公开(公告)号：US20110291865A1

公开(公告)日：2011-12-01

申请号：US12791694

申请日：2010-06-01

申请人： Han Henry Sun ,  Kuang-Tsan Wu ,  Yuejian Wu ,  Sandy Thomson ,  John D. McNicol ,  David J. Krause

发明人： Han Henry Sun ,  Kuang-Tsan Wu ,  Yuejian Wu ,  Sandy Thomson ,  John D. McNicol ,  David J. Krause

IPC分类号： H03M7/00

CPC分类号： H03H17/0621 ,  H03H17/0685 ,  H03H2017/0298

摘要： A system, method, and apparatus is disclosed for interpolation of an output of an analog to digital converter (ADC) to enable operation of the ADC at a sampling rate that is independent of the sampling rate for a DSP core so as to efficiently enable operation at higher date rates. According to one of the embodiments, an interpolation circuit is coupled between the ADC and DSP core and receives a first plurality of samples of data at the first data rate from the ADC and supplies a plurality of samples of second data at a second data rate to the DSP core; the second data rate being less than the first data rate. According to one of the embodiments, the interpolation circuit includes a memory and a FIR filter circuit having filter tap coefficient values selected to provide attenuation at high frequencies to reduce aliasing noise.

摘要翻译： 公开了一种用于对模数转换器（ADC）的输出进行插值的系统，方法和装置，以使得能够以独立于DSP核的采样率的采样速率对ADC进行操作，以便有效地使能操作 以较高的日期率。 根据实施例之一，内插电路耦合在ADC和DSP内核之间，并从ADC接收第一数据速率的第一多个数据采样，并将第二数据的多个样本以第二数据速率提供给 DSP内核; 第二数据速率小于第一数据速率。 根据实施例中的一个，内插电路包括存储器和具有滤波器抽头系数值的FIR滤波器电路，该滤波器抽头系数值被选择以在高频率下提供衰减以减少混叠噪声。

公开(公告)号：US08477056B2

公开(公告)日：2013-07-02

申请号：US12791694

申请日：2010-06-01

申请人： Han Henry Sun ,  Kuang-Tsan Wu ,  Yuejian Wu ,  Sandy Thomson ,  John D. McNicol ,  David J. Krause

发明人： Han Henry Sun ,  Kuang-Tsan Wu ,  Yuejian Wu ,  Sandy Thomson ,  John D. McNicol ,  David J. Krause

IPC分类号： H03M1/12

CPC分类号： H03H17/0621 ,  H03H17/0685 ,  H03H2017/0298

摘要： A system, method, and apparatus is disclosed for interpolation of an output of an analog to digital converter (ADC) to enable operation of the ADC at a sampling rate that is independent of the sampling rate for a DSP core so as to efficiently enable operation at higher date rates. According to one of the embodiments, an interpolation circuit is coupled between the ADC and DSP core and receives a first plurality of samples of data at the first data rate from the ADC and supplies a plurality of samples of second data at a second data rate to the DSP core; the second data rate being less than the first data rate. According to one of the embodiments, the interpolation circuit includes a memory and a FIR filter circuit having filter tap coefficient values selected to provide attenuation at high frequencies to reduce aliasing noise.

摘要翻译： 公开了一种用于对模数转换器（ADC）的输出进行插值的系统，方法和装置，以使得能够以独立于DSP核的采样率的采样速率对ADC进行操作，以便有效地使能操作 以较高的日期率。 根据实施例之一，内插电路耦合在ADC和DSP内核之间，并从ADC接收第一数据速率的第一多个数据采样，并将第二数据的多个样本以第二数据速率提供给 DSP内核; 第二数据速率小于第一数据速率。 根据实施例中的一个，内插电路包括存储器和具有滤波器抽头系数值的FIR滤波器电路，该滤波器抽头系数值被选择以在高频率下提供衰减以减少混叠噪声。

公开(公告)号：US08335440B2

公开(公告)日：2012-12-18

申请号：US12791223

申请日：2010-06-01

申请人： David J. Krause ,  Han Henry Sun ,  John D. McNicol

发明人： David J. Krause ,  Han Henry Sun ,  John D. McNicol

IPC分类号： H04B10/06 ,  H04B10/148

CPC分类号： H04B10/616 ,  H04L25/0305 ,  H04L2025/03401 ,  H04L2025/03477 ,  H04L2025/03675

摘要： A system, method, and apparatus is disclosed for enabling a constant modulus algorithm (CMA) to be reliably used for blind equalization training of an equalizer. According to one embodiment, received signals in a binary phase shift keying (BPSK) format are converted to a quadrature phase shift keying (QPSK) format, to which CMA processing can be reliably applied for equalization. According to another aspect of this embodiment, the equalized QPSK signals are rotated to convert the signals to an equalized BPSK format for output.

