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51. 发明申请

US20070258432A1 Single wavelength Bi-directional RoF link apparatus for signal transmission in TDD wireless system 有权
标题翻译：单波长双向RoF链路设备，用于TDD无线系统中的信号传输
公开(公告)号：US20070258432A1
公开(公告)日：2007-11-08
申请号：US11642260
申请日：2006-12-20
申请人： Jae-Hoon Lee , Byung-Jik Kim , Seong-Taek Hwang , Sang-Ho Kim
发明人： Jae-Hoon Lee , Byung-Jik Kim , Seong-Taek Hwang , Sang-Ho Kim
IPC分类号： H04B7/212
CPC分类号： H04B10/25758 , H04B7/2606
摘要： A single wavelength bi-directional RoF link apparatus for signal transmission in a TDD wireless system includes a main donor for receiving an RF signal of downstream data from an upper layer, electrooptic converting the received RF signal to an optical signal, and transmitting the converted optical signal via an optical fiber in response to a TDD switching signal received from the upper layer, or receiving an optical signal of upstream data via the optical fiber, opto-electric converting the received optical signal to an RF signal in response to the TDD switching signal received from the upper layer, and transmitting the converted optical signal to the main donor; and a remote for receiving the optical signal of the downstream data via the optical fiber from the main donor, opto-electric converting the received optical signal to an RF signal, and emitting the converted RF signal to a terminal via an antenna in response to a TDD switching signal generated by a switch timing signal generation circuit, or receiving an RF signal of upstream data from the terminal, electro-optic converting the received RF signal to an optical signal in response to the TDD switching signal generated by the switch timing signal generation circuit, and transmitting the converted optical signal to the main donor via the optical fiber.
摘要翻译：在TDD无线系统中用于信号传输的单波长双向RoF链路装置包括：主要供体，用于从上层接收下行数据的RF信号，将所接收的RF信号电光转换成光信号，并将转换后的光响应于从上层接收的TDD切换信号，或经由光纤接收上行数据的光信号，经由光纤发送信号，响应于TDD切换信号将接收到的光信号光电转换为RF信号从上层接收，并将转换的光信号发送到主供体; 以及遥控器，用于经由来自主施体的光纤接收下行数据的光信号，将所接收的光信号光电转换成RF信号，并响应于一个天线经由天线将转换的RF信号发射到终端 TDD切换信号，或者从终端接收上行数据的RF信号，根据切换定时信号生成产生的TDD切换信号将接收的RF信号电光转换为光信号并且经由光纤将转换后的光信号发送到主供体。

52. 发明申请

US20070147273A1 ROF link system for supporting various services 有权
标题翻译： ROF链路系统支持各种业务
公开(公告)号：US20070147273A1
公开(公告)日：2007-06-28
申请号：US11633838
申请日：2006-12-05
申请人： Han-Lim Lee , Seong-Taek Hwang , Byung-Jik Kim , Gyu-Woong Lee , Hoon Kim , Jae-Hoon Lee , Yong-Gyoo Kim , Sang-Ho Kim , Sung-Kee Kim
发明人： Han-Lim Lee , Seong-Taek Hwang , Byung-Jik Kim , Gyu-Woong Lee , Hoon Kim , Jae-Hoon Lee , Yong-Gyoo Kim , Sang-Ho Kim , Sung-Kee Kim
IPC分类号： H04J3/00
CPC分类号： H04B10/25758 , H04H20/69 , H04H20/71 , H04W88/085 , H04W88/10
摘要： Disclosed is a radio-over-fiber (ROF) system for supporting various services, the system comprising: a central access platform (CAP) for providing time division duplexing (TDD), frequency division duplexing (FDD), and broadcasting services, converting a TDD downward signal and FDD/broadcasting downward signals into optical signals, respectively, transmitting the converted optical signals to a remote access unit (RAU), converting a TDD upward signal and an FDD upward signal, which have been transmitted as optical signals from the RAU, into electric signals, respectively, and using an optical circulator in order to separate upward and downward signals from each other; and the RAU for converting the TDD downward signal and FDD/broadcasting downward signals transmitted from the CAP into electric signals, respectively, converting the TDD upward signal and FDD upward signal to be transmitted to the CAP into optical signals, respectively, and using an optical circulator in order to separate upward and downward signals from each other, wherein the RAU includes a plurality of signal filtering/separating/combining units, which wirelessly emit the TDD downward signal and FDD/broadcasting downward signals, having been converted into electric signals, through an antenna, and which separate wirelessly-received TDD upward signal and FDD upward signal from each other.
摘要翻译：公开了用于支持各种业务的无线电光纤（ROF）系统，该系统包括：用于提供时分双工（TDD），频分双工（FDD）和广播服务的中央接入平台（CAP） TDD向下信号和FDD /广播向下信号分别转换成光信号，将转换后的光信号发送到远程接入单元（RAU），转换已经作为光信号从RAU发送的TDD上行信号和FDD向上信号分别变成电信号，并使用光循环器，以便彼此分离上下信号; 以及分别将从CAP发送的TDD向下信号和FDD /广播向下信号转换成电信号的RAU，分别将TDD向上信号和FDD向上信号转换为发送到CAP的光信号，并使用光循环器，以便彼此分离上下信号，其中RAU包括多个信号滤波/分离/组合单元，其经过转换成电信号无线地发射TDD向下信号和FDD /广播向下信号，通过天线，并且将无线接收的TDD上行信号和FDD上行信号彼此分离。

