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    Method and device for reducing interference between a power line carrier signal and a VDSL type signal
    2.
    发明授权
    Method and device for reducing interference between a power line carrier signal and a VDSL type signal 有权
    用于减少电力线载波信号和VDSL型信号之间干扰的方法和装置

    公开(公告)号：US08982967B2

    公开(公告)日：2015-03-17

    申请号：US13257392

    申请日：2010-03-15

    申请人： Roger Samy

    发明人： Roger Samy

    IPC分类号： H04B3/00 ,  H04L5/00 ,  H04B3/28 ,  H04L27/36

    CPC分类号： H04L5/0008 ,  H04B3/28 ,  H04L5/0042 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0062 ,  H04L27/36

    摘要： The present invention concerns a method of reducing interference between a carrier current signal (SCPL) transmitted over an electrical line (Le) and a signal of the VDSL type (SVDSL) transmitted over a telephone line (Lpots) that is situated close to the electrical line (Le). Said signals (SCPL, SVDSL) routing data in the form of bits that are attributed to carrier frequencies (Fk) distributed in the same frequency band on different frequency planes, characterized in that it comprises. a step (1) for determining at least one carrier frequency (FVDSL), referred to as the VDSL frequency, of a frequency plane used for transmitting the VDSL-type signal the spectral power density level of which is higher than a predetermined threshold (Th), a step (2) for determining at least one carrier frequency (FCPL), referred to as the CPL frequency, of another frequency plane used for transmitting the carrier current signal and which is common with at least one VDSL frequency thus determined (FVDSL), and a step (3) for reducing the number of bits (NCPL) attributed up until then to each so-called CPL frequency (FCPL) thus determined.

    摘要翻译： 本发明涉及一种减少通过电线（Le）传输的载波电流信号（SCPL）与通过电气线路（Lpots）传输的VDSL型信号（SVDSL）之间的干扰的方法，该电话线（Lpots）位于电气线 线（Le）。 所述信号（SCPL，SVDSL）以归属于分布在不同频率平面上的相同频带中的载波频率（F k）的位的形式路由数据，其特征在于它包括。 用于确定用于发送其频谱功率密度等级高于预定阈值的VDSL型信号的频率平面的至少一个载波频率（FVDSL）（称为VDSL频率）的步骤（1） ），用于确定用于发送载波电流信号的另一频率平面的至少一个载波频率（FCPL）（称为CPL频率）的步骤（2），并且与由此确定的至少一个VDSL频率相同（FVDSL ），以及用于减少直到归因于由此确定的每个所谓的CPL频率（FCPL）的位数（NCPL）的步骤（3）。

    Carrier and subcarrier hopping for optical OFDM security
    4.
    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

    申请人： Lei Xu ,  Dayou Qian ,  Ting Wang

    发明人： Lei Xu ,  Dayou Qian ,  Ting Wang

    IPC分类号： H04B10/04 ,  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。

    OPTICAL TRANSMITTER
    6.
    发明申请
    OPTICAL TRANSMITTER 有权
    光学发射器

    公开(公告)号：US20120230694A1

    公开(公告)日：2012-09-13

    申请号：US13347405

    申请日：2012-01-10

    申请人： Toshiki Tanaka ,  Tomoo Takahara ,  Shoichiro Oda ,  Takeshi Hoshida

    发明人： Toshiki Tanaka ,  Tomoo Takahara ,  Shoichiro Oda ,  Takeshi Hoshida

    IPC分类号： H04J14/02

    CPC分类号： H04J14/026 ,  H04B10/506 ,  H04B10/532 ,  H04J14/0298 ,  H04L5/0008 ,  H04L5/12 ,  H04L27/2096 ,  H04L27/2637 ,  H04L27/2642 ,  H04L27/2697

    摘要： A clock signal from a single reference clock is frequency converted, and the frequency-converted signal is input to an equal-interval-optical-frequency-comb generator and a modulator of an optical modulator. By varying the electric frequency of the clock signal input to the equal-interval-optical-frequency-comb generator, frequency intervals of a frequency comb to be generated can be varied, while by selectively employing a particular optical frequency from among the continuous light beams of the generated frequency comb, a frequency comb having unequal intervals can be generated. It is also possible to vary the modulation rate by varying the clock frequency of a driving signal to be input to the optical modulator. By using a clock signal of a single reference clock, the frequency intervals of the frequency comb and the variation of the modulation rate synchronize with each other.