摘要翻译： 公开了一种用于使恒模算法（CMA）可靠地用于均衡器的盲均衡训练的系统，方法和装置。 根据一个实施例，二进制相移键控（BPSK）格式的接收信号被转换成正交相移键控（QPSK）格式，CMA处理可以被可靠地应用于均衡。 根据本实施例的另一方面，均衡的QPSK信号被旋转以将信号转换成均衡的BPSK格式用于输出。

公开(公告)号：US20110293289A1

公开(公告)日：2011-12-01

申请号：US12791223

申请日：2010-06-01

申请人： David J. Krause ,  Han Henry Sun ,  John D. McNicol

发明人： David J. Krause ,  Han Henry Sun ,  John D. McNicol

IPC分类号： G06F17/10 ,  H04B10/00

CPC分类号： H04B10/616 ,  H04L25/0305 ,  H04L2025/03401 ,  H04L2025/03477 ,  H04L2025/03675

摘要： A system, method, and apparatus is disclosed for enabling a constant modulus algorithm (CMA) to be reliably used for blind equalization training of an equalizer. According to one embodiment, received signals in a binary phase shift keying (BPSK) format are converted to a quadrature phase shift keying (QPSK) format, to which CMA processing can be reliably applied for equalization. According to another aspect of this embodiment, the equalized QPSK signals are rotated to convert the signals to an equalized BPSK format for output.

摘要翻译： 公开了一种用于使恒模算法（CMA）可靠地用于均衡器的盲均衡训练的系统，方法和装置。 根据一个实施例，二进制相移键控（BPSK）格式的接收信号被转换成正交相移键控（QPSK）格式，CMA处理可以被可靠地应用于均衡。 根据本实施例的另一方面，均衡的QPSK信号被旋转以将信号转换成均衡的BPSK格式用于输出。

公开(公告)号：US20120251120A1

公开(公告)日：2012-10-04

申请号：US13078893

申请日：2011-04-01

申请人： John D. McNicol ,  Kuang-Tsan Wu ,  Han Henry Sun

发明人： John D. McNicol ,  Kuang-Tsan Wu ,  Han Henry Sun

IPC分类号： H04J14/02

CPC分类号： H04B10/506 ,  H04B10/5161 ,  H04B10/675 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0256 ,  H04J14/026 ,  H04J14/06

摘要： Consistent with the present disclosure, data, in digital form, is received by a transmit node of an optical communication system, and converted to an analog signal by a digital-to-analog converter (DAC) to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data forming a plurality of corresponding carriers. The carriers are modulated according to one of a plurality of modulation formats and then optically combined to form a superchannel of a constant maximum capacity, for example. Accordingly, the number of carriers and the bit rate for each carrier remain constant for each modulation format to realize a constant maximum capacity. The superchannel is then transmitted over an optical communication path to a receive node. At the receive node, the superchannel is optically demultiplexed from a plurality of other superchannels. The plurality of carriers of the superchannel are then supplied to a photodetector circuit, which receives additional light at one of the optical signal carrier wavelengths from a local oscillator laser. An analog-to-digital converter (ADC) is provided in the receive node to convert the electrical signals output from the photodetector into digital form. The output from the ADC is then filtered in the electrical domain, such that optical demultiplexing of the carriers is unnecessary.

摘要翻译： 与本公开一致，数字形式的数据由光通信系统的发射节点接收，并由数模转换器（DAC）转换为模拟信号以驱动调制器。 调制器又根据形成多个相应载波的接收数据调制多个波长中的一个波长的光。 载波根据多个调制格式之一进行调制，然后光学组合以形成例如恒定最大容量的超频道。 因此，每个载波的数量和每个载波的比特率对于每个调制格式保持不变，以实现恒定的最大容量。 然后，超信道通过光通信路径传输到接收节点。 在接收节点处，超级信道从多个其他超级信道被光解复用。 然后将超级通道的多个载体提供给光电检测器电路，光电检测器电路从本地振荡器激光器接收来自光信号载波波长的其中一个附加光。 在接收节点中提供模数转换器（ADC），以将从光电检测器输出的电信号转换为数字形式。 然后在电域中对ADC的输出进行滤波，使得载波的光解复用是不必要的。

