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    • 62. 发明授权
    • Optical transmission/reception system, optical transmitter, optical receiver, and optical transmission/reception method
    • 光传输/接收系统,光发射机,光接收机,光传输/接收方式
    • US08942569B2
    • 2015-01-27
    • US12581413
    • 2009-10-19
    • Takahito TanimuraTakeshi HoshidaHisao Nakashima
    • Takahito TanimuraTakeshi HoshidaHisao Nakashima
    • H04B10/00H04J14/06H04B10/54H04B10/50H04B10/532H04B10/60
    • H04B10/541H04B10/5055H04B10/532H04B10/60H04B2210/254
    • An optical transmission/reception system includes a modulator for modulating light based on data to output signal light; a transmission-side signal processor performing transmission-side digital signal processing which imparts a polarization change to the signal light by the optical modulation with respect to an input signal; an optical transmitter in which the modulator performs the optical modulation based on the input signal subjected to the transmission-side digital signal processing in the transmission-side signal processor; and an optical receiver including a converter converting the signal light inputted from the optical transmitter via a transmission path to a digital electric signal for each polarization component, and a reception-side signal processor performing reception-side digital signal processing which imparts a polarization change having a property substantially inverse to a property of the polarization change in the transmission-side signal processor with respect to the digital electric signal from the converter.
    • 光发送/接收系统包括:调制器,用于根据数据调制光以输出信号光; 执行发送侧数字信号处理的发送侧信号处理器,其相对于输入信号通过光调制而赋予信号光的偏振变化; 光发送器,其中调制器基于在发送侧信号处理器中进行发送侧数字信号处理的输入信号执行光调制; 以及光接收器,其包括将从所述光发送器输入的信号光经由传输路径转换为每个偏振分量的数字电信号的转换器,以及执行接收侧数字信号处理的接收侧信号处理器, 与传输侧信号处理器相对于来自转换器的数字电信号的偏振变化的特性基本上相反的特性。
    • 63. 发明申请
    • IDENTIFICATION, ALIGNMENT AND CROSS POLARIZATION OPTIMIZATION FOR ORTHOGONAL POLARIZED TRANSMISSION AND RELAY SYSTEMS
    • 正交偏振传输和继电器系统的识别,对准和极化极化优化
    • US20150003319A1
    • 2015-01-01
    • US14481083
    • 2014-09-09
    • Comtech EF Data Corp.
    • Michael Beeler
    • H04B7/155H04L1/00H04B7/185
    • H04B7/1555H04B7/18515H04B10/532H04B10/614H04B14/008H04J14/06H04L1/0076
    • A method of and system for distinguishing polarizations and information about the carrier signals transmitted from a repeating relay comprising encoding, using an encoder, a first data stream and a second data stream at a repeating relay, modulating, using a modulator, the first and second encoded data streams at the repeating relay, spreading, using a spreader, the first modulated data stream such that a first spread waveform results having first spreading characteristics and the second modulated data stream such that a second spread waveform results having second spreading characteristics, wherein the first spreading characteristics and the second spreading characteristics are different and differentiate the first spread waveform from the second spread waveform, and transmitting the first spread waveform as a first spread spectrum carrier signal on a first electromagnetic polarization and the second spread waveform as a second spread spectrum carrier signal on a second EM polarization.
    • 用于区分从重复中继发送的载波信号的偏振和信息的方法和系统,包括使用编码器在重复继电器处编码第一数据流和第二数据流,使用调制器调制第一和第二 在重复中继处的编码数据流,使用扩展器扩展第一调制数据流,使得第一扩展波形具有第一扩展特性和第二调制数据流,使得第二扩展波形具有第二扩展特性,其中, 第一扩展特性和第二扩展特性是不同的,并且区分第一扩展波形与第二扩展波形,并且将第一扩展波形作为第一电磁偏振的第一扩展频谱载波信号和作为第二扩展频谱的第二扩展波形 载波信号在第二EM极化 n。
    • 64. 发明申请
    • Method, Apparatus, and System for Processing Optical Network Signal
    • 光网络信号处理方法,装置和系统
    • US20140348507A1
    • 2014-11-27
    • US14453351
    • 2014-08-06
    • Huawei Technologies Co., Ltd.
