专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08767575B2 Method and apparatus for broadband carrier frequency and phase recovery in coherent optical system 有权
标题翻译：相干光学系统中宽带载波频率和相位恢复的方法和装置
公开(公告)号：US08767575B2
公开(公告)日：2014-07-01
申请号：US13204290
申请日：2011-08-05
申请人： Zhuhong Zhang , Chuandong Li , Fei Zhu , Yusheng Bai
发明人： Zhuhong Zhang , Chuandong Li , Fei Zhu , Yusheng Bai
IPC分类号： G01R31/08 , H04B10/61 , H04L7/00 , H04L7/02 , H04L7/027 , H04L1/24 , H04L7/04 , H04L7/08 , H04L25/02 , H04L25/03 , H04W24/02
CPC分类号： H04B10/6165 , H04B10/611 , H04B10/613 , H04B10/6161 , H04B10/6164 , H04J14/0228 , H04L1/242 , H04L7/0054 , H04L7/02 , H04L7/027 , H04L7/04 , H04L7/041 , H04L7/08 , H04L25/0202 , H04L25/022 , H04L25/0222 , H04L25/03828 , H04W24/02
摘要： A digital apparatus comprising a fast Fourier transform (FFT) module configured to transform a time domain optical signal into a frequency domain optical signal, a circular shifter coupled to the FFT module and configured to provide coarse frequency offset compensation to the frequency domain optical signal based on an estimated frequency offset; and a frequency offset estimation module coupled to the circular shifter and configured to provide the estimated frequency offset based on a power spectrum of the frequency domain optical signal or a data block header autocorrelation of the time domain optical signal.
摘要翻译：一种数字装置，包括被配置为将时域光信号变换为频域光信号的快速傅里叶变换（FFT）模块，耦合到FFT模块并被配置为向基于频域光信号的粗频偏移补偿提供的圆形移位器估计频偏; 以及耦合到所述圆形移位器并且被配置为基于所述频域光信号的功率谱或所述时域光信号的数据块报头自相关来提供所估计的频率偏移的频率偏移估计模块。

2. 发明申请

US20120033965A1 Method and Apparatus for Broadband Carrier Frequency and Phase Recovery in Coherent Optical System 有权
标题翻译：相干光学系统中宽带载波频率和相位恢复的方法和装置
公开(公告)号：US20120033965A1
公开(公告)日：2012-02-09
申请号：US13204290
申请日：2011-08-05
申请人： Zhuhong Zhang , Chuandong Li , Fei Zhu , Yusheng Bai
发明人： Zhuhong Zhang , Chuandong Li , Fei Zhu , Yusheng Bai
IPC分类号： H04B10/06 , H04B10/08 , H04B10/00
CPC分类号： H04B10/6165 , H04B10/611 , H04B10/613 , H04B10/6161 , H04B10/6164 , H04J14/0228 , H04L1/242 , H04L7/0054 , H04L7/02 , H04L7/027 , H04L7/04 , H04L7/041 , H04L7/08 , H04L25/0202 , H04L25/022 , H04L25/0222 , H04L25/03828 , H04W24/02
摘要： A digital apparatus comprising a fast Fourier transform (FFT) module configured to transform a time domain optical signal into a frequency domain optical signal, a circular shifter coupled to the FFT module and configured to provide coarse frequency offset compensation to the frequency domain optical signal based on an estimated frequency offset; and a frequency offset estimation module coupled to the circular shifter and configured to provide the estimated frequency offset based on a power spectrum of the frequency domain optical signal or a data block header autocorrelation of the time domain optical signal.
摘要翻译：一种数字装置，包括被配置为将时域光信号变换为频域光信号的快速傅里叶变换（FFT）模块，耦合到FFT模块并被配置为向基于频域光信号提供粗频偏移补偿的圆形移位器估计频偏; 以及耦合到所述圆形移位器并且被配置为基于所述频域光信号的功率谱或所述时域光信号的数据块报头自相关来提供所估计的频率偏移的频率偏移估计模块。

