利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

309 条记录 (耗时 0.035 秒)

    OPTIMIZED NORMALIZED LEAST MEAN SQUARE PHASE ESTIMATION
    61.
    发明申请
    OPTIMIZED NORMALIZED LEAST MEAN SQUARE PHASE ESTIMATION 有权
    优化正规化最小均方相位估计

    公开(公告)号：US20120106983A1

    公开(公告)日：2012-05-03

    申请号：US12938738

    申请日：2010-11-03

    申请人： Lei Xu ,  Shaoling Zhang ,  Ting Wang

    发明人： Lei Xu ,  Shaoling Zhang ,  Ting Wang

    IPC分类号： H04B10/06 ,  H03D1/06

    CPC分类号： H04L27/223 ,  H04L1/0045 ,  H04L1/0057 ,  H04L27/2275 ,  H04L27/3836 ,  H04L2027/0055 ,  H04L2027/0067

    摘要： Methods and systems for normalized least mean square phase estimation are shown that include receiving optical transmissions that include a modulated signal, determining a step size based on a signal-to-noise ratio (SNR) and a laser linewidth that provides a balance between convergence speed and precision, estimating phase error using the determined step size, derotating the modulated signal to remove the estimated phase error, and demodulating the derotated signal to produce a bitstream.

    摘要翻译： 示出了用于归一化的最小均方相位估计的方法和系统，其包括接收包括调制信号的光传输，基于信噪比（SNR）确定步长，以及提供收敛速度之间的平衡的激光线宽 和精确度，使用所确定的步长估计相位误差，解调调制信号以去除估计的相位误差，以及解调解旋信号以产生比特流。

    Optical Frontend for Integration of Optical and Wireless Networks
    63.
    发明申请
    Optical Frontend for Integration of Optical and Wireless Networks 审中-公开
    用于光和无线网络集成的光学前端

    公开(公告)号：US20090285577A1

    公开(公告)日：2009-11-19

    申请号：US12119884

    申请日：2008-05-13

    申请人： Jianjun Yu ,  Philip Nan Ji ,  Lei Xu ,  Ting Wang

    发明人： Jianjun Yu ,  Philip Nan Ji ,  Lei Xu ,  Ting Wang

    IPC分类号： H04J14/02

    CPC分类号： H04J14/0298 ,  H04J14/02 ,  H04J14/0282 ,  H04J14/0286

    摘要： Data is transmitted by radio over fiber in a wavelength division multiplex optical transmission system. Data is transmitted over a single optical channel by directly modulating a single wavelength laser with a baseband data signal. Multiple single wavelength laser beams are multiplexed into a single multi-wavelength laser beam. All of the single optical channels are up-converted to RF frequencies by modulating the intensity of the multi-wavelength laser beam with an RF carrier.

    摘要翻译： 数据通过光纤通过波分复用光传输系统传输。 通过用基带数据信号直接调制单个波长激光器，通过单个光通道传输数据。 多个单波长激光束被复用成单个多波长激光束。 通过用RF载体调制多波长激光束的强度，所有单个光通道被上变频到RF频率。

    Inter-Symbol Interference-Suppressed Colorless DPSK Demodulation
    65.
    发明申请
    Inter-Symbol Interference-Suppressed Colorless DPSK Demodulation 审中-公开
    符号间干扰抑制无色DPSK解调

    公开(公告)号：US20080240736A1

    公开(公告)日：2008-10-02

    申请号：US11692432

    申请日：2007-03-28

    申请人： Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Shuji Murakami ,  Tsutomu Tajima ,  Yutaka Yano

    发明人： Philip Nan Ji ,  Lei Xu ,  Ting Wang ,  Shuji Murakami ,  Tsutomu Tajima ,  Yutaka Yano

    IPC分类号： H04B10/06

    CPC分类号： H04B10/677

    摘要： An optical device includes an interferometer for a received optical differential phase shift keying DPSK signal, and an equalizer integrated with the interferometer in a manner for reducing from optical filtering effects an interference by signal bits of the DPSK signal with signal bits of a contiguous DPSK signal. The interferometer is a Michelson delay interferometer type, but can also be a Mach-Zehnder delay interferometer type on fiber, waveguide or other optical structure. The equalizer is a Fabry-Perot type equalizer, but can be a ring resonator type or a fiber based equalizer.

