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公开(公告)号：US09859984B2
公开(公告)日：2018-01-02
申请号：US15281986
申请日：2016-09-30
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.
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22.发明授权公开(公告)号：US08983309B2
公开(公告)日：2015-03-17
申请号：US13371846
申请日：2012-02-13
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。
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23.发明授权公开(公告)号：US08230294B2
公开(公告)日：2012-07-24
申请号：US12182575
申请日：2008-07-30
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。
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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
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。
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公开(公告)号：US20050002403A1
公开(公告)日：2005-01-06
申请号：US10609562
申请日：2003-07-01
申请人： Kim Roberts , James Harley , Philippe Neusy , Michael Mayer
发明人： Kim Roberts , James Harley , Philippe Neusy , Michael Mayer
CPC分类号： H04J3/076
摘要： In a method of estimating a bit rate (f1) of a digital signal conveyed through a SONET network between an originating node and a terminating node, the digital signal received by the originating node is processed to determine a result of a first function of the signal bit rate (f1) and a respective Tx local reference frequency (f2) of the originating node. A result of a second function of the Tx local reference frequency (f2) and a respective Rx local reference frequency (f3) of the terminating node is calculated. Finally, a result of a third function of the respective first and second function results is calculated, to derive an estimate of the signal bit rate (f4) relative to the Rx local reference frequency (f3).
摘要翻译： 在估计通过始发节点和终止节点之间的SONET网络传送的数字信号的比特率（f1）的方法中，处理由始发节点接收的数字信号以确定信号的第一功能的结果 比特率（f1）和相应的Tx本地参考频率（f2）。 计算终端节点的Tx本地参考频率（f2）和相应Rx本地参考频率（f3）的第二功能的结果。 最后，计算相应的第一和第二功能结果的第三功能的结果，以导出相对于Rx本地参考频率（f3）的信号比特率（f4）的估计。
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公开(公告)号：US11038549B1
公开(公告)日：2021-06-15
申请号：US16895203
申请日：2020-06-08
申请人： James Harley , Andrew D. Shiner
发明人： James Harley , Andrew D. Shiner
IPC分类号： H04B1/62 , H04B17/345 , H04B1/10 , H04B1/04 , H04B17/336
摘要： A receiver is configured to generate a digital signal representative of data conveyed by a communication signal detected at the receiver, and to apply digital signal processing to the digital signal, thereby generating a processed signal. The receiver is further configured to determine a relative noise estimate for the processed signal, and to load an amount of digital noise into the digital signal processing based on a difference between the relative noise estimate and a target. As a result of the digital noise loading, improved stability of at least one control loop in the receiver may be achieved.
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公开(公告)号：US07676161B2
公开(公告)日：2010-03-09
申请号：US11008515
申请日：2004-12-10
申请人： Kim Roberts , James Harley
发明人： Kim Roberts , James Harley
IPC分类号： H04B10/00
CPC分类号： H04B10/5053 , H04B10/505 , H04B10/5055 , H04B10/50572 , H04B10/50575 , H04B10/58
摘要： In a method of synthesizing an optical signal, a multi-bit digital representation of a desired optical E-field is generated. The multi-bit digital representation has a resolution of N1-bits, where N1 is an integer greater than 2. At least two analog drive signals are synthesized based on the multi-bit digital representation. Each analog drive signal exhibits excursions between 2M discrete states (i.e. has a resolution of M-bits), where M is an integer greater than 2. An electrical-to-optical (E/O) converter is driven using the analog drive signals to generate an output optical E-field at an output of the E/O converter. An error is detected between the output optical E-field and the desired complex E-field waveform, and at least one parameter adjusted so as to minimize the detected error.
摘要翻译： 在合成光信号的方法中，产生期望的光电场的多位数字表示。 多位数字表示具有N1位的分辨率，其中N1是大于2的整数。至少两个模拟驱动信号基于多位数字表示被合成。 每个模拟驱动信号表现出2M离散状态之间的偏移（即，具有M位的分辨率），其中M是大于2的整数。使用模拟驱动信号驱动电 - 光（E / O）转换器 在E / O转换器的输出端产生输出光电场。 在输出光电场和期望的复电场场波形之间检测到误差，并且调整至少一个参数以使检测到的误差最小化。
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28.发明授权Optical waveform for use in a DWDM optical network and systems for generating and processing same 有权用于DWDM光网络的光波形及其生成和处理系统公开(公告)号：US07321728B2
公开(公告)日：2008-01-22
申请号：US11281437
申请日：2005-11-18
申请人： James Harley , Lacra Pavel
发明人： James Harley , Lacra Pavel
IPC分类号： H04B10/08
CPC分类号： H04B10/07955 , H04B10/077 , H04J14/02 , H04J14/0298 , H04L5/02 , H04L27/10
摘要： An optical signal occupying one or more wavelengths. An optical data signal on each wavelength is modulated with a respective overhead (dither) signal, resulting in a respective dithered optical signal. The amplitude of a particular overhead signal used to modulate the corresponding optical data signal is chosen so that the RMS value of the overhead signal in the dithered optical signal is proportional to the average intensity of the optical data signal. The instantaneous frequency of each overhead signal is time-varying and each possible frequency belongs to a distinct set of frequencies which are all harmonically related to a fundamental frequency. The distinctness of each set of frequencies allows each overhead signal to be uniquely isolated from an aggregate overhead signal. The harmonic relationship among the frequencies allows improved accuracy of RMS detection at a receiver as well as reduced computational complexity, as each possible frequency for each overhead signal can be made to fall at the center of one of the frequency bins of a single FFT of reasonable size performed at a receiver. Methods and systems for generating and detecting such signals are disclosed.