公开(公告)号：US09900104B2

公开(公告)日：2018-02-20

申请号：US13078893

申请日：2011-04-01

申请人： John D. McNicol ,  Kuang-Tsan Wu ,  Han Henry Sun

发明人： John D. McNicol ,  Kuang-Tsan Wu ,  Han Henry Sun

IPC分类号： H04J14/02 ,  H04B10/50 ,  H04B10/67 ,  H04B10/516 ,  H04J14/06

CPC分类号： H04B10/506 ,  H04B10/5161 ,  H04B10/675 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0256 ,  H04J14/026 ,  H04J14/06

摘要： Consistent with the present disclosure, data, in digital form, is received by a transmit node of an optical communication system, and converted to an analog signal by a digital-to-analog converter (DAC) to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data forming a plurality of corresponding carriers. The carriers are modulated according to one of a plurality of modulation formats and then optically combined to form a superchannel of a constant maximum capacity, for example. Accordingly, the number of carriers and the bit rate for each carrier remain constant for each modulation format to realize a constant maximum capacity. The superchannel is then transmitted over an optical communication path to a receive node. At the receive node, the superchannel is optically demultiplexed from a plurality of other superchannels. The plurality of carriers of the superchannel are then supplied to a photodetector circuit, which receives additional light at one of the optical signal carrier wavelengths from a local oscillator laser. An analog-to-digital converter (ADC) is provided in the receive node to convert the electrical signals output from the photodetector into digital form. The output from the ADC is then filtered in the electrical domain, such that optical demultiplexing of the carriers is unnecessary.

公开(公告)号：US09485049B2

公开(公告)日：2016-11-01

申请号：US13853421

申请日：2013-03-29

申请人： John D. McNicol ,  Han H. Sun ,  David J. Krause

发明人： John D. McNicol ,  Han H. Sun ,  David J. Krause

IPC分类号： H04B10/079 ,  H04J14/02 ,  H04B10/04 ,  H04B10/077 ,  H04B10/50

CPC分类号： H04J14/0224 ,  H04B10/0775 ,  H04B10/506 ,  H04B2210/072 ,  H04J14/0273

摘要： An optical system may include optical transmitters to provide respective optical signals. Each of the respective optical signals may provide one or more carriers in an optical channel. The optical channel may include multiple carriers associated with the respective optical signals. First and second carriers, of the multiple carriers, may have a particular carrier space width. The particular carrier space width may include a frequency error associated with one or more optical signals of the respective optical signals. The optical system may include a control system to determine the frequency error and cause one or more of the optical transmitters to adjust the particular carrier space width based on the adjusted frequency error.

摘要翻译： 光学系统可以包括光发射器，以提供相应的光信号。 每个相应的光信号可以在光通道中提供一个或多个载波。 光信道可以包括与相应的光信号相关联的多个载波。 多载波的第一和第二载波可以具有特定载波空间宽度。 特定载波空间宽度可以包括与相应光信号的一个或多个光信号相关联的频率误差。 光学系统可以包括用于确定频率误差的控制系统，并且使得一个或多个光发射机基于调整的频率误差来调整特定载波空间宽度。

公开(公告)号：US20140328584A1

公开(公告)日：2014-11-06

申请号：US13851574

申请日：2013-03-27

申请人： Han H. Sun ,  John D. McNicol ,  Kuang-Tsan Wu

发明人： Han H. Sun ,  John D. McNicol ,  Kuang-Tsan Wu

IPC分类号： H04B10/61 ,  H04J14/02 ,  H04B10/079 ,  H04B10/58

CPC分类号： H04B10/6165 ,  H04B10/506 ,  H04B10/58 ,  H04J14/02

摘要： An optical transmitter may include an optical source to provide a first optical signal having a varying frequency; an optical circuit to receive a portion of the first optical signal and provide a second optical signal corresponding to a change in frequency of the first optical signal; a photodetector to receive the first optical signal and provide an electrical signal that is indicative of the change in frequency of the first optical signal; an integrator to receive the electrical signal and provide an inverted electrical signal; and a controller to process the inverted electrical signal and provide a current, associated with the inverted electrical signal, to the optical source. The optical source may reduce the phase noise associated with the first optical signal based on the current.

