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11. 发明申请

US20120263466A1 MULTIDIMENSIONAL HYBRID MODULATIONS FOR ULTRA-HIGH-SPEED OPTICAL TRANSPORT 有权
标题翻译：用于超高速光学传输的多维混合调制
公开(公告)号：US20120263466A1
公开(公告)日：2012-10-18
申请号：US13441814
申请日：2012-04-06
申请人： Ivan B. Djordjevic , Lei Xu , Ting Wang
发明人： Ivan B. Djordjevic , Lei Xu , Ting Wang
IPC分类号： H04J14/06 , H04B10/12 , H04B10/04
CPC分类号： H04B10/2581 , H04L27/2096
摘要： Systems and methods are disclosed with a spatial-domain-based multi-dimensional coded-modulation scheme that improves dramatically OSNR sensitivity and tolerance to fiber nonlinearities by using D-dimensional signal constellations, where D=2(2+M)N. The factor 2 originates from two polarizations, 2+M electrical basis functions are selected (2 in-phase/quadrature channels and M pulse-position like basis functions), and N represents the number of orbital angular momentum (OAM) states used in FMFs/MMFs. For single mode fiber applications N is 1.
摘要翻译：公开了具有基于空间域的多维编码调制方案的系统和方法，通过使用D维2信号星座（D = 2（2 + M）N），可以显着提高OSNR灵敏度和对光纤非线性的容限。因子2源于两个极化，选择2 + M电基函数（2个同相/正交通道和M个脉冲位置，如基函数），N表示FMF中使用的轨道角动量（OAM）状态的数量 / MMFs。对于单模光纤应用，N为1。

12. 发明申请

US20120257895A1 FOUR-DIMENSIONAL OPTICAL MULTIBAND-OFDM FOR BEYOND 1.4TB/S SERIAL OPTICAL TRANSMISSION 有权
标题翻译：用于1.4TB / S串行光传输的四维光学多通道OFDM
公开(公告)号：US20120257895A1
公开(公告)日：2012-10-11
申请号：US13251214
申请日：2011-10-01
申请人： Ivan B. Djordjevic , Lei Xu , Ting Wang
发明人： Ivan B. Djordjevic , Lei Xu , Ting Wang
IPC分类号： H04J14/06 , H04J14/00
CPC分类号： H04B10/548 , H04J14/06 , H04L27/2628 , H04L27/265 , H04L27/2697
摘要： Systems and methods are disclosed to perform four-dimensional optical multiband OFDM communication by organizing an N-dimensional (ND) signal constellation points as a signal matrix; performing 2D-inverse FFT and 2D-FFT to perform modulation and demodulation, respectively; and applying both orthogonal polarizations in the OFDM communication to deal with chromatic dispersion, PMD and PDL effects, and multidimensional signal constellation to improve optical signal-to-noise ratio (OSNR) sensitivity.
摘要翻译：公开了通过组织N维（ND）信号星座点作为信号矩阵来执行四维光多频带OFDM通信的系统和方法; 分别执行2D反FFT和2D-FFT以进行调制和解调; 并且在OFDM通信中应用正交偏振以处理色散，PMD和PDL效应以及多维信号星座以提高光信噪比（OSNR）灵敏度。

13. 发明授权

US08185796B2 Mitigation of fiber nonlinearities in multilevel coded-modulation schemes 有权
标题翻译：多级编码调制方案中光纤非线性的减轻
公开(公告)号：US08185796B2
公开(公告)日：2012-05-22
申请号：US12392335
申请日：2009-02-25
申请人： Ivan B. Djordjevic , Lei Xu , Ting Wang
发明人： Ivan B. Djordjevic , Lei Xu , Ting Wang
IPC分类号： G06F11/00
CPC分类号： H03M13/1117 , H03M13/2957 , H03M13/6331 , H04L1/005 , H04L1/0057 , H04L1/0071 , H04L5/0008 , H04L25/03171 , H04L25/03203 , H04L25/067 , H04L27/223 , H04L27/2649 , H04L2025/03363 , H04L2025/03414 , H04L2025/03611
摘要： A receiver and method are provided for mitigation of finer non-linearities in multilevel coded-modulation schemes. The receiver includes a multilevel Bahl-Cocke-Jelinek-Raviv (BCJR) equalizer configured to receive channel samples of an input signal, partially mitigate fiber non-linearities, and provide symbol reliabilities. The receiver further includes a bit probabilities module coupled to the BCJR equalizer configured to calculate soft bit reliabilities from the symbol reliabilities. The receiver also includes one or more low-density parity-check (LDPC) decoders coupled to the bit probabilities module and the BCJR equalizer, configured to receive the soft bit reliabilities and output code words. The one or more LDPC decoders iteratively provide extrinsic soft information feedback to the BCJR equalizer to compensate for the fiber non-linearities.
摘要翻译：提供了一种用于缓解多电平编码调制方案中更精细的非线性的接收机和方法。接收机包括一个多层次Bahl-Cocke-Jelinek-Raviv（BCJR）均衡器，被配置为接收输入信号的信道样本，部分地减轻光纤非线性并提供符号可靠性。接收机还包括耦合到BCJR均衡器的位概率模块，其被配置为从符号可靠性计算软比特可靠性。接收机还包括耦合到比特概率模块和BCJR均衡器的一个或多个低密度奇偶校验（LDPC）解码器，被配置为接收软比特可靠性和输出码字。一个或多个LDPC解码器向BCJR均衡器迭代地提供外部软信息反馈以补偿光纤非线性。

