公开(公告)号：US07733825B2

公开(公告)日：2010-06-08

申请号：US11514440

申请日：2006-09-01

申请人： Sang-Ho Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Gyu-Woong Lee ,  Hoon Kim ,  Sung-Kee Kim ,  Han-Lim Lee ,  Jae-Hoon Lee ,  Yong-Gyoo Kim ,  Dae-Eun Choi

发明人： Sang-Ho Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Gyu-Woong Lee ,  Hoon Kim ,  Sung-Kee Kim ,  Han-Lim Lee ,  Jae-Hoon Lee ,  Yong-Gyoo Kim ,  Dae-Eun Choi

IPC分类号： H04W4/00 ,  H04L12/56

CPC分类号： H04W88/085

摘要： A radio over fiber (ROF) link apparatus capable of a stable TDD wireless service for a time division duplexing (TDD) baseband signal includes a central access platform (CAP) for receiving various kinds of data including the TDD baseband signal from upper layers, multiplexing the data, electro-optically converting the multiplexed data, and transmitting the converted data as downstream data through an optical fiber, and opto-electrically converting upstream data received through the optical fiber, demultiplexing the converted upstream data, and transmitting the demultiplexed upstream data to the respective upper layers, and a remote access unit (RAU) for receiving the downstream data through the optical fiber, opto-electrically converting the received downstream data to the multiplexed data, demultiplexing the multiplexed data, performing a wireless access process of the demultiplexed data, and transmitting the wireless access processed data to a wireless local area network (WLAN) service terminal through an antenna.

摘要翻译： 能够对TDD时基双工（TDD）基带信号进行稳定的TDD无线业务的无线电光纤（ROF）链路装置包括用于从上层接收包括TDD基带信号的各种数据的中央接入平台（CAP） 数据，电光转换多路复用数据，并通过光纤将转换后的数据作为下行数据发送，并对通过光纤接收的上行数据进行光电转换，对转换的上行数据进行解复用，并将解复用的上行数据发送到 各自的上层以及用于通过光纤接收下游数据的远程访问单元（RAU），将接收到的下游数据光电转换为多路复用数据，解复用多路复用数据，执行解复用数据的无线接入处理 ，并将无线接入处理的数据发送到无线局域网（WLAN）服务 e端子通过天线。

公开(公告)号：US20070053311A1

公开(公告)日：2007-03-08

申请号：US11514440

申请日：2006-09-01

申请人： Sang-Ho Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Gyu-Woong Lee ,  Hoon Kim ,  Sung-Kee Kim ,  Han-Lim Lee ,  Jae-Hoon Lee ,  Yong-Gyoo Kim ,  Dae-Eun Choi

发明人： Sang-Ho Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Gyu-Woong Lee ,  Hoon Kim ,  Sung-Kee Kim ,  Han-Lim Lee ,  Jae-Hoon Lee ,  Yong-Gyoo Kim ,  Dae-Eun Choi

IPC分类号： H04J3/00

CPC分类号： H04W88/085

摘要： A radio over fiber (ROF) link apparatus capable of a stable TDD wireless service for a time division duplexing (TDD) baseband signal includes a central access platform (CAP) for receiving various kinds of data including the TDD baseband signal from upper layers, multiplexing the data, electro-optically converting the multiplexed data, and transmitting the converted data as downstream data through an optical fiber, and opto-electrically converting upstream data received through the optical fiber, demultiplexing the converted upstream data, and transmitting the demultiplexed upstream data to the respective upper layers, and a remote access unit (RAU) for receiving the downstream data through the optical fiber, opto-electrically converting the received downstream data to the multiplexed data, demultiplexing the multiplexed data, performing a wireless access process of the demultiplexed data, and transmitting the wireless access processed data to a wireless local area network (WLAN) service terminal through an antenna.

摘要翻译： 能够对TDD时基双工（TDD）基带信号进行稳定的TDD无线业务的无线电光纤（ROF）链路装置包括用于从上层接收包括TDD基带信号的各种数据的中央接入平台（CAP） 数据，电光转换多路复用数据，并通过光纤将转换后的数据作为下行数据发送，并对通过光纤接收的上行数据进行光电转换，对转换的上行数据进行解复用，并将解复用的上行数据发送到 各自的上层以及用于通过光纤接收下游数据的远程访问单元（RAU），将接收到的下游数据光电转换为多路复用数据，解复用多路复用数据，执行解复用数据的无线接入处理 ，并将无线接入处理的数据发送到无线局域网（WLAN）服务 e端子通过天线。

