公开(公告)号：US08705956B2

公开(公告)日：2014-04-22

申请号：US13086724

申请日：2011-04-14

申请人： Mingzheng Cao ,  Dayou Qian

发明人： Mingzheng Cao ,  Dayou Qian

IPC分类号： H04B17/00 ,  H04K1/10 ,  H04B1/707 ,  H04L12/26

CPC分类号： H04L27/2659 ,  H04L27/266 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2692

摘要： 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.

摘要翻译： 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：US20110255864A1

公开(公告)日：2011-10-20

申请号：US13086724

申请日：2011-04-14

申请人： Mingzheng Cao ,  Dayou Qian

发明人： Mingzheng Cao ,  Dayou Qian

IPC分类号： H04B17/00

CPC分类号： H04L27/2659 ,  H04L27/266 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2692

摘要： 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.

摘要翻译： 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：US08718490B2

公开(公告)日：2014-05-06

申请号：US12183332

申请日：2008-07-31

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

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

IPC分类号： H04B10/61

CPC分类号： H04L27/2647 ,  H04B10/63

摘要： A method includes producing interference between a received optical OFDM signal and an optical carrier extracted from the received optical OFDM signal to provide optical coherent detection of the received optical OFDM signal. Preferably, producing the interference includes optically splitting the received optical OFDM signal into a first part that is filtered to extract the carrier from the received optical OFDM signal and a second part similar to the received optical OFDM signal.

摘要翻译： 一种方法包括：从所接收的光学OFDM信号中提取接收到的光OFDM信号与光载波之间产生干扰，以提供所接收的光OFDM信号的光相干检测。 优选地，产生干扰包括将所接收的光学OFDM信号光学分割成被滤波的第一部分，以从接收的光学OFDM信号中提取载波，以及类似于接收的光学OFDM信号的第二部分。

公开(公告)号：US08693890B2

公开(公告)日：2014-04-08

申请号：US13081693

申请日：2011-04-07

申请人： Dayou Qian ,  Ting Wang

发明人： Dayou Qian ,  Ting Wang

IPC分类号： H04B10/12 ,  H04B10/04

CPC分类号： H04B10/2543

摘要： 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.

摘要翻译： 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，并且调制 光信号具有补偿输出。

公开(公告)号：US20120301157A1

公开(公告)日：2012-11-29

申请号：US13267131

申请日：2011-10-06

申请人： Dayou Qian ,  Junqiang Hu ,  Ting Wang ,  Yoshiaki Aono ,  Tsutomu Tajima

发明人： Dayou Qian ,  Junqiang Hu ,  Ting Wang ,  Yoshiaki Aono ,  Tsutomu Tajima

IPC分类号： H04B10/06 ,  H04B10/04

CPC分类号： H04B10/25133

摘要： Methods and devices for compensating for chromatic dispersion are shown that include receiving an input data signal, applying a filter to the data signal, and outputting a CD compensated signal. Applying the filter includes convolving known filter coefficients with a plurality of delayed versions of the data signal using addition and at least one inverse sign operation or using lookup tables and combining outputs to produce a CD compensated signal.

摘要翻译： 示出了用于补偿色散的方法和装置，其包括接收输入数据信号，向数据信号施加滤波器，以及输出CD补偿信号。 应用滤波器包括使用加法和至少一个逆符号操作或使用查找表并组合输出以产生CD补偿信号的具有多个延迟版本的数据信号的已知滤波器系数。

公开(公告)号：US08098990B2

公开(公告)日：2012-01-17

申请号：US11832075

申请日：2007-08-01

申请人： Junqiang Hu ,  Ting Wang ,  Dayou Qian ,  Yuanqiu Luo ,  Yoshihiko Suemura ,  Makoto Shibutani

发明人： Junqiang Hu ,  Ting Wang ,  Dayou Qian ,  Yuanqiu Luo ,  Yoshihiko Suemura ,  Makoto Shibutani

IPC分类号： H04J14/00

CPC分类号： H04W88/085 ,  H04J14/021 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0298 ,  H04Q11/0067 ,  H04Q2011/0086

摘要： A network system and method include a wireless base station integrated at a central office of a service provider. The wireless base station is configured to provide portable and fixed services to customers. A passive optical network is coupled to the wireless base station at the central office to provide a link to extend an antenna for wireless operations of the wireless base station to a remote site such that a wireless signal from the wireless base station is transmitted in parallel with a passive fiber network signal through the link.

