公开(公告)号：US08233797B2

公开(公告)日：2012-07-31

申请号：US12545159

申请日：2009-08-21

申请人： Dayou Qian ,  Neda Cvijetic ,  Junqiang Hu ,  Ting Wang

发明人： Dayou Qian ,  Neda Cvijetic ,  Junqiang Hu ,  Ting Wang

IPC分类号： H04B10/20 ,  H04J14/00

CPC分类号： H04J14/0282 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0298 ,  H04L25/0216

摘要： Methods and systems for processing communication signals in an Orthogonal Frequency Division Multiple Access (OFDMA)-Passive Optical Network (PON) are disclosed. An optical carrier at a wavelength generated at an optical line terminal (OLT) may be reused by optical network units (ONUs) in the network for upstream transmission of data signals to the OLT. In addition, each ONU may perform carrier suppression to avoid broadband beating noise resulting from the simultaneous transmission of upstream data signals on the same wavelength. Further, the optical source at the OLT used to generate the optical carrier may be reused as a local oscillator for coherent detection of received upstream signals to minimize any frequency offsets.

摘要翻译： 公开了在正交频分多址（OFDMA）无源光网络（PON）中处理通信信号的方法和系统。 在光线路终端（OLT）处生成的波长的光载波可以由网络中的光网络单元（ONU）重新使用，用于向OLT发送数据信号。 此外，每个ONU可以执行载波抑制以避免由于在相同波长上的上行数据信号的同时传输而导致的宽带打扰噪声。 此外，用于生成光载波的OLT处的光源可以重新用作本地振荡器，用于相干检测接收到的上行信号，以使任何频率偏移最小化。

公开(公告)号：US08184973B2

公开(公告)日：2012-05-22

申请号：US12371233

申请日：2009-02-13

申请人： Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

发明人： Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

IPC分类号： H04J14/06 ,  H04B10/158

CPC分类号： H04J14/06 ,  H04B10/61 ,  H04B10/676

摘要： There is provided a method for detecting optical signals comprising employing a photo diode to both directly detect a received optical signal and convert it into an electrical signal for recovery of data bit stream information in the received optical signal, the received optical signal being derived from a separation of two polarization multiplexed optical signals that were combined before being received.

摘要翻译： 提供了一种用于检测光信号的方法，包括采用光电二极管直接检测接收到的光信号并将其转换成用于恢复所接收的光信号中的数据位流信息的电信号，所接收的光信号从 在接收之前组合的两个偏振复用光信号的分离。

公开(公告)号：US08064775B2

公开(公告)日：2011-11-22

申请号：US12183368

申请日：2008-07-31

申请人： Jianjun Yu ,  Lei Xu ,  Philip Ji ,  Ting Wang ,  Dayou Qian ,  Yutaka Yano

发明人： Jianjun Yu ,  Lei Xu ,  Philip Ji ,  Ting Wang ,  Dayou Qian ,  Yutaka Yano

IPC分类号： H04B10/04 ,  H04B10/12

CPC分类号： H04B10/5165 ,  H04B10/54 ,  H04B10/548 ,  H04L27/2601

摘要： A method includes generating at least two lightwave carriers from a lightwave source, the carriers having a wavelength spacing, creating an up-subchannel and a down-subchannel orthogonal to one another and spaced apart based on the fixed wavelength spacing from modulations of the lightwave carriers according to respective up-converted OFDM signals that are carrier suppressed, and combining one lightwave from the up-subchannel and one lightwave from the down-subchannel into an optical channel for transmission over an optical fiber.

摘要翻译： 一种方法包括从光波源产生至少两个光波载波，所述载波具有波长间隔，产生基于与光波载波调制的固定波长间隔彼此正交并且间隔开的向上子信道和下信道 根据载波抑制的各自的上变换的OFDM信号，并将来自上信道的一个光波和来自下信道的一个光波组合成光信道以在光纤上传输。

公开(公告)号：US20110261867A1

公开(公告)日：2011-10-27

申请号：US12911416

申请日：2010-10-25

申请人： Junquiang Hu ,  Huy Dung Han ,  Dayou Qian

发明人： Junquiang Hu ,  Huy Dung Han ,  Dayou Qian

IPC分类号： H04B17/00

CPC分类号： H04L25/0305 ,  H04L25/0252 ,  H04L2025/03617

摘要： A digital receiver system to recover signals from inter-symbol-interference includes a finite impulse response (FIR) filter using convolution to recover signals; and a channel estimator coupled to the FIR filter to estimate FIR coefficients, wherein the channel estimator uses a second order expectation and a fourth order expectation from a convolution to calculate error function.