公开(公告)号：US20060018667A1

公开(公告)日：2006-01-26

申请号：US11005428

申请日：2004-12-06

申请人： Han-Lim Lee ,  Hoon Kim ,  Jae-Hoon Lee ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Han-Lim Lee ,  Hoon Kim ,  Jae-Hoon Lee ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04B10/04 ,  H04B10/12

CPC分类号： H04B10/505 ,  H04B10/5055 ,  H04B10/5167

摘要： An optical transmission apparatus using duobinary modulation adapted to an optical communication system using dense wavelength division multiplexing (DWDM) is disclosed. The duo-binary optical transmission apparatus includes an electro-absorption modulated laser (EML) for performing a light intensity modulation operation based on an electrical data signal and producing a modulated optical signal, the EML having a light source for outputting carriers and a modulator for performing the light intensity modulation operation, a precoder for inputting an inverted signal of the electrical data signal and encoding it to an encoded signal, and a modulator for performing a phase modulation of the optical signal modulated by the EML and outputting a duo-binary optical signal, according to the encoded signal.

摘要翻译： 公开了一种使用二进制调制的光传输装置，其适用于使用密集波分复用（DWDM）的光通信系统。 双二进制光传输装置包括：电吸收调制激光器（EML），用于基于电数据信号执行光强度调制操作并产生调制光信号，所述EML具有用于输出载波的光源和用于 执行光强调制操作，用于输入电数据信号的反相信号并将其编码为编码信号的预编码器，以及用于对由EML调制的光信号进行相位调制的调制器，并输出二进制二进制光 信号，根据编码信号。

公开(公告)号：US20050058461A1

公开(公告)日：2005-03-17

申请号：US10843233

申请日：2004-05-10

申请人： Han-Lim Lee ,  Hoon Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Sung-Kee Kim ,  Gyu-Woong Lee

发明人： Han-Lim Lee ,  Hoon Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Sung-Kee Kim ,  Gyu-Woong Lee

IPC分类号： G02F1/035 ,  H04B10/2507 ,  H04B10/2513 ,  H04B10/2537 ,  H04B10/516 ,  H04B10/61 ,  H04B10/04

CPC分类号： H04B10/505 ,  H04B10/5055 ,  H04B10/5167

摘要： A duobinary optical transmission device that uses a duobinary optical transmission technique is disclosed. The duobinary optical transmission device may use an X-cut Mach-Zehnder interferometer type modulator. The duobinary optical transmission device includes a light source that outputs a carrier wave. A duobinary encoder encodes an input non-return-to-zero (NRZ) electrical signal. A low pass filter (LPF) converts the encoded signal into a 3-level electrical signal. An optical intensity modulator modulates the phase and light intensity of the carrier wave according to the 3-level electrical signal and outputs a 2-level optical duobinary signal. The optical intensity modulator may be an X-cut optical intensity modulator including a substrate; an optical waveguide formed on the substrate, and an electrode for applying an electric field.

摘要翻译： 公开了一种使用双二进制光传输技术的双向光传输装置。 双向光传输装置可以使用X切割马赫 - 曾德干涉仪型调制器。 二元光传输装置包括输出载波的光源。 二进制编码器对输入的不归零（NRZ）电信号进行编码。 低通滤波器（LPF）将编码信号转换为3级电信号。 光强调制器根据3电平电信号调制载波的相位和光强，并输出2电平的光双二进制信号。 光强度调制器可以是包括衬底的X切割光强度调制器; 形成在基板上的光波导和用于施加电场的电极。

公开(公告)号：US20080107202A1

公开(公告)日：2008-05-08

申请号：US11906370

申请日：2007-10-02

申请人： Han-Lim Lee ,  Shuangfeng Han ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Hoon Kim

发明人： Han-Lim Lee ,  Shuangfeng Han ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Hoon Kim

IPC分类号： H04B7/02

CPC分类号： H04L27/18 ,  H04B7/0413 ,  H04B10/2575 ,  H04J13/00

摘要： A multiple-input multiple-output (MIMO) communication system includes a base station and a relay station that are connected through an optical fiber. The relay station wirelessly transmits through a plurality of antennas a signal received from the base station. The base station includes a plurality of symbol mappers for mapping input bit streams into a plurality of symbol signals; a MIMO multiplexer generating a plurality of exchange signals by exchanging bits of the symbol signals; and a plurality of code spreaders generating a plurality of spread signals by band spreading the exchange signals. The adoption of a wire transmission scheme for connecting the base station with the relay station through a single optical fiber provides benefits in cost reduction and complexity as the number of electrical-to-optical converters is reduced, and the bandwidth is superior to those in wireless transmission scheme