摘要翻译： 网络系统和方法包括集成在服务提供商的中心局的无线基站。 无线基站被配置为向客户提供便携和固定的服务。 无源光网络耦合到中心局的无线基站，以提供链路，以将无线基站的无线操作的天线扩展到远程站点，使得来自无线基站的无线信号与 无源光纤网络信号通过链路。

公开(公告)号：US20100329696A1

公开(公告)日：2010-12-30

申请号：US12562260

申请日：2009-09-18

申请人： Jianjun Yu ,  Ting Wang ,  Dayou Qian

发明人： Jianjun Yu ,  Ting Wang ,  Dayou Qian

IPC分类号： H04B10/04

CPC分类号： H04B10/5053 ,  H04B10/541

摘要： An optical transmitter including a dividing optical coupler for dividing a lightwave onto optical paths; a first optical modulator in a first of the optical paths and driven by an I component of a first signal and a I component of a second signal for modulating the lightwave, a DC bias of the first optical modulator being at a quadrature point; a second optical modulator in a second of the optical paths and driven by a Q component of the first signal and a Q component of the second signal for modulating the lightwave, a DC bias of the second optical modulator being at the quadrature point; a phase shifter for generating a 90 degree phase shift in the Q components of the first and second signals that are modulated by the second optical coupler; and a combining optical coupler for combining the modulated lightwave from the first optical coupler and the phase shifted Q components of the first and second signals for generating a quadrature amplitude modulated signal.

摘要翻译： 一种光发射机，包括用于将光波分解成光路的分光光耦合器; 在第一光路中的由第一信号的I分量和用于调制光波的第二信号的I分量驱动的第一光调制器，第一光调制器的DC偏置处于正交点; 在第二光路中的第二光调制器，由第一信号的Q分量和第二信号的Q分量驱动，用于调制光波，第二光调制器的DC偏置处于正交点; 移相器，用于产生由第二光耦合器调制的第一和第二信号的Q分量中的90度相移; 以及组合光耦合器，用于组合来自第一光耦合器的调制光波和用于产生正交幅度调制信号的第一和第二信号的相移Q分量。

公开(公告)号：US20100266282A1

公开(公告)日：2010-10-21

申请号：US12760813

申请日：2010-04-15

申请人： Yue-Kai Huang ,  Ting Wang ,  Dayou Qian ,  Robert Saperstein

发明人： Yue-Kai Huang ,  Ting Wang ,  Dayou Qian ,  Robert Saperstein

IPC分类号： H04J14/06 ,  H04L27/28

CPC分类号： H04L5/04 ,  H04B10/548 ,  H04B10/60 ,  H04J14/06 ,  H04L27/2697

摘要： A method includes modulating lightwaves to provide first and second OFDM signal sidebands at a first polarization direction and first and second OFDM signal sidebands at a second polarization direction, and combining sidebands that are oppositely positioned and joined from the first and second OFDM signal sidebands at each polarization direction to provide a polarization multiplexing OFDM signal.

摘要翻译： 一种方法包括调制光波以在第一偏振方向提供第一和第二OFDM信号边带，以及在第二极化方向上提供第一和第二OFDM信号边带，并且组合在每一个处与第一和第二OFDM信号边带相对地定位和连接的边带 偏振方向，以提供偏振复用OFDM信号。

公开(公告)号：US20120257897A1

公开(公告)日：2012-10-11

申请号：US13437139

申请日：2012-04-02

申请人： Junqiang Hu ,  Dayou Qian ,  Ting Wang

发明人： Junqiang Hu ,  Dayou Qian ,  Ting Wang

IPC分类号： H04J14/00

CPC分类号： H04B10/548 ,  H04B10/60 ,  H04L27/2697

摘要： An energy efficient OFDM transceiver includes a transmitter using a decision processor to control first internal elements that can be operated in parallel and can be selectively powered off or hibernated, and a receiver using a processing decision element to control second internal elements that can be operated in parallel and can be selectively powered off or hibernated, wherein control of the first and second internal elements enables tracking status of network traffic, adjustment of OFDM bandwidth based on a traffic decision and selectively powering off or hibernating parallel ones of the first and second internal elements.

摘要翻译： 节能OFDM收发器包括使用决策处理器来控制可以并行操作并且可以选择性地关闭或休眠的第一内部元件的发射机，以及使用处理决策元件来控制可以在 并联并且可以选择性地关闭或休眠，其中第一和第二内部元件的控制使得能够跟踪网络业务的状态，基于业务决策来调整OFDM带宽，并且选择性地关闭或休眠第一和第二内部元件中的并行 。

公开(公告)号：US08260156B2

公开(公告)日：2012-09-04

申请号：US12607166

申请日：2009-10-28

申请人： Dayou Qian ,  Ting Wang

发明人： Dayou Qian ,  Ting Wang

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

CPC分类号： H04J14/002 ,  H04B10/2513 ,  H04B10/60 ,  H04B10/6161 ,  H04B10/6162 ,  H04J14/06

摘要： 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).

摘要翻译： 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。