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    Optical-layer traffic grooming at an OFDM subcarrier level with photodetection conversion of an input optical OFDM to an electrical signal
    43.
    发明授权
    Optical-layer traffic grooming at an OFDM subcarrier level with photodetection conversion of an input optical OFDM to an electrical signal 有权
    在OFDM子载波电平处的光层业务整合，其中输入光OFDM的光检测转换为电信号

    公开(公告)号：US08787762B2

    公开(公告)日：2014-07-22

    申请号：US13402418

    申请日：2012-02-22

    Applicant: Philip N. Ji ,  Dayou Qian ,  Ankitkumar N. Patel ,  Ting Wang ,  Yoshiaki Aono

    Inventor： Philip N. Ji ,  Dayou Qian ,  Ankitkumar N. Patel ,  Ting Wang ,  Yoshiaki Aono

    IPC: H04J14/02

    CPC classification number: H04J14/0212 ,  H04J14/0298

    Abstract: A method for optical layer traffic grooming includes receiving at least two optical input signals into respective optical receivers, each optical receiver having a photodetector for converting the respective optical input signal into a respective electrical signal; a grooming processor responsive to the electrical signals, the grooming processor being a radio frequency RF processor for processing the electrical signals at a subcarrier level to produce an RF orthogonal frequency division multiplexing signal OFDM signal; and modulating the groomed RF OFDM signal at a transmitter for conversion of the groomed RF OFDM into an optical signal.

    Abstract translation: 一种用于光层流量梳理的方法包括：将至少两个光输入信号接收到相应的光接收器中，每个光接收器具有用于将相应的光输入信号转换成相应的电信号的光电检测器; 一个整理处理器，响应于电信号，整修处理器是一个射频RF处理器，用于处理子载波电平的电信号，以产生一个RF正交频分复用信号OFDM信号; 以及在发射机处调制经修整的RF OFDM信号，以将整修的RF OFDM转换成光信号。

    Efficient square-root free 2 symbol max-log receiver
    44.
    发明授权
    Efficient square-root free 2 symbol max-log receiver 有权
    高效的平方根自由2符号最大对数接收器

    公开(公告)号：US08767888B2

    公开(公告)日：2014-07-01

    申请号：US13433873

    申请日：2012-03-29

    Applicant: Narayan Prasad ,  Neda Cvijetic ,  Sampath Rangarajan ,  Ting Wang

    Inventor： Narayan Prasad ,  Neda Cvijetic ,  Sampath Rangarajan ,  Ting Wang

    IPC: H04L27/06 ,  H04L25/02 ,  H04L25/06 ,  H04L25/03

    CPC classification number: H04L25/0246 ,  H04L25/03171 ,  H04L25/067

    Abstract: The present invention employs a look up table based implementation for the metric computations which eliminate redundancy and substantially reduce the number of multiplications. Moreover, inventive method exploits the fact that the un-normalized constellation symbols are complex integers so that the product of a real-number and an un-normalized constellation symbol can be implemented by only additions. The inventive method also enables a greater efficiency for whitening colored noise prior to demodulation, one of which involves no square-root operation. The invention results in less complexity, faster operation, lower power consumption, without sacrificing performance.

    Abstract translation: 本发明使用用于度量计算的查找表实现，其消除冗余并且显着减少乘法次数。 此外，本发明的方法利用了未归一化的星座符号是复数整数的事实，使得实数和未归一化的星座符号的乘积可以仅通过添加来实现。 本发明的方法还使得能够在解调之前增加有色噪声的效率，其中之一不涉及平方根操作。 本发明导致更少的复杂性，更快的操作，更低的功耗，而不会牺牲性能。

    Carrier and subcarrier hopping for optical OFDM security
    45.
    发明授权
    Carrier and subcarrier hopping for optical OFDM security 有权
    载波和子载波跳频用于光OFDM安全

    公开(公告)号：US08724998B2

    公开(公告)日：2014-05-13

    申请号：US13478892

    申请日：2012-05-23

    Applicant: Lei Xu ,  Dayou Qian ,  Ting Wang

    Inventor： Lei Xu ,  Dayou Qian ,  Ting Wang

    IPC: H04B10/04 ,  H04J14/00

    CPC classification number: H04L5/0012 ,  H04L5/0008 ,  H04L27/2642 ,  H04L27/2647

    Abstract: 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.