摘要翻译： 多输入多输出（MIMO）通信系统包括通过光纤连接的基站和中继站。 中继站通过多个天线无线地发送从基站接收的信号。 基站包括用于将输入比特流映射成多个符号信号的多个符号映射器; MIMO多路复用器，通过交换所述符号信号的位来产生多个交换信号; 以及多个代码扩展器，通过对交换信号进行频谱扩展来产生多个扩展信号。 采用通过单个光纤将基站与中继站连接的有线传输方案随着电 - 光转换器的数量的减少和复杂度的降低和复杂性的提高，带宽优于无线 传输方案

公开(公告)号：US07224907B2

公开(公告)日：2007-05-29

申请号：US10459788

申请日：2003-06-12

申请人： Han-Lim Lee ,  Ji-Chai Jeong ,  Yong-Hoon Kim ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Han-Lim Lee ,  Ji-Chai Jeong ,  Yong-Hoon Kim ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04B10/04 ,  H04B10/12

CPC分类号： H04B10/505 ,  H04B10/5055 ,  H04B10/508

摘要： A duobinary optical transmission apparatus is provided to generate duobinary optical signals, without using an electric low-pass-filter (LPF), by restricting a bandwidth of a Mach-Zehnder-interferometer-type optical intensity modulator (MZ MOD). Alternatively, a LPF having a single pole with a single capacitor is implemented instead of an expensive LPF, thereby providing a simple transmitter with a lower production cost in comparison with a transmitter using a conventional electric LPF.

摘要翻译： 提供双二进制光传输装置，通过限制马赫 - 曾德干涉仪型光强度调制器（MZ MOD）的带宽，而不使用电气低通滤波器（LPF）来产生双二进制光信号。 或者，实现具有单个电容器的单极点的LPF而不是昂贵的LPF，从而与使用常规电气LPF的发射器相比，提供具有较低生产成本的简单发射器。

公开(公告)号：US07474858B2

公开(公告)日：2009-01-06

申请号：US10849070

申请日：2004-05-19

申请人： Han-Lim Lee ,  Gyu-Woong Lee ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Han-Lim Lee ,  Gyu-Woong Lee ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04B10/00

CPC分类号： H04B10/505 ,  H04B10/5055 ,  H04B10/508

摘要： A duobinary optical transmission device provides duobinary optical transmission with improved quality by a technique that does not require an electrical low pass filter LPF.A duobinary optical transmission device includes at least one semiconductor optical amplifier (SOA). A light source outputs a carrier wave as an optical signal. A precoder encodes an input of a non-return-to-zero (NRZ) electrical signal. An interferometer type semiconductor optical amplification unit modulates the carrier wave according to a change of an applied bias current coupled to the encoded signal. An optical band pass filter (OBPF) receives the phase-modulated optical signal from the semiconductor optical amplification unit, filters the received phase-modulated optical signal according to a designated band, and outputs an optical duobinary signal.

摘要翻译： 双二进制光传输装置通过不需要电气低通滤波器LPF的技术提供具有改进质量的双向光传输。双二进制光传输装置包括至少一个半导体光放大器（SOA）。 光源输出载波作为光信号。 预编码器对不归零（NRZ）电信号的输入进行编码。 干涉仪型半导体光放大单元根据耦合到编码信号的施加的偏置电流的变化来调制载波。 光带通滤波器（OBPF）从半导体光放大单元接收相位调制光信号，根据指定频带对接收的相位调制光信号进行滤波，并输出光双二进制信号。

公开(公告)号：US20080102881A1

公开(公告)日：2008-05-01

申请号：US11977612

申请日：2007-10-25

申请人： Shuangfeng Han ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Han-Lim Lee

发明人： Shuangfeng Han ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Han-Lim Lee

IPC分类号： H04Q7/20 ,  H04M1/00

CPC分类号： H01Q3/30 ,  H04B7/0443 ,  H04B7/0669 ,  H04B7/0691 ,  H04W52/346 ,  H04W52/42

摘要： An apparatus that adaptively allocates transmission power for beam-forming combined with orthogonal space time block codes in a distributed wireless communication system, the apparatus including: sub-arrays for beam-forming, which are geographically distributed and each of which includes a plurality of distributed antennas placed in random groups. A central processing unit provides predetermined combinable power allocation schemes according to subsets in a plurality of the sub-arrays, identifying performances of the schemes by using information on large-scale fading of each of the sub-arrays fed back from a receiving party, setting a subset having best performance as an optimal subset according to the identified performances, and performing power allocation according thereto.

