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    Single wavelength source-free OFDMA-PON communication systems and methods
    22.
    发明授权
    Single wavelength source-free OFDMA-PON communication systems and methods 有权
    单波长无源OFDMA-PON通信系统和方法

    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。

    Passive optical network system employing sub-carrier multiplexing and orthogonal frequency division multiple access modulation schemes
    23.
    发明授权
    Passive optical network system employing sub-carrier multiplexing and orthogonal frequency division multiple access modulation schemes 有权
    采用子载波复用和正交频分多址调制方案的无源光网络系统

    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。

    SINGLE WAVELENGTH SOURCE-FREE OFDMA-PON COMMUNICATION SYSTEMS AND METHODS
    24.
    发明申请
    SINGLE WAVELENGTH SOURCE-FREE OFDMA-PON COMMUNICATION SYSTEMS AND METHODS 有权
    单波长无源OFDMA-PON通信系统和方法

    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。

    Look-up table and digital transmitter based architecture for fiber nonlinearity compensation
    25.
    发明授权
    Look-up table and digital transmitter based architecture for fiber nonlinearity compensation 有权
    查找表和基于数字发射机的架构，用于光纤非线性补偿

    公开(公告)号：US08654439B2

    公开(公告)日：2014-02-18

    申请号：US13081707

    申请日：2011-04-07

    Applicant: Dayou Qian ,  Ting Wang

    Inventor： Dayou Qian ,  Ting Wang

    IPC: H01S3/10

    CPC classification number: H04B10/2543

    Abstract: 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.

    Abstract translation: 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。

    LOOK-UP TABLE AND DIGITAL TRANSMITTER BASED ARCHITECTURE FOR FIBER NONLINEARITY COMPENSATION
    29.
    发明申请
    LOOK-UP TABLE AND DIGITAL TRANSMITTER BASED ARCHITECTURE FOR FIBER NONLINEARITY COMPENSATION 有权
    用于光纤非线性补偿的查找表和基于数字发射机的架构

    公开(公告)号：US20120082468A1

    公开(公告)日：2012-04-05

    申请号：US13081693

    申请日：2011-04-07

    Applicant: Dayou Qian ,  Ting Wang

    Inventor： Dayou Qian ,  Ting Wang

    IPC: H04B10/04

    CPC classification number: H04B10/2543

    Abstract: Systems and methods are disclosed to process an optical signal with a pre-processing module to populate a non-linearity compensation look-up table based on a set of predetermined rules in a non-real-time off-line mode; and a transmitter applying said predetermined rules in real-time to multiple channel input data to generate a real-time symbol pattern, searching the look-up table with the real-time symbol pattern to determine a non-linearity compensation output, and modulating the optical signal with the compensation output.

    Abstract translation: 公开了系统和方法来处理具有预处理模块的光信号，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查找表; 以及发射机将所述预定规则实时地应用于多个信道输入数据以产生实时符号模式，用实时符号模式搜索查找表以确定非线性补偿输出，并调制 光信号具有补偿输出。

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