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    Optical signal transmitter with active optical e-field degradation
    4.
    发明授权
    Optical signal transmitter with active optical e-field degradation 有权
    具有主动光电子场退化的光信号发射器

    公开(公告)号：US07561797B1

    公开(公告)日：2009-07-14

    申请号：US11362756

    申请日：2006-02-28

    申请人： James Harley ,  Kim B. Roberts

    发明人： James Harley ,  Kim B. Roberts

    IPC分类号： H04B10/08 ,  H04B10/04

    CPC分类号： H04B10/0793

    摘要： A method and system for controlling optical signal to noise ratio (OSNR) of an optical signal at a receiver end of an optical link. A multi-bit sample stream is generated using a compensation function adapted to compensate impairments of the optical link A digital noise signal is generated and added to the multi-bit sample stream, and the resulting signal used to generate a degraded optical signal, which is then transmitted through the optical link.

    摘要翻译： 一种用于控制光链路的接收机端的光信号的光信噪比（OSNR）的方法和系统。 使用适于补偿光链路的损伤的补偿功能来生成多比特采样流。数字噪声信号被生成并添加到多比特采样流，并且所产生的信号用于产生劣化的光信号，其是 然后通过光链路传输。

    Frequency domain multiplex optical transmission
    7.
    发明授权
    Frequency domain multiplex optical transmission 有权

    公开(公告)号：US09859984B2

    公开(公告)日：2018-01-02

    申请号：US15281986

    申请日：2016-09-30

    申请人： James Harley ,  Roger Carroll ,  Shahab Oveis Gharan ,  Kim B. Roberts

    发明人： James Harley ,  Roger Carroll ,  Shahab Oveis Gharan ,  Kim B. Roberts

    IPC分类号： H04B10/516 ,  H04B10/50 ,  H04B10/61 ,  H04B10/548

    CPC分类号： H04B10/516 ,  H04B10/505 ,  H04B10/548 ,  H04B10/616

    摘要： A transmitter comprises a complex mixer to generate a single I analog drive signal and a single Q analog drive signal, and a single multi-dimensional optical modulator configured to modulate an optical carrier light using the single I analog drive signal and the single Q analog drive signal to produce a modulated optical signal for transmission. Alternatively, a transmitter comprises a complex mixer to generate two I analog drive signals and two Q analog drive signals, and a single multi-dimensional multiple-electrode optical modulator configured to modulate an optical carrier light using the analog drive signals to produce a modulated optical signal for transmission. In both transmitters, the optical carrier light is produced by a single laser, and frequency components of the first data signal are located in a different portion of a spectrum of the modulated optical signal than frequency components of the second data signal.

    Constrained continuous phase modulation and demodulation in an optical communications system
    8.
    发明授权
    Constrained continuous phase modulation and demodulation in an optical communications system 有权
    光通信系统中的约束连续相位调制和解调

    公开(公告)号：US08983309B2

    公开(公告)日：2015-03-17

    申请号：US13371846

    申请日：2012-02-13

    申请人： James Harley ,  Douglas McGhan ,  Shahab Oveis Gharan ,  Kim B. Roberts ,  Mark Rollins

    发明人： James Harley ,  Douglas McGhan ,  Shahab Oveis Gharan ,  Kim B. Roberts ,  Mark Rollins

    IPC分类号： H04B10/06 ,  H04B10/04

    CPC分类号： H04B10/5561

    摘要： A transmitter in an optical communications system includes a digital signal processor for processing a data signal to generate a sample stream encoding successive symbols in accordance with a constrained phase modulation scheme having a constellation of at least two symbols and a modulation phase constrained to a phase range spanning less than 4π. A digital-to-analog converter converts the sample stream into a corresponding analog drive signal. A finite range phase modulator modulates a phase of a continuous wavelength channel light in accordance with the analog drive signal, to generate a modulated channel light for transmission through the optical communications system. A receiver in the optical communications system includes an optical stage for detecting phase and amplitude of the modulated channel light and for generating a corresponding sample stream, and a digital signal processor for processing the sample stream to estimate each successive symbol of the modulated channel light.

