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432 条记录 (耗时 0.031 秒)

    Low PAPR Modulation for Coverage Enhancement
    31.
    发明申请
    Low PAPR Modulation for Coverage Enhancement 有权
    低PAPR调制覆盖增强

    公开(公告)号：US20150280945A1

    公开(公告)日：2015-10-01

    申请号：US14225803

    申请日：2014-03-26

    申请人： Nokia Solutions and Networks Oy

    发明人： Jun TAN ,  Weidong YANG ,  Rapeepat RATASUK

    IPC分类号： H04L25/03 ,  H04B7/04 ,  H04B7/06

    CPC分类号： H04L25/03834 ,  H04B7/0478 ,  H04B7/0617 ,  H04B7/0669 ,  H04L25/03178 ,  H04L25/0384 ,  H04L25/03859 ,  H04L27/2003 ,  H04L27/2615 ,  H04L27/3411 ,  H04L27/3444

    摘要： A method includes receiving a two-bit information stream comprising first and second bits and performing precoding using the two-bit information stream to determine multiple output signals. The precoding is performed to create a finite multiple of states for the output signals. The output signals comprise a first output signal based on a version of the first input bit and on a version of a second input bit, a second output signal based on a delayed version of the first input bit and the version of the second input bit, and a third output signal based on the version of first input bit and a delayed version of the second input bit. The method includes performing pulse shaping of each of the output signals to create pulse-shaped signals, combining the pulse-shaped signals to create a transmission waveform, and outputting the transmission waveform. Apparatus, computer programs, and computer program products are disclosed.

    摘要翻译： 一种方法包括接收包含第一和第二比特的两比特信息流，并使用两比特信息流执行预编码以确定多个输出信号。 执行预编码以产生用于输出信号的有限数量的状态。 输出信号包括基于第一输入位的版本和第二输入位的版本的第一输出信号，基于第一输入位的延迟版本和第二输入位的版本的第二输出信号， 以及基于第一输入位的版本和第二输入位的延迟版本的第三输出信号。 该方法包括对每个输出信号进行脉冲整形以产生脉冲信号，组合脉冲信号以产生发送波形，并输出发送波形。 公开了装置，计算机程序和计算机程序产品。

    Optical modulation device and bias voltage control method
    32.
    发明授权
    Optical modulation device and bias voltage control method 有权
    光调制装置及偏压控制方法

    公开(公告)号：US09116368B2

    公开(公告)日：2015-08-25

    申请号：US14122687

    申请日：2012-08-21

    申请人： Hiroto Kawakami ,  Eiji Yoshida ,  Yutaka Miyamoto

    发明人： Hiroto Kawakami ,  Eiji Yoshida ,  Yutaka Miyamoto

    IPC分类号： G02F1/01 ,  G02F1/00 ,  H04B10/12 ,  G02B6/28 ,  G02F1/21 ,  H04B10/54 ,  H04L27/34 ,  H04L27/36 ,  H04B10/548 ,  H04B10/50

    CPC分类号： G02F1/0123 ,  G02B6/28 ,  G02F1/21 ,  G02F2001/212 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50595 ,  H04B10/541 ,  H04B10/548 ,  H04L27/3411 ,  H04L27/364

    摘要： An optical modulation device including: bias power supplies that output a signal having a bias voltage corresponding to the null point of an optical modulation unit to the optical modulation unit; and synchronous detection circuits that determine whether an intensity of a QAM signal at a drift non-occurrence time where no drift occurs in the bias voltage becomes larger or smaller than the intensity of the QAM signal at a drift occurrence time where a drift occurs in the bias voltage, adjust the bias voltage to maximize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes larger than the intensity of the QAM signal at the drift occurrence time, and adjust the bias voltage to minimize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes smaller than the intensity of the QAM signal at the drift occurrence time.

