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    Efficient data transmission and training of data processing functions
    23.
    发明申请
    Efficient data transmission and training of data processing functions 失效
    高效的数据传输和数据处理功能的培训

    公开(公告)号：US20070092260A1

    公开(公告)日：2007-04-26

    申请号：US11328199

    申请日：2006-01-10

    申请人： Chandra Bontu ,  Kuang Wu ,  John McNicol ,  Kim Roberts ,  Han Sun

    发明人： Chandra Bontu ,  Kuang Wu ,  John McNicol ,  Kim Roberts ,  Han Sun

    IPC分类号： H04B10/00

    CPC分类号： H04J3/0608 ,  H04J14/06 ,  H04L7/027 ,  H04L7/0278 ,  H04L7/048

    摘要： A method of a conveying data through an optical communications system. An optical signal is received through the optical communication system, the optical signal comprising data symbols and SYNC bursts, each SYNC burst having a predetermined symbol sequence. The received optical signal is oversampled to generate a multi-bit sample stream. The sample stream is partitioned into blocks of contiguous samples, wherein each block of samples partially overlaps at least one other block of samples and encompasses at least one SYNC burst and a plurality of data symbols. Each block of samples is independently processed to detect a value of each data symbol.

    摘要翻译： 一种通过光通信系统传送数据的方法。 通过光通信系统接收光信号，光信号包括数据符号和SYNC脉冲串，每个SYNC脉冲串具有预定的符号序列。 所接收的光信号被过采样以产生多比特采样流。 样本流被划分为连续样本块，其中每个样本块与至少一个其他样本块部分重叠，并且包含至少一个SYNC突发和多个数据符号。 每个样本块被独立地处理以检测每个数据符号的值。

    Signal equalizer in a coherent receiver
    24.
    发明授权
    Signal equalizer in a coherent receiver 有权
    相干接收机中的信号均衡器

    公开(公告)号：US08385747B2

    公开(公告)日：2013-02-26

    申请号：US13160579

    申请日：2011-06-15

    申请人： Kim B. Roberts ,  Han Sun

    发明人： Kim B. Roberts ,  Han Sun

    IPC分类号： H04B10/00

    CPC分类号： H04B10/6971 ,  H04B10/2569 ,  H04B10/2572 ,  H04B10/532 ,  H04B10/677

    摘要： A signal equalizer for compensating impairments of an optical signal received through a link of a high speed optical communications network. At least one set of compensation vectors are computed for compensating at least two distinct types of impairments. A frequency domain processor is coupled to receive respective raw multi-bit in-phase (I) and quadrature (Q) sample streams of each received polarization of the optical signal. The frequency domain processor operates to digitally process the multi-bit sample streams, using the compensation vectors, to generate multi-bit estimates of symbols modulated onto each transmitted polarization of the optical signal. The frequency domain processor exhibits respective different responses to each one of the at least two distinct types of impairments.

    摘要翻译： 一种信号均衡器，用于补偿通过高速光通信网络的链路接收的光信号的损伤。 计算至少一组补偿向量以补偿至少两种不同类型的损伤。 频域处理器被耦合以接收光信号的每个接收极化的相应的原始多位同相（I）和正交（Q）采样流。 频域处理器操作以使用补偿矢量对多位采样流进行数字处理，以产生调制到光信号的每个透射偏振上的符号的多位估计。 所述频域处理器对所述至少两种不同类型的损伤中的每一种表现出相应的不同响应。

    Cycle slip location and correction
    25.
    发明授权
    Cycle slip location and correction 有权
    循环滑移位置和校正

