公开(公告)号：US08260156B2

公开(公告)日：2012-09-04

申请号：US12607166

申请日：2009-10-28

Applicant: Dayou Qian ,  Ting Wang

Inventor： Dayou Qian ,  Ting Wang

IPC: H04B10/06 ,  H04B10/12 ,  H04B10/00

CPC classification number: H04J14/002 ,  H04B10/2513 ,  H04B10/60 ,  H04B10/6161 ,  H04B10/6162 ,  H04J14/06

Abstract: A method for the polarization independent frequency domain equalization (FDE) on polarization multiplexing (POLMUX) coherent systems employing an adaptive crossing FDE which advantageously produces CD compensation, PMD compensation and PolDeMux within one functional block of a digital signal processor (DSP).

Abstract translation: 一种在偏振复用（POLMUX）相干系统上使用自适应交叉FDE的偏振无关频域均衡（FDE）的方法，其有利地在数字信号处理器（DSP）的一个功能块内产生CD补偿，PMD补偿和PolDeMux。

公开(公告)号：US08233797B2

公开(公告)日：2012-07-31

申请号：US12545159

申请日：2009-08-21

Applicant: Dayou Qian ,  Neda Cvijetic ,  Junqiang Hu ,  Ting Wang

Inventor： Dayou Qian ,  Neda Cvijetic ,  Junqiang Hu ,  Ting Wang

IPC: H04B10/20 ,  H04J14/00

CPC classification number: H04J14/0282 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0298 ,  H04L25/0216

Abstract: 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.

Abstract translation: 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

Applicant: Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

Inventor： Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

IPC: H04J14/06 ,  H04B10/158

CPC classification number: H04J14/06 ,  H04B10/61 ,  H04B10/676

Abstract: 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.

Abstract translation: 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

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

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

IPC: H04B10/04 ,  H04B10/12

CPC classification number: H04B10/5165 ,  H04B10/54 ,  H04B10/548 ,  H04L27/2601

Abstract: 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.

Abstract translation: 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

Applicant: Junquiang Hu ,  Huy Dung Han ,  Dayou Qian

Inventor： Junquiang Hu ,  Huy Dung Han ,  Dayou Qian

IPC: H04B17/00

CPC classification number: H04L25/0305 ,  H04L25/0252 ,  H04L2025/03617

Abstract: 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.

Abstract translation: 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：US20110255864A1

公开(公告)日：2011-10-20

申请号：US13086724

申请日：2011-04-14

Applicant: Mingzheng Cao ,  Dayou Qian

Inventor： Mingzheng Cao ,  Dayou Qian

IPC: H04B17/00

CPC classification number: H04L27/2659 ,  H04L27/266 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2692

Abstract: A system and method are provided for carrier frequency offset (CFO) estimation for coherent optical orthogonal-frequency-division-multiplexing (CO-OFDM) broadband systems. The method includes obtaining an initial estimate of a normalized CFO with an estimation range equal to ±L/2 subcarrier subspacing using a single training symbol with L identical portions. The method further includes obtaining a maximum likelihood (ML) estimate of the CFO by performing a local grid search based on the initial estimate.

Abstract translation: 提供了一种用于相干光正交频分复用（CO-OFDM）宽带系统的载波频偏（CFO）估计的系统和方法。 该方法包括使用具有L个相同部分的单个训练符号获得具有等于±L / 2子载波子空间的估计范围的归一化CFO的初始估计。 该方法还包括通过基于初始估计执行局部网格搜索来获得CFO的最大似然（ML）估计。

公开(公告)号：US07978975B2

公开(公告)日：2011-07-12

申请号：US12184781

申请日：2008-08-01

Applicant: Dayou Qian ,  Junqiang Hu ,  Philip Nan Ji ,  Ting Wang

Inventor： Dayou Qian ,  Junqiang Hu ,  Philip Nan Ji ,  Ting Wang

IPC: H04J14/00

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

Abstract: 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.

Abstract translation: 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

Applicant: Dayou Qian ,  Neda Cvijetic ,  Junqiang Hu ,  Ting Wang

Inventor： Dayou Qian ,  Neda Cvijetic ,  Junqiang Hu ,  Ting Wang

IPC: H04J14/00

CPC classification number: H04J14/0282 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0298 ,  H04L25/0216

Abstract: 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.

Abstract translation: 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：US20090274460A1

公开(公告)日：2009-11-05

申请号：US12236694

申请日：2008-09-24

Applicant: DAYOU QIAN ,  TING WANG ,  LEI XU ,  PHILIP NAN JI

Inventor： DAYOU QIAN ,  TING WANG ,  LEI XU ,  PHILIP NAN JI

IPC: H04J14/06

CPC classification number: H04J14/06

Abstract: A differential delay detection system and method includes an optical splitter to split an incoming optical signal between a first path and a second path. The first path includes a cross-polarization interferometer configured to separately generate polarization independent outputs using split paths and to generate cross-polarization interference outputs, and a polarization demultiplexer configured to combine the polarization independent outputs and the cross-polarization interference outputs from the cross-polarization interferometer with updated coefficients received from the second path to remove the cross-polarization mixed signals, The second path includes a training signal receiver configured to compute the updated coefficients and output the updated coefficients to the polarization demultiplexer.

Abstract translation: 差分延迟检测系统和方法包括：光分路器，用于在第一路径和第二路径之间分离输入光信号。 第一路径包括交叉偏振干涉仪，其被配置为使用分离路径分开产生偏振无关的输出并产生交叉极化干扰输出;以及偏振解复用器，被配置为组合来自交叉偏振干涉输出的偏振无关输出和交叉极化干扰输出， 偏振干涉仪，其具有从第二路径接收的更新的系数，以去除交叉极化混合信号。第二路径包括被配置为计算更新的系数并将更新后的系数输出到偏振解复用器的训练信号接收器。

公开(公告)号：US20090202243A1

公开(公告)日：2009-08-13

申请号：US12371233

申请日：2009-02-13

Applicant: Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

Inventor： Dayou Qian ,  Lei Xu ,  Junqiang Hu ,  Ting Wang

IPC: H04J14/06

CPC classification number: H04J14/06 ,  H04B10/61 ,  H04B10/676

Abstract: 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.

Abstract translation: 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。