公开(公告)号：US08791857B2

公开(公告)日：2014-07-29

申请号：US13253580

申请日：2011-10-05

申请人： Sang Hyun Mo ,  Heyung Sub Lee ,  Jae Heum Lee ,  Seung-Il Myong ,  Hoe-Sung Yang ,  Kang Bok Lee ,  Cheol Sig Pyo

发明人： Sang Hyun Mo ,  Heyung Sub Lee ,  Jae Heum Lee ,  Seung-Il Myong ,  Hoe-Sung Yang ,  Kang Bok Lee ,  Cheol Sig Pyo

IPC分类号： G01S19/11

CPC分类号： G01S19/11

摘要： To track the location of a terminal in an indoor space by using a pseudo GPS signal transmitter, a GPS signal sent from an artificial satellite is received, and a clock signal of the artificial satellite is extracted from the received GPS signal to perform synchronization with the artificial satellite. Once synchronization with the artificial satellite is performed, a pseudo GPS signal is generated, and the transmission time of the pseudo GPS signal is controlled. The GPS signal is sent to the terminal located in the indoor space by a plurality of transmitting antennas based on the controlled transmission time, thereby enabling the terminal located in the indoor space to track its location.

摘要翻译： 为了通过使用伪GPS信号发送器在室内追踪终端的位置，接收从人造卫星发送的GPS信号，并从接收到的GPS信号中提取人造卫星的时钟信号，以与 卫星。 一旦执行与人造卫星的同步，就产生伪GPS信号，并且控制伪GPS信号的发送时间。 基于受控的发送时间，通过多个发送天线将GPS信号发送到位于室内空间的终端，由此能够使位于室内空间的终端跟踪其位置。

公开(公告)号：US08787514B2

公开(公告)日：2014-07-22

申请号：US13003374

申请日：2008-12-31

申请人： Seung Il Myong ,  Jong Sub Cha ,  Sang Hyun Mo ,  Jae Heum Lee ,  Heyung Sub Lee ,  Jong Suk Chae

发明人： Seung Il Myong ,  Jong Sub Cha ,  Sang Hyun Mo ,  Jae Heum Lee ,  Heyung Sub Lee ,  Jong Suk Chae

IPC分类号： H04L27/10

CPC分类号： H04J13/10 ,  H04B1/707 ,  H04J13/0022

摘要： An apparatus and method of generating a pseudo noise (PN) code is provided. The apparatus for generating the PN code includes: a memory device unit including a plurality of memory devices; an exclusive-OR (XOR) operation unit receiving output values of at least two memory devices among output values of the plurality of memory devices to output an XOR operation value with respect to the received output values; and a PN code generation unit generating the PN code based on an output value of the XOR operation unit.

摘要翻译： 提供了一种产生伪噪声（PN）码的装置和方法。 用于产生PN码的装置包括：包括多个存储装置的存储装置单元; 异或（XOR）操作单元，在多个存储器件的输出值之间接收至少两个存储器件的输出值，以相对于所接收的输出值输出异或运算值; 以及PN代码生成单元，其基于所述异或运算单元的输出值生成所述PN码。

公开(公告)号：US07212741B2

公开(公告)日：2007-05-01

申请号：US10436909

申请日：2003-05-13

申请人： Seung Il Myong ,  Jyung Chan Lee ,  Je Soo Ko

发明人： Seung Il Myong ,  Jyung Chan Lee ,  Je Soo Ko

IPC分类号： H04B10/08 ,  H04B10/06

CPC分类号： H04B10/695 ,  H04B10/0799 ,  H04B10/69 ,  H04L1/0047 ,  H04L25/063

摘要： Optical signals transmitted through an optical cable are converted into digital data of bits “1” and “0” on the basis of a reference voltage, and errors generated during transmission of the optical signals are corrected using Forward Error Correction (FEC). A method includes extracting numbers of occurrence of errors for bits “1” and “0” recovered through the FEC. Thereafter, the extracted numbers of occurrence of errors for bits “1” and “0” are compared with each other. A reference voltage used to judge levels of the signals to be level “1” or “0” is controlled if the numbers of occurrence of errors for bits “1” and “0” are not equal to each other. The current reference voltage is maintained if the numbers of occurrence of errors for bits “1” and “0” are rendered equal to each other.