14. 发明授权

US08184993B2 Polarization mode dispersion (PMD) compensation in polarization multiplexed coded orthogonal frequency division multiplexing (OFDM) systems 有权
标题翻译：偏振复用编码正交频分复用（OFDM）系统中的偏振模色散（PMD）补偿
公开(公告)号：US08184993B2
公开(公告)日：2012-05-22
申请号：US12392317
申请日：2009-02-25
申请人： Ivan B. Djordjevic , Lei Xu , Ting Wang
发明人： Ivan B. Djordjevic , Lei Xu , Ting Wang
IPC分类号： H04B10/00
CPC分类号： H04L27/2647 , H03M13/1102 , H03M13/2957 , H03M13/31 , H03M13/6561 , H04B10/2572 , H04B10/548 , H04L1/005 , H04L1/0057 , H04L1/0066
摘要： A receiver and method are provided. The receiver includes a detector configured to receive polarization multiplexed coded orthogonal frequency division multiplexing input sequences and generate estimates of unknown transmitted symbols in the input sequences for x- and y-polarization channels with respect to laser phase noise and PMD. A demapper coupled to the detector is configured to partially cancel polarization mode dispersion (PMD) in the input sequences by computing symbol probabilities for the estimates with respect to the laser phase noise, and averaging the symbol probabilities with respect to the laser phase noise. One or more low-density parity-check (LDPC) decoders coupled to the demapper are configured to receive bit probabilities derived from the averaged symbol probabilities and output code words based at least on the bit probabilities. The one or more LDPC decoders iteratively provide extrinsic soft information feedback to the demapper to compensate for the PMD.
摘要翻译：提供接收机和方法。接收机包括检测器，其被配置为接收偏振复用的编码的正交频分复用输入序列，并且针对相对于激光相位噪声和PMD的x和y偏振通道的输入序列生成未知发射符号的估计。耦合到检测器的去映射器被配置为通过计算关于激光相位噪声的估计的符号概率，并相对于激光相位噪声来平均符号概率来部分地消除输入序列中的偏振模色散（PMD）。耦合到解映射器的一个或多个低密度奇偶校验（LDPC）解码器被配置为从至少基于位概率接收从平均符号概率导出的比特概率和输出码字。一个或多个LDPC解码器向解映射器反复地提供外在的软信息反馈以补偿PMD。

15. 发明授权

US08977121B2 Spatial domain based multi dimensional coded modulation for multi Tb per second serial optical transport networks 有权
标题翻译：用于多Tb每秒串行光传输网络的基于空间域的多维编码调制
公开(公告)号：US08977121B2
公开(公告)日：2015-03-10
申请号：US13270213
申请日：2011-10-10
申请人： Ivan B. Djordjevic , Lei Xu , Ting Wang
发明人： Ivan B. Djordjevic , Lei Xu , Ting Wang
IPC分类号： H04J14/04 , H04J14/02 , H04B10/25 , H04B10/291 , H04J14/06
CPC分类号： H04J14/0278 , H04B10/25 , H04B10/291 , H04J14/0201 , H04J14/04 , H04J14/06
摘要： An optical transport network based on multimode/multicore fibers includes a mode-multiplexer to multiplex independent data streams from one or more transmitters; a multimode erbium-doped fiber amplifier (MM EDFA) to compensate for MMF loss; a multimode optical add-drop multiplexer (MM OADM) to add and/or drop multimode channels in multimode networks; a multimode optical cross-connect; and a mode-demultiplexer to separate various mode streams to one or more receivers.
摘要翻译：基于多模/多芯光纤的光传输网络包括：多路复用器，用于复用来自一个或多个发射机的独立数据流; 用于补偿MMF损耗的多模掺铒光纤放大器（MM EDFA）; 多模光分插复用器（MM OADM），用于在多模网络中添加和/或删除多模信道; 多模光交叉连接; 以及模式解复用器，用于将各种模式流分离到一个或多个接收器。