    公开(公告)号：US08166365B2

    公开(公告)日：2012-04-24

    申请号：US12326933

    申请日：2008-12-03

    申请人： James Harley ,  Kim B. Roberts ,  Han Sun

    发明人： James Harley ,  Kim B. Roberts ,  Han Sun

    IPC分类号： H03M13/11

    CPC分类号： H03M13/336 ,  H03M13/333 ,  H04B10/611 ,  H04B10/6164

    摘要： Methods and techniques are disclosed for correcting the effect of cycle slips in a coherent communications system. A signal comprising SYNC bursts having a predetermined periodicity and a plurality of known symbols at predetermined locations between successive SYNC bursts is received. The received signal is partitioned into data blocks. Each data block encompasses at least data symbols and a set of check symbols corresponding to the plurality of known symbols at predetermined locations between a respective pair of successive SYNC bursts in the signal. Each data block is processed to detect a cycle slip. When a cycle slip is detected, the set of check symbols of the data block are examined to identify a first slipped check symbol, and a phase correction applied to data symbols of the data block lying between the first slipped check symbol and an end of the data block.

    摘要翻译： 公开了用于校正相干通信系统中循环滑移的影响的方法和技术。 接收包括具有预定周期的SYNC脉冲串和在连续SYNC脉冲串之间的预定位置处的多个已知符号的信号。 接收的信号被分割成数据块。 每个数据块在该信号中的相应的一对连续SYNC突发之间的预定位置处至少包含与多个已知符号对应的数据符号和一组校验符号。 处理每个数据块以检测周期滑移。 当检测到周期滑移时，检查数据块的校验符号集合以识别第一滑动校验符号，并且应用于位于第一滑动校验符号和第一滑动校验符号的结尾之间的数据块的数据符号的相位校正 数据块。

    Signal equalizer in a coherent optical receiver
    26.
    发明授权
    Signal equalizer in a coherent optical receiver 有权
    相干光接收机中的信号均衡器

    公开(公告)号：US09094122B2

    公开(公告)日：2015-07-28

    申请号：US13747704

    申请日：2013-01-23

    申请人： Kim B. Roberts ,  Han Sun

    发明人： Kim B. Roberts ,  Han Sun

    IPC分类号： H04B10/00 ,  H04B10/2507 ,  H04B10/67 ,  H04B10/69

    CPC分类号： H04B10/6971 ,  H04B10/2569 ,  H04B10/2572 ,  H04B10/532 ,  H04B10/677

    摘要： A signal equalizer for compensating impairments of an optical signal received through a link of a high speed optical communications network. At least one set of compensation vectors are computed for compensating at least two distinct types of impairments. A frequency domain processor is coupled to receive respective raw multi-bit in-phase (I) and quadrature (Q) sample streams of each received polarization of the optical signal. The frequency domain processor operates to digitally process the multi-bit sample streams, using the compensation vectors, to generate multi-bit estimates of symbols modulated onto each transmitted polarization of the optical signal. The frequency domain processor exhibits respective different responses to each one of the at least two distinct types of impairments.

    摘要翻译： 一种信号均衡器，用于补偿通过高速光通信网络的链路接收的光信号的损伤。 计算至少一组补偿向量以补偿至少两种不同类型的损伤。 频域处理器被耦合以接收光信号的每个接收极化的相应的原始多位同相（I）和正交（Q）采样流。 频域处理器操作以使用补偿矢量对多位采样流进行数字处理，以产生调制到光信号的每个透射偏振上的符号的多位估计。 所述频域处理器对所述至少两种不同类型的损伤中的每一种表现出相应的不同响应。

    Soft decoding of data in a coherent optical receiver
    27.
    发明授权
    Soft decoding of data in a coherent optical receiver 有权
    在相干光接收机中对数据进行软解码

    公开(公告)号：US08718491B2

    公开(公告)日：2014-05-06

    申请号：US12608022

    申请日：2009-10-29

    申请人： Amir Keyvan Khandani ,  Han Sun ,  Kim B. Roberts

    发明人： Amir Keyvan Khandani ,  Han Sun ,  Kim B. Roberts

    IPC分类号： H04J14/06 ,  H04B10/06

    CPC分类号： H04B10/2572 ,  H04B10/60 ,  H04B10/611 ,  H04B10/613 ,  H04B10/6161 ,  H04B10/6162 ,  H04L25/067 ,  H04L2025/03617

    摘要： In a coherent optical receiver receiving a polarization multiplexed optical signal through an optical communications network, a method of compensating noise due to polarization dependent loss (PDL). A Least Mean Squares (LMS) compensation block processes sample streams of the received optical signal to generate symbol estimates of symbols modulated onto each transmitted polarization of the optical signal. A decorrelation block de-correlates noise in the respective symbol estimates of each transmitted polarization and generating a set of decorrelated coordinate signals. A maximum likelihood estimator soft decodes the de-correlated coordinate signals generated by the decorrelation block.