    • Lei ZhouGuikai PengMeng SuiZhenping WangNing Cheng
    • H04J14/06H04B10/532H04B10/60H04B10/27
    • H04J14/06H04B10/2587H04B10/27H04B10/272H04B10/532H04B10/60
    • Embodiments of the present invention provide a method, an apparatus, and a system for processing an optical network signal. The method includes: receiving an optical signal sent by an optical line terminal, where the optical signal includes two polarization components perpendicular to each other, and downlink data is modulated on one of the polarization components; dividing the optical signal into two signals, where each signal is the optical signal; demodulating the downlink data from one optical signal and performing, for the other optical signal, vertical polarization rotation processing and processing of modulating uplink data onto two polarization components of the optical signal; sending the other optical signal on which the vertical polarization rotation processing and the uplink data modulation processing are performed to the optical line terminal. With the embodiments of the present invention, signal processing load of the optical network unit and the optical line terminal can be lowered.
    • 本发明的实施例提供一种用于处理光网络信号的方法,装置和系统。 该方法包括:接收由光线路终端发送的光信号,其中光信号包括彼此垂直的两个偏振分量,下行数据在偏振分量之一上进行调制; 将光信号分为两个信号,每个信号是光信号; 对一个光信号解调下行链路数据,对另一个光信号执行垂直偏振旋转处理和将上行链路数据调制到光信号的两个偏振分量上; 发送其上执行垂直偏振旋转处理和上行数据调制处理的另一光信号到光线路终端。 利用本发明的实施例,可以降低光网络单元和光线路终端的信号处理负担。
    • 65. 发明申请
    • METHOD AND APPARATUSES FOR ALGORITHM ON QAM COHERENT OPTICAL DETECTION
    • 用于QAM相关光学检测的算法的方法和装置
    • US20140341236A1
    • 2014-11-20
    • US14268739
    • 2014-05-02
    • ZTE (USA) INC.
    • Jianjun YuJin Tang
    • H04J14/06H04B10/2575
    • H04J14/06H04B10/532H04B10/541H04L27/223H04L27/227H04L27/3818
    • Blind polarization demultiplexing algorithms based on complex independent component analysis (ICA) by negentropy maximization for quadrature amplitude modulation (QAM) coherent optical systems are disclosed. The polarization demultiplexing is achieved by maximizing the signal's non-Gaussianity measured by the information theoretic quantity of negentropy. An adaptive gradient optimization algorithm and a Quasi-Newton algorithm with accelerated convergence are employed to maximize the negentropy. Certain approximate nonlinear functions can be substitutes for the negentropy which is strictly derived from the probability density function (PDF) of the received noisy QAM signal with phase noise, and this reduces the computational complexity. The numerical simulation and experimental results of polarization division multiplexing (PDM)-quadrature phase shift keying (QPSK) and PDM-16QAM reveal that the ICA demultiplexing algorithms are feasible and effective in coherent systems and the simplified ones can also achieve equivalent performance.
    • 公开了通过正交幅度调制(QAM)相干光学系统的负熵最大化的基于复数独立分量分析(ICA)的盲极化解复用算法。 通过最大化由信息理论量的负熵测量的信号的非高斯度来实现偏振解复用。 采用自适应梯度优化算法和加速收敛的准牛顿算法来最大化负熵。 某些近似非线性函数可以替代从接收到的具有相位噪声的噪声QAM信号的概率密度函数(PDF)中导出的负熵,这降低了计算复杂度。 偏振分复用(PDM) - 相移键控(QPSK)和PDM-16QAM的数值模拟和实验结果表明,ICA解复用算法在相干系统中可行且有效,简化的算法也可以实现等效的性能。
    • 66. 发明申请
    • DIRECTLY-MODULATED MULTI-POLARIZATION OPTICAL TRANSMITTERS
    • 直接调制多极化光学发射器
    • US20140314368A1
    • 2014-10-23
    • US14254296
    • 2014-04-16
    • ZTE (USA) INC.
