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公开(公告)号：US07356256B1
公开(公告)日：2008-04-08
申请号：US10629834
申请日：2003-07-30
申请人： Leo Strawczynski , Kim B. Roberts , John McNicol
发明人： Leo Strawczynski , Kim B. Roberts , John McNicol
IPC分类号： H04B10/08
CPC分类号： H04B10/077 , H04B10/07955 , H04B2210/258
摘要： A digital performance monitoring method and system for an optical communications system utilizes a channel monitor and a digital signal processor (DSP). The channel monitor is designed to monitor a respective channel signal of the optical communications system, and includes a sample memory for storing sample data including a set of sequential N-bit (where N>1) samples generated by an Analog-to-Digital (A/D) converter at a predetermined sample rate. The digital signal processor (DSP) is designed to calculate at least one performance parameter of the optical communications system based on the stored sample data. The sample rate of the A/D converter is at least equal to a baud rate of the channel, and preferably satisfies the Nyquist criterion. Multiple A/D converters may be used parallel to sample respective orthogonal components of the channel signal. In this case, the stored sample data may be representative of the complex E-field of the channel signal.
摘要翻译： 用于光通信系统的数字性能监测方法和系统利用信道监视器和数字信号处理器（DSP）。 信道监视器被设计为监视光通信系统的相应信道信号，并且包括用于存储样本数据的采样存储器，该采样数据包括由模数（数字）信号产生的一组顺序N位（其中N≥1） A / D）转换器。 数字信号处理器（DSP）被设计为基于存储的采样数据来计算光通信系统的至少一个性能参数。 A / D转换器的采样率至少等于通道的波特率，并且优选地满足奈奎斯特准则。 可以并行地使用多个A / D转换器来采样信道信号的各个正交分量。 在这种情况下，存储的采样数据可以表示信道信号的复电场。
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2.发明授权公开(公告)号：US07382984B2
公开(公告)日：2008-06-03
申请号：US10262944
申请日：2002-10-03
申请人： John McNicol , Kieran Parsons , Leo Strawczynski , Kim B. Roberts
发明人： John McNicol , Kieran Parsons , Leo Strawczynski , Kim B. Roberts
CPC分类号： H04B10/07951 , H04B10/07953 , H04B10/25137 , H04B10/505 , H04B10/50597 , H04B10/508 , H04B10/6161
摘要： Optical dispersion imposed on a communications signal conveyed through an optical communications system is compensated by modulating the communications signal in the electrical domain. A compensation function is determined that substantially mitigates the chromatic dispersion. The communications signal is then modulated in the electrical domain using the compensation function. Electrical domain compensation can be implemented in either the transmitter or the receiver end of the communications system. In preferred embodiments, compensation is implemented in the transmitter, using a look-up-table and digital-to-analog converter to generate an electrical predistorted signal. The electrical predistorted signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical communications system.
摘要翻译： 施加在通过光通信系统传送的通信信号上的光色散通过调制电域中的通信信号来补偿。 确定基本上减轻色散的补偿功能。 然后使用补偿功能在电域中调制通信信号。 可以在通信系统的发射机或接收机端实现电域补偿。 在优选实施例中，使用查找表和数模转换器来在发射机中实现补偿以产生电预失真信号。 然后，电预失真信号用于调制光源以产生用于通过光通信系统传输的相应的预失真光信号。
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3.发明授权公开(公告)号：US09559778B2
公开(公告)日：2017-01-31
申请号：US10531314
申请日：2003-07-11
IPC分类号： H04B10/516 , H04B10/50 , H04B10/2513 , H04B10/508
CPC分类号： H04B10/07951 , H04B10/07953 , H04B10/25137 , H04B10/505 , H04B10/50597 , H04B10/508 , H04B10/6161
摘要： Optical dispersion imposed on a communications signal conveyed through an optical communications system is compensated by modulating the communications signal in the electrical domain. A compensation function is determined that substantially mitigates the chromatic dispersion. The communications signal is then modulated in the electrical domain using the compensation function. In preferred embodiments, compensation is implemented in the transmitter, using a look-up-table and digital-to-analog converter to generate an electrical predistorted signal. The electrical predistorted signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical communications system.
