GENERALIZED OFDM (GOFDM) FOR ULTRA-HIGH-SPEED SERIAL OPTICAL TRANSPORT NETWORKS
    62.
    发明申请
    GENERALIZED OFDM (GOFDM) FOR ULTRA-HIGH-SPEED SERIAL OPTICAL TRANSPORT NETWORKS 有权
    用于超高速串行光传输网络的通用OFDM(GOFDM)

    公开(公告)号:US20120263251A1

    公开(公告)日:2012-10-18

    申请号:US13270211

    申请日:2011-10-10

    IPC分类号: H04L23/02 H04L27/28

    摘要: A coded multidimensional modulation system called generalized OFDM (GOFDM) uses orthogonal subcarriers as bases functions, and the signal constellation points of corresponding multidimensional constellation diagram are obtained as N-dimensional Cartesian product of one-dimensional PAM/two-dimensional QAM. In GOFDM, the N-dimensional/2N-dimensional signal constellation point is transmitted over all N subcarriers/2N-subcarriers, which serve as individual bases functions. Even if some of the subcarriers are severely affected by channel distortion, the overall signal constellation point will face only small distortion, when strong channel capacity achieving channel codes are used. In addition, because the channel capacity is a linear function of number of dimensions, the spectral efficiency of optical transmission systems is significantly improved. Finally, since Euclidean distance of multidimensional signal constellation is much larger that that of two-dimensional signal constellations, OSNR sensitivity is dramatically improved.

    摘要翻译: 称为广义OFDM(GOFDM)的编码多维调制系统使用正交子载波作为基本功能,并且获得相应多维星座图的信号星座点作为一维PAM /二维QAM的N维笛卡尔乘积。 在GOFDM中,N维/ 2N维信号星座点在用作各个基本功能的所有N个子载波/ 2N个子载波上发送。 即使某些子载波受到信道失真的严重影响,当使用实现信道码的强信道容量时,整个信号星座点也只会面临小的失真。 另外,由于信道容量是维数的线性函数,所以光传输系统的频谱效率显着提高。 最后,由于多维信号星座的欧几里德距离远大于二维信号星座的距离,因此OSNR灵敏度得到显着提高。

    Polarization-Alternating Optical Signal Generation using CSRZ Modulation
    63.
    发明申请
    Polarization-Alternating Optical Signal Generation using CSRZ Modulation 有权
    使用CSRZ调制的极化交替光信号生成

    公开(公告)号:US20120251028A1

    公开(公告)日:2012-10-04

    申请号:US13435775

    申请日:2012-03-30

    IPC分类号: G02F1/01

    摘要: A method for optical chirp-free optical polarization modulation includes dividing a data modulated optical signal into a first optical path and a second optical path, using a Mach-Zehnder intensity modulator in the first optical path for imparting a π phase difference between adjacent symbols of the data modulated optical signal in the first optical path, adjusting a delay and amplitude of symbols of the data modulated optical signal in the second path so that the symbols in the first path and the symbols in the second path are synchronized and have substantially equal power levels, and combining the first and second optical paths so that symbols from the first and second optical paths are in orthogonal polarizations.

    摘要翻译: 一种用于无啁啾光学偏振调制的方法包括:使用第一光路中的马赫 - 曾德尔强度调制器将数据调制光信号划分成第一光路和第二光路, 在第一光路中的数据调制光信号的相邻符号之间的相位差,调整第二路径中的数据调制光信号的符号的延迟和幅度,使得第一路径中的符号和第二路径中的符号为 同步并且具有基本上相等的功率电平,并且组合第一和第二光路,使得来自第一和第二光路的符号处于正交偏振。

    Polarization independent frequency domain equalization (FDE) for chromatic dispersion (CD) compensation in PolMux coherent systems
    64.
    发明授权
    Polarization independent frequency domain equalization (FDE) for chromatic dispersion (CD) compensation in PolMux coherent systems 有权
    PolMux相干系统中用于色散(CD)补偿的偏振无关频域均衡(FDE)

    公开(公告)号:US08233809B2

    公开(公告)日:2012-07-31

    申请号:US12607125

    申请日:2009-10-28

    IPC分类号: H04B10/06

    摘要: A method for the polarization independent frequency domain equalization (FDE) chromatic dispersion compensation on polarization multiplexing (POLMUX) coherent systems. Operationally, time domain signals are converted to frequency domain signals such that time domain convolution can be done as simple multiplications in the frequency domain. These frequency domain signals then converted back to time domain for subsequent use. The input signal size and FFT size are advantageously designed so that the output signals can be continuous with some overlap between two successive frames.