3. 发明申请

US20110033184A1 Side Band Pilot Tone for Digital Signal Processing in Polarization Multiplexed Coherent Optical Communication System 有权
标题翻译：用于极化复用相干光通信系统中数字信号处理的边带导频
公开(公告)号：US20110033184A1
公开(公告)日：2011-02-10
申请号：US12847749
申请日：2010-07-30
申请人： Zhuhong Zhang , Chuandong Li , Fei Zhu , Yusheng Bai
发明人： Zhuhong Zhang , Chuandong Li , Fei Zhu , Yusheng Bai
IPC分类号： H04J14/06
CPC分类号： H04J14/06 , H04J14/002
摘要： A method comprising generating a plurality of first symbols that correspond to a side band pilot tone (SBPT) signal for a plurality of data streams, mapping the first symbols into a plurality of second symbols that correspond to a plurality of signal components of the polarization multiplexed (PM) optical signal, and transmitting the second symbols in a plurality of data blocks of a PM optical signal. An apparatus comprising at least one processor coupled to a memory and configured to obtain a data block that comprises a plurality of SBPTs in a received PM optical signal, estimate a set of values for a carrier frequency and a polarization state, update a tap weight of a master equalizer based on the estimated set of values, and update a plurality of slave equalizers based on the updated tap weight of the master equalizer.
摘要翻译：一种方法，包括生成对应于多个数据流的边带导频（SBPT）信号的多个第一符号，将第一符号映射成与偏振复用的多个信号分量相对应的多个第二符号（PM）光信号，并且在PM光信号的多个数据块中发送第二符号。一种装置，包括耦合到存储器并被配置为获得包含接收的PM光信号中的多个SBPT的数据块的至少一个处理器，估计载波频率和极化状态的一组值，更新一个基于估计的值集合的主均衡器，并且基于主均衡器的更新抽头权重来更新多个从均衡器。

4. 发明授权

US08340534B2 Side band pilot tone for digital signal processing in polarization multiplexed coherent optical communication system 有权
标题翻译：用于偏振复用相干光通信系统中数字信号处理的边带导频
公开(公告)号：US08340534B2
公开(公告)日：2012-12-25
申请号：US12847749
申请日：2010-07-30
申请人： Zhuhong Zhang , Chuandong Li , Fei Zhu , Yusheng Bai
发明人： Zhuhong Zhang , Chuandong Li , Fei Zhu , Yusheng Bai
IPC分类号： H04B10/06
CPC分类号： H04J14/06 , H04J14/002
摘要： A method comprising generating a plurality of first symbols that correspond to a side band pilot tone (SBPT) signal for a plurality of data streams, mapping the first symbols into a plurality of second symbols that correspond to a plurality of signal components of the polarization multiplexed (PM) optical signal, and transmitting the second symbols in a plurality of data blocks of a PM optical signal. An apparatus comprising at least one processor coupled to a memory and configured to obtain a data block that comprises a plurality of SBPTs in a received PM optical signal, estimate a set of values for a carrier frequency and a polarization state, update a tap weight of a master equalizer based on the estimated set of values, and update a plurality of slave equalizers based on the updated tap weight of the master equalizer.
摘要翻译：一种方法，包括生成对应于多个数据流的边带导频（SBPT）信号的多个第一符号，将第一符号映射成与偏振复用的多个信号分量相对应的多个第二符号（PM）光信号，并且在PM光信号的多个数据块中发送第二符号。一种装置，包括耦合到存储器并被配置为获得包含接收的PM光信号中的多个SBPT的数据块的至少一个处理器，估计载波频率和极化状态的一组值，更新一个基于估计的值集合的主均衡器，并且基于主均衡器的更新抽头权重来更新多个从均衡器。