    摘要翻译： 一种光调制装置，包括：向光调制单元输出具有对应于光调制单元的零点的偏置电压的信号的偏置电源; 以及同步检测电路，其确定在偏置电压中不发生漂移的漂移不发生时间的QAM信号的强度是否大于或者小于在漂移发生时的QAM信号的强度， 当确定漂移不发生时间的QAM信号的强度变得大于漂移发生时的QAM信号的强度时，调整偏置电压以最大化QAM信号的强度，并且调整偏置 电压，以便在确定漂移不发生时间的QAM信号的强度变得小于漂移发生时的QAM信号的强度时，使QAM信号的强度最小化。

    Automatic power saving for communication systems
    34.
    发明授权
    Automatic power saving for communication systems 有权
    自动省电通信系统

    公开(公告)号：US09077499B2

    公开(公告)日：2015-07-07

    申请号：US13524976

    申请日：2012-06-15

    申请人： Chun-Che Chang ,  Sam Mungall ,  Ravi Mantri

    发明人： Chun-Che Chang ,  Sam Mungall ,  Ravi Mantri

    IPC分类号： G06F1/32 ,  H04L5/00 ,  H04L27/26 ,  H04L27/34

    CPC分类号： H04L5/0053 ,  G06F1/3203 ,  G06F1/3278 ,  H04L5/0007 ,  H04L5/0058 ,  H04L27/2614 ,  H04L27/3411 ,  Y02D10/157

    摘要： Various embodiments of a power saving scheme in data communication are provided. In one aspect, a method transmits a plurality of symbols each of which containing an overhead portion and at least a portion of a respective data transmission unit (DTU). In particular, the method transmits the overhead portion of a first symbol of the plurality of symbols and the at least a portion of a respective DTU of the first symbol when the at least a portion of the respective DTU of the first symbol contains payload data. The method transmits the overhead portion of a second symbol of the plurality of symbols without transmitting the at least a portion of a respective DTU of the second symbol when the at least a portion of the respective DTU of the second symbol contains no payload data.

    摘要翻译： 提供了数据通信中省电方案的各种实施例。 一方面，一种方法发送多个符号，每个符号包含开销部分和相应数据传输单元（DTU）的至少一部分。 具体地，当第一符号的相应DTU的至少一部分包含有效载荷数据时，该方法发送多个符号的第一符号的开销部分和第一符号的相应DTU的至少一部分。 当第二符号的相应DTU的至少一部分不包含有效负载数据时，该方法发送多个符号的第二符号的开销部分而不发送第二符号的相应DTU的至少一部分。

    Communications system using adaptive frequency notching
    35.
    发明授权
    Communications system using adaptive frequency notching 有权
    通信系统采用自适应频率切口

    公开(公告)号：US09001919B2

    公开(公告)日：2015-04-07

    申请号：US13383089

    申请日：2010-07-01

    申请人： Andreas Schwager ,  Gerd Spalink

    发明人： Andreas Schwager ,  Gerd Spalink

    IPC分类号： H04B15/00 ,  H04B3/54 ,  H04L5/00 ,  H04L25/02 ,  H04L27/34 ,  H04L25/03 ,  H04L27/26

    CPC分类号： H04B15/005 ,  H04B3/54 ,  H04B17/29 ,  H04B2203/5425 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/03828 ,  H04L27/2605 ,  H04L27/2626 ,  H04L27/3411

    摘要： A communications system includes a receiver unit connected with a transmission channel. The receiver unit determines a signal power of a first communications signal received over the transmission channel. A transmitter unit is connected with the transmission channel and transmits a second communications signal, wherein a gain of the communications signal being output by the transmitter unit is controllable. A control unit controls the gain of the transmitter unit in response to the determined signal power. At the receiver unit, detection of broadcast signal ingress during data communication is improved and methods for avoiding disturbances between coexisting communications systems may become more reliable. Different distances between successive training symbols suitable for channel estimation may be provided to enhance the noise measurement.