摘要翻译： 施加在通过光通信系统传送的通信信号上的光色散通过调制电域中的通信信号来补偿。 确定基本上减轻色散的补偿功能。 然后使用补偿功能在电域中调制通信信号。 在优选实施例中，使用查找表和数模转换器来在发射机中实现补偿以产生电预失真信号。 然后，电预失真信号用于调制光源以产生用于通过光通信系统传输的相应的预失真光信号。
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4.发明授权公开(公告)号：US07382985B2
公开(公告)日：2008-06-03
申请号：US10307466
申请日：2002-12-02
申请人： Kim B. Roberts , Leo Strawczynski , Adrien Comeau , John McNicol , Maurice O'Sullivan , Kieran Parsons
发明人： Kim B. Roberts , Leo Strawczynski , Adrien Comeau , John McNicol , Maurice O'Sullivan , Kieran Parsons
CPC分类号： H04B10/25137 , H04B10/2572
摘要： Polarization Dependent Effects (PDEs), including Polarization Mode Dispersion (PMD) and Polarization Dependent Loss (PDL) imposed on optical signals conveyed through an optical link are compensated by processing an input signal in the electrical domain prior to transmission. A compensation function is derived that at least partially compensates the PDEs. The communications signal is then processed in the electrical domain using the compensation function to generate an electrical predistorted signal. The electrical predistorted signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical link. The PDEs of the optical link operate of the predistorted optical signal such at that substantially undistorted optical signal is received at a receiving end of the link.
摘要翻译： 通过在传输之前处理电域中的输入信号，来补偿施加在通过光链路传送的光信号上的极化相关效应（PDE），包括极化模式色散（PMD）和极化相关损耗（PDL）。 导出补偿功能，至少部分补偿PDE。 然后使用补偿功能在电域中处理通信信号以产生电预失真信号。 然后，电预失真信号用于调制光源以产生用于通过光链路传输的相应的预失真光信号。 光链路的PDE操作预失真的光信号，因为在链路的接收端处接收到基本上未失真的光信号。
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5.发明申请公开(公告)号：US20060078336A1
公开(公告)日：2006-04-13
申请号：US10531314
申请日：2003-07-11
IPC分类号： H04B10/12
CPC分类号： H04B10/07951 , H04B10/07953 , H04B10/25137 , H04B10/505 , H04B10/50597 , H04B10/508 , H04B10/6161
摘要： Optical dispersion imposed on a communications signal conveyed through an optical communications system is compensated by modulating the communications signal in the electrical domain. A compensation function is determined that substantially mitigates the chromatic dispersion. The communications signal is then modulated in the electrical domain using the compensation function. In preferred embodiments, compensation is implemented in the transmitter, using a look-up-table and digital-to-analog converter to generate an electrical predistorted signal. The electrical predistorted signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical communications system.
摘要翻译： 施加在通过光通信系统传送的通信信号上的光色散通过调制电域中的通信信号来补偿。 确定基本上减轻色散的补偿功能。 然后使用补偿功能在电域中调制通信信号。 在优选实施例中，使用查找表和数模转换器来在发射机中实现补偿以产生电预失真信号。 然后，电预失真信号用于调制光源以产生用于通过光通信系统传输的相应的预失真光信号。
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公开(公告)号：US07522841B2
公开(公告)日：2009-04-21
申请号：US11328199
申请日：2006-01-10
申请人： Chandra Bontu , Kuang Tsan Wu , John McNicol , Kim B. Roberts , Han Sun
发明人： Chandra Bontu , Kuang Tsan Wu , John McNicol , Kim B. Roberts , Han Sun
IPC分类号： H04B10/00
CPC分类号： H04J3/0608 , H04J14/06 , H04L7/027 , H04L7/0278 , H04L7/048
摘要： A method of a conveying data through an optical communications system. An optical signal is received through the optical communication system, the optical signal comprising data symbols and SYNC bursts, each SYNC burst having a predetermined symbol sequence. The received optical signal is oversampled to generate a multi-bit sample stream. The sample stream is partitioned into blocks of contiguous samples, wherein each block of samples partially overlaps at least one other block of samples and encompasses at least one SYNC burst and a plurality of data symbols. Each block of samples is independently processed to detect a value of each data symbol.