摘要翻译： 通过光缆发送的光信号基于参考电压被转换成位“1”和“0”的数字数据，并且使用前向纠错（FEC）校正在光信号的传输期间产生的错误。 一种方法包括提取通过FEC恢复的比特“1”和“0”的错误出现次数。 此后，将提取的位“1”和“0”的错误出现次数进行比较。 如果位“1”和“0”的错误出现次数不相等，则控制用于判断信号为“1”或“0”电平的参考电压。 如果将比特“1”和“0”的错误出现次数相等，则保持当前参考电压。

公开(公告)号：US06888670B2

公开(公告)日：2005-05-03

申请号：US10364635

申请日：2003-02-11

申请人： Wang-yuhl Oh ,  Seung-il Myong ,  Hyun-jae Lee

发明人： Wang-yuhl Oh ,  Seung-il Myong ,  Hyun-jae Lee

IPC分类号： G02B6/00 ,  H01S3/00 ,  H01S3/067 ,  H01S3/094 ,  H01S3/16 ,  H01S3/23 ,  H01S3/30

CPC分类号： H01S3/302 ,  H01S3/06725 ,  H01S3/06758 ,  H01S3/094011 ,  H01S3/094096 ,  H01S3/1608 ,  H01S3/2375 ,  H01S2301/04

摘要： A low-noise optical fiber amplifier for performing a long-distance optical transmission in a wavelength division multiplexing optical transmission apparatus is provided. This amplifier includes a first optical fiber amplifier having a pre-stage optical fiber, and a first coupler for supplying pump light to the pre-stage optical fiber; a dispersion compensating Raman amplifier (DCRA) connected to the first optical fiber amplifier and having a dispersion compensating optical fiber (DCF) that compensates for the dispersion accumulated in an optical line and generates a Raman gain, and a second coupler for supplying Raman pump light onto the DCF; and a second optical fiber amplifier connected to the DCRA, and including a post-stage optical fiber and a third coupler for supplying pump light onto the post-stage optical fiber. Accordingly, this optical fiber amplifier is used for terrestrial WDM optical transmission, and thus has remarkably low noise figure compared to the existing optical amplifiers. For this reason, the optical fiber amplifier is available in long-distance transmission, and can be used in optical networks.

摘要翻译： 提供了一种用于在波分复用光传输装置中执行长距离光传输的低噪声光纤放大器。 该放大器包括具有前级光纤的第一光纤放大器和用于向前级光纤提供泵浦光的第一耦合器; 连接到第一光纤放大器的色散补偿拉曼放大器（DCRA），并且具有补偿在光线路中累积的色散并产生拉曼增益的色散补偿光纤（DCF），以及用于提供拉曼泵浦光的第二耦合器 到DCF; 以及连接到DCRA的第二光纤放大器，并且包括用于将泵浦光提供到后级光纤上的后级光纤和第三耦合器。 因此，该光纤放大器用于地面WDM光传输，因此与现有的光放大器相比具有非常低的噪声系数。 因此，光纤放大器可用于远距离传输，可用于光网络。

公开(公告)号：US08401053B2

公开(公告)日：2013-03-19

申请号：US12562105

申请日：2009-09-17

申请人： Jong-sub Cha ,  Seung-il Myong ,  Heyung-sub Lee ,  Sang-hyun Mo ,  Jong-suk Chae

发明人： Jong-sub Cha ,  Seung-il Myong ,  Heyung-sub Lee ,  Sang-hyun Mo ,  Jong-suk Chae

IPC分类号： H04B1/00

CPC分类号： H04J13/10 ,  H04B1/707 ,  H04J13/0022

摘要： An active radio frequency identification (RFID) apparatus having an additional transmitter in addition to a single transmitter is provided. The active RFID apparatus includes a first transmitter including a first pseudo noise (PN) code generator to generate a direct sequence spread spectrum (DSSS) introduced by ISO/IEC (International Organization for Standardization/International Electrotechnical Commission) 24730-2 or ISO/IEC 18185-5 type B; and a second transmitter including a second PN code generator to perform an AND operation on an initial value and a fed back value and shift the resultant value of the AND operation, to perform an XOR operation on particular bits from among the shifted bits and to perform an XOR operation again on the shifted bits and the resulting value of the XOR operation to finally generate a PN code. Accordingly, where an additional PN code is added besides an existing PN code, a PN code having excellent auto correlation characteristics allowing discrimination of the PN code itself and cross-correlation characteristics providing a code discrimination ability with respect to another code can be generated.