    摘要翻译： 光学装置包括用于接收的光学差分相移键控DPSK信号的干涉仪，以及与干涉仪集成的均衡器，以减少光学滤波的方式，利用DPSK信号的信号位与相邻DPSK信号的信号位的干扰 。 干涉仪是迈克尔逊延迟干涉仪型号，但也可以是光纤，波导或其他光学结构上的马赫 - 曾德延迟干涉仪。 均衡器是法布里 - 珀罗型均衡器，但可以是环形谐振器型或基于光纤的均衡器。

    Optical Communication System and Method for Generating Dark Return-to-Zero and DWDM Optical MM-Wave Generation for ROF Downstream Link Using Optical Phase Modulator and Optical Interleaver
    66.
    发明申请
    Optical Communication System and Method for Generating Dark Return-to-Zero and DWDM Optical MM-Wave Generation for ROF Downstream Link Using Optical Phase Modulator and Optical Interleaver 失效
    用于通过光相位调制器和光交错器产生ROF下行链路的深度归零和DWDM光学MM波生成的光通信系统和方法

    公开(公告)号：US20070166054A1

    公开(公告)日：2007-07-19

    申请号：US11621765

    申请日：2007-01-10

    申请人： Jianjun Yu ,  Lei Xu ,  Philip Ji ,  Ting Wang

    发明人： Jianjun Yu ,  Lei Xu ,  Philip Ji ,  Ting Wang

    IPC分类号： H04B10/04

    CPC分类号： H04B10/508 ,  H04B10/2575 ,  H04B10/505 ,  H04J14/02 ,  H04J14/0256

    摘要： A method of generating a dark-RZ pulse in an optical communications system with a dual-arm modulator by setting a direct current bias on the modulator to a specific value such that an output optical power from the modulator achieves a maximum value when the RF signals on the first and second arms of the modulator are off and maintaining the direct current bias at the specific value and applying RF signals to the first and second arms of the modulator and delaying one of the RF signals applied to one of the first and second arms relative to the other of the RF signals such that a dark-RZ pulse is generated with a duty cycle based on the delay. Another aspect of the invention provides a method for generating dense wave division multiplexing (DWDM) optical mm-waves in an optical transmission system by phase modulated DWDM optical signal and applying the phase modulated DWDM optical signal to an input port of an optical interleaver, the optical interleaver having a specified bandwidth to suppress the optical carriers and convert the DWDM optical signal to DWDM optical mm-waves; and amplifying the DWDM optical mm-waves and transmitting the DWDM optical mm-waves over single mode fiber (SMF).

    摘要翻译： 一种在具有双臂调制器的光通信系统中通过将调制器上的直流偏置设置为特定值来产生暗RZ脉冲的方法，使得来自调制器的输出光功率在RF信号 在调制器的第一和第二臂处关闭并将直流偏压保持在特定值并且将RF信号施加到调制器的第一和第二臂并且延迟施加到第一和第二臂之一的RF信号之一 相对于RF信号中的另一个，使得以基于延迟的占空比产生暗RZ脉冲。 本发明的另一方面提供了一种通过相位调制DWDM光信号在光传输系统中产生密集波分复用（DWDM）光学毫米波的方法，并将相位调制的DWDM光信号应用于光交织器的输入端口， 具有指定带宽的光交错器以抑制光载波并将DWDM光信号转换为DWDM光学毫米波; 并放大DWDM光学毫米波，并通过单模光纤（SMF）传输DWDM光学毫米波。

    CARRIER AND SUBCARRIER HOPPING FOR OPTICAL OFDM SECURITY
    67.
    发明申请
    CARRIER AND SUBCARRIER HOPPING FOR OPTICAL OFDM SECURITY 有权
    携带器和散热器用于光学OFDM安全

    公开(公告)号：US20120321318A1

    公开(公告)日：2012-12-20

    申请号：US13478892

    申请日：2012-05-23

    申请人： Lei Xu ,  Dayou Qian ,  Ting Wang

    发明人： Lei Xu ,  Dayou Qian ,  Ting Wang

    IPC分类号： H04J14/00

    CPC分类号： H04L5/0012 ,  H04L5/0008 ,  H04L27/2642 ,  H04L27/2647

    摘要： Methods and systems for secure communication include assigning data streams to respective orthogonal sub-carriers according to random number information at a transmitter. The data streams are modulated onto the respective orthogonal sub-carriers before the orthogonal sub-carriers are transmitted. The random number information is transmitted on a second medium, separate from the transmission medium. The orthogonal sub-carriers are received from the transmission medium at a receiver, while the random number information is received from the second medium at the receiver. The orthogonal sub-carriers are associated with data streams using the random number information and demodulated to produce data for the associated data stream.