5. 发明授权

US08391726B2 Method and apparatus for frame detection and polarization separation 有权
标题翻译：用于帧检测和偏振分离的方法和装置
公开(公告)号：US08391726B2
公开(公告)日：2013-03-05
申请号：US12712655
申请日：2010-02-25
申请人： Yuanjie Chen , Zhuhong Zhang , Chuandong Li , Fei Zhu , Yu Sheng Bai
发明人： Yuanjie Chen , Zhuhong Zhang , Chuandong Li , Fei Zhu , Yu Sheng Bai
IPC分类号： H04B10/06 , H04B10/00 , H04L27/28 , H04L12/66
CPC分类号： H04B10/60 , H04L25/03019 , H04L25/03159 , H04L2025/03426 , H04L2025/03445 , H04L2025/03522
摘要： An optical receiver comprising a frame detector configured to receive a polarized signal comprising a first bit stream and a second bit stream, and further configured to identify a plurality of frames in the first bit stream and the second bit stream using a composite header, and a time-domain equalizer (TDEQ) configured to separate the first bit stream and the second bit stream using a portion of the composite header.
摘要翻译：一种光接收机，包括帧检测器，其被配置为接收包括第一位流和第二位流的偏振信号，并且还被配置为使用复合报头来识别所述第一位流中的多个帧和所述第二位流，以及时域均衡器（TDEQ）被配置为使用复合报头的一部分来分离第一比特流和第二比特流。

6. 发明授权

US08737847B2 Method and apparatus of using joint timing recovery for a coherent optical system 有权
标题翻译：用于相干光学系统的联合定时恢复的方法和装置
公开(公告)号：US08737847B2
公开(公告)日：2014-05-27
申请号：US13423959
申请日：2012-03-19
申请人： Chuandong Li , Zhuhong Zhang , Fei Zhu , Yu Sheng Bai
发明人： Chuandong Li , Zhuhong Zhang , Fei Zhu , Yu Sheng Bai
IPC分类号： H04B10/06
CPC分类号： H04B10/6162
摘要： An apparatus and method for performing joint equalization and timing recovery in coherent optical systems. The method includes equalizing signals to generate compensated polarization signals, wherein timing error in a distorted optical signal is calculated based on one of the compensated polarization signals. The method further includes performing resampling polarization signals to correct timing offset in an optical signal based on the calculated timing error. The calculated timing error may also be used to adaptively control one or more operating parameters of an external device.
摘要翻译：用于在相干光学系统中执行联合均衡和定时恢复的装置和方法。该方法包括均衡信号以产生补偿的偏振信号，其中基于补偿的偏振信号中的一个来计算失真的光信号中的定时误差。该方法还包括基于所计算的定时误差来执行重采样偏振信号以校正光信号中的定时偏移。所计算的定时误差也可用于自适应地控制外部设备的一个或多个操作参数。

7. 发明授权

US08538279B2 Method and apparatus for carrier phase estimation and correction in a coherent optical system 有权
标题翻译：相干光学系统中载波相位估计和校正的方法和装置
公开(公告)号：US08538279B2
公开(公告)日：2013-09-17
申请号：US13179300
申请日：2011-07-08
申请人： Chuandong Li , Zhuhong Zhang , Fei Zhu , Yu Sheng Bai
发明人： Chuandong Li , Zhuhong Zhang , Fei Zhu , Yu Sheng Bai
IPC分类号： H04B10/00 , H04B10/06 , H04B10/66
CPC分类号： H04B10/66 , H04B10/50 , H04B10/61 , H04B10/611 , H04B10/6164 , H04B10/69 , H04J14/002 , H04J14/06 , H04L27/0014
摘要： An apparatus comprising a nonlinear lookup unit (NL-LUU) configured to add a phase shift to a signal sample to compensate for pattern dependent phase distortion, and one or more first phase adjustment units coupled to NL-LUU and configured to remove from the signal sample a nonlinear phase error from the NL-LUU, wherein the signal sample corresponds to a received signal polarization component of a polarization multiplexed (PM) coherent signal in a PM coherent optical system.
摘要翻译：一种包括非线性查找单元（NL-LUU）的设备，其被配置为将相移添加到信号样本以补偿基于模式的相位失真，以及耦合到NL-LUU并被配置为从信号中去除的一个或多个第一相位调整单元从NL-LUU采样非线性相位误差，其中信号样本对应于PM相干光学系统中偏振复用（PM）相干信号的接收信号偏振分量。