    摘要翻译： 在通过光通信网络接收偏振复用光信号的相干光接收机中，由偏振相关损耗（PDL）补偿噪声的方法。 最小均方（LMS）补偿块处理所接收的光信号的采样流，以生成调制到光信号的每个透射偏振上的符号的码元估计。 解相关块将各个发射的偏振的相应符号估计中的噪声去相关，并产生一组去相关的坐标信号。 最大似然估计器对解相关块产生的去相关坐标信号进行软解码。

    Carrier lock detector
    28.
    发明申请
    Carrier lock detector 有权
    载体锁定检测器

    公开(公告)号：US20050201492A1

    公开(公告)日：2005-09-15

    申请号：US10796152

    申请日：2004-03-10

    申请人： Kuang Wu ,  Han Sun ,  John McNicol

    发明人： Kuang Wu ,  Han Sun ,  John McNicol

    IPC分类号： H04L27/22

    CPC分类号： H04L27/3827 ,  H04L27/0014

    摘要： A carrier lock detector for a QPSK or 4-QAM system implements, a lock detection algorithm that maps detected signals onto one of first and second areas associated with nominal states defined by (I2⊕I3)·(Q2⊕Q3) and {overscore (Q1⊕Q2)}·(I1{overscore (I2I3)}+{overscore (I1)}I2I3)+({overscore (I1⊕I2)})·(Q1{overscore (Q2Q3)}+{overscore (Q1)}Q2Q3), or alternatively, by ({overscore (I1⊕I2)}·{overscore (Q2⊕Q3)})+({overscore (Q1⊕Q2)}·{overscore (I2⊕I3)}), respectively. When detected signals map onto one of the first areas, a first signal is generated. When detected signals map onto one of the second areas, a second signal is generated. When a difference between the first and second signals exceeds a threshold, a carrier lock detection signal is generated to enable a decoder. The carrier lock detector is able to detect carrier lock at a raw BER of 1e-2 or greater at a very low signal-to-noise ratio.

    摘要翻译： 用于QPSK或4-QAM系统的载波锁定检测器实现了一种锁定检测算法，该检测算法将检测到的信号映射到与由（I 2 / （Q 2）⊕Q3 3）和（超core SUB SUB SUB SUB⊕SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB >）}。（I 1 {overscore（I 2 3 }} ）}（{overscore（I＆lt; 1＆lt; 1＆lt; 2＆gt; 2＆gt;}}）（ Q （过大的（Q 2）3 Q 3）} + {overscore（Q 1> 1 ）} Q “1”>“3”）}）。 当检测到的信号映射到第一区域之一时，产生第一信号。 当检测到的信号映射到第二区域之一时，产生第二信号。 当第一和第二信号之间的差异超过阈值时，产生载波锁定检测信号以使能解码器。 载波锁定检测器能够以非常低的信噪比以1e-2或更大的原始BER检测载波锁定。

    Signal equalizer in a coherent optical receiver
    29.
    发明授权
    Signal equalizer in a coherent optical receiver 有权
    相干光接收机中的信号均衡器

    公开(公告)号：US08005368B2

    公开(公告)日：2011-08-23

    申请号：US11950585

    申请日：2007-12-05

    申请人： Kim Roberts ,  Han Sun

    发明人： Kim Roberts ,  Han Sun

    IPC分类号： H04B10/00

    CPC分类号： H04B10/6971 ,  H04B10/2569 ,  H04B10/2572 ,  H04B10/532 ,  H04B10/677

    摘要： A signal equalizer for compensating impairments of an optical signal received through a link of a high speed optical communications network. At least one set of compensation vectors are computed for compensating at least two distinct types of impairments. A frequency domain processor is coupled to receive respective raw multi-bit in-phase (I) and quadrature (Q) sample streams of each received polarization of the optical signal. The frequency domain processor operates to digitally process the multi-bit sample streams, using the compensation vectors, to generate multi-bit estimates of symbols modulated onto each transmitted polarization of the optical signal. The frequency domain processor exhibits respective different responses to each one of the at least two distinct types of impairments.