摘要翻译： 用于从符号间干扰恢复信号的数字接收机系统包括使用卷积恢复信号的有限脉冲响应（FIR）滤波器; 以及耦合到FIR滤波器以估计FIR系数的信道估计器，其中信道估计器使用来自卷积的二阶期望和四阶期望来计算误差函数。

公开(公告)号：US07978975B2

公开(公告)日：2011-07-12

申请号：US12184781

申请日：2008-08-01

申请人： Dayou Qian ,  Junqiang Hu ,  Philip Nan Ji ,  Ting Wang

发明人： Dayou Qian ,  Junqiang Hu ,  Philip Nan Ji ,  Ting Wang

IPC分类号： H04J14/00

CPC分类号： H04Q11/0067 ,  H04J14/0227 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0298 ,  H04L5/0007 ,  H04L5/0037 ,  H04Q2011/0086

摘要： Implementations of the present principles include methods, systems and apparatuses for transmitting data through a sub-carrier multiplexing and orthogonal frequency-division multiple access passive optical network. In accordance with aspects of the present principles, a plurality of optical network units are assigned electrical carrier frequency bandwidths that are narrower than a system capacity bandwidth. Modulation of optical waves transmitted between an optical line terminal and each optical network unit is conducted on different orthogonal sub-carrier frequencies within the assigned bandwidths such that sampling of said orthogonal sub-carrier frequencies is limited to the assigned electrical carrier frequency bandwidths. The waves are thereafter received and demodulated for the extraction of data.

摘要翻译： 本原理的实现包括通过副载波复用和正交频分多址无源光网络传输数据的方法，系统和装置。 根据本原理的方面，多个光网络单元分配比系统容量带宽窄的电载波频率带宽。 在光线路终端和每个光网络单元之间传输的光波的调制在所分配的带宽内的不同正交子载波频率上进行，使得所述正交子载波频率的采样被限制为所分配的电载波频率带宽。 之后接收和解调波以提取数据。

公开(公告)号：US20100215368A1

公开(公告)日：2010-08-26

申请号：US12545159

申请日：2009-08-21

申请人： Dayou Qian ,  Neda Cvijetic ,  Junqiang Hu ,  Ting Wang

发明人： Dayou Qian ,  Neda Cvijetic ,  Junqiang Hu ,  Ting Wang

IPC分类号： H04J14/00

CPC分类号： H04J14/0282 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0298 ,  H04L25/0216

摘要： Methods and systems for processing communication signals in an Orthogonal Frequency Division Multiple Access (OFDMA)-Passive Optical Network (PON) are disclosed. An optical carrier at a wavelength generated at an optical line terminal (OLT) may be reused by optical network units (ONUs) in the network for upstream transmission of data signals to the OLT. In addition, each ONU may perform carrier suppression to avoid broadband beating noise resulting from the simultaneous transmission of upstream data signals on the same wavelength. Further, the optical source at the OLT used to generate the optical carrier may be reused as a local oscillator for coherent detection of received upstream signals to minimize any frequency offsets.

摘要翻译： 公开了在正交频分多址（OFDMA）无源光网络（PON）中处理通信信号的方法和系统。 在光线路终端（OLT）处生成的波长的光载波可以由网络中的光网络单元（ONU）重新使用，用于向OLT发送数据信号。 此外，每个ONU可以执行载波抑制以避免由于在相同波长上的上行数据信号的同时传输而导致的宽带打扰噪声。 此外，用于生成光载波的OLT处的光源可以重新用作本地振荡器，用于相干检测接收到的上行信号，以使任何频率偏移最小化。

公开(公告)号：US20090202243A1

公开(公告)日：2009-08-13

申请号：US12371233

申请日：2009-02-13

申请人： Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

发明人： Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

IPC分类号： H04J14/06

CPC分类号： H04J14/06 ,  H04B10/61 ,  H04B10/676

摘要： There is provided a method for detecting optical signals comprising employing a photo diode to both directly detect a received optical signal and convert it into an electrical signal for recovery of data bit stream information in the received optical signal, the received optical signal being derived from a separation of two polarization multiplexed optical signals that were combined before being received.

