公开(公告)号：US08064544B2

公开(公告)日：2011-11-22

申请号：US12613610

申请日：2009-11-06

申请人： Liangchuan Li ,  Chan Zhao ,  Lun Wei

发明人： Liangchuan Li ,  Chan Zhao ,  Lun Wei

IPC分类号： H04L27/22 ,  H03D3/22

CPC分类号： H04B10/677

摘要： In the field of communication and transmission, a method and a device for receiving an OPFDM-DQPSK signal are provided. The device includes a power splitter, adapted to split the OPFDM-DQPSK signal into two beams of signals; a polarization beam splitter (PBS), adapted to splitting one of the two beams of signals into a first signal and a second signal; a demultiplexer (Demux), adapted to demultiplex the other beam of signal to obtain a third signal and a fourth signal; two delayers, adapted to delay the third signal and the fourth signal respectively; a first frequency-mixing receiving module, adapted to perform frequency-mixing receiving on the first signal and the delayed third signal; a second frequency-mixing receiving module, adapted to perform frequency-mixing receiving on the second signal and the delayed fourth signal; and a decision recovery module, adapted to recover four logical sequences by performing decision on the four electrical signals.

摘要翻译： 在通信和传输领域中，提供了一种用于接收OPFDM-DQPSK信号的方法和装置。 该装置包括功率分配器，适于将OPFDM-DQPSK信号分成两束信号; 偏振分束器（PBS），适于将两束信号中的一个分成第一信号和第二信号; 解复用器（Demux），适于解复用另一个信号束以获得第三信号和第四信号; 两个延迟器，分别适于延迟第三信号和第四信号; 第一混频接收模块，适于对所述第一信号和所延迟的第三信号执行频率混合接收; 第二混频接收模块，适于对第二信号和延迟的第四信号执行频率混合接收; 以及决定恢复模块，用于通过对四个电信号进行判定来恢复四个逻辑序列。

公开(公告)号：US20110110663A1

公开(公告)日：2011-05-12

申请号：US13006941

申请日：2011-01-14

申请人： Juhao LI ,  Linhua ZHANG ,  Dechao ZHANG ,  Fan ZHANG ,  Zhangyuan CHEN ,  Liangchuan Li

发明人： Juhao LI ,  Linhua ZHANG ,  Dechao ZHANG ,  Fan ZHANG ,  Zhangyuan CHEN ,  Liangchuan Li

IPC分类号： H04B10/02 ,  H04J14/06

CPC分类号： H04B10/2569

摘要： A method, device, system for realizing polarization mode dispersion (PMD) compensation are provided. The method for realizing PMD compensation includes: de-multiplexing a polarization-multiplexed optical signal, to obtain a first polarization light and a second polarization light; and joint-equalizing the first polarization light and the second polarization light, to obtain a first equalization signal and a second equalization signal. Since the polarization-multiplexed optical signal is de-multiplexed and then joint-equalized, not only the intra-channel symbol interference but also the inter-channel symbol interference during transmission of the polarization-multiplexed optical signal is eliminated, so as to realize the PMD compensation.

摘要翻译： 提供了一种用于实现偏振模色散（PMD）补偿的方法，装置，系统。 用于实现PMD补偿的方法包括：对偏振复用光信号进行解复用，以获得第一偏振光和第二偏振光; 并且联合均衡第一偏振光和第二偏振光，以获得第一均衡信号和第二均衡信号。 由于偏振光复用光信号被去多路复用然后联合均衡，消除了偏振复用光信号传输期间的信道内码元干扰，同时也消除了信道间码元干扰，从而实现 PMD补偿。

公开(公告)号：US20110206375A1

公开(公告)日：2011-08-25

申请号：US13091843

申请日：2011-04-21

申请人： Qianjin Xiong ,  Liangchuan Li ,  Yuanda Huang

发明人： Qianjin Xiong ,  Liangchuan Li ,  Yuanda Huang

IPC分类号： H04J14/06

CPC分类号： H04B10/671 ,  H04B10/5165 ,  H04B10/676 ,  H04B2210/003 ,  H04J14/06

摘要： The method includes: splitting an optical carrier into two or more sets of optical sub-carriers at a receiving end; respectively performing optical PDM on each set of the optical sub-carriers to obtain two sets of to-be-demodulated optical signals; and extracting a part of signals from each set of the to-be-demodulated signals to calculate features characterizing polarization states, controlling feedback signals according to the features, and correspondingly adjusting a polarization state of each set of the optical sub-carriers. With the device combining optical division into two or more sets of sub-carriers with optical PDM, an optical carrier signal can be split in an optical modulation format into four or more sets of signals for processing, and delay interference can be performed directly on an optical wave by using Differential Quadrature Phase Shifted Keying (DQPSK) demodulators to obtain by detection output signals.

摘要翻译： 该方法包括：在接收端将光载波分为两组或多组光子载波; 分别在每组光子载波上执行光PDM以获得两组要解调的光信号; 并从每组待解调信号中提取一部分信号，以计算表征极化状态的特征，根据特征控制反馈信号，并相应地调整每组光子载波的极化状态。 通过将光分组合成具有光PDM的两组或多组子载波的装置，光载波信号可以以光调制格式分成四组或更多组信号进行处理，并且延迟干扰可以直接在 通过使用差分正交相移键控（DQPSK）解调器通过检测输出信号获得光波。