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：US07215892B2

公开(公告)日：2007-05-08

申请号：US10638814

申请日：2003-08-11

申请人： Han-Lim Lee ,  Seong-Taek Hwang ,  Hee-Won Cheung ,  Yun-Je Oh ,  Ji-Chai Jeong ,  Byung-Chang Kang

发明人： Han-Lim Lee ,  Seong-Taek Hwang ,  Hee-Won Cheung ,  Yun-Je Oh ,  Ji-Chai Jeong ,  Byung-Chang Kang

IPC分类号： H04B10/04

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

摘要： Disclosed is a duobinary optical transmitter, which includes a laser source for outputting light with a predetermined wavelength; a Mach-Zehnder interferometer-type optical intensity modulator for modulating the intensity of the light according to a three-level data signal inputted through a modulation terminal; a low-pass filter for converting an inputted two-level binary data signal into a three-level data signal through an interference among codes; and, a modulator driver/amplifier for amplifying the three-level data signal and then outputting it to the modulation terminal, wherein the overall bandwidth of the low-pass filter, the modulator driver/amplifier, and the optical intensity modulator corresponds to approximately ¼ of the clock frequency of the two-level binary data signal.

摘要翻译： 公开了一种双向光学发射机，其包括用于输出具有预定波长的光的激光源; 用于根据通过调制端子输入的三电平数据信号来调制光强度的马赫 - 曾德干涉仪型光强度调制器; 低通滤波器，用于通过码之间的干扰将输入的二电平二进制数据信号转换为三电平数据信号; 以及用于放大三电平数据信号然后将其输出到调制终端的调制器驱动器/放大器，其中低通滤波器，调制器驱动器/放大器和光强度调制器的总带宽对应于大约1/4 的二级二进制数据信号的时钟频率。

公开(公告)号：US20070182655A1

公开(公告)日：2007-08-09

申请号：US11601422

申请日：2006-11-17

申请人： Han-Lim Lee ,  Seong-Taek Hwang ,  Sung-Hun Kim ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Jung-Woo Baik

发明人： Han-Lim Lee ,  Seong-Taek Hwang ,  Sung-Hun Kim ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Jung-Woo Baik

IPC分类号： H01Q11/10

CPC分类号： H01Q11/105

摘要： Disclosed is a broadband log-periodic dipole antenna, which has first and second radiating elements alternately and symmetrically arranged in both surfaces of a dielectric substrate according to the corresponding PCS frequency band, IMT-2000 frequency band, and wireless LAN (IEEE 802, 11a/b) frequency band, so that the first and second radiating elements are alternately supplied with signals to make the impedance matching, thereby producing high gain in each of the resonant frequency bands and preventing the distortion of the radiating patterns owing to the broadband characteristics. The arrangement of the first and second radiating elements in both surfaces of the dielectric substrate considerably also reduces the size of the antenna, thereby facilitating mass production with low cost.

摘要翻译： 公开了一种宽带对数周期偶极天线，其具有根据相应的PCS频带，IMT-2000频带和无线LAN在电介质基板的两个表面中交替地和对称地布置的第一和第二辐射元件（IEEE 802,11a / b）频带，使得第一和第二辐射元件交替地提供信号以使阻抗匹配，从而在每个谐振频带中产生高增益，并且由于宽带特性而防止辐射图案的失真。 第一和第二辐射元件在电介质衬底的两个表面中的布置显着地减小了天线的尺寸，从而以低成本促进了批量生产。

公开(公告)号：US20070058978A1

公开(公告)日：2007-03-15

申请号：US11519613

申请日：2006-09-12

申请人： Han-Lim Lee ,  Seong-Taek Hwang ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Ho-Deok Jang ,  Sub Hur

发明人： Han-Lim Lee ,  Seong-Taek Hwang ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Ho-Deok Jang ,  Sub Hur

IPC分类号： H04B10/00

CPC分类号： H04B10/25758 ,  H04W4/18 ,  H04W88/04 ,  H04W88/085

摘要： A wireless remote access base station for converting a downstream optical signal to a downstream radio frequency (RF) signal, transmitting the converted downstream RF signal wirelessly, converting a received upstream RF signal to an upstream optical signal, and transmitting the upstream optical signal is provided. The remote base station includes: an electro-absorption modulator (EAM) for converting a downstream optical signal to a downstream RF signal and an upstream RF signal to an upstream optical signal; an antenna for transmitting the downstream RF signal wirelessly and outputting the upstream RF signal received wirelessly to the EAM; and an amplifier, which is located between the EAM and the antenna, amplifies the downstream RF signal and outputs the amplified downstream RF signal to the antenna.