摘要翻译： 提供了一种用于检测光信号的方法，包括采用光电二极管直接检测接收到的光信号并将其转换成用于恢复所接收的光信号中的数据位流信息的电信号，所接收的光信号从 在接收之前组合的两个偏振复用光信号的分离。

公开(公告)号：US08654439B2

公开(公告)日：2014-02-18

申请号：US13081707

申请日：2011-04-07

申请人： Dayou Qian ,  Ting Wang

发明人： Dayou Qian ,  Ting Wang

IPC分类号： H01S3/10

CPC分类号： H04B10/2543

摘要： Systems and methods are disclosed to process an optical signal using a pre-processor to populate a non-linearity compensation data structure based on a set of predetermined rules in a non-real-time off-line mode; and an amplifier applying said predetermined rules in real-time to one or more channel input data using the data structure to determine a non-linearity compensation output.

摘要翻译： 公开了系统和方法，以使用预处理器处理光信号，以基于非实时离线模式中的一组预定规则来填充非线性补偿数据结构; 以及使用所述数据结构将所述预定规则实时地应用于一个或多个信道输入数据以确定非线性补偿输出的放大器。

公开(公告)号：US08472813B2

公开(公告)日：2013-06-25

申请号：US12818154

申请日：2010-06-18

申请人： Neda Cvijetic ,  Narayan Prasad ,  Dayou Qian ,  Ting Wang

发明人： Neda Cvijetic ,  Narayan Prasad ,  Dayou Qian ,  Ting Wang

IPC分类号： H04B10/00 ,  H04B10/12

CPC分类号： H04L27/2646 ,  H04B10/548 ,  H04B10/614 ,  H04L25/03891 ,  H04L27/2626 ,  H04L27/2697

摘要： A polarization-multiplexed (POLMUX) optical orthogonal frequency division multiplexing (OFDM) system with direct detection includes an adaptive dual POLMUX carrier OFDM transmitter; and a block symmetric (B-S) MIMO equalizer coupled to the adaptive dual POLMUX carrier OFDM transmitter through a standard single-mode-fiber (SSMF) feedback path.

摘要翻译： 具有直接检测的偏振复用（POLMUX）光正交频分复用（OFDM）系统包括自适应双波分多址载波OFDM发射机; 以及通过标准单模光纤（SSMF）反馈路径耦合到自适应双POLMUX载波OFDM发射机的块对称（B-S）MIMO均衡器。

公开(公告)号：US20120213517A1

公开(公告)日：2012-08-23

申请号：US13311686

申请日：2011-12-06

申请人： Philip N. Ji ,  Dayou Qian ,  Ankitkumar N. Patel ,  Ting Wang ,  Yoshiaki Aono

发明人： Philip N. Ji ,  Dayou Qian ,  Ankitkumar N. Patel ,  Ting Wang ,  Yoshiaki Aono

IPC分类号： H04J14/02

CPC分类号： H04J14/0217 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0212 ,  H04J14/0256 ,  H04J14/0298 ,  H04L27/2697

摘要： Methods and systems for optical signal grooming that include providing one or more input signals, each having one or more modulated subcarriers, to a grooming processor; and grooming the input signals at a subcarrier level with the grooming processor to produce one or more output signals by arranging the modulated subcarriers in the output signals according to a grooming operation such that the modulated subcarriers are not demodulated or decoded prior to grooming.

摘要翻译： 用于光学信号整理的方法和系统，包括向梳理处理器提供每个具有一个或多个调制子载波的一个或多个输入信号; 以及通过梳理处理器在子载波电平下整理输入信号，以通过根据梳理操作将调制的子载波排列在输出信号中，以便在梳理之前不对调制的子载波进行解调或解码来产生一个或多个输出信号。