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    System and apparatus for distributing a signal to the front end of a multipath analog to digital converter
    51.
    发明授权
    System and apparatus for distributing a signal to the front end of a multipath analog to digital converter 有权
    用于将信号分配到多路径模数转换器的前端的系统和装置

    公开(公告)号：US08818209B1

    公开(公告)日：2014-08-26

    申请号：US13526965

    申请日：2012-06-19

    申请人： William Martin Snelgrove ,  Kim B. Roberts ,  Bertram Leesti ,  Shahab Oveis Gharan ,  Mahmoud Taherzadehboroujeni

    发明人： William Martin Snelgrove ,  Kim B. Roberts ,  Bertram Leesti ,  Shahab Oveis Gharan ,  Mahmoud Taherzadehboroujeni

    IPC分类号： H04B10/06

    CPC分类号： H04B10/616

    摘要： A frequency decimation block for processing an analog input signal including a high-bandwidth data signal to generate a parallel set of parallel output signals, in which each output signal represents a respective portion of the high-bandwidth data signal. A preamplifier is provided for amplifying the input signal. A frequency domain divider divides the amplified input signal to generate a set of frequency band signals including a low frequency band signal, a mid-frequency band signal, and a high frequency band signal. Each frequency band signal is supplied to at least one signal path. A respective non-linear processor is connected in each of M signal paths processes the input signal using a respective branch signal to yield a corresponding composite signal. A respective Low-Pass Filter (LPF) is connected in each signal path, for low-pass filtering at least the composite signals to generate corresponding ones of the parallel output signals.

    摘要翻译： 一种用于处理包括高带宽数据信号的模拟输入信号以产生并行的并行输出信号的频率抽取块，其中每个输出信号表示高带宽数据信号的相应部分。 提供用于放大输入信号的前置放大器。 频域分频器对放大的输入信号进行分频，以产生包括低频带信号，中频带信号和高频带信号的一组频带信号。 每个频带信号被提供给至少一个信号路径。 在M个信号路径的每一个中连接相应的非线性处理器，使用相应的分支信号处理输入信号，以产生相应的复合信号。 相应的低通滤波器（LPF）连接在每个信号路径中，用于至少对复合信号进行低通滤波以产生对应的并行输出信号。

    SOFT DECODING OF DATA IN A COHERENT OPTICAL RECEIVER
    52.
    发明申请
    SOFT DECODING OF DATA IN A COHERENT OPTICAL RECEIVER 有权
    在一个相干光接收器中数据的软解码

    公开(公告)号：US20140212149A1

    公开(公告)日：2014-07-31

    申请号：US14227084

    申请日：2014-03-27

    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： H04B10/2507

    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。

    Soft decoding of data in a coherent optical receiver
    53.
    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。

    SIGNAL FRAMING IN A COHERENT OPTICAL RECEIVER
    54.
    发明申请
    SIGNAL FRAMING IN A COHERENT OPTICAL RECEIVER 有权
    相关光接收机中的信号帧

    公开(公告)号：US20130259493A1

    公开(公告)日：2013-10-03

    申请号：US13898874

    申请日：2013-05-21

    申请人： Kim B. ROBERTS

    发明人： Kim B. ROBERTS

    IPC分类号： H04L7/00

    CPC分类号： H04L7/0075 ,  H04B10/60 ,  H04B10/61 ,  H04B10/6162 ,  H04B10/6165 ,  H04L7/0004

    摘要： A method and system for a estimating a most likely location of a periodic SYNC burst within an optical signal received through an optical communications system. A cross-correlation is calculated between a multi-bit digital signal derived from the optical signal and a known symbol sequence of the SYNC burst. The cross-correlation is processed in at least one sub-block to identify a candidate sub-block in which the SYNC burst is most likely located. The candidate sub-block is then further analysed to estimate a location of the SYCN burst.

    摘要翻译： 一种用于估计通过光通信系统接收的光信号内的周期性SYNC突发的最可能位置的方法和系统。 在从光信号导出的多位数字信号和SYNC突发的已知符号序列之间计算互相关。 在至少一个子块中处理互相关以识别其中SYNC突发最可能位于的候选子块。 然后进一步分析候选子块以估计SYCN突发的位置。

    Clock recovery with channel coefficients
    55.
    发明授权
    Clock recovery with channel coefficients 有权
    时钟恢复与通道系数

    公开(公告)号：US08135283B2

    公开(公告)日：2012-03-13

    申请号：US12419368

    申请日：2009-04-07

    申请人： Han Sun ,  Kuang Tsan Wu ,  Kim B. Roberts

    发明人： Han Sun ,  Kuang Tsan Wu ,  Kim B. Roberts

    IPC分类号： H04B10/00

    CPC分类号： H03L7/0812 ,  H04B10/695 ,  H04L7/0087 ,  H04L7/0278

    摘要： In a coherent optical receiver of an optical communications network, a method of recovering a clock signal from a high speed optical signal received through an optical link. A set of compensation vectors are adaptively computed for compensating Inter-symbol Interference (ISI) due to at least polarization impairments of the optical signal. A channel delay is estimated based on the computed compensation vectors. The estimated channel delay is subtracted from the computed compensation vectors to generate corresponding modified compensation vectors. Finally, the modified compensation vectors are used to derive a recovered clock signal.

