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1. 发明授权

US08731413B1 DAC-based optical modulator and demodulator 有权
标题翻译：基于DAC的光调制器和解调器
公开(公告)号：US08731413B1
公开(公告)日：2014-05-20
申请号：US13356167
申请日：2012-01-23
申请人： Sameep Dave , Matthew Nimon , Fan Mo , William Thesling
发明人： Sameep Dave , Matthew Nimon , Fan Mo , William Thesling
IPC分类号： H04B10/00
CPC分类号： H04B10/25137 , H04B10/2507 , H04B10/516 , H04B10/60 , H04B10/6971 , H04L7/0075 , H04L25/03834
摘要： Methods, systems, and devices are described for modulating and demodulating data on optical signals. During modulation, at least one stream of symbol mapped bits is filtered with at least one pulse shaping filter to reduce a bandwidth of the stream of bits and to pre-compensate for at least one identified non-ideal transmission condition. The filtered bits are modulated onto a waveform in the digital domain, and the modulated filtered bits are transmitted to digital-to-analog converter. The output of the digital-to-analog converter is converted to an optical signal. During demodulation, a received optical signal is sampled at a first sampling rate at an ADC, downsampled to a lower sampling rate for filtering, filtered with at least one discrete pulse-shaping filter, upsampled for equalization and demodulation, and then equalized and demodulated.
摘要翻译：描述了用于调制和解调光信号数据的方法，系统和装置。在调制期间，利用至少一个脉冲整形滤波器对符号映射比特的至少一个流进行滤波，以减少比特流的带宽并对至少一个识别的非理想传输条件进行预补偿。滤波后的位被调制到数字域中的波形上，调制滤波后的位被传送到数模转换器。数/模转换器的输出转换为光信号。在解调期间，接收到的光信号以ADC的第一采样率进行采样，下采样到较低的采样率进行滤波，用至少一个离散脉冲整形滤波器滤波，对采样进行均衡和解调，然后进行均衡和解调。

2. 发明授权

US08693897B2 Digital demodulator architecture 有权
标题翻译：数字解调器架构
公开(公告)号：US08693897B2
公开(公告)日：2014-04-08
申请号：US13205431
申请日：2011-08-08
申请人： Fan Mo , William Thesling , Matthew Nimon , Sameep Dave
发明人： Fan Mo , William Thesling , Matthew Nimon , Sameep Dave
IPC分类号： H04B10/06
CPC分类号： H04L7/0075 , H04B10/079 , H04B10/2513 , H04B10/2569 , H04B10/697 , H04J14/02 , H04L27/2096 , H04L27/22 , H04L27/223
摘要： Methods, systems, and devices are described for a digital demodulator device for processing received optical signals. The device may include a quadrature error filter that receives a digitized version of an optical signal, and removes quadrature errors to generate a filtered series of data samples. The device may also include a frequency offset removal module for performing frequency rotation on the filtered series of data samples. The device may include a chromatic dispersion compensation module which removes chromatic dispersion from horizontal and vertical polarization channels. The device may include a polarization mode dispersion (PMD)/polarization dependent loss (PDL) compensation module which compensates for interference caused by PMD and PDL. The device may also include a phase recovery module configured to track and correct phase.
摘要翻译：描述了用于处理接收的光信号的数字解调器装置的方法，系统和装置。该装置可以包括接收光信号的数字化版本的正交误差滤波器，并且去除正交误差以产生滤波后的一系列数据采样。该装置还可以包括用于对经过滤波的一系列数据采样进行频率旋转的频偏移除模块。该装置可以包括从水平和垂直极化通道去除色散的色散补偿模块。该装置可以包括补偿由PMD和PDL引起的干扰的偏振模色散（PMD）/偏振相关损耗（PDL）补偿模块。该装置还可以包括配置为跟踪和校正相位的相位恢复模块。

3. 发明授权

US08639126B1 Coarse frequency offset estimation and correction for high-speed optical communications 有权
标题翻译：用于高速光通信的粗频偏估计和校正
公开(公告)号：US08639126B1
公开(公告)日：2014-01-28
申请号：US13356159
申请日：2012-01-23
申请人： Matthew Nimon , Fan Mo , William Thesling , Sameep Dave
发明人： Matthew Nimon , Fan Mo , William Thesling , Sameep Dave
IPC分类号： H04B10/00
CPC分类号： H04B10/6165 , H04B10/2569 , H04B10/613 , H04B10/6166 , H04B10/6971 , H04L25/03057
摘要： Methods, systems, and devices are described for compensating for a coarse frequency offset between a received optical signal and a local oscillator at a demodulator. Multiple samples are received of an output of a discrete Fourier transform performed on the received optical signal. A magnitude of each sample is determined, and the determined magnitudes may be filtered by a digital domain filter. A difference is computed between the determined magnitudes for a first set of the samples and the determined magnitudes for a second set of the samples, and a local oscillator correction factor is generated based on at least the computed difference.
摘要翻译：描述了用于在解调器处补偿接收的光信号和本地振荡器之间的粗略频率偏移的方法，系统和装置。接收对接收到的光信号执行的离散傅立叶变换的输出的多个样本。确定每个样本的幅度，并且可以用数字域滤波器对确定的幅度进行滤波。在第一组样本的确定幅度和第二组样本的确定幅度之间计算差值，并且至少基于所计算的差异产生本地振荡器校正因子。

