公开(公告)号：US06909386B1

公开(公告)日：2005-06-21

申请号：US10858919

申请日：2004-06-02

申请人： Sung-Kee Kim ,  Han-Lim Lee ,  Seong-Taek Hwang

发明人： Sung-Kee Kim ,  Han-Lim Lee ,  Seong-Taek Hwang

IPC分类号： H04J3/00 ,  G11B20/10 ,  H03M5/02 ,  H04B10/2507 ,  H04B10/2513 ,  H04B10/516 ,  H04B10/524 ,  H04B10/54 ,  H04B10/588 ,  H04B10/61 ,  H03M1/00

CPC分类号： H03M5/02 ,  H04B10/505 ,  H04B10/5055 ,  H04B10/5167

摘要： An optical duo-binary transmission apparatus using an optical duo-binary transmission method is disclosed. The apparatus includes a duo-binary encoder that performs parallel processing. The duo-binary encoder includes a level change detection unit for detecting that levels of data input signals of N channels input at an nth input of channels change from 0 to 1, or from 1 to 0; a judgment unit for judging whether a number of level changes detected by the level change detection unit is odd or even; and a toggle unit for toggling an output signal of the judgment unit when the number of level change is odd. The encoder also includes an intermediate signal generation unit for determining whether phases of other channels are shifted or not, according to an data input signal on the basis of a predetermined channel of the N channels; and a phase division unit for dividing data into a first data group having non-shifted phases and a second data group which require a phase shift, according to an output signal of the intermediate signal generation unit and the data input signal, and outputting the divided first and second data groups.

摘要翻译： 公开了一种使用光二元传输方式的光二元传输装置。 该装置包括执行并行处理的二进制编码器。 二进制编码器包括电平变化检测单元，用于检测在信道的第n个输入端输入的N个信道的数据输入信号的电平从0变化到1，或从1变为0; 判断单元，用于判断由电平变化检测单元检测到的电平变化的数量是奇数还是偶数; 以及切换单元，用于当电平变化次数为奇数时切换判断单元的输出信号。 编码器还包括中间信号产生单元，用于根据N个信道的预定信道根据数据输入信号来确定其它信道的相位是否移位; 以及相位分割单元，根据中间信号生成单元的输出信号和数据输入信号，将数据分割为具有非移相的第一数据组和需要相移的第二数据组，并输出分割 第一和第二数据组。

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：US07949360B2

公开(公告)日：2011-05-24

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： H03C7/02 ,  H04M1/00 ,  H04L27/00 ,  H01Q3/00 ,  H04B7/185 ,  H04B7/02 ,  H04B7/00 ,  H04B1/02 ,  H04B17/00 ,  H04B1/66 ,  H04B3/46

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：US07630694B2

公开(公告)日：2009-12-08

申请号：US11395806

申请日：2006-03-31

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

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

IPC分类号： H01Q11/12

CPC分类号： H04L5/26 ,  H04B10/25758 ,  H04W16/26

摘要： Disclosed is a remote access unit for transmitting and receiving upstream and downstream data in which channels having different transmission scheme are multiplexed, and an optical network for bi-directional wireless communication using same. The remote access unit includes an antenna for receiving the downstream data and wirelessly transmitting same and for receiving the upstream data and providing same to the remote access unit, a switch for outputting downstream time division channels of the downstream data to the antenna and for receiving upstream time division channels of the upstream data from the antenna, and a controller for controlling the switch in order to prevent the upstream and downstream time division channels from overlapping.

摘要翻译： 公开了一种用于发送和接收上行和下行数据的远程访问单元，其中具有不同传输方案的信道被复用，以及用于使用其的双向无线通信的光网络。 远程接入单元包括：天线，用于接收下行数据并进行无线发送，并用于接收上行数据并将其提供给远程接入单元;开关，用于向下游天线输出下游数据的下行时分信道​​，并用于接收上游 来自天线的上行数据的时分信道，以及用于控制交换机的控制器，以防止上游和下游时分信道重叠。

公开(公告)号：US20080260388A1

公开(公告)日：2008-10-23

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 ,  H04J3/00

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 controlls 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：US20080205538A1

公开(公告)日：2008-08-28

申请号：US12034723

申请日：2008-02-21

申请人： Shuangfeng HAN ,  Seong-Taek Hwang ,  Han-Lim Lee

发明人： Shuangfeng HAN ,  Seong-Taek Hwang ,  Han-Lim Lee

IPC分类号： H04B7/12

CPC分类号： H04L1/20 ,  H04B7/0443 ,  H04L1/0618 ,  Y02D70/444

摘要： A method for Symbol Error Rate (SER) approximation of an SER-based transmission power allocation operation for an Orthogonal Space Time Block Code in a DWCS equipped with multiple transmission Distributed Antennas (DA) geographically dispersed at random. The method for SER approximation includes the steps of: setting multiple combinable antenna subsets from the multiple DAs; selecting a quasi-optimal antenna subset Ag (1≦g≦2n−1) having a quasi-optimal power allocation weight wg based on predetermined power allocation, for each of the set multiple antenna subsets; and calculating an SER approximation value of the selected quasi-optimal antenna subset by applying a Probability Density Function (PDF) of a Signal-to-Noise Ratio (SNR) to the OSTBC SER having symbol constellation of a predetermined modulation scheme. The output of the SER approximation value can be output to a transmitter, or to a space-time encoder of a central processor for optimal power transmission.

