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    System and apparatus for distributing a signal to the front end of a multipath analog to digital converter
    1.
    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。

    Optical modulation schemes having reduced nonlinear optical transmission impairments
    3.
    发明授权
    Optical modulation schemes having reduced nonlinear optical transmission impairments 有权
    具有降低的非线性光传输损伤的光调制方案

    公开(公告)号：US09143238B2

    公开(公告)日：2015-09-22

    申请号：US13969694

    申请日：2013-08-19

    申请人： Kim B. Roberts ,  Maurice O'Sullivan ,  Mahmoud Taherzadehboroujeni ,  Shahab Oveis Gharan ,  Andrew D. Shiner ,  Michael Andrew Reimer

    发明人： Kim B. Roberts ,  Maurice O'Sullivan ,  Mahmoud Taherzadehboroujeni ,  Shahab Oveis Gharan ,  Andrew D. Shiner ,  Michael Andrew Reimer

    IPC分类号： H04B10/04 ,  H04B10/00 ,  H04B10/532 ,  H04B10/516

    CPC分类号： H04B10/532 ,  H04B10/516

    摘要： A method of transmitting a data signal using an optical transmitter of an optical communications system. The optical transmitter is configured to modulate an optical carrier in successive signalling intervals to generate an optical signal. A modulation scheme is provided which comprises a multi-dimensional symbol constellation. The modulation scheme is designed such that an average degree of polarization of a modulated optical signal output from the optical transmitter has a first value when averaged across a first signaling interval, and has a second value when averaged across more than one and fewer than 100 signaling intervals. The second value is less than 10 percent of the first value. During run-time, an encoder of the optical transmitter encoding a data signal to be transmitted as symbols of the constellation, and a modulator of the optical transmitter modulating available dimensions of the optical carrier in accordance with the symbols.

    摘要翻译： 一种使用光通信系统的光发射机发送数据信号的方法。 光发射机被配置为在连续的信令间隔中调制光载波以产生光信号。 提供了一种包括多维符号星座的调制方案。 调制方案被设计成使得当从第一信令间隔平均时，从光发送器输出的调制光信号的平均偏振度具有第一值，并且当平均多于一个且少于100个信令时具有第二值 间隔 第二个值小于第一个值的10％。 在运行时间期间，光发送器的编码器编码要作为星座符号发送的数据信号，以及根据符号调制光载波的可用尺寸的光发射机的调制器。

    Maximum likelihood decoding
    5.
    发明授权
    Maximum likelihood decoding 有权
    最大似然解码

    公开(公告)号：US09325427B1

    公开(公告)日：2016-04-26

    申请号：US13664576

    申请日：2012-10-31

    申请人： Shahab Oveis Gharan ,  Kim B. Roberts ,  Mahmoud Taherzadehboroujeni

    发明人： Shahab Oveis Gharan ,  Kim B. Roberts ,  Mahmoud Taherzadehboroujeni

    IPC分类号： H04B10/69 ,  H04B10/61

    CPC分类号： H04B10/695 ,  H04B10/612 ,  H04B10/613 ,  H04B10/614 ,  H04B10/616 ,  H04B10/697 ,  H04L1/0054

    摘要： In a coherent receiver of an optical communication system, a method of processing a detected symbol estimate to determine a most likely value of a corresponding transmitted data word, the transmitted data word comprising one or more data bits encoded in a transmitter using a predetermined constellation of at least two symbols. A set of two or more virtual constellation points are define in a decision region corresponding to a possible value of the data word. The detected symbol estimate is processed to find a most likely virtual constellation point given the detected symbol estimate. The most likely value of the corresponding transmitted data word is determined based on the most likely virtual constellation point.

    摘要翻译： 在光通信系统的相干接收机中，处理检测到的符号估计以确定对应的发送数据字的最可能值的方法，所发送的数据字包括使用预定的星座图的发送机中编码的一个或多个数据比特 至少两个符号。 在与数据字的可能值相对应的判定区域中定义一组两个或更多个虚拟星座点。 处理检测到的符号估计以找到给定检测到的符号估计的最可能的虚拟星座点。 基于最可能的虚拟星座点来确定对应的传输数据字的最可能的值。