摘要翻译： 提供了除了单个发射机之外还具有附加发射机的有源射频识别（RFID）装置。 有源RFID装置包括第一发射机，其包括第一伪噪声（PN）码发生器，以产生由ISO / IEC（国际标准化组织/国际电工委员会）24730-2或ISO / IEC引入的直接序列扩频（DSSS） 18185-5型B; 以及第二发送器，包括第二PN码发生器，用于对初始值和反馈值执行AND运算，并且移位AND运算的结果值，以对从移位中的特定比特执行异或运算，并执行 对移位的位再次进行XOR操作，并且产生XOR运算的结果值，以最终生成PN码。 因此，除了现有的PN码之外附加附加的PN码，可以产生具有能够区分PN码本身的优良自相关特性的PN码和提供相对于其他码的码识别能力的互相关特性。

公开(公告)号：US07769303B2

公开(公告)日：2010-08-03

申请号：US11635712

申请日：2006-12-07

申请人： Seung Il Myong ,  Hyung Joo Kim ,  Jong Hyun Lee

发明人： Seung Il Myong ,  Hyung Joo Kim ,  Jong Hyun Lee

IPC分类号： H04B10/04

CPC分类号： H04B10/5051 ,  H04B10/505 ,  H04B10/508

摘要： Provided are an apparatus and a method for generating a return-to-zero (RZ) signal, including: a first modulator receiving a first signal having a predetermined frequency to modulate, compensate for and output a first laser beam; a second modulator receiving a second signal complementary to the first signal to modulate, compensate for, and output a second laser beam; a mixer mixing signals output from the first and second modulators to output a third signal; and a third modulator modulating the third signal into an RZ signal and outputting the RZ signal.

摘要翻译： 提供了一种用于产生归零（RZ）信号的装置和方法，包括：第一调制器，接收具有预定频率的第一信号以调制，补偿和输出第一激光束; 接收与所述第一信号互补的第二信号以调制，补偿和输出第二激光束的第二调制器; 混合从第一和第二调制器输出的信号以输出第三信号; 以及将第三信号调制成RZ信号并输出​​RZ信号的第三调制器。

公开(公告)号：US07366411B2

公开(公告)日：2008-04-29

申请号：US10693058

申请日：2003-10-23

申请人： Yun-Hee Cho ,  Seung-Il Myong ,  Jyung-Chan Lee ,  Yool Kwon

发明人： Yun-Hee Cho ,  Seung-Il Myong ,  Jyung-Chan Lee ,  Yool Kwon

IPC分类号： H04B10/08

CPC分类号： H04B10/00

摘要： The method for operating an optical transponder, which performs maintenance of a signal in the optical transponder having a digital wrapper in an optical transmission system including multiple layers, includes (a) calling a processor for processing an interrupt when the interrupt is generated from the digital wrapper according to monitoring of a received signal; (b) the called processor detecting what defect is generated in the received signal and detecting whether or not the received signal requires maintenance; (c) performing defect processing in the case that a defect is detected at (b) or is cancelled; and (d) controlling the digital wrapper according to the defect and maintenance processing result.

摘要翻译： 在包括多层的光传输系统中执行在具有数字封装的光转发器中进行信号维护的光转发器的方法包括：（a）当从数字信号产生中断时，调用处理器来处理中断 根据接收信号的监测，包装纸; （b）被叫处理器检测在接收信号中产生什么缺陷并检测接收到的信号是否需要维护; （c）在（b）中检测到缺陷或被取消的情况下执行缺陷处理; 和（d）根据缺陷和维护处理结果控制数字包装纸。

公开(公告)号：US07313333B2

公开(公告)日：2007-12-25

申请号：US10815064

申请日：2004-03-31

申请人： Jyung Chan Lee ,  Seung Il Myong ,  Joon Ki Lee ,  Kwang Joon Kim

发明人： Jyung Chan Lee ,  Seung Il Myong ,  Joon Ki Lee ,  Kwang Joon Kim

IPC分类号： H04B10/06

CPC分类号： H04B10/695

摘要： Disclosed herein is an apparatus for controlling a decision threshold voltage to an optical receiver, which is capable of automatically controlling the decision threshold voltage to the optical receiver appropriately to signal level decision on the basis of a low-frequency band signal component of an output signal from the optical receiver. The apparatus is adapted to control the level of the decision threshold voltage to the optical receiver, which converts an input optical signal into an electrical signal. To this end, the apparatus comprises a voltage detector for branching off part of the output signal from the optical receiver and detecting a corresponding voltage, a differential comparator for comparing the voltage detected by the voltage detector with a reference voltage inputted thereto and outputting the resulting differential voltage, a low pass filter for filtering the differential voltage from the differential comparator at a predetermined low frequency band and supplying the resulting voltage as the threshold voltage to the optical receiver, and a voltage controller for controlling the reference voltage to the differential comparator on the basis of a differential voltage between the threshold voltage from the low pass filter and a predetermined voltage corresponding to a predetermined minimum bit error rate.