    • Hung-Chang ChienZhensheng JiaJianjun Yu
    • G02B6/10
    • G02B6/105H04B10/5053H04B10/532H04B10/5561
    • The present invention relates to optical transmitters, transceivers, and transponders used for transmission of information or data in any form through a physical medium dependent (PMD) network. The speed of such networks depends, in part, on the density of information that can be transmitted through the physical medium. Optical transmitters or transceivers can be used to transmit multiple independent signals simultaneously through the same medium using different directions or axes of polarization, where the difference in the directions or axes of polarization can be used to distinguish the multiple signals at the receiver. In this invention, we use a master laser (l0) to synchronize two slave lasers (l1 and l2) by its x-polarization and y-polarization components of carrier, respectively, so that two slave lasers can be enforced to lock on exactly the same wavelength l0 with perpendicular polarization directions.
    • 本发明涉及用于通过物理介质依赖(PMD)网络以任何形式传输信息或数据的光发射机,收发机和应答器。 这种网络的速度部分取决于可以通过物理介质传输的信息的密度。 光发射器或收发器可用于通过使用不同方向或偏振轴的同一介质同时传输多个独立信号,其中极化方向或偏心轴的差异可用于区分接收器处的多个信号。 在本发明中,我们使用主激光器(10)来分别使两个从属激光器(l1和l2)分别乘以载波的x偏振和y偏振分量,从而可以强制执行两个从属激光器来精确地锁定 具有垂直偏振方向的相同波长l0。
    • 68. 发明申请
    • OPTICAL TRANSMITTER AND MODULATED OPTICAL SIGNAL GENERATING METHOD
    • 光发射机和调制光信号发生方法
    • US20140212136A1
    • 2014-07-31
    • US14132867
    • 2013-12-18
    • FUJITSU LIMITED
    • Yuichi AkiyamaTakeshi HoshidaTamotsu AkashiYoshio Sakai
    • H04B10/532
    • H04B10/532H04B10/2513H04B10/25137H04B10/50597H04B2210/254
    • An optical transmitter includes: an optical modulator including a first modulation unit and a second modulation unit respectively configured to propagate a first optical signal and a second optical signal that are obtained by splitting input light; a signal generator configured to generate a first drive signal and a second drive signal that are respectively supplied to the first modulation unit and the second modulation unit; a phase controller configured to control a phase difference between the first optical signal and the second optical signal in the optical modulator; and a phase difference detector configured to detect the phase difference between the first optical signal and the second optical signal controlled by the phase controller. The signal generator generates the first drive signal and the second drive signal based on the phase difference detected by the phase difference detector.
    • 光发射机包括:光调制器,包括第一调制单元和第二调制单元,第一调制单元和第二调制单元分别被配置为传播通过分割输入光获得的第一光信号和第二光信号; 信号发生器,被配置为产生分别提供给所述第一调制单元和所述第二调制单元的第一驱动信号和第二驱动信号; 相位控制器,被配置为控制所述光调制器中的所述第一光信号和所述第二光信号之间的相位差; 以及相位差检测器,被配置为检测由所述相位控制器控制的所述第一光信号和所述第二光信号之间的相位差。 信号发生器基于由相位差检测器检测的相位差产生第一驱动信号和第二驱动信号。
    • 70. 发明申请
    • OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION METHOD
    • 光传输系统和光传输方法
    • US20140112664A1
    • 2014-04-24
    • US14056803
    • 2013-10-17
    • NEC Corporation
    • Makoto SHIBUTANI
    • H04B10/532
    • H04B10/532
    • An optical transmission system 1 includes an optical transmitter 10 and an optical receiver 200. The optical transmitter 10 includes, a multiplexed code sequence generation unit 90a arranged to multiplex a code included in the transmission code sequence to be time shifted, and an optical transmission unit 90b that converts a multiplexed code sequence into a light signal and transmit it. The optical receiver 200 includes, an optical reception unit 240 that receives and converts the light signal transmitted from the optical transmitter 10 into a code sequence, and a transmission code sequence regeneration unit 380 that regenerates the transmission code sequence by identifying a code based on a value of a plurality of codes each corresponding to one another included in the code sequence.
    • 光传输系统1包括光发射机10和光接收机200.光发射机10包括多路复用码序列生成单元90a,被配置为复用包含在时隙中的传输码序列中的码和光传输单元 90b将多路复用码序列转换为光信号并发送。 光接收器200包括:光接收单元240,其将从光发送器10发送的光信号接收并转换为码序列;以及发送代码序列再生单元380,其通过基于代码序列识别码重新生成发送代码序列 每个代码序列中包含的彼此对应的多个代码的值。