    摘要翻译： 来自单个参考时钟的时钟信号被频率转换，并且频率转换的信号被输入到等间隔光频率梳发生器和光调制器的调制器。 通过改变输入到等间隔光频梳发生器的时钟信号的电频，可以改变要产生的频率梳的频率间隔，同时通过选择性地使用来自连续光束中的特定光频 可以产生具有不等间隔的频率梳。 也可以通过改变要输入到光调制器的驱动信号的时钟频率来改变调制速率。 通过使用单个参考时钟的时钟信号，频率梳的频率间隔和调制速率的变化彼此同步。

    WAVELENGTH DIVISION MULTIPLEXED OPTICAL COMMUNICATION SYSTEM HAVING VARIABLE CHANNEL SPACINGS AND DIFFERENT MODULATION FORMATS
    7.
    发明申请
    WAVELENGTH DIVISION MULTIPLEXED OPTICAL COMMUNICATION SYSTEM HAVING VARIABLE CHANNEL SPACINGS AND DIFFERENT MODULATION FORMATS 有权
    具有可变通道间距和不同调制格式的波长段多路复用光通信系统

    公开(公告)号：US20120082459A1

    公开(公告)日：2012-04-05

    申请号：US12897787

    申请日：2010-10-05

    申请人： Kuang-Tsan Wu ,  John D. McNicol ,  David F. Welch ,  Stephen G. Grubb ,  Pierre Mertz

    发明人： Kuang-Tsan Wu ,  John D. McNicol ,  David F. Welch ,  Stephen G. Grubb ,  Pierre Mertz

    IPC分类号： H04J14/02

    CPC分类号： H04J14/02 ,  H04B10/616 ,  H04J14/0224 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/026 ,  H04J14/0279 ,  H04J14/06 ,  H04L1/0007 ,  H04L1/0009 ,  H04L5/0008 ,  H04L25/03834 ,  H04L27/0008 ,  H04L27/2035 ,  H04L27/223 ,  H04L27/34

    摘要： Consistent with the present disclosure, data, in digital form, is received by a transmit nodes of an optical communication, and converted to analog signal by a digital-to-analog converter (DAC) to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data. The modulated light is then transmitted over an optical communication path to a receive node. At the receive node, the modulated optical signal, as well as other modulated optical signals are supplied to a photodetector circuit, which receives additional light at one of the optical signal wavelengths from a local oscillator laser. An analog-to-digital converter (ADC) is provided in the receive node to convert the electrical signals output from the photodetector into digital form. The output from the ADC is then filtered in the electrical domain, such that optical demultiplexing of individual channels is unnecessary.

    摘要翻译： 与本公开一致，数字形式的数据由光通信的发射节点接收，并由数模转换器（DAC）转换为模拟信号以驱动调制器。 调制器又根据接收的数据调制多个波长中的一个波长的光。 然后将调制的光通过光通信路径传输到接收节点。 在接收节点处，调制的光信号以及其它调制的光信号被提供给光电检测器电路，光电检测器电路从本地振荡器激光器接收来自光信号波长之一的附加光。 在接收节点中提供模数转换器（ADC），以将从光电检测器输出的电信号转换为数字形式。 然后在电域中对来自ADC的输出进行滤波，使得各个信道的光解复用是不必要的。

    Agile RF band OFDM spread spectrum and cross-correlated systems
    9.
    发明授权
    Agile RF band OFDM spread spectrum and cross-correlated systems 失效
    敏捷RF频段OFDM扩频和交叉相关系统

    公开(公告)号：US07418028B2

    公开(公告)日：2008-08-26

    申请号：US11502720

    申请日：2006-08-10

    申请人： Kamilo Feher

    发明人： Kamilo Feher

    IPC分类号： H04B1/00

    CPC分类号： H04B7/0854 ,  H04B7/0602 ,  H04B2201/70703 ,  H04L1/205 ,  H04L5/0008 ,  H04L5/0016 ,  H04L5/0028 ,  H04L7/0008 ,  H04L25/0305 ,  H04L25/0307 ,  H04L25/4902 ,  H04L27/00 ,  H04L27/0004 ,  H04L27/0008 ,  H04L27/01 ,  H04L27/18 ,  H04L27/186 ,  H04L27/2017 ,  H04L27/2637 ,  H04L27/34 ,  H04L2025/03414 ,  Y02D70/122 ,  Y02D70/124 ,  Y02D70/444