摘要翻译： 一种通过光通信系统传送数据的方法。 通过光通信系统接收光信号，光信号包括数据符号和SYNC脉冲串，每个SYNC脉冲串具有预定的符号序列。 所接收的光信号被过采样以产生多比特采样流。 样本流被划分为连续样本块，其中每个样本块与至少一个其他样本块部分重叠，并且包含至少一个SYNC突发和多个数据符号。 每个样本块被独立地处理以检测每个数据符号的值。
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7.发明授权公开(公告)号：US07672595B1
公开(公告)日：2010-03-02
申请号：US10742808
申请日：2003-12-23
申请人： John McNicol , Maurice O'Sullivan
发明人： John McNicol , Maurice O'Sullivan
IPC分类号： H04B10/12
CPC分类号： H04B10/25133
摘要： An optical communications system for conveying traffic through an optical link between transmitting and receiving nodes. The system comprises, for each node, respective legacy and bypass paths coupled in parallel between the optical link and the node. The legacy path of each node includes an optical dispersion compensation block for compensating a respective portion of dispersion of the link. Thus the present invention provides a system architecture by which an optical communications system can be constructed using conventional modulation and optical dispersion compensation technologies. Once installed, system growth can be accommodated using next generation transmitters (with electronic compensation) without stranding the legacy equipment. Legacy channels can also be upgraded to electronic compensation, as desired.
摘要翻译： 一种用于通过发送和接收节点之间的光链路传送业务的光通信系统。 对于每个节点，该系统包括在光链路和节点之间并行耦合的相应传统和旁路路径。 每个节点的遗留路径包括用于补偿链路的相应部分色散的光学色散补偿块。 因此，本发明提供了一种可以使用常规调制和光色散补偿技术构建光通信系统的系统架构。 一旦安装，可以使用下一代发射器（带电子补偿）来适应系统增长，而不会使传统设备绞合。 根据需要，旧版频道也可升级为电子补偿。
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公开(公告)号：US07292653B2
公开(公告)日：2007-11-06
申请号：US10796152
申请日：2004-03-10
申请人： Kuang Tsan Wu , Han Sun , John McNicol
发明人： Kuang Tsan Wu , Han Sun , John McNicol
CPC分类号： H04L27/3827 , H04L27/0014
摘要： A carrier lock detector for a QPSK or 4-QAM system implements a lock detection algorithm that maps detected signals onto one of first and second areas associated with nominal states defined by (I2⊕I3)·(Q2⊕Q3) and Q1⊕Q2·(I1 I2I3+ I1I2I3)+( I1⊕I2)·(Q1 Q2Q3+ Q1Q2Q3), or alternatively, by ( I1⊕I2· Q2⊕Q3)+( Q1⊕Q2· I2⊕I3), respectively. When detected signals map onto one of the first areas, a first signal is generated. When detected signals map onto one of the second areas, a second signal is generated. When a difference between the first and second signals exceeds a threshold, a carrier lock detection signal is generated to enable a decoder. The carrier lock detector is able to detect carrier lock at a raw BER of 1e-2 or greater at a very low signal-to-noise ratio.
