an upper clad layer sequentially stacked in this order on a region of the substrate excluding the predetermined region formed of the metallic pattern. The trench portion has opposite side surfaces on which the core is exposed.

    摘要翻译： 混合型外腔激光器被设计成通过倒装芯片接合方法将半导体激光二极管安装在平面波导平台上。 独立于温度的外腔激光器包括半导体激光二极管，平面波导平台和薄膜多层反射滤光器。 半导体激光二极管包括用于产生光的有源区和至少一个发光表面。 平面波导平台包括基板，形成在基板的预定区域上的金属图案，波导结构和沟槽部分。 波导结构包括在除了由金属图案形成的预定区域之外的基板的区域上依次层叠的下包层，芯和上包层。 沟槽部分具有相对的侧表面，芯在其上露出。

    Loop-back wavelength division multiplexing passive optical network
    27.
    发明申请
    Loop-back wavelength division multiplexing passive optical network 审中-公开
    环回波分复用无源光网络

    公开(公告)号：US20060093359A1

    公开(公告)日：2006-05-04

    申请号：US11110587

    申请日：2005-04-19

    申请人： Woo Lee ,  Seung Cho ,  Byoung Kim ,  Jae Park

    发明人： Woo Lee ,  Seung Cho ,  Byoung Kim ,  Jae Park

    IPC分类号： H04J14/00

    CPC分类号： H04J14/0226 ,  H04B10/2587 ,  H04B10/27 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J2014/0253

    摘要： Disclosed herein is an apparatus and method for managing faults of a loop-back Wavelength Division Multiplexing Passive Optical Network (WDM-PON). The apparatus includes a control light source as well as a plurality of light sources in a central office, a loop-back means for transmitting control light to the central office through a remote node optical demultiplexer or remote node optical multiplexer in a remote node, a control light receiver for receiving looped-back control light, and a control unit for maintaining power of the upstream signals, which are received by central office receivers, and power of the control light, which is received by the control light receiver, at a maximum.

    摘要翻译： 这里公开了一种用于管理环回波分复用无源光网络（WDM-PON）的故障的装置和方法。 该设备包括控制光源以及中心局中的多个光源，用于通过远程节点中的远程节点光解复用器或远程节点光复用器将控制光发射到中心局的环回装置， 控制光接收器，用于接收环回控制光;以及控制单元，用于维持由中心局接收器接收的上行信号的功率和由控制光接收器接收的控制光的功率，最大值 。

    WDM/SCM-PON and media access control method for asymmetric packet communication in the same
    28.
    发明申请
    WDM/SCM-PON and media access control method for asymmetric packet communication in the same 失效
    WDM / SCM-PON和媒体访问控制方法在非对称分组通信中相同

    公开(公告)号：US20050129400A1

    公开(公告)日：2005-06-16

    申请号：US10912340

    申请日：2004-08-04

    申请人： Tae Kim ,  Jeong Yoo ,  Byoung Kim

    发明人： Tae Kim ,  Jeong Yoo ,  Byoung Kim

    IPC分类号： H04L12/56 ,  H04J14/00 ,  H04J14/02 ,  H04Q11/00

    CPC分类号： H04J14/0282 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0298 ,  H04Q11/0067 ,  H04Q2011/0016 ,  H04Q2011/0086

    摘要： The present invention relates to a WDM/SCM-PON and a media access control method for asymmetric packet communication in the same. In the WDM/SCM-PON, each SCM channel is classified and used as a link by adopting an SCM technique of subdividing a wavelength band of up/downstream data links between an OLT and ONTs into frequency bands, and the ONTs are formed so that a certain SCM channel is independently distributed not fixedly assigned. Accordingly, an inventory problem, which can be generated in WDM/SCM, is prevented before happens, asymmetric dynamic band allocation is performed, and asymmetric service of up/downstream transmission is supported. As a result, a band required for next generation service is dynamically provided, optical interference effect is minimized, and Ethernet compatibility is provided so that Ethernet service suitable for providing IP service can be accommodated.

    摘要翻译： 本发明涉及一种WDM / SCM-PON及其中的非对称分组通信的媒体接入控制方法。 在WDM / SCM-PON中，通过采用将OLT和ONT之间的上下行数据链路的波段划分成频带的SCM技术将每个SCM信道分类并用作链路，并且形成ONT，使得 某个SCM信道是独立分配的，没有固定分配。 因此，在发生之前可以防止在WDM / SCM中产生的库存问题，执行非对称动态频带分配，支持上下行传输的非对称业务。 结果，动态地提供了下一代业务所需的频带，减少了光干扰效应，提供了以太网兼容性，从而可以适应提供IP业务的以太网业务。

    Two-dimensional wavelength/time optical CDMA system adopting balanced-modified pseudo random noise matrix codes
    29.
    发明申请
    Two-dimensional wavelength/time optical CDMA system adopting balanced-modified pseudo random noise matrix codes 审中-公开
    采用平衡修正伪随机噪声矩阵码的二维波长/时间光CDMA系统

    公开(公告)号：US20050100338A1

    公开(公告)日：2005-05-12

    申请号：US10864561

    申请日：2004-06-08

    申请人： Younghee Yeon ,  Bong Kim ,  Sung Cho ,  Sang Park ,  Byoung Kim

    发明人： Younghee Yeon ,  Bong Kim ,  Sung Cho ,  Sang Park ,  Byoung Kim

    IPC分类号： H04B1/69 ,  H04J14/00 ,  H04J4/00

    CPC分类号： H04J14/005

    摘要： A two-dimensional wavelength/time optical CDMA system employing balanced-modified pseudo random noise (PN) matrix codes is provided. Through an inverse-exclusive OR operation of a pair of modified PN code, the balanced codes are generated as optical CDMA codes in the form of a new matrix. When the codes are applied to an optical CDMA system to perform encoding and decoding, if the same number of channels as the number (M−1) of subgroups of the codes are connected, the system becomes an MAI-free system, and even if the number of channels connected is twice the number of the subgroups, an error-free system can be established. Accordingly, the number of channels that can be used simultaneously is doubled compared to the prior art method such that the economical efficiency of the optical CDMA system improves.

    摘要翻译： 提供了采用平衡修正伪随机噪声（PN）矩阵码的二维波长/时间光CDMA系统。 通过一对经修改的PN码的逆异或运算，平衡码产生为新矩阵形式的光CDMA码。 当将代码应用于光CDMA系统进行编码和解码时，如果与代码子组的数量（M-1）相同数量的信道被连接，则系统变为无MAI的系统，并且即使 连接的通道数量是子组数量的两倍，可以建立无错误的系统。 因此，与现有技术方法相比，可以同时使用的信道数量增加一倍，使得光CDMA系统的经济效率提高。