    摘要翻译： 光通信系统中的发射机包括数字信号处理器，用于处理数据信号以产生根据具有至少两个符号的星座的约束相位调制方案编码连续码元的采样流，以及限制为相位范围的调制相位 跨度小于4＆pgr。 数模转换器将采样流转换成相应的模拟驱动信号。 有限范围相位调制器根据模拟驱动信号调制连续波长信道光的相位，以产生用于通过光通信系统传输的调制信道光。 光通信系统中的接收机包括用于检测调制信道光的相位和幅度并用于产生相应样本流的光学级，以及用于处理样本流以估计调制信道光的每个连续符号的数字信号处理器。

    Low density parity check (LDPC) decoder using broadcast messaging
    9.
    发明授权
    Low density parity check (LDPC) decoder using broadcast messaging 有权
    低密度奇偶校验（LDPC）解码器使用广播消息

    公开(公告)号：US08230294B2

    公开(公告)日：2012-07-24

    申请号：US12182575

    申请日：2008-07-30

    申请人： Kim B. Roberts ,  Manoj Verghese ,  James Harley ,  David Damian Nicholas Bevan

    发明人： Kim B. Roberts ,  Manoj Verghese ,  James Harley ,  David Damian Nicholas Bevan

    IPC分类号： G06F11/00

    CPC分类号： H03M13/1134 ,  H03M13/1114 ,  H04L1/0052 ,  H04L1/0057

    摘要： In a decoder implementing a belief propagation algorithm for iteratively decoding a Low Density Parity Check (LDPC) encoded data block, a method of computing messages to be sent by a first node of the decoder to at least one neighbor node of the decoder. The method comprises: processing messages received by the first node to remove an echo of a previous message sent by the first node to the at least one neighbor node in a previous iteration, to yield corresponding modified messages; computing a message for a current iteration using the modified messages; and broadcasting the computed message for the current iteration to each of the at least one neighbor nodes.

    摘要翻译： 在实现用于对低密度奇偶校验（LDPC）编码数据块进行迭代解码的置信传播算法的解码器中，一种计算将要由解码器的第一节点发送到解码器的至少一个相邻节点的消息的方法。 该方法包括：处理由第一节点接收的消息，以将先前迭代中的第一节点发送的先前消息的回波消除到至少一个相邻节点，以产生相应的修改消息; 使用修改的消息计算当前迭代的消息; 以及将针对当前迭代的所计算的消息广播到所述至少一个相邻节点中的每一个。

    Control of parameters in a global optical controller
    10.
    发明授权
    Control of parameters in a global optical controller 有权
    控制全局光控制器中的参数

    公开(公告)号：US07894721B2

    公开(公告)日：2011-02-22

    申请号：US11533166

    申请日：2006-09-19

    申请人： Kim B. Roberts ,  Genzao G. Zhang ,  James Harley ,  Feng Shi ,  Leo Strawczynski

    发明人： Kim B. Roberts ,  Genzao G. Zhang ,  James Harley ,  Feng Shi ,  Leo Strawczynski

    IPC分类号： H04B10/08 ,  H04B17/00

    CPC分类号： H04J14/0227 ,  H04B10/0793 ,  H04J14/0201 ,  H04J14/0221 ,  H04J14/0246 ,  H04J14/0279

    摘要： An optical network system having a global controller capable of controlling all the elements of the network. The controller receives performance data from each optical network element and calculates a performance value for each channel transmitting through the system. The controller then isolates the channel with the minimum performance value and tests possible changes in network element parameters to find a change which would increase this performance value. Once such a change is found, it is implemented and the system is reoptimized.

    摘要翻译： 一种具有能够控制网络的所有元素的全局控制器的光网络系统。 控制器从每个光网络元件接收性能数据，并计算通过系统传输的每个通道的性能值。 然后，控制器将通道与最小性能值隔离，并测试网元参数的可能变化，以找到会增加此性能值的更改。 一旦发现了这样的变化，就会实现这一改变，系统被重新优化。