    Abstract translation: 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。

    Chromatic dispersion compensation using sign operations and lookup tables
    46.
    发明授权
    Chromatic dispersion compensation using sign operations and lookup tables 有权
    使用符号操作和查找表进行色散补偿

    公开(公告)号：US08718474B2

    公开(公告)日：2014-05-06

    申请号：US13267131

    申请日：2011-10-06

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

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

    IPC: H04B10/00 ,  H04J14/02 ,  H04B10/04

    CPC classification number: H04B10/25133

    Abstract: 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.

    Abstract translation: 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。

    Efficient MAC protocol for OFDMA passive optical networks (PONs)
    47.
    发明授权
    Efficient MAC protocol for OFDMA passive optical networks (PONs) 有权
    用于OFDMA无源光网络（PON）的高效MAC协议

    公开(公告)号：US08718473B2

    公开(公告)日：2014-05-06

    申请号：US13270209

    申请日：2011-10-10

    Applicant: Jingjing Zhang ,  Ting Wang

    Inventor： Jingjing Zhang ,  Ting Wang

    IPC: H04J14/02

    CPC classification number: H04J14/0298 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0053 ,  H04L5/0064 ,  H04Q11/0067 ,  H04Q2011/0064

    Abstract: Systems and methods are disclosed for providing media access control (MAC) in an optical network by providing a separate control channel and data channel; dedicating each optical network unit (ONU) with one control channel, wherein the control message is transmitted at any time without constraints; sending a grant message to an ONU just before an allocated time is about to start; and sending data traffic from the ONU immediately after receiving the grant message without synchronizing with an optical line terminal (OLT) clock.

    Abstract translation: 公开了用于通过提供单独的控制信道和数据信道在光网络中提供媒体接入控制（MAC）的系统和方法; 将每个光网络单元（ONU）专用于一个控制信道，其中所述控制消息在任何时间被无限制地发送; 在分配的时间即将开始之前向ONU发送授权消息; 并且在接收到授权消息之后立即从ONU发送数据业务，而不与光线路终端（OLT）时钟同步。

    Transmitter compensation in decoding of intensity modulated optical OFDM with direct detection
    48.
    发明授权
    Transmitter compensation in decoding of intensity modulated optical OFDM with direct detection 有权
    用于直接检测的强度调制光OFDM解码中的发射机补偿

    公开(公告)号：US08699640B2

    公开(公告)日：2014-04-15

    申请号：US12630167

    申请日：2009-12-03

    Applicant: Junqiang Hu ,  Dung-Huy Han ,  Ting Wang

    Inventor： Junqiang Hu ,  Dung-Huy Han ,  Ting Wang

    IPC: H04L25/08

    CPC classification number: H04L27/2649 ,  H04L25/0307 ,  H04L25/03159 ,  H04L27/223 ,  H04L27/2697 ,  H04L2025/03388 ,  H04L2025/03414

    Abstract: A method by an optical OFDM receiver includes converting a received optical signal to an electrical signal, deriving a digital signal from the electrical signal, and emulating, with an iterative OFDM demodulator responsive to the digital signal, a transmitter effect in the received signal of lower peak clipping and top peak distortion and applying the transmitter effect to the received signal and a decision-made signal for estimating an error function to be applied to a demodulation of the received optical signal.

    Abstract translation: 光OFDM接收机的方法包括将接收到的光信号转换为电信号，从电信号导出数字信号，并用响应于数字信号的迭代OFDM解调器仿真接收信号中的发射机效应较低 峰值限幅和顶峰失真，并将发送器效应应用于接收信号，以及用于估计要应用于所接收的光信号的解调的误差函数的决定信号。

    Generalized OFDM (GOFDM) for ultra-high-speed serial optical transport networks
    49.
    发明授权
    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广义OFDM（GOFDM）

    公开(公告)号：US08699625B2

    公开(公告)日：2014-04-15

    申请号：US13270211

    申请日：2011-10-10

    Applicant: Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

    Inventor： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

    IPC: H03K9/00 ,  H04Q11/02 ,  H04B3/20

    CPC classification number: H04L1/0057 ,  H04L1/0042 ,  H04L5/0016 ,  H04L5/04 ,  H04L25/067 ,  H04L27/2628 ,  H04L27/3427

    Abstract: 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.

    Abstract translation: 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。

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