16. 发明授权

US08699625B2 Generalized OFDM (GOFDM) for ultra-high-speed serial optical transport networks 有权
标题翻译：用于超高速串行光传输网络的广义OFDM（GOFDM）
公开(公告)号：US08699625B2
公开(公告)日：2014-04-15
申请号：US13270211
申请日：2011-10-10
申请人： Ivan B. Djordjevic , Lei Xu , Ting Wang
发明人： Ivan B. Djordjevic , Lei Xu , Ting Wang
IPC分类号： H03K9/00 , H04Q11/02 , H04B3/20
CPC分类号： H04L1/0057 , H04L1/0042 , H04L5/0016 , H04L5/04 , H04L25/067 , H04L27/2628 , H04L27/3427
摘要： A coded multidimensional modulation system called generalized OFDM (GOFDM) uses orthogonal subcarriers as bases functions, and the signal constellation points of corresponding multidimensional constellation diagram are obtained as N-dimensional Cartesian product of one-dimensional PAM/two-dimensional QAM. In GOFDM, the N-dimensional/2N-dimensional signal constellation point is transmitted over all N subcarriers/2N-subcarriers, which serve as individual bases functions. Even if some of the subcarriers are severely affected by channel distortion, the overall signal constellation point will face only small distortion, when strong channel capacity achieving channel codes are used. In addition, because the channel capacity is a linear function of number of dimensions, the spectral efficiency of optical transmission systems is significantly improved. Finally, since Euclidean distance of multidimensional signal constellation is much larger that that of two-dimensional signal constellations, OSNR sensitivity is dramatically improved.
摘要翻译：称为广义OFDM（GOFDM）的编码多维调制系统使用正交子载波作为基本功能，并且获得相应多维星座图的信号星座点作为一维PAM /二维QAM的N维笛卡尔乘积。在GOFDM中，N维/ 2N维信号星座点在用作各个基本功能的所有N个子载波/ 2N个子载波上发送。即使某些子载波受到信道失真的严重影响，当使用实现信道码的强信道容量时，整个信号星座点也只会面临小的失真。另外，由于信道容量是维数的线性函数，所以光传输系统的频谱效率显着提高。最后，由于多维信号星座的欧几里德距离远大于二维信号星座的距离，因此OSNR灵敏度得到显着提高。

17. 发明申请

US20120263251A1 GENERALIZED OFDM (GOFDM) FOR ULTRA-HIGH-SPEED SERIAL OPTICAL TRANSPORT NETWORKS 有权
标题翻译：用于超高速串行光传输网络的通用OFDM（GOFDM）
公开(公告)号：US20120263251A1
公开(公告)日：2012-10-18
申请号：US13270211
申请日：2011-10-10
申请人： Ivan B. Djordjevic , Lei Xu , Ting Wang
发明人： Ivan B. Djordjevic , Lei Xu , Ting Wang
IPC分类号： H04L23/02 , H04L27/28
CPC分类号： H04L1/0057 , H04L1/0042 , H04L5/0016 , H04L5/04 , H04L25/067 , H04L27/2628 , H04L27/3427
摘要： A coded multidimensional modulation system called generalized OFDM (GOFDM) uses orthogonal subcarriers as bases functions, and the signal constellation points of corresponding multidimensional constellation diagram are obtained as N-dimensional Cartesian product of one-dimensional PAM/two-dimensional QAM. In GOFDM, the N-dimensional/2N-dimensional signal constellation point is transmitted over all N subcarriers/2N-subcarriers, which serve as individual bases functions. Even if some of the subcarriers are severely affected by channel distortion, the overall signal constellation point will face only small distortion, when strong channel capacity achieving channel codes are used. In addition, because the channel capacity is a linear function of number of dimensions, the spectral efficiency of optical transmission systems is significantly improved. Finally, since Euclidean distance of multidimensional signal constellation is much larger that that of two-dimensional signal constellations, OSNR sensitivity is dramatically improved.
摘要翻译：称为广义OFDM（GOFDM）的编码多维调制系统使用正交子载波作为基本功能，并且获得相应多维星座图的信号星座点作为一维PAM /二维QAM的N维笛卡尔乘积。在GOFDM中，N维/ 2N维信号星座点在用作各个基本功能的所有N个子载波/ 2N个子载波上发送。即使某些子载波受到信道失真的严重影响，当使用实现信道码的强信道容量时，整个信号星座点也只会面临小的失真。另外，由于信道容量是维数的线性函数，所以光传输系统的频谱效率显着提高。最后，由于多维信号星座的欧几里德距离远大于二维信号星座的距离，因此OSNR灵敏度得到显着提高。