摘要翻译： 一种用于将下行光信号转换为下行射频（RF）信号的无线远程接入基站，将经转换的下行RF信号无线发送，将接收的上行RF信号转换为上行光信号，并发送上行光信号 。 远程基站包括：用于将下行光信号转换为下行RF信号的电吸收调制器（EAM），以及将上行RF信号转换为上行光信号; 用于无线地发送下行RF信号并将无线接收的上行RF信号输出到EAM的天线; 并且位于EAM和天线之间的放大器放大下游RF信号，并将放大的下行RF信号输出到天线。

公开(公告)号：US07653313B2

公开(公告)日：2010-01-26

申请号：US11519613

申请日：2006-09-12

申请人： Han-Lim Lee ,  Seong-Taek Hwang ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Ho-Deok Jang ,  Sub Hur

发明人： Han-Lim Lee ,  Seong-Taek Hwang ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Ho-Deok Jang ,  Sub Hur

IPC分类号： H04B10/00

CPC分类号： H04B10/25758 ,  H04W4/18 ,  H04W88/04 ,  H04W88/085

摘要： A wireless remote access base station for converting a downstream optical signal to a downstream radio frequency (RF) signal, transmitting the converted downstream RF signal wirelessly, converting a received upstream RF signal to an upstream optical signal, and transmitting the upstream optical signal is provided. The remote base station includes: an electro-absorption modulator (EAM) for converting a downstream optical signal to a downstream RF signal and an upstream RF signal to an upstream optical signal; an antenna for transmitting the downstream RF signal wirelessly and outputting the upstream RF signal received wirelessly to the EAM; and an amplifier, which is located between the EAM and the antenna, amplifies the downstream RF signal and outputs the amplified downstream RF signal to the antenna.

摘要翻译： 一种用于将下行光信号转换为下行射频（RF）信号的无线远程接入基站，将经转换的下行RF信号无线发送，将接收的上行RF信号转换为上行光信号，并发送上行光信号 。 远程基站包括：用于将下行光信号转换为下行RF信号的电吸收调制器（EAM），以及将上行RF信号转换为上行光信号; 用于无线地发送下行RF信号并将无线接收的上行RF信号输出到EAM的天线; 并且位于EAM和天线之间的放大器放大下游RF信号，并将放大的下行RF信号输出到天线。

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：US08059963B2

公开(公告)日：2011-11-15

申请号：US12105499

申请日：2008-04-18

申请人： Sang-Ho Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Han-Lim Lee ,  Ki-Uk Song

发明人： Sang-Ho Kim ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Han-Lim Lee ,  Ki-Uk Song

IPC分类号： H04B10/00

CPC分类号： H04B10/25753 ,  H04W4/18 ,  H04W88/04

摘要： A wired relay method for using a remote station and an apparatus thereof for a Radio over Fiber (RoF) wired relay system supporting a Time Division Duplexing (TDD) wireless communication service, which shares an Low-Noise Amplifier (LNA) for both uplink and downlink operations. The remote station includes a block for dividing each of a downlink optical signal carrying service data and an optical signal carrying transmission/reception control information of the RoF wired relay system, which are input from a base station, a gain controller for separating an uplink Radio Frequency (RF) signal input from an antenna or a portion of a downlink RF signal output from a High-Power Amplifier (HPA) and for monitoring the strength of the input and output RF signals in order to control a gain of the LNA. A converter mutually converts an optical signal and an RF signal, an amplifier amplifies the converted RF signal, and an RF signal flow controller automatically controls uplink and downlink transmission paths of the amplified RF signal according to a transmission/reception status of the RoF wired relay system.

摘要翻译： 一种用于使用远程站的有线中继方法及其装置，用于支持时分双工（TDD）无线通信业务的无线电光纤（RoF）有线中继系统，该无线通信业务共享用于上行链路和/或上行链路的低噪声放大器（LNA） 下行操作。 远程站包括：用于分配来自基站输入的携带服务数据的下行链路光信号和携带RoF有线中继系统的发送/接收控制信息的光信号的块，用于分离上行链路无线电的增益控制器 从天线输入的频率（RF）信号或从大功率放大器（HPA）输出的下行链路RF信号的一部分输入，并用于监视输入和输出RF信号的强度，以便控制LNA的增益。 A转换器相互转换光信号和RF信号，放大器放大转换的RF信号，RF信号流控制器根据RoF有线继电器的发送/接收状态自动控制放大的RF信号的上行链路和下行链路传输路径 系统。

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：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。