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1. 发明授权

US08565620B2 Apparatus for receiving optical signal and method of controlling phase offset for differential quadrature phase shift keying 有权
标题翻译：用于接收光信号的装置和用于差分正交相移键控的相位偏移控制方法
公开(公告)号：US08565620B2
公开(公告)日：2013-10-22
申请号：US12912870
申请日：2010-10-27
申请人： Hwan-Seok Chung , Sun-Hyok Chang , Jyung-Chan Lee , Kwang-Joon Kim
发明人： Hwan-Seok Chung , Sun-Hyok Chang , Jyung-Chan Lee , Kwang-Joon Kim
IPC分类号： H04B10/06
CPC分类号： H04B10/677
摘要： An apparatus for receiving optical signals in DQPSK and method of controlling a phase offset in receiving optical signals for DQPSK is provided. An original optical signal modulated in DQPSK is received. The original optical signal is delayed by one bit to make a delay optical signal such that an interference on the original optical signal and the delay optical signal is performed. A control signal is generated by use of an interference result between the original optical signal and the delay optical signal. A phase offset for the interference between the original optical signal and the delay optical signal is controlled by use of the generated control signal. In receiving optical signals, the phase offset between the delay optical signal and the original optical signal is precisely controlled, thereby optimizing the transfer characteristics of an optical delay interferometer.
摘要翻译：提供一种用于接收DQPSK中的光信号的装置以及控制接收用于DQPSK的光信号的相位偏移的方法。接收以DQPSK调制的原始光信号。原始光信号被延迟一位以产生延迟光信号，使得对原始光信号和延迟光信号的干扰被执行。通过使用原始光信号和延迟光信号之间的干扰结果来产生控制信号。通过使用所生成的控制信号来控制原始光信号与延迟光信号之间的干扰的相位偏移。在接收光信号时，精确控制延迟光信号与原始光信号之间的相位偏移，从而优化光延迟干涉仪的传输特性。

2. 发明授权

US08532501B2 Apparatus for receiving optical signal and method of controlling phase offset for differential quadrature phase shift keying 有权
公开(公告)号：US08532501B2
公开(公告)日：2013-09-10
申请号：US12912870
申请日：2010-10-27
申请人： Hwan-Seok Chung , Sun-Hyok Chang , Jyung-Chan Lee , Kwang-Joon Kim
发明人： Hwan-Seok Chung , Sun-Hyok Chang , Jyung-Chan Lee , Kwang-Joon Kim
IPC分类号： H04B10/06
摘要： An apparatus for receiving optical signals in DQPSK and method of controlling a phase offset in receiving optical signals for DQPSK is provided. An original optical signal modulated in DQPSK is received. The original optical signal is delayed by one bit to make a delay optical signal such that an interference on the original optical signal and the delay optical signal is performed. A control signal is generated by use of an interference result between the original optical signal and the delay optical signal. A phase offset for the interference between the original optical signal and the delay optical signal is controlled by use of the generated control signal. In receiving optical signals, the phase offset between the delay optical signal and the original optical signal is precisely controlled, thereby optimizing the transfer characteristics of an optical delay interferometer.

3. 发明申请

US20120020676A1 APPARATUS FOR RECEIVING OPTICAL SIGNAL AND METHOD OF CONTROLLING PHASE OFFSET FOR DIFFERENTIAL QUADRATURE PHASE SHIFT KEYING 有权
标题翻译：用于接收光信号的装置和用于差分相位相移键控的相位偏移的方法
公开(公告)号：US20120020676A1
公开(公告)日：2012-01-26
申请号：US12912870
申请日：2010-10-27
申请人： Hwan-Seok Chung , Sun-Hyok Chang , Jyung-Chan Lee , Kwang-Joon Kim
发明人： Hwan-Seok Chung , Sun-Hyok Chang , Jyung-Chan Lee , Kwang-Joon Kim
IPC分类号： H04B10/06
CPC分类号： H04B10/677
摘要： An apparatus for receiving optical signals in DQPSK and method of controlling a phase offset in receiving optical signals for DQPSK is provided. An original optical signal modulated in DQPSK is received. The original optical signal is delayed by one bit to make a delay optical signal such that an interference on the original optical signal and the delay optical signal is performed. A control signal is generated by use of an interference result between the original optical signal and the delay optical signal. A phase offset for the interference between the original optical signal and the delay optical signal is controlled by use of the generated control signal. In receiving optical signals, the phase offset between the delay optical signal and the original optical signal is precisely controlled, thereby optimizing the transfer characteristics of an optical delay interferometer.
摘要翻译：提供一种用于接收DQPSK中的光信号的装置以及控制接收用于DQPSK的光信号的相位偏移的方法。接收以DQPSK调制的原始光信号。原始光信号被延迟一位以产生延迟光信号，使得对原始光信号和延迟光信号的干扰被执行。通过使用原始光信号和延迟光信号之间的干扰结果来产生控制信号。通过使用所生成的控制信号来控制原始光信号与延迟光信号之间的干扰的相位偏移。在接收光信号时，精确控制延迟光信号与原始光信号之间的相位偏移，从而优化光延迟干涉仪的传输特性。