摘要翻译： 用于QPSK或4-QAM系统的载波锁定检测器实现锁定检测算法，该检测算法将检测到的信号映射到与由（I 2>⊕I3）定义的标称状态相关联的第一和第二区域之一 （Q 2）⊕Q3 3）和O O Y LE =⊕⊕⊕⊕⊕⊕⊕⊕>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>⊕⊕⊕⊕⊕⊕ 2 （I <1>
I 2 Q <1> Q 3 3）或者替代地，由（ I <2> O =“SLELE”> Q <2> Q <1> 2 I SUB>）。 当检测到的信号映射到第一区域之一时，产生第一信号。 当检测到的信号映射到第二区域之一时，产生第二信号。 当第一和第二信号之间的差异超过阈值时，产生载波锁定检测信号以使能解码器。 载波锁定检测器能够以非常低的信噪比以1e-2或更大的原始BER检测载波锁定。 -
公开(公告)号：US5952945A
公开(公告)日：1999-09-14
申请号：US911191
申请日：1997-08-14
CPC分类号： H03M1/0641 , H03M1/66
摘要： Method and apparatus of converting between digital and analogue signal formats, wherein dither signals are combined with information signals to be converted, the dither signals being as a predetermined plurality of particular discrete frequencies that are outside desired information signal bandwidth and have orderly relation including to signal conversion sampling rate, which orderly relation aids looping of sequences of patterns in a related data stream having pattern-to-pattern transitions similar to within-pattern transitions. Specifically, discrete dither signal frequencies have integral relation with their minimum separation or spacing and with said sampling rate, the lowest frequency and the minimum frequency separation each being whole number divisors or submultiples of higher dither frequencies andor of the signal conversion rate.
摘要翻译： 在数字和模拟信号格式之间进行转换的方法和装置，其中抖动信号与要转换的信息信号组合，抖动信号作为预期的多个特定离散频率，其在期望的信息信号带宽之外并且具有包括信号的有序关系 转换采样率，其有序关系有助于在具有类似于模式间转换的模式到模式转换的相关数据流中循环模式序列。 具体来说，离散抖动信号频率与它们的最小间隔或间隔具有整体关系，并且所述采样率，最低频率和最小频率间隔各自是较高抖动频率的整数或除数或信号转换速率的整数。
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公开(公告)号：US20050201492A1
公开(公告)日：2005-09-15
申请号：US10796152
申请日：2004-03-10
申请人： Kuang Wu , Han Sun , John McNicol
发明人： Kuang Wu , Han Sun , John McNicol
IPC分类号： H04L27/22
CPC分类号： H04L27/3827 , H04L27/0014
摘要： A carrier lock detector for a QPSK or 4-QAM system implements, a lock detection algorithm that maps detected signals onto one of first and second areas associated with nominal states defined by (I2⊕I3)·(Q2⊕Q3) and {overscore (Q1⊕Q2)}·(I1{overscore (I2I3)}+{overscore (I1)}I2I3)+({overscore (I1⊕I2)})·(Q1{overscore (Q2Q3)}+{overscore (Q1)}Q2Q3), or alternatively, by ({overscore (I1⊕I2)}·{overscore (Q2⊕Q3)})+({overscore (Q1⊕Q2)}·{overscore (I2⊕I3)}), respectively. When detected signals map onto one of the first areas, a first signal is generated. When detected signals map onto one of the second areas, a second signal is generated. When a difference between the first and second signals exceeds a threshold, a carrier lock detection signal is generated to enable a decoder. The carrier lock detector is able to detect carrier lock at a raw BER of 1e-2 or greater at a very low signal-to-noise ratio.
摘要翻译： 用于QPSK或4-QAM系统的载波锁定检测器实现了一种锁定检测算法，该检测算法将检测到的信号映射到与由（I 2 / （Q 2）⊕Q3 3）和（超core SUB SUB SUB SUB⊕SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB SUB >）}。（I 1 {overscore（I 2 3 }} ）}（{overscore（I＆lt; 1＆lt; 1＆lt; 2＆gt; 2＆gt;}}）（ Q （过大的（Q 2）3 Q 3）} + {overscore（Q 1> 1 ）} Q “1”>“3”）}）。 当检测到的信号映射到第一区域之一时，产生第一信号。 当检测到的信号映射到第二区域之一时，产生第二信号。 当第一和第二信号之间的差异超过阈值时，产生载波锁定检测信号以使能解码器。 载波锁定检测器能够以非常低的信噪比以1e-2或更大的原始BER检测载波锁定。
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