摘要翻译： 占据一个或多个波长的光信号。 每个波长上的光学数据信号用相应的开销（抖动）信号进行调制，产生相应的抖动光信号。 选择用于调制对应的光数据信号的特定开销信号的振幅，使得抖动光信号中的开销信号的RMS值与光数据信号的平均强度成比例。 每个开销信号的瞬时频率是时变的，并且每个可能的频率属于与基频谐波相关的一组不同的频率。 每组频率的独特性允许每个开销信号与聚合开销信号唯一隔离。 频率之间的谐波关系允许提高接收机RMS检测的精度以及降低的计算复杂度，因为每个开销信号的每个可能的频率可以被置于合理的单个FFT的频率仓之一的中心 在接收机上执行的大小。 公开了用于产生和检测这些信号的方法和系统。
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公开(公告)号：US20060127102A1
公开(公告)日：2006-06-15
申请号：US11008515
申请日：2004-12-10
申请人： Kim Roberts , James Harley
发明人： Kim Roberts , James Harley
IPC分类号： H04B10/04
CPC分类号： H04B10/5053 , H04B10/505 , H04B10/5055 , H04B10/50572 , H04B10/50575 , H04B10/58
摘要： In a method of synthesizing an optical signal, a multi-bit digital representation of a desired optical E-field is generated. The multi-bit digital representation has a resolution of N1-bits, where N1 is an integer greater than 2. At least two analog drive signals are synthesized based on the multi-bit digital representation. Each analog drive signal exhibits excursions between 2M discrete states (i.e. has a resolution of M-bits), where M is an integer greater than 2. An electrical-to-optical (E/O) converter is driven using the analog drive signals to generate an output optical E-field at an output of the E/O converter. An error is detected between the output optical E-field and the desired complex E-field waveform, and at least one parameter adjusted so as to minimize the detected error.
摘要翻译： 在合成光信号的方法中，产生期望的光电场的多位数字表示。 多位数字表示具有N1位的分辨率，其中N1是大于2的整数。至少两个模拟驱动信号基于多位数字表示被合成。 每个模拟驱动信号表现出两个离散状态之间的偏移（即，具有M比特的分辨率），其中M是大于2的整数。电 - 光（E / O）转换器 使用模拟驱动信号驱动，以在E / O转换器的输出端产生输出光电场。 在输出光电场和期望的复电场场波形之间检测到误差，并且调整至少一个参数以使检测到的误差最小化。
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30.发明授权公开(公告)号：US06239889B1
公开(公告)日：2001-05-29
申请号：US08986027
申请日：1997-12-05
申请人： James Harley , Richard A. Habel
发明人： James Harley , Richard A. Habel
IPC分类号： H04B1000
CPC分类号： H04J14/02 , H04J14/0221
摘要： The power of an optical signal (s1) travelling on a channel (&lgr;1) of a WDM transmission system, is measured using a signature bit pattern (sBP1) which is inserted in the frame of the optical signal (s1). The power level of sBPL is adjusted at the launching point to a predetermined ratio (m) with the power of the optical signal. At a point of interest, the fiber is tapped and a fraction of the tapped signal, that includes a corresponding fraction of sBP1, is converted to an electrical signal. The fraction of sBP1 is extracted from a the electrical signal and power of sBPL is measured. This gives the optical power of s1 as (m) is known and also the calibration constant for the respective channel (&lgr;1) is known. The method can be applied for any and all channels of the WDM transmission system.
摘要翻译： 使用插入在光信号（s1）的帧中的签名位模式（sBP1）来测量在WDM传输系统的信道（lambd1）上行进的光信号（s1）的功率。 在发射点将sBPL的功率电平与光信号的功率调整到预定比率（m）。 在感兴趣的点上，光纤被抽头，并且包括相应部分sBP1的抽头信号的一部分被转换成电信号。 从电信号中提取sBP1的分数，并测量sBPL的功率。 这使得s1的光功率（m）是已知的，并且相应通道（lambd1）的校准常数是已知的。 该方法可以应用于WDM传输系统的任何和所有信道。
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