8. 发明申请

US20130183034A1 Method and Apparatus of Using Digital Equalizer for Cascaded Wavelength Selective Switch Compensation 有权
标题翻译：使用数字均衡器进行级联波长选择开关补偿的方法和装置
公开(公告)号：US20130183034A1
公开(公告)日：2013-07-18
申请号：US13348952
申请日：2012-01-12
申请人： Zhuhong Zhang , Yanming Li , Chuandong Li , Fei Zhu
发明人： Zhuhong Zhang , Yanming Li , Chuandong Li , Fei Zhu
IPC分类号： H04J14/00 , H04B15/00 , H04L27/01 , H04J14/02 , H04J14/06
CPC分类号： H04B10/614 , H04B10/532 , H04B10/556 , H04B10/613 , H04B10/616 , H04L25/03012 , H04L25/03159 , H04L2025/0342 , H04L2025/03541
摘要： An apparatus comprising a frequency-domain equalizer that has been iteratively generated to compensate for filtering effects of a wavelength selective switch, wherein the FDEQ is configured to process in a frequency domain digital samples of a polarization multiplexed phase-shift-keying signal that has been transported over an optical channel.
摘要翻译：一种包括频域均衡器的装置，其被迭代地产生以补偿波长选择开关的滤波效应，其中FDEQ被配置为在频域中处理已经经过的偏振复用相移键控信号的数字采样通过光通道传输。

9. 发明授权

US09025969B2 Method with improved phase robustness in coherent detected optical system 有权
标题翻译：相干检测光学系统相位鲁棒性提高的方法
公开(公告)号：US09025969B2
公开(公告)日：2015-05-05
申请号：US13480230
申请日：2012-05-24
申请人： Chuandong Li , Yuanjie Chen , Zhuhong Zhang , Yi Cai , Fei Zhu
发明人： Chuandong Li , Yuanjie Chen , Zhuhong Zhang , Yi Cai , Fei Zhu
IPC分类号： H04B10/06 , H04B10/61
CPC分类号： H04B10/613 , H04B10/6164
摘要： An optical signal receiver tracks local oscillator frequency offset (LOFO) and compensates for the phase distortion introduced in the received signals as a result of utilizing the local oscillator within a coherent detection scheme. This phase distortion is basically a constant phase rotation caused by the LOFO and implementation of the receiver using coherent detection and a digital interferometer instead of a conventional (yet complex) carrier phase estimation or recovery scheme. With an optical receiver implemented in this manner, the requirement of using a precise local oscillator laser with low frequency offset is less important.
摘要翻译：光信号接收器跟踪本地振荡器频率偏移（LOFO），并且通过在相干检测方案中利用本地振荡器来补偿在接收信号中引入的相位失真。该相位失真基本上是由LOFO引起的恒定相位旋转和使用相干检测的接收机的实现以及数字干涉仪而不是常规（但复杂的）载波相位估计或恢复方案。通过以这种方式实现的光接收机，使用具有低频偏移的精确本地振荡器激光器的要求不那么重要。

10. 发明授权

US08837957B2 Method and apparatus of using digital equalizer for cascaded wavelength selective switch compensation 有权
标题翻译：使用数字均衡器进行级联波长选择开关补偿的方法和装置
公开(公告)号：US08837957B2
公开(公告)日：2014-09-16
申请号：US13348952
申请日：2012-01-12
申请人： Zhuhong Zhang , Yanming Li , Chuandong Li , Fei Zhu
发明人： Zhuhong Zhang , Yanming Li , Chuandong Li , Fei Zhu
IPC分类号： H04B10/06
CPC分类号： H04B10/614 , H04B10/532 , H04B10/556 , H04B10/613 , H04B10/616 , H04L25/03012 , H04L25/03159 , H04L2025/0342 , H04L2025/03541
摘要： An apparatus comprising a frequency-domain equalizer that has been iteratively generated to compensate for filtering effects of a wavelength selective switch, wherein the FDEQ is configured to process in a frequency domain digital samples of a polarization multiplexed phase-shift-keying signal that has been transported over an optical channel.
摘要翻译：一种包括频域均衡器的装置，其被迭代地产生以补偿波长选择开关的滤波效应，其中FDEQ被配置为在频域中处理已经经过的偏振复用相移键控信号的数字采样通过光通道传输。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式