53. 发明授权

US07120848B2 Apparatus and method for forward error correction 有权
标题翻译：前向纠错装置及方法
公开(公告)号：US07120848B2
公开(公告)日：2006-10-10
申请号：US10358535
申请日：2003-02-05
申请人： Yong-Deok Kim , Yun-Je Oh , Jun-Ho Koh , Han-Lim Lee , Byung-Jik Kim , Chan-Youl Kim
发明人： Yong-Deok Kim , Yun-Je Oh , Jun-Ho Koh , Han-Lim Lee , Byung-Jik Kim , Chan-Youl Kim
IPC分类号： H03M13/00
CPC分类号： H04L1/0047
摘要： The provided forward error correction (FEC) apparatus for a transmission system includes a low pass filter (LPF) passing only a low frequency component of an input signal having a predetermined transmission rate; an AC power meter converting an energy value of an signal output from the LPF into a DC voltage value; a logarithm amplifier converting the exponentially varying DC voltage value from the AC power meter into a linear logarithmically varying DC voltage value; a digital signal processor (DSP) determining the transmission rate of the input signal according to a magnitude of the linear DC voltage value and outputting a control signal according to the transmission rate; a clock generator receiving the control signal and generating a clock signal according to the control signal; and a FEC module receiving the clock signal and performing FEC operation on the received signal. A method for FEC is also provided.
摘要翻译：所提供的用于传输系统的前向纠错（FEC）装置包括仅通过具有预定传输速率的输入信号的低频分量的低通滤波器（LPF）; 将从LPF输出的信号的能量值转换为DC电压值的AC功率计; 对数放大器将来自AC功率计的指数变化的DC电压值转换成线性对数变化的DC电压值; 数字信号处理器（DSP），根据线性DC电压值的大小确定输入信号的传输速率，并根据传输速率输出控制信号; 接收所述控制信号并根据所述控制信号产生时钟信号的时钟发生器; 以及FEC模块，接收时钟信号并对接收到的信号执行FEC操作。还提供了一种用于FEC的方法。

