公开(公告)号：US20150358078A1

公开(公告)日：2015-12-10

申请号：US14761371

申请日：2014-01-17

申请人： NEC CORPORATION

发明人： DAISAKU OGASAHARA

IPC分类号： H04B10/079 ,  H04B10/60 ,  H04J14/06

CPC分类号： H04B10/07953 ,  H04B10/60 ,  H04B10/614 ,  H04B10/6166 ,  H04J14/06

摘要： A polarization demultiplexing optical communication receiver is provided with a signal quality change imparting means which imparts a signal quality change to multiplexed two optical signals; and a signal quality monitoring means which compares signal qualities of the two optical signals with each other after the multiplexed two optical signals imparted with the signal quality change are subjected to polarization separation so as to specify the two optical signals based on a result of the comparison. This makes it possible to reduce transmission characteristics degradation of a polarization-multiplexed optical signal, and to implement transmission having high reliability.

摘要翻译： 偏振解复用光通信接收机设置有信号质量改变赋予装置，其对多路复用的两个光信号赋予信号质量改变; 以及信号质量监视装置，其在赋予信号质量变化的多路复用的两个光信号经过偏振分离之后对两个光信号的信号质量进行比较，以便基于比较结果来指定两个光信号 。 这使得可以降低偏振复用光信号的传输特性劣化，并实现高可靠性的传输。

公开(公告)号：US09100125B2

公开(公告)日：2015-08-04

申请号：US14028157

申请日：2013-09-16

申请人： ViaSat, Inc.

发明人： Fan Mo ,  Sameep Dave

IPC分类号： H04B10/00 ,  H04B10/06 ,  H04B10/50 ,  H04B10/516 ,  H04B10/077 ,  H04B10/61 ,  H04B10/69 ,  H04L27/20 ,  H04L27/22

CPC分类号： H04B10/505 ,  H04B10/077 ,  H04B10/516 ,  H04B10/6166 ,  H04B10/6971 ,  H04L27/2096 ,  H04L27/22

摘要： Methods, systems, and devices are described for formatting of data streams to be transmitted over fiber optic channels, and for processing received optical signals. A data transmission device may include a digital coding and modulation module that encodes a digital data stream, inserts unique words into the digital data stream, and modulates the encoded data stream and unique words onto optical channels for transmission over an optical fiber. A demodulation and decoding device may include a unique word identification module that identifies the unique words inserted in each optical channel stream, determines one or more characteristics of the plurality of optical channels based on the unique words, and provides the one or more characteristics to one or more other modules in the demodulator and decoding device.

摘要翻译： 描述了通过光纤通道传输的数据流的格式化以及处理所接收的光信号的方法，系统和设备。 数据传输设备可以包括对数字数据流进行编码的数字编码和调制模块，将唯一字插入到数字数据流中，并且将经编码的数据流和唯一字调制到光信道上以在光纤上传输。 解调和解码设备可以包括识别在每个光信道流中插入的唯一字的唯一字识别模块，基于唯一字确定多个光信道的一个或多个特性，并将一个或多个特性提供给一个 或更多其他模块在解调器和解码设备。

公开(公告)号：US09025963B2

公开(公告)日：2015-05-05

申请号：US13434213

申请日：2012-03-29

申请人： Christian Malouin ,  Theodore John Schmidt ,  Bo Zhang ,  Elias Simpson ,  Roberto Marcoccia

发明人： Christian Malouin ,  Theodore John Schmidt ,  Bo Zhang ,  Elias Simpson ,  Roberto Marcoccia

IPC分类号： H04B10/61

CPC分类号： H04B10/6161 ,  H04B10/40 ,  H04B10/616 ,  H04B10/6166 ,  H04J14/06 ,  H04L7/0075 ,  H04L27/2273

摘要： This disclosure describes techniques to sample electrical data streams in coherent receivers. For instance, an analog-to-digital converter (ADC) samples the received electrical data stream at a sampling rate that is nominally twice or greater than twice the symbol rate of the electrical data stream that the ADC receives. A digital filter receives the digital data stream from the ADC, and digitally filters the digital data streams to output a filtered digital electrical data stream at an effective sampling rate that is less than the sampling rate and less than twice the symbol rate, and greater than or equal to the symbol rate.

摘要翻译： 本公开描述了在相干接收机中采样电数据流的技术。 例如，模数转换器（ADC）以标称值为ADC接收的电数据流的符号速率的两倍或更大的采样速率对接收的电数据流进行采样。 数字滤波器从ADC接收数字数据流，并对数字数据流进行数字滤波，以低于采样速率且小于符号速率的两倍的有效采样速率输出滤波后的数字电子数据流，并且大于 或等于符号率。

公开(公告)号：US20150110490A1

公开(公告)日：2015-04-23

申请号：US14382494

申请日：2013-03-01

申请人： NEC Corporation

发明人： Kouichi Suzuki

IPC分类号： H04B10/61 ,  H04J14/06

CPC分类号： H04B10/614 ,  H04B10/611 ,  H04B10/6166 ,  H04J14/06 ,  H04L27/22

摘要： In a receiver, a reception front end receives a polarization-scrambled polarization multiplexed optical signal, polarization-separates the received polarization multiplexed optical signal, and converts each signal into quantized signals. A digital signal processor samples the quantized signals, demodulates the signals by using a polarization separation digital signal processing algorithm, and outputs demodulated signals. When phase and amplitude variations of the demodulated signals are greater than a predetermined value, a control circuit causes the digital signal processor to interrupt processing using the polarization separation digital signal processing algorithm, changes an initial value of a filter coefficient, and then causes the digital signal processor to start the processing using the polarization separation digital signal processing algorithm.