4. 发明授权

US08681885B2 OFDM receiver and method for compensating for I/Q imbalance 失效
标题翻译： OFDM接收机和补偿I / Q不平衡的方法
公开(公告)号：US08681885B2
公开(公告)日：2014-03-25
申请号：US12872506
申请日：2010-08-31
申请人： Hwan-Seok Chung , Sun-Hyok Chang , Kwang-Joon Kim
发明人： Hwan-Seok Chung , Sun-Hyok Chang , Kwang-Joon Kim
IPC分类号： H04K1/10
CPC分类号： H04L27/2647 , H04L27/0014 , H04L27/2657 , H04L27/364
摘要： An OFDM receiver for compensating for I/Q imbalance is provided. The OFDM receiver includes an I/Q demodulator demodulating a received signal into a baseband in-phase (I) channel signal and a baseband quadrature (Q) channel signal, and an I/Q imbalance compensator compensating for imbalance between the I-channel signal and the Q-channel signal in a time domain. Accordingly, it is possible to solve the I/Q imbalance and suppress degradation in the performance of the OFDM communication device.
摘要翻译：提供了用于补偿I / Q不平衡的OFDM接收机。 OFDM接收机包括将接收信号解调为基带同相（I）信道信号和基带正交（Q）信道信号的I / Q解调器，以及补偿I信道信号之间的不平衡的I / Q不平衡补偿器和时域中的Q信道信号。因此，可以解决I / Q不平衡并且抑制OFDM通信设备的性能的劣化。

5. 发明授权

US08116623B2 Multi-ring network operating method and system 有权
标题翻译：多环网络运行方式和系统
公开(公告)号：US08116623B2
公开(公告)日：2012-02-14
申请号：US12127493
申请日：2008-05-27
申请人： Hwan-Seok Chung , Sun-Hyok Chang , Sang-Soo Lee , Kwang-Joon Kim
发明人： Hwan-Seok Chung , Sun-Hyok Chang , Sang-Soo Lee , Kwang-Joon Kim
IPC分类号： H04B10/00
CPC分类号： H04J14/0283 , H04J14/0204 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04J14/0286 , H04J14/0294 , H04J14/0295 , H04Q2011/0081 , H04Q2011/0092
摘要： Provided is a multi-ring network operating method of cross-connecting at least two ring networks, the method including connecting an input working ring and an input protection ring of a ring network to an output working ring and an output protection ring of another ring network and then performing cross-connection between the same or different ring networks by using a multi-dimensional cross-connect apparatus. In the multi-ring operating method, a plurality of ring networks can be connected regardless of the protection method used by the ring networks, and the original protection method of each ring network can remain after they are connected.
摘要翻译：提供一种交换连接至少两个环网的多环网操作方法，该方法包括将环网的输入工作环和输入保护环连接到另一环网的输出工作环和输出保护环然后通过使用多维交叉连接装置在相同或不同的环形网络之间执行交叉连接。在多环操作方法中，无论环网使用的保护方式如何，都可以连接多个环网，每个环网的原始保护方法可以在连接后保留。

6. 发明申请

US20110026924A1 OFDM OPTICAL TRANSMITTER AND OPTICAL TRANSMISSION METHOD 审中-公开
标题翻译： OFDM光学发射机和光传输方法
公开(公告)号：US20110026924A1
公开(公告)日：2011-02-03
申请号：US12821465
申请日：2010-06-23
申请人： Hwan-Seok Chung , Sun-Hyok Chang , Kwang-Joon Kim
发明人： Hwan-Seok Chung , Sun-Hyok Chang , Kwang-Joon Kim
IPC分类号： H04J14/02 , H04B10/04
CPC分类号： H04B10/5055 , H04B10/548 , H04L27/2626 , H04L27/2697
摘要： An OFDM optical transmitter and optical transmission method is provided. The OFDM optical transmitter includes a signal converter controlling amplitude of each of data signals according to a position of each of the data signals and converting the controlled data signal into a time-domain signal. Accordingly, it is possible to generate optical OFDM carriers which are uniform in size.
摘要翻译：提供了一种OFDM光发射机和光传输方法。 OFDM光发射机包括信号转换器，其根据每个数据信号的位置控制每个数据信号的幅度，并将受控数据信号转换成时域信号。因此，可以生成尺寸一致的光OFDM载波。