    摘要翻译： 通信系统包括与传输信道连接的接收机单元。 接收机单元确定通过传输信道接收的第一通信信号的信号功率。 发射机单元与传输信道连接并发送第二通信信号，其中由发射机单元输出的通信信号的增益是可控的。 控制单元响应于确定的信号功率来控制发射机单元的增益。 在接收机单元，改善数据通信期间广播信号入口的检测，避免共存通信系统之间干扰的方法可能变得更加可靠。 可以提供适合于信道估计的连续训练符号之间的不同距离，以增强噪声测量。

    TRANSMISSION APPARATUS AND WIRELESS SIGNAL TRANSMISSION METHOD
    37.
    发明申请
    TRANSMISSION APPARATUS AND WIRELESS SIGNAL TRANSMISSION METHOD 有权
    传输装置和无线信号传输方法

    公开(公告)号：US20140348266A1

    公开(公告)日：2014-11-27

    申请号：US14365868

    申请日：2012-11-02

    申请人： NEC Corporation

    发明人： Shingo Yamanouchi

    IPC分类号： H04B1/04 ,  H04L25/02 ,  H04L27/26

    CPC分类号： H04B1/0475 ,  H04B2001/0416 ,  H04B2201/70706 ,  H04L25/02 ,  H04L27/2614 ,  H04L27/2621 ,  H04L27/3411

    摘要： RF input signals having mutually different carrier frequencies are input from a signal generator to a power amplifier, the power amplifier amplifying the RF input signals and outputting them as RF output signals. The signal generator has a function for reducing the PAR of the waveform combining the RF input signals. The PAR reduction of the combined waveform of the RF input signals is performed through a control on the transmission timing of the RF input signals via a delay adjuster installed in the signal generator, or through an amplitude constraint on the RF input signals via a limiter installed in the signal generator. In this manner, a transmission device with improved power efficiency is provided.

    摘要翻译： 具有相互不同的载波频率的RF输入信号从信号发生器输入到功率放大器，功率放大器放大RF输入信号并将其作为RF输出信号输出。 信号发生器具有减少组合RF输入信号的波形的PAR的功能。 通过经由安装在信号发生器中的延迟调节器对RF输入信号的发送定时进行控制，或通过安装了限幅器的RF输入信号的幅度约束来执行RF输入信号的组合波形的PAR减小 在信号发生器中。 以这种方式，提供了具有提高的功率效率的传输装置。

    Wireless communication system, wireless transmission apparatus and wireless transmission method
    39.
    发明授权
    Wireless communication system, wireless transmission apparatus and wireless transmission method 有权
    无线通信系统，无线传输装置及无线传输方式

    公开(公告)号：US08717992B2

    公开(公告)日：2014-05-06

    申请号：US13255811

    申请日：2010-01-13

    申请人： Yasuhiro Hamaguchi ,  Kazunari Yokomakura ,  Osamu Nakamura ,  Jungo Goto ,  Hiroki Takahashi

    发明人： Yasuhiro Hamaguchi ,  Kazunari Yokomakura ,  Osamu Nakamura ,  Jungo Goto ,  Hiroki Takahashi

    IPC分类号： H04W4/00 ,  H04B7/185 ,  H04L27/34 ,  H04W40/08 ,  H04W40/10

    CPC分类号： H04W52/34 ,  H04L27/3405 ,  H04L27/3411 ,  H04W40/08 ,  H04W40/10 ,  H04W52/146 ,  H04W52/42

    摘要： Even when communication is performed independently in each CC (Component Carrier), the occurrence of an error in communication is prevented. Provided is a wireless communication system in which a wireless transmission apparatus and a wireless reception apparatus communicate with each other using a plurality of system frequency bands, wherein the wireless transmission apparatus performs transmission power control on transmission data in each of the system frequency bands, and furthermore, a maximum transmission power which can be transmitted in each of the system frequency bands can be controlled so as to be different from each other. Priorities are set on each of the system frequency bands, and transmission powers of the system frequency bands are determined in descending order of the priorities.

    摘要翻译： 即使在每个CC（分量载波）中独立地进行通信时，也防止了通信中出现错误。 提供一种无线通信系统，其中无线发送装置和无线接收装置使用多个系统频带进行通信，其中无线发送装置对各系统频带中的发送数据进行发送功率控制， 此外，可以控制可以在每个系统频带中发送的最大发送功率以彼此不同。 在每个系统频带上设置优先级，并且以优先级的降序确定系统频带的发送功率。