    摘要翻译： 用于安全通信的方法和系统包括根据发射机处的随机数信息将数据流分配给各个正交子载波。 在发送正交子载波之前，将数据流调制到各个正交子载波上。 在与传输介质分离的第二介质上发送随机数信息。 在接收机处从传输介质接收正交子载波，而在接收机处从第二媒体接收随机数信息。 正交子载波与使用随机数信息的数据流相关联并被解调以产生用于相关联的数据流的数据。

    Coherent Interleaved Polarization-Multiplexing Optical Communications with Single IQ Modulator
    68.
    发明申请
    Coherent Interleaved Polarization-Multiplexing Optical Communications with Single IQ Modulator 审中-公开
    具有单IQ调制器的相干交错极化复用光通信

    公开(公告)号：US20120321311A1

    公开(公告)日：2012-12-20

    申请号：US13523045

    申请日：2012-06-14

    申请人： Shaoliang Zhang ,  Fatih Yaman ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

    发明人： Shaoliang Zhang ,  Fatih Yaman ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

    IPC分类号： H04J14/06

    CPC分类号： H04B10/616 ,  H04B10/5051 ,  H04B10/532 ,  H04B10/5561 ,  H04J14/06

    摘要： An inventive method for coherent interleaved polarization-multiplexing PolMux optical communications with a single IQ modulator includes modulating a light source to generate a 50% return-to-zero RZ signal pulse at a frequency Rs, driving a single IQ modulator with inphase I and quadrature phase Q data at a bit rate of sais Rs to introduce phase modulation on said 50% RZ signal pulse to produce a QPSK pulse signal with all symbols being in a same polarization state without any time overlapping; and polarization modulating said QPSK signal to alternatively convert said QPSK signal into two orthogonal polarizations states enabling an interleaving PolMux signal with a symbol rate of Rs/2.

    摘要翻译： 用于具有单个IQ调制器的相干交错偏振复用PolMux光通信的创新方法包括调制光源以产生频率为Rs的50％归零RZ信号脉冲，以同相I和正交驱动单个IQ调制器 相位Q数据以sais的比特率在所述50％RZ信号脉冲上引入相位调制以产生QPSK脉冲信号，所有符号处于相同的极化状态，没有任何时间重叠; 以及对所述QPSK信号进行极化调制，以将所述QPSK信号交替地转换为使得能够以Rs / 2的符号率进行交织的PolMux信号的两个正交极化状态。

    Differential delay receiver using cross-polarization interferometer for PolMux-DPSK system
    69.
    发明授权
    Differential delay receiver using cross-polarization interferometer for PolMux-DPSK system 有权
    差分延迟接收机采用PolMux-DPSK系统的交叉偏振干涉仪

    公开(公告)号：US08090271B2

    公开(公告)日：2012-01-03

    申请号：US12236694

    申请日：2008-09-24

    申请人： Dayou Qian ,  Ting Wang ,  Lei Xu ,  Philip Nan Ji

    发明人： Dayou Qian ,  Ting Wang ,  Lei Xu ,  Philip Nan Ji

    IPC分类号： H04B10/06

    CPC分类号： H04J14/06

    摘要： 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.

    摘要翻译： 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的系数输出到偏振解复用器的训练信号接收器。

    High frequency optical millimeter-wave generation and wavelength reuse
    70.
    发明授权
    High frequency optical millimeter-wave generation and wavelength reuse 有权
    高频光学毫米波发生和波长重用

    公开(公告)号：US08064774B2

    公开(公告)日：2011-11-22

    申请号：US12117347

    申请日：2008-05-08

    申请人： Jianjun Yu ,  Dayou Qian ,  Lei Xu ,  Ting Wang

    发明人： Jianjun Yu ,  Dayou Qian ,  Lei Xu ,  Ting Wang

    IPC分类号： H04B10/00

    CPC分类号： H04B10/25758

    摘要： A method includes generating an optical millimeter wave signal for modulation of a first data signal, and deriving from the generated optical millimeter wave signal a subsequent light source for modulation of a second data signal. More specifically the generating includes modulating a light wave to a multiple of a frequency of an oscillating signal. Alternatively, the generating includes modulating a data signal mixed with an oscillating signal to a multiple of a frequency of the oscillating signal. The deriving includes modulating a frequency component filtered from a data modulation of the generated optical millimeter wave signal.

    摘要翻译： 一种方法包括产生用于调制第一数据信号的光学毫米波信号，以及从所生成的光学毫米波信号中导出用于调制第二数据信号的后续光源。 更具体地，生成包括将光波调制到振荡信号的频率的倍数。 或者，生成包括将与振荡信号混合的数据信号调制为振荡信号的频率的倍数。 导出包括调制从产生的光学毫米波信号的数据调制滤波的频率分量。