4. 发明申请

US20120189318A1 DIGITAL DEMODULATOR ARCHITECTURE 有权
标题翻译：数字解调器架构
公开(公告)号：US20120189318A1
公开(公告)日：2012-07-26
申请号：US13205431
申请日：2011-08-08
申请人： Fan Mo , William Thesling , Matthew Nimon , Sameep Dave
发明人： Fan Mo , William Thesling , Matthew Nimon , Sameep Dave
IPC分类号： H04B10/00
CPC分类号： H04L7/0075 , H04B10/079 , H04B10/2513 , H04B10/2569 , H04B10/697 , H04J14/02 , H04L27/2096 , H04L27/22 , H04L27/223
摘要： Methods, systems, and devices are described for a digital demodulator device for processing received optical signals. The device may include a quadrature error filter that receives a digitized version of an optical signal, and removes quadrature errors to generate a filtered series of data samples. The device may also include a frequency offset removal module for performing frequency rotation on the filtered series of data samples. The device may include a chromatic dispersion compensation module which removes chromatic dispersion from horizontal and vertical polarization channels. The device may include a polarization mode dispersion (PMD)/polarization dependent loss (PDL) compensation module which compensates for interference caused by PMD and PDL. The device may also include a phase recovery module configured to track and correct phase.
摘要翻译：描述了用于处理接收的光信号的数字解调器装置的方法，系统和装置。该装置可以包括接收光信号的数字化版本的正交误差滤波器，并且去除正交误差以产生滤波后的一系列数据采样。该装置还可以包括用于对经过滤波的一系列数据采样进行频率旋转的频偏移除模块。该装置可以包括从水平和垂直极化通道去除色散的色散补偿模块。该装置可以包括补偿由PMD和PDL引起的干扰的偏振模色散（PMD）/偏振相关损耗（PDL）补偿模块。该装置还可以包括配置为跟踪和校正相位的相位恢复模块。

5. 发明授权

US08682180B1 Interpolator for high-rate optical communications 有权
标题翻译：高速光通讯插件
公开(公告)号：US08682180B1
公开(公告)日：2014-03-25
申请号：US13356177
申请日：2012-01-23
申请人： Matthew Nimon , Fan Mo , William Thesling
发明人： Matthew Nimon , Fan Mo , William Thesling
IPC分类号： H04B10/00
CPC分类号： H04B10/6165 , H04B10/2569 , H04B10/613 , H04B10/6166 , H04B10/6971 , H04L25/03057
摘要： Methods, systems, and devices are described for a low complexity interpolator for use in optical transmission systems. An input receives a digitized version of an optical signal, and provides samples of the received signal to a filter module. The filter module filters the input samples according to a set of filter coefficients provided by a memory. The set of filter coefficients are provided based on the output of a numerically controlled oscillator that provides an output corresponding to an accumulation of partial periods of the first sample rate. Filtered data samples are output to a sample block assembler that receives the data samples, removes filtered data samples where it is indicated that the sample is not valid, and outputs valid filtered data samples at the second sample rate and at a fixed number of samples power output period.
摘要翻译：对于用于光传输系统的低复杂度内插器描述了方法，系统和设备。输入接收光信号的数字化版本，并将接收信号的样本提供给滤波器模块。滤波器模块根据存储器提供的一组滤波器系数对输入样本进行滤波。基于数字控制振荡器的输出提供滤波器系数的集合，其提供与第一采样率的部分周期的累积相对应的输出。过滤的数据样本被输出到接收数据样本的样本块汇编器，去除其中指示样本无效的滤波数据样本，并以第二采样率和固定数量的采样功率输出有效的滤波数据样本输出期。

6. 发明申请

US20070208884A1 DYNAMIC LINK ASSIGNMENT IN A COMMUNICATION SYSTEM 有权
标题翻译：通信系统中的动态链路分配
公开(公告)号：US20070208884A1
公开(公告)日：2007-09-06
申请号：US11744450
申请日：2007-05-04
申请人： Mark Vanderaar , Matthew Nimon , William Thesling
发明人： Mark Vanderaar , Matthew Nimon , William Thesling
IPC分类号： G06F3/00
CPC分类号： H04L5/0007 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L1/0026 , H04L5/003 , H04L5/0048 , H04L5/0053 , H04L27/2601 , H04L27/2602 , H04L27/2657 , H04L2001/0093
摘要： An architecture for the dynamic assignment of links in a multi-user communication system. A plurality of information channels are provided in a forward communication link of the communication system for carrying channel information of the plurality of information channels from a transmitter to a plurality of corresponding receiving devices. The channel information in corresponding select ones of the plurality of information channels is varied dynamically in response to link conditions of the associated receiving devices to more efficiently utilize the channel bandwidth.
摘要翻译：用于在多用户通信系统中动态分配链路的架构。在通信系统的前向通信链路中提供多个信息信道，用于将多个信息信道的信道信息从发射机传送到多个对应的接收设备。响应于相关联的接收设备的链路状态，多个信道中的相应选择信道中的信道信息被动态变化，以更有效地利用信道带宽。

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