7. 发明申请

US20080317466A1 MULTI-RING NETWORK OPERATING METHOD AND SYSTEM 有权
标题翻译：多环网操作方法与系统
公开(公告)号：US20080317466A1
公开(公告)日：2008-12-25
申请号：US12127493
申请日：2008-05-27
申请人： Hwan-Seok Chung , Sun-Hyok Chang , Sang-Soo Lee , Kwang-Joon Kim
发明人： Hwan-Seok Chung , Sun-Hyok Chang , Sang-Soo Lee , Kwang-Joon Kim
IPC分类号： H04J14/00
CPC分类号： H04J14/0283 , H04J14/0204 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04J14/0286 , H04J14/0294 , H04J14/0295 , H04Q2011/0081 , H04Q2011/0092
摘要： Provided is a multi-ring network operating method of cross-connecting at least two ring networks, the method including connecting an input working ring and an input protection ring of a ring network to an output working ring and an output protection ring of another ring network and then performing cross-connection between the same or different ring networks by using a multi-dimensional cross-connect apparatus. In the multi-ring operating method, a plurality of ring networks can be connected regardless of the protection method used by the ring networks, and the original protection method of each ring network can remain after they are connected.
摘要翻译：提供一种交换连接至少两个环网的多环网操作方法，该方法包括将环网的输入工作环和输入保护环连接到另一环网的输出工作环和输出保护环然后通过使用多维交叉连接装置在相同或不同的环形网络之间执行交叉连接。在多环操作方法中，无论环网使用的保护方式如何，都可以连接多个环网，每个环网的原始保护方法可以在连接后保留。

8. 发明申请

US20120148265A1 COHERENT OPTICAL RECEIVING DEVICE CAPABLE OF DIGITAL EQUALIZATION OF OPTICAL INPUT, DIGITAL EQUALIZATION METHOD FOR OPTICAL INPUT AND COHERENT OPTICAL TRANSMITTING/RECEIVING DEVICE 审中-公开
标题翻译：光学输入数字均衡的光学接收装置，用于光输入和相干光传输/接收装置的数字均衡方法的相关光接收装置
公开(公告)号：US20120148265A1
公开(公告)日：2012-06-14
申请号：US13323791
申请日：2011-12-12
申请人： Sun-Hyok CHANG , Hwan-Seok Chung
发明人： Sun-Hyok CHANG , Hwan-Seok Chung
IPC分类号： H04B10/06
CPC分类号： H04B10/6161
摘要： A coherent optical receiving device capable of digital equalization of an optical input, and a method thereof. The coherent optical receiving device includes a chromatic dispersion compensating unit configured to comprise a filter for chromatic dispersion compensation and compensate for chromatic dispersion with respect to a digital signal that corresponds to an optical input using the filter; a decoder configured to generate a bit sequence of the signal which has been compensated for chromatic dispersion; a bit error calculating unit configured to calculate a bit error amount in the bit sequence; and a controller configured to monitor the bit error amount, determine a filter coefficient that makes the bit error amount a minimum, and set the determined filter coefficient in the chromatic dispersion compensating unit.
摘要翻译：能够进行光输入的数字均衡的相干光接收装置及其方法。相干光接收装置包括色散补偿单元，其被配置为包括用于色散补偿的滤波器，并且相对于使用滤波器的光输入对应于数字信号来补偿色散; 解码器，被配置为生成已被补偿色散的信号的比特序列; 位误差计算单元，被配置为计算比特序列中的比特误差量; 以及控制器，被配置为监视所述误码量，确定使所述误码量最小的滤波器系数，并将所确定的滤波器系数设置在所述色散补偿单元中。