摘要翻译： 一种用于在配备有随机分布的多传输分布式天线（DA）的DWCS中的正交空间时间块码的基于SER的发射功率分配操作的符号误码率（SER）近似方法。 SER近似的方法包括以下步骤：从多个DA设置多个可组合天线子集; 选择具有准最优功率分配权重w（g）的准最优天线子集A 1（1 <= G 2 = 基于预定功率分配，对于所设置的多个天线子集中的每一个; 以及通过将具有信号噪声比（SNR）的概率密度函数（PDF））应用于具有预定调制方案的符号星座图的OSTBC SER来计算所选择的准最佳天线子集的SER近似值。 SER近似值的输出可以输出到中央处理器的发射机或时空编码器，以实现最佳的功率传输。

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：US20070127931A1

公开(公告)日：2007-06-07

申请号：US11607701

申请日：2006-12-01

申请人： Hoon Kim ,  Sung-Kee Kim ,  Han-Lim Lee ,  Seong-Taek Hwang

发明人： Hoon Kim ,  Sung-Kee Kim ,  Han-Lim Lee ,  Seong-Taek Hwang

IPC分类号： H04B10/04 ,  H04B10/12

CPC分类号： H04B10/40

摘要： Disclosed is an optical transceiver module for modulating a binary signal into an optical signal and outputting the optical signal. In one aspect, the optical transceiver module comprises a tap for dividing a binary signal into first and second binary signals, a laser source for frequency-modulating the first binary signal divided by the tap, and an intensity modulator for modulating the second binary signal divided by the tap and the frequency-modulated signal of the laser source into a phase-inverted optical signal.

摘要翻译： 公开了一种用于将二进制信号调制成光信号并输出​​光信号的光收发模块。 一方面，光收发器模块包括用于将二进制信号分成第一和第二二进制信号的抽头，用于对由分接头划分的第一二进制信号进行频率调制的激光源和用于调制分频的第二二进制信号的强度调制器 通过抽头和激光源的调频信号变为相位反转的光信号。

公开(公告)号：US20070046836A1

公开(公告)日：2007-03-01

申请号：US11504858

申请日：2006-08-16

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

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

IPC分类号： H04N5/50

CPC分类号： H04B10/2575

摘要： Disclosed is an ROF link apparatus for selecting an IF band in order to process various service signals through an MMF, which including transmitters for receiving the service signals, performing IF modulation for the service signals, and transferring the modulated IF signals, a first controller for scanning frequency characteristics of the MMF, searching for flat frequency bands, and transferring information regarding the flat frequency band, thereby controlling IF modulation to be performed, a link unit for combining the IF signals with output signals of the first controller, converting the combined signals into optical signals, transmitting the optical signals, converting the optical signals into electrical signals, and splitting the electrical signals, a second controller for receiving the output signals of the first controller, detecting information regarding the flat frequency band, and transferring the information to receivers, thereby controlling modulation to be performed, and the receivers for receiving the IF modulated signals, receiving the information from the second controller, and performing RF modulation.

摘要翻译： 公开了一种用于选择IF频带以便通过MMF处理各种服务信号的ROF链路装置，该MMF包括用于接收服务信号的发射机，对服务信号执行IF调制，以及传送调制的IF信号，第一控制器 MMF的扫描频率特性，搜索平坦频带，以及传送关于平坦频带的信息，由此控制要执行的IF调制;用于将IF信号与第一控制器的输出信号组合的链路单元，转换组合信号 传输光信号，将光信号转换为电信号，分割电信号;第二控制器，用于接收第一控制器的输出信号，检测关于平坦频带的信息，以及将信息传送到接收机 ，从而控制要进行的调制 用于接收IF调制信号的接收机，从第二控制器接收信息，并执行RF调制。

公开(公告)号：US07060970B2

公开(公告)日：2006-06-13

申请号：US10688496

申请日：2003-10-17

申请人： Hee-Won Cheung ,  Seong-Taek Hwang ,  Han-Lim Lee ,  Byung-Chang Kang

发明人： Hee-Won Cheung ,  Seong-Taek Hwang ,  Han-Lim Lee ,  Byung-Chang Kang

IPC分类号： H01J40/14 ,  H01J7/24

CPC分类号： H01L31/02027 ,  H02M3/156

摘要： Disclosed is a temperature-compensating device for an APD optical-receiver system using an APD (Avalanche Photo Diode). The device includes a temperature-compensating circuit which employs a digital potentiometer capable of linear compensation through data look-up in compensating the decrease in gain caused by the temperature change of the APD.

摘要翻译： 公开了一种使用APD（雪崩光电二极管）的APD光接收机系统的温度补偿装置。 该装置包括温度补偿电路，其采用能够通过数据查找线性补偿的数字电位器来补偿由APD的温度变化引起的增益的降低。