摘要翻译： 本文公开了一种用于控制光接收机的判定阈值电压的装置，其能够基于输出信号的低频带信号分量自动控制对光接收器的判定阈值电压以适当地进行信号电平判定 从光接收机。 该装置适于控制光接收器的判定阈值电平的电平，光接收器将输入光信号转换为电信号。 为此，该装置包括用于将来自光接收器的输出信号的一部分分支并检测相应电压的电压检测器，用于将由电压检测器检测到的电压与输入到其的参考电压进行比较的差分比较器， 差分电压，低通滤波器，用于在预定的低频带对差分比较器的差分电压进行滤波，并将得到的电压作为阈值电压提供给光接收器;以及电压控制器，用于控制差分比较器的参考电压 来自低通滤波器的阈值电压与对应于预定最小误码率的预定电压之间的差分电压的基础。

公开(公告)号：US07068422B2

公开(公告)日：2006-06-27

申请号：US10392614

申请日：2003-03-19

申请人： Jyung-chan Lee ,  Seung-il Myong ,  Moo-jung Chu ,  Hyun-jae Lee

发明人： Jyung-chan Lee ,  Seung-il Myong ,  Moo-jung Chu ,  Hyun-jae Lee

IPC分类号： H04B10/12

CPC分类号： H04B10/2942

摘要： Provided are an optical fiber amplification method and apparatus for controlling a gain. Initial values including target gains of first and second amplifications for an optical amplifier amplifying the input light signal are set. Power of the input light signal is measured and the power of first and second backward pump lights proceeding in the opposite direction to the input light signal is controlled based on the measured power. The input light signal is firstly amplified and a first amplification gain of the amplified light signal is calculated. Power of a first forward pump light proceeding in the same direction as the input light signal is controlled so that the first amplification gain can be substantially equal to the target gain of the first amplification. The firstly amplified light signal is secondly amplified and a second amplification gain with respect to the input light signal is calculated. The power of a second forward pump light proceeding in the same direction as the input light signal is controlled so that the second amplification gain can be substantially equal to the target gain of the second amplification.

公开(公告)号：US20100214067A1

公开(公告)日：2010-08-26

申请号：US12646784

申请日：2009-12-23

申请人： Sang-Hyun Mo ,  Jae-Heum Lee ,  Seung-Il Myong ,  Hoe-Sung Yang ,  Heyung-Sub Lee ,  Jong-Suk Chae ,  Jongsub Cha ,  Kang-Bok Lee ,  Dong-Beom Shin

发明人： Sang-Hyun Mo ,  Jae-Heum Lee ,  Seung-Il Myong ,  Hoe-Sung Yang ,  Heyung-Sub Lee ,  Jong-Suk Chae ,  Jongsub Cha ,  Kang-Bok Lee ,  Dong-Beom Shin

IPC分类号： H04Q5/22

CPC分类号： H04W64/00 ,  H04B5/0062 ,  H04Q2213/13095

摘要： Provided are a Radio Frequency Identification (RFID) tag and apparatus and method for locating a RFID tag without comparing arrival times of blink signals transmitted from the RFID tag in order to quickly trace a location of the RFID tag. The RFID tag includes a tag ID generator configured to generate a tag ID of the RFID tag, a blink generator configured to generate a plurality of sub-blink signals that form the blink signal, a sub-blink ID generator configured to generate sub-blink IDs for the generated sub-blink signals, a sub-blink ID inserter configured to insert the generated sub-blink IDs into the sub-blink signals, and a transmitter configured to transmit the blink signal having the tag ID and the sub-blink IDs.

摘要翻译： 提供了一种用于定位RFID标签的射频识别（RFID）标签和装置和方法，而不比较从RFID标签发送的眨眼信号的到达时间，以便快速跟踪RFID标签的位置。 RFID标签包括被配置为生成RFID标签的标签ID的标签ID发生器，被配置为生成形成眨眼信号的多个子眨眼信号的眨眼发生器，被配置为生成眨眼的子眨眼ID生成器 生成的子眨眼信号的ID，被配置为将生成的眨眼ID插入到子眨眼信号中的子眨眼ID插入器;以及发送器，被配置为发送具有标签ID和子眨眼ID的眨眼信号 。