    摘要翻译： 在光通信网络的相干光接收机中，从通过光链路接收的高速光信号中恢复时钟信号的方法。 自适应地计算一组补偿矢量，用于补偿因至少光学信号的偏振损伤而引起的符号间干扰（ISI）。 基于所计算的补偿向量来估计信道延迟。 从所计算的补偿向量中减去估计的信道延迟，以产生相应的修改的补偿向量。 最后，修正的补偿向量用于导出恢复的时钟信号。

    Optical transmitter error reduction using receiver feedback
    56.
    发明授权
    Optical transmitter error reduction using receiver feedback 有权
    使用接收机反馈的光发射机误差降低

    公开(公告)号：US08131148B2

    公开(公告)日：2012-03-06

    申请号：US12211216

    申请日：2008-09-16

    申请人： Han Sun ,  Kuang Tsan Wu ,  Kim B. Roberts

    发明人： Han Sun ,  Kuang Tsan Wu ,  Kim B. Roberts

    IPC分类号： H04B10/08 ,  H04B10/00 ,  H04B10/04 ,  H04B10/12

    CPC分类号： H04B10/0799

    摘要： Described is a method of reducing transmitter error in an optical communications channel. An optical signal transmitted from an optical transmitter that has impairment due to transmitter error is processed to generate a digitally-equalized signal. A nonlinear characteristic of the digitally-equalized signal that relates to the transmitter error is determined. An optical control signal comprising data that are based on the nonlinear characteristic is transmitted to the optical transmitter. The optical transmitter modifies a transmitter parameter in response to the optical control signal to change the nonlinear characteristic and thereby reduce the impairment.

    摘要翻译： 描述了减少光通信信道中的发射机误差的方法。 处理从发射机发生故障的光发射机发送的光信号，生成数字均衡信号。 确定与发射机误差有关的数字均衡信号的非线性特性。 包括基于非线性特性的数据的光控制信号被发送到光发射机。 光发射机根据光控信号修改发射机参数，改变非线性特性，从而减少损伤。

    COHERENT AUGMENTED OPTICAL ADD-DROP MULTIPLEXER
    57.
    发明申请
    COHERENT AUGMENTED OPTICAL ADD-DROP MULTIPLEXER 有权
    相邻的增光光学多路复用器

    公开(公告)号：US20110268442A1

    公开(公告)日：2011-11-03

    申请号：US13124443

    申请日：2009-10-15

    申请人： David Boertjes ,  Kim B. Roberts ,  Maurice O'Sullivan ,  Giuseppe Bordogna

    发明人： David Boertjes ,  Kim B. Roberts ,  Maurice O'Sullivan ,  Giuseppe Bordogna

    IPC分类号： H04J14/02

    CPC分类号： H04Q11/0005 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0217 ,  H04Q2011/0015 ,  H04Q2011/0016

    摘要： In an Optical Add-Drop Multiplexer, a drop section comprises a Wavelength Selective Switch (WSS) having at least one drop-port, the WSS being operative to couple a respective set of w (where w>1) wavelength channels from a received Wavelength Division Multiplexed (WDM) signal to each drop port. A respective 1:s power splitter is associated with each drop port. Each power splitter supplies the respective set of channels received from its drop port to each one of a corresponding set of coherent receivers. Each coherent receiver operates to receive a selected one of the respective set of channels.

    摘要翻译： 在光插入多路复用器中，丢弃部分包括具有至少一个丢弃端口的波长选择性交换机（WSS），所述WSS可操作以将w（1）个波长信道的相应集合从接收的波长 分路复用（WDM）信号到每个分接口。 相应的1：s功率分配器与每个分接口相关联。 每个功率分配器将从其分支端口接收的相应的一组信道提供给相应的一组相干接收机中的每一个。 每个相干接收器操作以接收相应通道组中的所选择的一个。

    ZERO MEAN CARRIER RECOVERY
    59.
    发明申请
    ZERO MEAN CARRIER RECOVERY 有权
    零平均承运人恢复

    公开(公告)号：US20110150505A1

    公开(公告)日：2011-06-23

    申请号：US12644409

    申请日：2009-12-22

    申请人： Kim B. ROBERTS ,  Ahmed AWADALLA

    发明人： Kim B. ROBERTS ,  Ahmed AWADALLA

    IPC分类号： H04B10/06

    CPC分类号： H04B10/6164 ,  H04B10/60 ,  H04B10/611 ,  H04B10/6161

    摘要： A method of data symbol recovery in a coherent receiver of an optical communications system. Two or more SYNC bursts, having a known symbol sequence and periodicity, are processed to derive an estimate of a frequency offset Δf between a transmit laser and a Local Oscillator (LO) of the receiver. A phase rotation κ(n) is computed based on the estimate of the frequency offset Δf, and applied to a plurality of data symbol estimates to generate corresponding rotated symbol estimates. The rotated symbol estimates are then filtered to generate corresponding decision values of each data symbol.

    摘要翻译： 一种在光通信系统的相干接收机中进行数据符号恢复的方法。 处理具有已知符号序列和周期性的两个或多个SYNC突发，以导出接收机的发射激光器和本地振荡器（LO）之间的频率偏移＆Dgr; f的估计。 基于频率偏移＆Dgr; f的估计来计算相位旋转kgr（n），并将其应用于多个数据符号估计以产生相应的旋转符号估计。 然后对旋转的符号估计进行滤波以产生每个数据符号的相应决定值。