54. 发明申请

US20060216030A1 Optical add-drop multiplexer 审中-公开
标题翻译：光分插复用器
公开(公告)号：US20060216030A1
公开(公告)日：2006-09-28
申请号：US11390699
申请日：2006-03-28
申请人： Byung-Jik Kim , Sung-Bum Park , Seong-Taek Hwang
发明人： Byung-Jik Kim , Sung-Bum Park , Seong-Taek Hwang
IPC分类号： H04J14/02
CPC分类号： H04J14/0201
摘要： An optical add-drop multiplexer is disclosed. The optical add-drop multiplexer includes a first loop for dropping a first polarized light signal having a corresponding wavelength from a multiplexed downstream optical signal and adding a second polarized light signal having a corresponding wavelength to a multiplexed upstream optical signal and a second loop for adding a first polarized light signal having a corresponding wavelength to the downstream optical signal input from the first loop. An upstream optical signal is output in which a second polarized light signal having a corresponding wavelength is dropped from towards the first loop and the multiplezer also includes a Bragg grating placed between the first and second loops for reflecting the first and second polarized light signals having the corresponding wavelengths respectively towards the first and second loops.
摘要翻译：公开了一种光分插复用器。所述光分插复用器包括：第一回路，用于从多路复用的下行光信号中丢弃具有相应波长的第一偏振光信号，并将具有相应波长的第二偏振光信号与复用的上游光信号相加;以及第二循环，第一偏振光信号具有与从第一环路输入的下行光信号相对应的波长。输出上游光信号，其中具有相应波长的第二偏振光信号从第一环向下落，并且倍频器还包括放置在第一和第二环之间的布拉格光栅，用于反射具有第一和第二偏振光信号的第一和第二偏振光信号，相应的波长分别朝向第一和第二回路。

55. 发明授权

US07025575B2 Reciprocating compressor with vibration reducing plate 失效
标题翻译：具减震板的往复式压缩机
公开(公告)号：US07025575B2
公开(公告)日：2006-04-11
申请号：US10893365
申请日：2004-07-19
申请人： Ki Won Noh , Hyeong Seok Kim , Dong Han Kim , Byung Jik Kim , Hyung Jin Kim
发明人： Ki Won Noh , Hyeong Seok Kim , Dong Han Kim , Byung Jik Kim , Hyung Jin Kim
IPC分类号： F04B35/04
CPC分类号： F04B35/045
摘要： A reciprocating compressor includes a case to which a suction pipe and a discharge pipe are respectively connected, having a closed space; a reciprocating motor disposed inside the case, for generating a reciprocating force; a compressing unit receiving the reciprocating force generated from the reciprocating motor, for compressing a fluid; and a separation plate for dividing the closed space of the case into a low pressure portion into which a fluid is sucked through the suction pipe and a high pressure portion from which a fluid compressed in the compressing unit is discharged. Accordingly, the reciprocating compressor cuts off vibration generated from the compressing unit and the reciprocating motor and thus reduce the vibration transmitted to the compressor case and other elements so that noise can be reduced, life spans of other elements can be lengthened, and reliability of the compressor can be improved.
摘要翻译：往复式压缩机包括分别连接有吸入管和排出管的壳体，具有封闭空间; 设置在所述壳体内的往复式电动机，用于产生往复力; 压缩单元，接收从往复式电机产生的往复力，用于压缩流体; 以及用于将壳体的封闭空间分成通过吸入管吸入流体的低压部分和压缩单元中被压缩的流体从其排出的高压部分的分离板。因此，往复式压缩机切断从压缩单元和往复运动马达产生的振动，从而减少传递到压缩机壳体和其它元件的振动，从而可以减少噪音，延长其他元件的寿命，并且可靠性压缩机可以改善。