18. 发明授权

US08219874B2 Multi-dimensional LDPC coded modulation for high-speed optical transmission systems 有权
标题翻译：用于高速光传输系统的多维LDPC编码调制
公开(公告)号：US08219874B2
公开(公告)日：2012-07-10
申请号：US12535423
申请日：2009-08-04
申请人： Ivan B. Djordjevic , Hussam G. Batshon , Lei Xu , Ting Wang
发明人： Ivan B. Djordjevic , Hussam G. Batshon , Lei Xu , Ting Wang
IPC分类号： H03M13/00 , G06F11/00
CPC分类号： H03M13/255 , H03M13/116 , H03M13/2703 , H03M13/6325 , H04L1/005 , H04L1/0057
摘要： Arbitrarily high data transmission rates may be achieved by the use of N-dimensional, LDPC-coded modulation. N orthonormal basis functions are employed using coherent reception, resulting in a proportional increase in transmission rate with only a modest increase in bit-error ratio.
摘要翻译：可以通过使用N维，LDPC编码的调制来实现任意高的数据传输速率。使用相干接收使用N个正交基函数，导致传输速率的比例增加，而误码率仅有适度的增加。

19. 发明授权

US08099645B2 LDPC codes and stochastic decoding for optical transmission 有权
标题翻译：用于光传输的LDPC码和随机解码
公开(公告)号：US08099645B2
公开(公告)日：2012-01-17
申请号：US12195525
申请日：2008-08-21
申请人： Ivan B. Djordjevic , Lei Xu , Ting Wang
发明人： Ivan B. Djordjevic , Lei Xu , Ting Wang
IPC分类号： G06F11/00
CPC分类号： H04L1/0057 , H03M13/1128 , H03M13/6569 , H03M13/6577 , H04L1/005
摘要： A method for error correction and a decoder using low density parity check (LDPC) codes includes initializing extrinsic probability information between variable nodes and check nodes in a bipartite graph including generating a Bernoulli sequence according to a probability of a bit having a value one. Parity checking is performed in accordance with a parity check equation. If the parity check equation is not satisfied, then extrinsic information is updated in check nodes from variable nodes using a parity node update logic circuit in a first half iteration, extrinsic information is updated in variable nodes from check nodes using a variable node update logic circuit in a second half iteration, and the variable nodes are updated with a probability based upon the extrinsic information passed between check nodes and variable nodes wherein the probability represents a likelihood that an ith bit is a one. Information bits are passed when the parity check equation is satisfied or a predetermined number of iterations has been reached.
摘要翻译：用于纠错的方法和使用低密度奇偶校验（LDPC）码的解码器包括在二分图中的可变节点和校验节点之间初始化外在概率信息，包括根据具有值1的比特的概率生成伯努利序列。根据奇偶校验方程执行奇偶校验。如果奇偶校验方程不满足，则在第一半迭代中使用奇偶校验节点更新逻辑电路，从可变节点的校验节点中更新外部信息，使用可变节点更新逻辑电路从校验节点在变量节点中更新外部信息在第二半迭代中，并且基于在校验节点和可变节点之间传递的外部信息的概率来更新变量节点，其中概率表示第i位是一个的可能性。当满足奇偶校验等式或达到预定数量的迭代时，信息比特被传递。

20. 发明申请

US20100211849A1 MULTI-DIMENSIONAL LDPC CODED MODULATION FOR HIGH-SPEED OPTICAL TRANSMISSION SYSTEMS 有权
标题翻译：用于高速光传输系统的多维LDPC编码调制
公开(公告)号：US20100211849A1
公开(公告)日：2010-08-19
申请号：US12535423
申请日：2009-08-04
申请人： Ivan B. Djordjevic , Hussam G. Batshon , Lei Xu , Ting Wang
发明人： Ivan B. Djordjevic , Hussam G. Batshon , Lei Xu , Ting Wang
IPC分类号： H03M13/00 , G06F11/10 , G06F11/08
CPC分类号： H03M13/255 , H03M13/116 , H03M13/2703 , H03M13/6325 , H04L1/005 , H04L1/0057
摘要： Arbitrarily high data transmission rates may be achieved by the use of N-dimensional, LDPC-coded modulation. N orthonormal basis functions are employed using coherent reception, resulting in a proportional increase in transmission rate with only a modest increase in bit-error ratio.
摘要翻译：可以通过使用N维，LDPC编码的调制来实现任意高的数据传输速率。使用相干接收使用N个正交基函数，导致传输速率的比例增加，而误码率仅有适度的增加。

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