摘要翻译： 在接收机中，接收前端接收偏振加扰的偏振复用光信号，对接收到的偏振复用光信号进行极化分离，并将每个信号转换为量化信号。 数字信号处理器对量化的信号进行采样，通过使用偏振分离数字信号处理算法解调信号，并输出解调信号。 当解调信号的相位和幅度变化大于预定值时，控制电路使数字信号处理器使用偏振分离数字信号处理算法中断处理，改变滤波器系数的初始值，然后使数字信号处理器 信号处理器开始使用偏振分离数字信号处理算法进行处理。

公开(公告)号：US08989602B2

公开(公告)日：2015-03-24

申请号：US13283214

申请日：2011-10-27

申请人： Kosuke Komaki ,  Osamu Takeuchi

发明人： Kosuke Komaki ,  Osamu Takeuchi

IPC分类号： H04B10/06 ,  H04L25/03 ,  H04B10/61

CPC分类号： H04L25/03019 ,  H04B10/611 ,  H04B10/6166 ,  H04L2025/0363

摘要： A digital coherent optical receiver includes a processor that is operative to separate electric signals obtained by converting an optical signal into a horizontal signal component and a vertical signal component; to generate a histogram of the horizontal signal component and the vertical signal component as outputs of the equalizing filter; and to determine a presence/absence of local convergence based on distribution of the histogram of the horizontal signal component and the histogram of the vertical signal component.

摘要翻译： 一种数字相干光接收机包括：处理器，用于将通过将光信号转换成水平信号分量和垂直信号分量获得的电信号分离; 以产生水平信号分量和垂直信号分量的直方图作为均衡滤波器的输出; 并且基于水平信号分量的直方图和垂直信号分量的直方图的分布来确定局部收敛的存在/不存在。

公开(公告)号：US08886051B2

公开(公告)日：2014-11-11

申请号：US14178986

申请日：2014-02-12

申请人： ViaSat, Inc.

发明人： Yuri Zelensky ,  Fan Mo

IPC分类号： H04B10/00 ,  H04B10/61 ,  H04B10/2569 ,  H04B10/69 ,  H04L25/03

CPC分类号： H04B10/6165 ,  H04B10/2569 ,  H04B10/613 ,  H04B10/6166 ,  H04B10/6971 ,  H04L25/03057

摘要： Compensation for in-phase (I) and quadrature (Q) timing skew and offset in an optical signal may be achieved based on the correlation between derivatives of I and Q samples in the optical signal. The magnitude of the correlation between derivatives is measured to determine the presence of skew. Correlation between derivatives may be coupled with frequency offset information and/or with trials having additional positive and negative skew to determine presence of skew. Correlations are determined according to pre-defined time periods to provide for continued tracking and compensation for timing skew that may result from, for example, thermal drift.

公开(公告)号：US20140161470A1

公开(公告)日：2014-06-12

申请号：US14178986

申请日：2014-02-12

申请人： ViaSat, Inc.

发明人： Yuri Zelensky ,  Fan Mo

IPC分类号： H04B10/61

CPC分类号： H04B10/6165 ,  H04B10/2569 ,  H04B10/613 ,  H04B10/6166 ,  H04B10/6971 ,  H04L25/03057

摘要： Compensation for in-phase (I) and quadrature (Q) timing skew and offset in an optical signal may be achieved based on the correlation between derivatives of I and Q samples in the optical signal. The magnitude of the correlation between derivatives is measured to determine the presence of skew. Correlation between derivatives may be coupled with frequency offset information and/or with trials having additional positive and negative skew to determine presence of skew. Correlations are determined according to pre-defined time periods to provide for continued tracking and compensation for timing skew that may result from, for example, thermal drift.