摘要翻译： 光发射机可以包括光源以提供具有变化频率的第一光信号; 光电路，用于接收所述第一光信号的一部分，并提供对应于所述第一光信号的频率变化的第二光信号; 光电检测器，用于接收第一光信号并提供指示第一光信号的频率变化的电信号; 积分器，用于接收电信号并提供反相电信号; 以及控制器，用于处理所述反相电信号并将与所述反相电信号相关联的电流提供给所述光源。 光源可以基于电流减小与第一光信号相关联的相位噪声。

公开(公告)号：US08768177B2

公开(公告)日：2014-07-01

申请号：US12897784

申请日：2010-10-05

申请人： Kuang-Tsan Wu ,  John D. McNicol ,  David F. Welch ,  Stephen G. Grubb ,  Pierre Mertz

发明人： Kuang-Tsan Wu ,  John D. McNicol ,  David F. Welch ,  Stephen G. Grubb ,  Pierre Mertz

IPC分类号： H04B10/58

CPC分类号： H04J14/06 ,  H04J14/026 ,  H04L1/007

摘要： Consistent with the present disclosure, data, in digital form, is received by a transmit nodes of an optical communication, and converted to analog signal by a digital-to-analog converter (DAC) to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data. The modulated light is then transmitted over an optical communication path to a receive node. At the receive node, the modulated optical signal, as well as other modulated optical signals are supplied to a photodetector circuit, which receives additional light at one of the optical signal wavelengths from a local oscillator laser. An analog-to-digital converter (ADC) is provided in the receive node to convert the electrical signals output from the photodetector into digital form. The output from the ADC is then filtered in the electrical domain, such that optical demultiplexing of individual channels is unnecessary.

摘要翻译： 与本公开一致，数字形式的数据由光通信的发射节点接收，并由数模转换器（DAC）转换为模拟信号以驱动调制器。 调制器又根据接收的数据调制多个波长中的一个波长的光。 然后将调制的光通过光通信路径传输到接收节点。 在接收节点处，调制的光信号以及其它调制的光信号被提供给光电检测器电路，光电检测器电路从本地振荡器激光器接收来自光信号波长之一的附加光。 在接收节点中提供模数转换器（ADC），以将从光电检测器输出的电信号转换为数字形式。 然后在电域中对来自ADC的输出进行滤波，使得各个信道的光解复用是不必要的。

公开(公告)号：US20120251119A1

公开(公告)日：2012-10-04

申请号：US13078888

申请日：2011-04-01

申请人： John D. McNicol ,  Matthew L. Mitchell ,  David F. Welch

发明人： John D. McNicol ,  Matthew L. Mitchell ,  David F. Welch

IPC分类号： H04J14/02

CPC分类号： H04J14/02 ,  H04J14/0256 ,  H04J14/026 ,  H04J14/06

摘要： Consistent with the present disclosure, data, in digital form, is received by a transmit node of an optical communication, and converted to analog signal by a digital-to-analog converter (DAC) to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data forming a plurality of corresponding carriers. The plurality of carriers are then optically combined with a fixed spacing combiner to form a superchannel of a fixed capacity. Accordingly, the number of carriers are selected according to a modulation format and symbol rate to realize the fixed capacity, for example. The superchannel is then transmitted over an optical communication path to a receive node. At the receive node, the superchannel is optically demultiplexed from a plurality of other superchannels. The plurality of carriers are then supplied to a photodetector circuit, which receives additional light at one of the optical signal carrier wavelengths from a local oscillator laser. An analog-to-digital converter (ADC) is provided in the receive node to convert the electrical signals output from the photodetector into digital form. The output from the ADC is then filtered in the electrical domain, such that optical demultiplexing of the carriers is unnecessary.

摘要翻译： 根据本公开，数字形式的数据由光通信的发送节点接收，并由数模转换器（DAC）转换成模拟信号以驱动调制器。 调制器又根据形成多个相应载波的接收数据调制多个波长中的一个波长的光。 然后将多个载波与固定间隔组合器光学组合以形成固定容量的超级通道。 因此，例如，根据调制格式和符号率来选择载波的数量以实现固定容量。 然后，超信道通过光通信路径传输到接收节点。 在接收节点处，超级信道从多个其他超级信道被光解复用。 然后将多个载波提供给光电检测器电路，该电路从本地振荡器激光器接收来自光信号载波波长的其中一个附加光。 在接收节点中提供模数转换器（ADC），以将从光电检测器输出的电信号转换为数字形式。 然后在电域中对ADC的输出进行滤波，使得载波的光解复用是不必要的。