9. 发明授权

US08155521B2 Multi-degree cross-connector system, operating method and optical communication network using the same 有权
标题翻译：多度交叉连接器系统，操作方法和光通信网使用相同
公开(公告)号：US08155521B2
公开(公告)日：2012-04-10
申请号：US12514977
申请日：2006-12-06
申请人： Hwan-Seok Chung , Kwangloon Kim , Sang-Soo Lee , Sun-Hyok Chang
发明人： Hwan-Seok Chung , Kwangloon Kim , Sang-Soo Lee , Sun-Hyok Chang
IPC分类号： H04J14/00
CPC分类号： H04Q11/0005 , H04J14/0204 , H04J14/0212 , H04J14/0213 , H04J14/0217 , H04J14/0219 , H04Q2011/0015 , H04Q2011/0016 , H04Q2011/0039 , H04Q2011/0052
摘要： Provided are a network node which has a wavelength switching cross-connection function and can thus interconnect paths of a wavelength-division-multiplexed optical signal and convert wavelengths, and an operating method of the network node. Accordingly, it is possible to provide a multi-degree cross-connection system having a simple structure at lower cost by allowing transmission of optical signals supposed not to be added/dropped at a network node without converting them into electrical signals and performing O/E conversion or E/O conversion only on optical signals supposed to be added/dropped at a network node. In addition, it is possible to increase the expandability of networks by regenerating degraded signals and which can effectively utilize bandwidths by grooming low-speed electrical digital hierarchy signals and transmitting them as high-speed optical signals. Moreover, it is possible to increase the availability of network resources by performing wavelength conversion without the need of additional wavelength converters. Furthermore, it is possible to prevent multiplexed optical signals from being degraded by filtering even when the multiplexed optical signals are not demultiplexed into wavelengths. Still furthermore, it is possible to perform a multicast operation on input wavelengths.
摘要翻译：提供了具有波长切换交叉连接功能并且因此可以互连波分复用光信号的路径并转换波长的网络节点以及网络节点的操作方法。因此，可以通过允许在网络节点处不被添加/丢弃的光信号的传输而不将它们转换成电信号并执行O / E来提供具有简单结构的多级交叉连接系统，其具有较低的成本转换或E / O转换仅在光网络节点上被添加/删除的信号上。此外，可以通过再生劣化信号来增加网络的可扩展性，并且可以通过梳理低速电子数字分层信号并将其作为高速光信号传输来有效地利用带宽。此外，可以通过执行波长转换来增加网络资源的可用性，而不需要额外的波长转换器。此外，即使当复用的光信号未被解复用为波长时，也可以防止多路复用的光信号被滤波劣化。此外，可以对输入波长执行多播操作。

10. 发明申请

US20100027996A1 MULTI-DEGREE CROSS-CONNECTOR SYSTEM, OPERATING METHOD AND OPTICAL COMMUNICATION NETWORK USING THE SAME 有权
标题翻译：多级交叉连接器系统，使用该方法的操作方法和光通信网络
公开(公告)号：US20100027996A1
公开(公告)日：2010-02-04
申请号：US12514977
申请日：2006-12-06
申请人： Hwan-Seok Chung , Kwangloon Kim , Sang-Soo Lee , Sun-Hyok Chang
发明人： Hwan-Seok Chung , Kwangloon Kim , Sang-Soo Lee , Sun-Hyok Chang
IPC分类号： H04J14/00
CPC分类号： H04Q11/0005 , H04J14/0204 , H04J14/0212 , H04J14/0213 , H04J14/0217 , H04J14/0219 , H04Q2011/0015 , H04Q2011/0016 , H04Q2011/0039 , H04Q2011/0052
摘要： Provided are a network node which has a wavelength switching cross-connection function and can thus interconnect paths of a wavelength-division-multiplexed optical signal and convert wavelengths, and an operating method of the network node. Accordingly, it is possible to provide a multi-degree cross-connection system having a simple structure at lower cost by allowing transmission of optical signals supposed not to be added/dropped at a network node without converting them into electrical signals and performing O/E conversion or E/O conversion only on optical signals supposed to be added/dropped at a network node. In addition, it is possible to increase the expandability of networks by regenerating degraded signals and which can effectively utilize bandwidths by grooming low-speed electrical digital hierarchy signals and transmitting them as high-speed optical signals. Moreover, it is possible to increase the availability of network resources by performing wavelength conversion without the need of additional wavelength converters. Furthermore, it is possible to prevent multiplexed optical signals from being degraded by filtering even when the multiplexed optical signals are not demultiplexed into wavelengths. Still furthermore, it is possible to perform a multicast operation on input wavelengths.
摘要翻译：提供了具有波长切换交叉连接功能并且因此可以互连波分复用光信号的路径并转换波长的网络节点以及网络节点的操作方法。因此，可以通过允许在网络节点处不被添加/丢弃的光信号的传输而不将它们转换成电信号并执行O / E来提供具有简单结构的多级交叉连接系统，其具有较低的成本转换或E / O转换仅在光网络节点上被添加/删除的信号上。此外，可以通过再生劣化信号来增加网络的可扩展性，并且可以通过梳理低速电子数字分层信号并将其作为高速光信号传输来有效地利用带宽。此外，可以通过执行波长转换来增加网络资源的可用性，而不需要额外的波长转换器。此外，即使当复用的光信号未被解复用为波长时，也可以防止多路复用的光信号被滤波劣化。此外，可以对输入波长执行多播操作。

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