56. 发明授权

US06944405B2 Bit-rate-independent optical cross-connect device in optical transmission system 失效
标题翻译：光传输系统中的比特率独立光交叉设备
公开(公告)号：US06944405B2
公开(公告)日：2005-09-13
申请号：US09953637
申请日：2001-09-17
申请人： Han-Lim Lee , Byung-Jik Kim , Jun-Ho Koh , Seong-Taek Hwang , Yun-Je Oh
发明人： Han-Lim Lee , Byung-Jik Kim , Jun-Ho Koh , Seong-Taek Hwang , Yun-Je Oh
IPC分类号： H04B10/00 , H04B10/27 , H04Q3/52 , H04Q11/00 , H04Q11/04 , H04B10/08 , H04B17/00
CPC分类号： H04Q11/0005 , H04Q2011/0016 , H04Q2011/0024 , H04Q2011/0039 , H04Q2011/0045
摘要： This invention provides an optical transmission with a demultiplexer for demultiplexing an input optical signal into optical signals of different channels and a multiplexer for multiplexing the optical signals outputted from the demultiplexer. The optical cross-connect device includes: N BICDR (Bit Rate Independent Clock and Data Recovery) receivers each for receiving the associated optical signals outputted from the demultiplexer, for converting the associated optical signal into an electrical signal and reproducing clocks and data based on the bit rate of the electrical signal; a switchboard with a cross-connect switch for receiving output signals from the respective N BICDR receiver; N bit rate discriminating units for receiving the output signals from the N BICDR receivers, respectively, thereby outputting bit rate discriminating signals associated with the N BICDR receivers, respectively; a temperature sensing unit for outputting a temperature sensing signal; and, a central processing unit for receiving the bit rate discriminating signals from the N bit rate discriminating unit, along with the temperature sensing signal from the temperature sensing unit, for compensating each of the received bit rate discriminating signals with a temperature-dependent bit rate value read out, based on the temperature sensing signal, from a memory, and for controlling the bit rate of the associated BICDR receiver based on the compensated bit rate.
摘要翻译：本发明提供了一种具有解复用器的光传输器，用于将输入光信号解复用为不同信道的光信号，以及复用器，用于复用从解复用器输出的光信号。光交叉设备包括：N个BICDR（比特率独立时钟和数据恢复）接收机，每个接收器用于接收从解复用器输出的相关联的光信号，用于将相关联的光信号转换成电信号，并基于该信号再现时钟和数据比特率的电信号; 具有交叉连接开关的交换机，用于接收来自相应N BICDR接收机的输出信号; N比特率鉴别单元，用于分别从N个BICDR接收机接收输出信号，从而分别输出与N个BICDR接收机相关联的比特率鉴别信号; 用于输出温度感测信号的温度检测单元; 以及用于从温度感测单元接收来自N比特率鉴别单元的比特率鉴别信号的中央处理单元，用于以温度依赖比特率对每个接收的比特率鉴别信号进行补偿基于温度感测信号从存储器读出，并且用于基于补偿的比特率来控制相关联的BICDR接收器的比特率。

57. 发明授权

US06829436B2 Optical cross-connect device with transparency 失效
标题翻译：具有透明度的光学交叉连接设备
公开(公告)号：US06829436B2
公开(公告)日：2004-12-07
申请号：US09750365
申请日：2000-12-28
申请人： Jun-Ho Koh , Sang-Ho Kim , Byung-Jik Kim , Kwang-Jin Yang
发明人： Jun-Ho Koh , Sang-Ho Kim , Byung-Jik Kim , Kwang-Jin Yang
IPC分类号： H04J1402
CPC分类号： H04J3/0685 , H04J2203/0032 , H04J2203/0089 , H04L25/0262 , H04Q11/0005 , H04Q11/0478
摘要： A cross-connect device in an optical network which includes a demultiplexer for demultiplexing an input optical signal by channels; a plurality of arbitrary transmission optical receivers for converting the optical channel signals received from the demultiplexer to electrical signals and for recovering a clock signal and data according to a reference clock signal generated at the transmission rate of the electrical signals; a cross-connect switch for path-routing the electrical signals received from the arbitrary transmission optical receivers; a controller for controlling the path-routing of the cross-connect switch; a plurality of arbitrary transmission optical transmitters for converting the electrical signal received from each output port of the cross-connect switch to an optical signal; and, a multiplexer for multiplexing the optical signals received from the arbitrary transmission optical transmitters onto one stand of optical fiber.
摘要翻译：一种光网络中的交叉连接装置，包括用于通过信道解复用输入光信号的解复用器; 多个任意传输光接收机，用于将从解复用器接收的光信道信号转换为电信号，并根据以电信号的传输速率产生的参考时钟信号来恢复时钟信号和数据; 交叉连接开关，用于对从任意传输光接收器接收的电信号进行路径路由; 用于控制交叉连接交换机的路径路由的控制器; 多个任意传输光发射机，用于将从交叉连接交换机的每个输出端口接收的电信号转换为光信号; 以及多路复用器，用于将从任意传输光发射机接收的光信号复用到光纤的一个支架上。