摘要翻译： 一种在分布式无线通信系统中自适应地分配与正交空间时间块码组合的波束成形的发射功率的装置，该装置包括：地理分布的波束形成子阵列，每个子阵列包括多个分布式 天线放置在随机组中。 中央处理单元根据多个子阵列中的子集提供预定的可组合功率分配方案，通过使用关于从接收方反馈的每个子阵列的大规模衰落的信息来识别方案的性能，设置 根据所识别的性能，具有作为最佳子集的最佳性能的子集，以及根据所识别的性能执行功率分配。

公开(公告)号：US07653039B2

公开(公告)日：2010-01-26

申请号：US11356822

申请日：2006-02-17

申请人： Gyu-Woong Lee ,  Kwan-Soo Lee ,  Chang-Sup Shim ,  Yun-Je Oh ,  Jae-Hoon Lee ,  Seong-Taek Hwang

发明人： Gyu-Woong Lee ,  Kwan-Soo Lee ,  Chang-Sup Shim ,  Yun-Je Oh ,  Jae-Hoon Lee ,  Seong-Taek Hwang

IPC分类号： H04W4/00

CPC分类号： H04W92/02 ,  H04B10/2575 ,  H04L63/08 ,  H04W12/06 ,  H04W84/04 ,  H04W84/12 ,  H04W88/08 ,  H04W88/085

摘要： A network system for interworking a Wireless Local Area Network (W-LAN) and a 3rd-Generation (3G) mobile communication network through a Radio-over-Fiber(RoF) link and an authentication method in interworking in the network system are provided. The network system includes a 3G mobile communication network and a W-LAN system. The 3G mobile communication network includes a voice signal processing network connected to a Public Switched Telephone Network (PSTN) for voice call processing with respect to a predetermined mobile terminal, a packet data network for data communication with the predetermined mobile terminal, and a terminal device for communication with the predetermined mobile terminal. The W-LAN system is connected to the packet data network of the 3G mobile communication network to provide a W-LAN service to the predetermined mobile communication terminal. The W-LAN system is implemented in a plurality of Base Transceiver Stations (BTSs) included in the 3G mobile communication network through the RoF link.

摘要翻译： 提供了一种用于通过光纤无线（RoF）链路互通无线局域网（W-LAN）和第三代（3G）移动通信网络的网络系统，以及在网络系统中互通的认证方法。 网络系统包括3G移动通信网络和W-LAN系统。 3G移动通信网络包括连接到公共交换电话网（PSTN）的语音信号处理网络，用于相对于预定移动终端进行语音呼叫处理，用于与预定移动终端进行数据通信的分组数据网络，以及终端设备 用于与预定的移动终端进行通信。 W-LAN系统连接到3G移动通信网络的分组数据网络，以向预定的移动通信终端提供W-LAN服务。 W-LAN系统通过RoF链路在3G移动通信网络中包括的多个基站收发台（BTS）中实现。

公开(公告)号：US20080056167A1

公开(公告)日：2008-03-06

申请号：US11737797

申请日：2007-04-20

申请人： Sang-Ho KIM ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Jae-Hun Cho ,  Jae-Hoon Lee

发明人： Sang-Ho KIM ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Jae-Hun Cho ,  Jae-Hoon Lee

IPC分类号： H04L5/14 ,  H04L5/16

CPC分类号： H04B10/25759 ,  H04W88/08 ,  H04W88/085

摘要： A radio-over-fiber (RoF) system and method for controlling a transmission time is provided. In a Time Division Duplex (TDD) wireless communication system comprising a Base Station (BS) having a donor and a remote connected thereto via am optical fiber, upstream and downstream Radio Frequency (RF) signals are transmitted and received, and by reliably transmitting a switch control signal to the remote and simultaneously compensating for a transmission time delay occurring in the optical cable, time synchronization of the upstream and downstream RF signals transmitted and received via antennas of the BS and the remote is controlled, thereby efficiently increasing the performance of a TDD wireless service system.

摘要翻译： 提供了一种用于控制传输时间的无线电光纤（RoF）系统和方法。 在包括具有供体的基站（BS）和经由光纤远程连接的基站（TDD）的时分双工（TDD）无线通信系统中，发送和接收上行和下行射频（RF）信号，并且通过可靠地发送 切换控制信号到远端，并同时补偿在光缆中发生的传输时延，控制通过BS和遥控器的天线发送和接收的上行和下行RF信号的时间同步，从而有效提高 TDD无线服务系统。