    摘要： Agile Radio Frequency (RF) band selectable systems and circuits process and provide selection of baseband filtered Orthogonal Frequency Division Multiplexed (OFDM) modulated signals, of spread spectrum (SS) modulated signals and of baseband in-phase (I) and quadrature-phase (Q) shaped and or filtered baseband cross-correlated and modulated signals. A selector selects one or more of the filtered and or shaped RF modulated signals and provides the selected signal to the transmission medium.RF tunable (RF agile) circuits receive a first baseband filtered and modulated signal at a first bit rate and provide a first RF modulated signal in a first specified RF band and receive a second baseband waveform shaped and modulated signal at a second bit rate and provide waveform shaped and modulated RF signal in a second specified RF band, with the second specified RF band having a different specified RF band than the first specified RF band and the first bit rate being different than the second bit rate. A selector selects one of the RF modulated signals and provides the selected signal to the transmission medium.

    摘要翻译： 敏捷射频（RF）频带可选系统和电路处理并提供扩频（SS）调制信号和基带同相（I）和正交相位（I）的基带滤波正交频分复用（OFDM）调制信号的选择 Q）形状和或滤波的基带交叉相关和调制信号。 选择器选择一个或多个滤波和或成形的RF调制信号，并将选择的信号提供给传输介质。 RF可调谐（RF敏捷）电路以第一比特速率接收第一基带滤波和调制信号，并在第一指定RF频带中提供第一RF调制信号，并以第二比特率接收第二基带波形整形和调制信号，并提供 波形整形和调制RF信号在第二指定RF频带中，其中第二指定RF频带具有与第一指定RF频带不同的指定RF频带，并且第一比特率不同于第二比特率。 选择器选择RF调制信号中的一个并将所选择的信号提供给传输介质。

    Optimal filter-bank wavelet modulation
    10.
    发明授权
    Optimal filter-bank wavelet modulation 失效
    最优滤波器组小波调制

    公开(公告)号：US07333665B2

    公开(公告)日：2008-02-19

    申请号：US10876269

    申请日：2004-06-23

    申请人： David E. Orr

    发明人： David E. Orr

    IPC分类号： G06K9/00

    CPC分类号： H04L27/0004 ,  H04L5/0008 ,  H04L25/022 ,  H04L25/0228 ,  H04L25/03019 ,  H04L25/03159 ,  H04L25/03292 ,  H04L25/03885 ,  H04L25/05 ,  H04L27/0002

    摘要： A method for encoding, transmitting, and receiving signals utilizes adaptive wavelet packet trees. A transmitter accepts a binary data stream assumed to be random. At the transmitter the data is parsed from a serial bit stream into several parallel streams. Within each of the parallel bit streams symbols are formed from the bits. Signals are created from each symbol by up-sampling. These signals modulate low-pass and high-pass filters that are derived from a wavelet packet transform (the wavelet and scaling functions, or, equivalently the low-pass and high-pass analysis filters). The filters are paired—one high-pass with one low-pass. The steps recited above are recursively repeated log2 N times for a signal of length N. The resulting signal is transmitted to the receiver. At the receiver, the steps recited above are reversed at the receiver to recover symbols, with the up-sampled signal down-sampled to remove inserted zeroes.

    摘要翻译： 编码，发送和接收信号的方法利用自适应小波包树。 发射机接收假定为随机的二进制数据流。 在发射机上，数据从串行比特流解析成多个并行流。 在每个并行比特流内，从比特形成符号。 通过上采样从每个符号创建信号。 这些信号调制从小波包变换（小波和缩放函数，或等效于低通和高通分析滤波器）导出的低通滤波器和高通滤波器。 过滤器是一对一高通一个低通。 对于长度为N的信号，上述步骤被递归地重复log 2 N次。所得到的信号被发送到接收机。 在接收机上，上述步骤在接收机处被反转以恢复符号，上采样信号被下采样以去除插入的零。