    摘要翻译： 一种信号均衡器，用于补偿通过高速光通信网络的链路接收的光信号的损伤。 计算至少一组补偿向量以补偿至少两种不同类型的损伤。 频域处理器被耦合以接收光信号的每个接收极化的相应的原始多位同相（I）和正交（Q）采样流。 频域处理器操作以使用补偿矢量对多位采样流进行数字处理，以产生调制到光信号的每个透射偏振上的符号的多位估计。 所述频域处理器对所述至少两种不同类型的损伤中的每一种表现出相应的不同响应。

    Equalization strategy for dual-polarization optical transport system
    30.
    发明申请
    Equalization strategy for dual-polarization optical transport system 有权
    双偏光光学传输系统的均衡策略

    公开(公告)号：US20050196176A1

    公开(公告)日：2005-09-08

    申请号：US10793801

    申请日：2004-03-08

    申请人： Han Sun ,  Kuang Wu

    发明人： Han Sun ,  Kuang Wu

    IPC分类号： H04B10/00

    CPC分类号： H04B10/2572 ,  H04B10/6162

    摘要： A method is provided for an equalization strategy for compensating channel distortions in a dual-polarization optical transport system wherein the received signal includes a complex signal of a first transmitted polarization component and a complex signal of a second transmitted polarization component. In a first step, a blind self-recovery mode used a blind adaptation algorithm in calculating and modifying multiple complex equalizer transfer function coefficients to enable recovery of only the complex signal of the first transmitted polarization component. By recovering only a single polarization component in the first step the degenerate case of recovering only a single transmitted signal at both polarization component outputs of an equalizer is prevented. In a second step, equalization is performed in a training mode for calculating and modifying the multiple complex equalizer transfer function coefficients to enable recovery of the complex signals of the first and second transmitted polarization components. In a third step, equalization is performed in a data directed mode for continuing to calculate and modify the multiple complex equalizer transfer function coefficients to ensure continued recovery of the complex signals of the first and second transmitted polarization components. The method is suited for a digital signal processing implementation in a coherent receiver when a modulation scheme used on a transmitted signal is quadriphase-shift keying (QPSK). In other embodiments, the method can be used with modulation schemes such as binary PSK, M-ary PSK where M>4, or Quadrature Amplitude Modulation (QAM).

    摘要翻译： 提供了一种用于补偿双极化光传输系统中的信道失真的均衡策略的方法，其中接收信号包括第一透射偏振分量的复信号和第二透射偏振分量的复信号。 在第一步中，盲自恢复模式使用盲适应算法来计算和修改多个复均衡器传递函数系数，以使得仅恢复第一透射偏振分量的复信号。 通过在第一步骤中仅恢复单个偏振分量，防止在均衡器的两个偏振分量输出处仅恢复单个发射信号的简并情况。 在第二步骤中，在用于计算和修改多个复均衡器传递函数系数的训练模式中执行均衡，以使得能够恢复第一和第二透射偏振分量的复信号。 在第三步骤中，以数据定向模式执行均衡，以继续计算和修改多个复均衡器传递函数系数，以确保第一和第二透射偏振分量的复信号的持续恢复。 当在发送信号上使用的调制方案是四相移键控（QPSK）时，该方法适用于相干接收机中的数字信号处理实现。 在其他实施例中，该方法可以与诸如二进制PSK，M-ary PSK，其中M> 4或正交幅度调制（QAM）的调制方案一起使用。