    摘要翻译: 一种用于偏振复用(POLMUX)相干系统上的偏振独立频域均衡(FDE)色散补偿的方法。 在操作上,时域信号被转换成频域信号,使得时域卷积可以作为频域中的简单乘法来完成。 然后,这些频域信号被转换回到时域以供后续使用。 有利地设计输入信号尺寸和FFT尺寸,使得输出信号可以是连续的,在两个连续帧之间具有一些重叠。

    Feedback adjustable constellation de-mapper
    66.
    发明授权
    Feedback adjustable constellation de-mapper 有权
    反馈可调星座去映射器

    公开(公告)号:US08184731B2

    公开(公告)日:2012-05-22

    申请号:US12372378

    申请日:2009-02-17

    IPC分类号: H04L5/12

    CPC分类号: H04L27/233

    摘要: A system and method to adjust the symbol constellation used to de-map a signal in an optical coherent communications system. A feedback de-mapper adjustment module is configured to compare average Error Vector Magnitude and Bit Error Ratio to a pre-defined table to determine when a constellation de-mapper mismatch occurs. The feedback de-mapper adjustment module then rotates the de-mapper constellation in order to compensate for phase drift.

    摘要翻译: 一种用于调整用于在光学相干通信系统中去映射信号的符号星座的系统和方法。 反馈解映射器调整模块被配置为将平均误差矢量幅度和误码率与预定义的表进行比较,以确定何时发生星座解映射器失配。 反馈解映射器调整模块随后旋转去映射器星座以便补偿相位漂移。

    OPTIMIZED NORMALIZED LEAST MEAN SQUARE PHASE ESTIMATION
    67.
    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

    IPC分类号: H04B10/06 H03D1/06

    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。

    K-Means Clustered Polyphase Filtering for Sample Rate Conversion in Coherent Polarization Multiplexing Fiber Optic Systems
    68.
    发明申请
    K-Means Clustered Polyphase Filtering for Sample Rate Conversion in Coherent Polarization Multiplexing Fiber Optic Systems 审中-公开
    K均值聚相多相滤波在相干极化复用光纤系统中的采样率转换

    公开(公告)号:US20120082457A1

    公开(公告)日:2012-04-05

    申请号:US12894742

    申请日:2010-09-30

    IPC分类号: H04J14/06

    CPC分类号: H04B10/616

    摘要: A method for clustered polyphase filtering input data converted from an optical signal converting input data from a serial form into a parallel form, permutating data symbols from the input data to form K clusters, passing the permutated data to an adder and multiplier for each cluster; and adding output of all K multipliers together to form an output.

    摘要翻译: 一种用于将从串行形式的输入数据转换成并行形式的光信号转换的聚簇多相滤波输入数据的方法,从输入数据排列数据符号以形成K个簇,将排列数据传递给每个簇的加法器和乘法器; 并将所有K个乘法器的输出相加在一起以形成输出。

    Method and device for flow counting and automatically calculating internet connection fee
    69.
    发明申请
    Method and device for flow counting and automatically calculating internet connection fee 有权
    流量计算方法和装置,并自动计算互联网连接费

    公开(公告)号:US20120082059A1

    公开(公告)日:2012-04-05

    申请号:US13257922

    申请日:2009-08-21

    申请人: Ting Wang Xinqi Wu

    发明人: Ting Wang Xinqi Wu

    IPC分类号: H04W4/26

    摘要: The present disclosure discloses a method for traffic counting, in which an address space for storing the traffic data of a user is allocated in a wireless network card. The method includes the following steps of: within a preset counting period, counting uplink traffic and downlink traffic after the wireless network card accesses the network, and updating the traffic data of the current online user stored in the address space of the wireless network card. The present disclosure also provides a method for automatically calculating a cost of surfing a network, including the following steps of: monitoring updated charging standards in real time or periodically; within a preset counting period, counting uplink traffic and downlink traffic and updating the traffic data corresponding to the current user; and within a preset charging period, calculating the current cost of surfing a network of the current day or the current month according to a charging standard for surfing the network and the traffic data of the current user. Accordingly, the present disclosure further provides a device for traffic counting and a device for automatically calculating a cost of surfing a network.

    摘要翻译: 本公开公开了一种用于业务计数的方法,其中用于存储用户的业务数据的地址空间被分配在无线网卡中。 该方法包括以下步骤:在预设计数周期内,对无线网卡访问网络后的上行流量和下行流量进行计数,并更新存储在无线网卡地址空间中的当前在线用户的流量数据。 本公开还提供了一种用于自动计算网络冲浪成本的方法,包括以下步骤:实时或周期性地监视更新的计费标准; 在预设计数周期内,计数上行流量和下行流量,并更新与当前用户对应的流量数据; 并且在预设充电期间内,根据用于上网的充电标准和当前用户的流量数据,计算当前日或当前月份的网络冲浪的当前成本。 因此,本公开还提供了一种用于交通计数的装置和用于自动计算上网冲浪成本的装置。