摘要翻译： 可以基于光信号中的I和Q样本的导数之间的相关性来实现光信号中的同相（I）和正交（Q）定时偏移和偏移的补偿。 测量导数之间的相关性的大小以确定倾斜的存在。 导数之间的相关性可以与频率偏移信息和/或具有额外的正和负偏移的试验相结合以确定倾斜的存在。 相关性根据预定义的时间周期来确定，以提供可能由例如热漂移引起的定时偏移的持续跟踪和补偿。

公开(公告)号：US20130259490A1

公开(公告)日：2013-10-03

申请号：US13434213

申请日：2012-03-29

申请人： Christian Malouin ,  Theodore John Schmidt ,  Bo Zhang ,  Elias Simpson ,  Roberto Marcoccia

发明人： Christian Malouin ,  Theodore John Schmidt ,  Bo Zhang ,  Elias Simpson ,  Roberto Marcoccia

IPC分类号： H04B10/02

CPC分类号： H04B10/6161 ,  H04B10/40 ,  H04B10/616 ,  H04B10/6166 ,  H04J14/06 ,  H04L7/0075 ,  H04L27/2273

摘要： This disclosure describes techniques to sample electrical data streams in coherent receivers. For instance, an analog-to-digital converter (ADC) samples the received electrical data stream at a sampling rate that is nominally twice or greater than twice the symbol rate of the electrical data stream that the ADC receives. A digital filter receives the digital data stream from the ADC, and digitally filters the digital data streams to output a filtered digital electrical data stream at an effective sampling rate that is less than the sampling rate and less than twice the symbol rate, and greater than or equal to the symbol rate.

公开(公告)号：US08515293B2

公开(公告)日：2013-08-20

申请号：US13138958

申请日：2010-04-21

申请人： Wakako Yasuda ,  Daisaku Ogasahara ,  Kiyoshi Fukuchi

发明人： Wakako Yasuda ,  Daisaku Ogasahara ,  Kiyoshi Fukuchi

IPC分类号： H04B10/06

CPC分类号： H04B10/611 ,  H04B10/60 ,  H04B10/6166 ,  H04L27/223

摘要： A coherent receiver 1 assigns a first transmission signal to first transmission polarization, assigns a second transmission signal to second transmission polarization, and receives a quadrature multiplexed signal formed by applying quadrature multiplexing to the first transmission polarization and the second transmission polarization. The coherent receiver includes a detection means 10 for detecting the first transmission polarization and the second transmission polarization according to prescribed first reception polarization and second reception polarization and obtaining a first detected signal and a second detected signal; a quantization means 20 for quantizing the first detected signal and the second detected signal and obtaining a first quantized signal and a second quantized signal; and a signal processing means 30 for, when filtering the first quantized signal and the second quantized signal using a prescribed filtering control algorithm to form a first demodulated signal and a second demodulated signal respectively, adjusting filter coefficients of the filtering control algorithm according to the first quantized signal and the second quantized signal and the first demodulated signal and the second demodulated signal, and outputting the first demodulated signal and the second demodulated signal to a first output terminal and a second output terminal, respectively.

摘要翻译： 相干接收机1将第一传输信号分配给第一传输极化，将第二传输信号分配给第二传输极化，并且接收通过对第一透射偏振和第二透射偏振应用正交多路复用形成的正交多路复用信号。 相干接收机包括检测装置10，用于根据规定的第一接收极化和第二接收极化检测第一透射偏振和第二透射偏振，并获得第一检测信号和第二检测信号; 量化装置20，用于量化第一检测信号和第二检测信号，并获得第一量化信号和第二量化信号; 以及信号处理装置30，用于当使用规定的滤波控制算法对第一量化信号和第二量化信号进行滤波以分别形成第一解调信号和第二解调信号时，根据第一信号调整滤波器控制算法的滤波器系数 量化信号和第二量化信号以及第一解调信号和第二解调信号，并将第一解调信号和第二解调信号分别输出到第一输出端和第二输出端。

公开(公告)号：US08320764B2

公开(公告)日：2012-11-27

申请号：US12321081

申请日：2009-01-14

申请人： Gabriel Charlet ,  Jeremie Renaudier

发明人： Gabriel Charlet ,  Jeremie Renaudier

IPC分类号： H04B13/02

CPC分类号： H04B10/61 ,  H04B10/532 ,  H04B10/5561 ,  H04B10/611 ,  H04B10/6163 ,  H04B10/6165 ,  H04B10/6166

摘要： The invention relates to a modulation scheme for optical communication, in particular for fiber optics communication. According to invention, an optical signal is generated, both phase and polarization of which modulated in dependency of the data to be transmitted. Preferably, the generated optical signal comprises a sequence of symbols (22a-22k) and each symbol (22a-22k) has one of two different phase states and one of two different orthogonal polarization states. Bits of the data stream to be transmitted are encoded both in the phase state of a symbol (or in the phase state difference between subsequent symbols) and in the polarization state of the symbol (or in the polarization state difference between the subsequent symbols).

摘要翻译： 本发明涉及用于光通信的调制方案，特别是用于光纤通信。 根据本发明，产生光信号，其相位和极化根据要发送的数据进行调制。 优选地，所生成的光信号包括符号序列（22a-22k），并且每个符号（22a-22k）具有两个不同相位状态之一和两个不同正交极化状态中的一个。 要发送的数据流的比特以符号的相位状态（或者在后续符号之间的相位状态差）和符号的偏振状态（或者在后续符号之间的偏振状态差）中被编码。