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公开(公告)号：US09667348B1
公开(公告)日：2017-05-30
申请号：US13495630
申请日：2012-06-13
CPC分类号： H04B10/60 , H04B10/616 , H04L25/00 , H04L27/00 , H04L27/265
摘要： A receiver of an optical communications system includes a set of two or more analog-to digital A/D converters, a respective transform block connected to an output of each A/D converter, and a summation block. Each A/D converter samples a respective low-bandwidth analog signal comprising a respective portion of a high-bandwidth data signal. Each transform block calculates a set of spectral components of the respective low-bandwidth analog signal. The summation block combines respective spectral components calculated by each transform block to construct spectral terms of a combined signal having a spectrum corresponding to that of the high-bandwidth data signal.
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2.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。
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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。
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公开(公告)号：US09071362B1
公开(公告)日：2015-06-30
申请号：US13655497
申请日：2012-10-19
IPC分类号： H04B10/04 , H04B10/516
CPC分类号： H04B10/516 , H04B10/5161 , H04B10/532 , H04B10/5561
摘要： A method of transmitting data. The method comprises preliminarily providing a modulation scheme comprising an N-symbol constellation defined in an M-dimensional space, wherein N
摘要翻译： 一种传输数据的方法。 该方法包括预先提供包括在M维空间中定义的N符号星座的调制方案，其中N <2M，并且星座内给定的一对符号之间的复合距离随着在编码的数据字之间的汉明距离的增加而增加 每个符号。 在运行时间期间，要发送的数据信号被编码为星座的符号，并且根据符号被调制到载波的至少M个维度上。
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公开(公告)号：US09325427B1
公开(公告)日：2016-04-26
申请号：US13664576
申请日：2012-10-31
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。
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公开(公告)号：US11201695B2
公开(公告)日：2021-12-14
申请号：US17226287
申请日：2021-04-09
摘要： A method performed at an electronic device comprises receiving information bits, a first nub, and a second nub, each nub comprising redundant values; calculating first calculated determiners from first subsets of the information bits along a first dimension; calculating first corrected determiners by applying first FEC decoding to a combination of the first calculated determiners and the first nub; correcting at least one error in the information bits using a difference between the first corrected determiners and the first calculated determiners; calculating second calculated determiners from second subsets of the information bits along a second dimension that differs from the first dimension; calculating second corrected determiners by applying second FEC decoding to a combination of the second calculated determiners and the second nub; and correcting at least one additional error in the information bits using a difference between the second corrected determiners and the second calculated determiners.
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公开(公告)号：US11126219B2
公开(公告)日：2021-09-21
申请号：US16599678
申请日：2019-10-11
摘要： A receiver apparatus comprises circuitry configured for storing a first sequence of values. At the receiver apparatus, a communications signal is received which conveys a second sequence of values, the second sequence of values being related to the first sequence of values. According to some examples, the second sequence of values is identical to the first sequence of values. At the receiver apparatus, P results are calculated from a cross-correlation of the first sequence of values with at least a portion of a representation of the communications signal, where P is a positive integer. According to some examples, P≥2. An estimate of a phase offset of a continuous clock is calculated as a function of the P results. According to some examples, the function is a non-linear function. The estimate of the clock phase offset may be used to achieve clock recovery at the receiver apparatus.
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公开(公告)号：US11038599B1
公开(公告)日：2021-06-15
申请号：US17064910
申请日：2020-10-07
IPC分类号： H04B10/00 , H04B10/61 , H04B17/391
摘要： A receiver applies first processing to a digital representation of a received signal to generate a first processed signal having first additive noise and first linear inter-symbol interference (ISI), the first processing comprising a substantially linear operation designed to substantially minimize a sum of variances of the first additive noise and the first linear ISI. The receiver applies second processing to the first processed signal to generate a second processed signal having second additive noise and second linear ISI, the second processing comprising a substantially nonlinear operation designed (i) to make a variance of the second additive noise substantially lower than the variance of the first additive noise, and (ii) to make a sum of the variance of the second additive noise and a variance of the second linear ISI substantially lower than the sum of the variances of the first additive noise and first linear ISI.
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公开(公告)号：US09088387B2
公开(公告)日：2015-07-21
申请号：US13949627
申请日：2013-07-24
CPC分类号： H04L1/00 , H03M13/1515 , H03M13/251 , H03M13/6325
摘要： A method of recovering a value of a symbol received through an optical communications system. A multi-bit estimate of the symbol is subdivided into a first part and a second part, each part including at least one respective bit of the estimate. A most likely value of the first part is detected. The most likely value of the first part is processed using a Forward Error Correction (FEC) decoder to generate a corrected first part value, which is used to detect a most likely value of the second part. The most likely value of the second part is then processed by the FEC decoder to generate a corrected second part, which is combined with the corrected first part to recover the value of the symbol.
摘要翻译： 一种恢复通过光通信系统接收的符号的值的方法。 符号的多位估计被细分为第一部分和第二部分，每个部分包括估计的至少一个相应位。 检测到第一部分的最有可能的值。 使用前向纠错（FEC）解码器处理第一部分的最可能的值，以产生校正的第一部分值，其用于检测第二部分的最可能的值。 然后由FEC解码器处理第二部分的最可能的值，以产生校正的第二部分，其与校正的第一部分组合以恢复符号的值。
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公开(公告)号：US10484131B2
公开(公告)日：2019-11-19
申请号：US15841988
申请日：2017-12-14
摘要： Client data bits, including first client data bits and second client data bits, are communicated from a transmitter to a receiver. At the transmitter, the first client data bits are processed to generate processed values, where each processed value is more likely to be a first element than a second element. Forward Error Correction ‘FEC’ encoding is applied to the second client data bits to generate FEC-encoded values. Symbols are created by mapping the FEC-encoded values to first positions in the symbols and by mapping the processed values to second positions in the symbols. The symbols are modulated onto a communications channel using a modulation scheme with a code that assigns a lower average energy to symbols containing the first elements in the second positions than to symbols containing the second elements in the second positions. At the receiver, client data bits are decoded using conditional chain decoding.
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