58. 发明授权

US06396603B1 Monitoring the stability of the wavelength of a light signal in an optical communications system employing wavelength division multiplexing and having a wavelength stabilization circuit 失效
公开(公告)号：US06396603B1
公开(公告)日：2002-05-28
申请号：US09365250
申请日：1999-07-30
申请人： Byung-Jik Kim
发明人： Byung-Jik Kim
IPC分类号： H04J1402
CPC分类号： H04J14/02 , H04B10/504 , H04B10/572
摘要： A circuit for monitoring the stability of light signals in an optical communications system employing WDM and having a wavelength stabilization circuit, includes: a plurality of channel transmitters each having a laser diode for generating a light signal at a particular frequency under the control of a laser diode driver; a WDM device for multiplexing the wavelengths by wavelength division; a Fabry-Perot filter having resonant frequencies continuously arranged with given free spectral ranges according to the central frequencies specified for the channels to resonate an output of the WDM device; a photodetector for converting the output light signals of the Fabry-Perot filter into corresponding electrical signals, and a quadrature phase shifter for shifting the phase of the lot output signal of the photodetector by 90°. Each of the channel transmitters further includes: an oscillator for generating a dither signal of a frequency specified for the particular channel; a first PSD for effecting a phase sensitive detection of the dither signal and the output signal of the photodetector to generate an error signal corresponding to the first derivative signal of an Airy function; a first LPF for filtering the error signal to generate a first direct current voltage of a level representing the deviation of the output signal of the photodetector from the specified central frequency; an adder for adding the dither signal and first detected voltage to generate a bias signal supplied to the laser diode driver; a second PSD for effecting a phase sensitive detection of the dither signal and the output of the quadrature phase shifter to generate an intensity signal representing the intensity of the light signal transmitted by the WDM device; a second LPF for filtering the intensity signal to generate a second direct current voltage, and the monitor circuit monitoring the first and second detected voltages so as to indicate whether or not the wavelength of the light signal is stabilized based on the first and second detected voltages.

59. 发明授权

US06347169B1 Apparatus and method for monitoring optical signal 失效
标题翻译：用于监测光信号的装置和方法
公开(公告)号：US06347169B1
公开(公告)日：2002-02-12
申请号：US09482541
申请日：2000-01-14
申请人： Yong-Hoon Kang , Byung-Jik Kim
发明人： Yong-Hoon Kang , Byung-Jik Kim
IPC分类号： G02B628
CPC分类号： H04B10/077 , H04B10/07955 , H04J14/02
摘要： An apparatus and method of monitoring multiple channel signals of a wavelength division multiplexing (WDM) signal in a WDM system. The optical signal monitoring apparatus includes: an optical demultiplexer having 2N+2 output ports, for receiving and demultiplexing by wavelength a wavelength division multiplexing (WDM) signal with N wavelengths, and outputting two output port signals for each channel via the 2N output ports and outputting two adjacent signals via the +2 output ports needed to measure the optical signal noise ratio outside the frequency range of the WDM signal; a signal conversion unit for receiving the output port signals from the optical demultiplexer and converting the received optical output port signals into digital signals; and a signal processing unit for receiving the digital signals and calculating the wavelength and optical power for each channel using the loss characteristics of the two output port signals of each channel. Therefore, the information about the multiple channel signals, such as the optical power, the wavelength and the optical signal to noise ratio (OSNR), can be simultaneously and accurately obtained by using the optical signal monitoring apparatus constructed as a small module.
摘要翻译：一种在WDM系统中监视波分复用（WDM）信号的多信道信号的装置和方法。光信号监视装置包括：具有2N + 2个输出端口的光解复用器，用于通过波长接收和解复用具有N个波长的波分复用（WDM）信号，并且经由2N个输出端口为每个信道输出两个输出端口信号，以及通过+2个输出端口输出两个相邻信号，以测量WDM信号频率范围之外的光信号噪声比; 信号转换单元，用于从光解复用器接收输出端口信号并将接收到的光输出端口信号转换成数字信号; 以及信号处理单元，用于接收数字信号，并且使用每个通道的两个输出端口信号的损耗特性来计算每个通道的波长和光功率。因此，通过使用构成小模块的光信号监视装置，可以同时且准确地获得关于多路信号的信息，如光功率，波长和光信噪比（OSNR）。

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