利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

184 条记录 (耗时 0.022 秒)

    Method for adaptive blind equalization of PSK signal, equalizer and receiver
    4.
    发明授权
    Method for adaptive blind equalization of PSK signal, equalizer and receiver 有权
    PSK信号，均衡器和接收机的自适应盲均衡方法

    公开(公告)号：US08666262B2

    公开(公告)日：2014-03-04

    申请号：US12906560

    申请日：2010-10-18

    申请人： Meng Yan ,  Huijian Zhang ,  Zhenning Tao ,  Shoichiro Oda

    发明人： Meng Yan ,  Huijian Zhang ,  Zhenning Tao ,  Shoichiro Oda

    IPC分类号： H04B10/60

    CPC分类号： H04L25/0305 ,  H04L2025/03401 ,  H04L2025/03675

    摘要： The present application discloses a method for adaptive blind equalization of a PSK signal, an equalizer and a receiver. According to embodiments as provided, a conjugate product of a current output and a precedent output of an FIR filter is calculated, an equalization coefficient is updated using the conjugate product, and then an input signal is filtered using the FIR filter with the updated equalization coefficient. The embodiments as provided is applicable to adaptive blind equalization of any phase shift keying signal including a BPSK signal.

    摘要翻译： 本申请公开了一种用于PSK信号，均衡器和接收机的自适应盲均衡的方法。 根据提供的实施例，计算FIR滤波器的电流输出和先前输出的共轭乘积，使用共轭乘积来更新均衡系数，然后使用具有更新的均衡系数的FIR滤波器对输入信号进行滤波 。 所提供的实施例可应用于包括BPSK信号的任何相移键控信号的自适应盲均衡。

    Communication system, transmitter, receiver and multiple access method
    5.
    发明授权
    Communication system, transmitter, receiver and multiple access method 有权
    通信系统，发射机，接收机和多种接入方式

    公开(公告)号：US08411779B2

    公开(公告)日：2013-04-02

    申请号：US12308849

    申请日：2007-06-15

    申请人： James Awuor Okello

    发明人： James Awuor Okello

    IPC分类号： H04B7/02 ,  H04L25/49

    CPC分类号： H04B7/0613 ,  H04B1/7107 ,  H04B7/0837 ,  H04L25/0305 ,  H04L25/03343 ,  H04L25/03866 ,  H04L2025/03407 ,  H04L2025/03426

    摘要： In a communications system including a transmitter for transmitting signals over a transmission channel and a receiver for receiving the signals, the transmitter includes: a filter for filtering a modulated signal to modify amplitude and phase characteristics of the modulated signal; and a first processor for performing interleaving process and/or scrambling process for the filtered signal. On the other hand, the receiver includes: a second processor for performing deinterleaving process and/or descrambling process for a received signal; and an inverse filter for filtering a signal supplied from the second processor.

    摘要翻译： 在包括用于通过传输信道发送信号的发射机和用于接收信号的接收机的通信系统中，发射机包括：滤波器，用于对调制信号进行滤波，以修改调制信号的幅度和相位特性; 以及用于对经滤波的信号执行交织处理和/或加扰处理的第一处理器。 另一方面，接收机包括：用于对接收到的信号执行解交织处理和/或解扰处理的第二处理器; 以及用于对从第二处理器提供的信号进行滤波的逆滤波器。

    Data communication circuit with equalization control
    6.
    发明授权
    Data communication circuit with equalization control 有权
    数据通信电路具有均衡控制

    公开(公告)号：US08396105B2

    公开(公告)日：2013-03-12

    申请号：US12067068

    申请日：2006-09-12

    申请人： Friedel Gerfers ,  Gerrit Willem Den Besten ,  Pavel Petkov ,  Andreas Koellmann ,  Jim E. Conder

    发明人： Friedel Gerfers ,  Gerrit Willem Den Besten ,  Pavel Petkov ,  Andreas Koellmann ,  Jim E. Conder

    IPC分类号： H03H7/30

    CPC分类号： H04L25/03885 ,  H04L25/0305 ,  H04L2025/03802 ,  H04L2027/0038

    摘要： An adaptive equalizer comprises an adjustable equalizer circuit that allows to enhance the frequency dependence of contents of the transmitted signals which suffer from losses in the connected transmission channel. A blind equalization tuning procedure is proposed that operates without knowledge about the characteristic of transmission channel. Phase positions of transitions in the equalized signal are detected. A digital post-processing circuit evaluates a measure for spread of the detected phase positions of transitions, accumulated over a plurality of the symbol periods. The digital post-processing circuit controls the adjustable equalizer, setting the adjustable equalizer to a setting wherein the detected spread is minimized.

    摘要翻译： 自适应均衡器包括可调均衡器电路，其允许增强受连接传输信道中的损耗的发射信号的内容的频率依赖性。 提出了一种在不了解传输信道特性的情况下进行盲均衡调整的过程。 检测均衡信号中的转换的相位位置。 数字后处理电路评估在多个符号周期中累积的检测到的相移位置的扩展的度量。 数字后处理电路控制可调均衡器，将可调均衡器设置为其中检测到的扩展最小化的设置。

    Method and apparatus for determining equalization coefficients
    7.
    发明授权
    Method and apparatus for determining equalization coefficients 有权
    用于确定均衡系数的方法和装置

    公开(公告)号：US08223830B2

    公开(公告)日：2012-07-17

    申请号：US12486921

    申请日：2009-06-18

    申请人： Steven D. Draving

    发明人： Steven D. Draving

    IPC分类号： H03K5/159

    CPC分类号： H04L25/0305

    摘要： A system for filtering a data signal includes an input configured to receive the data signal through a transmission medium and a filter configured to remove distortion from the received data signal using equalization coefficients. The system further includes a processing unit configured to determine dynamically the equalization coefficients of the filter without using a predetermined training pattern in the received data signal.

    摘要翻译： 用于过滤数据信号的系统包括被配置为通过传输介质接收数据信号的输入和被配置为使用均衡系数从接收到的数据信号中去除失真的滤波器。 该系统还包括处理单元，其被配置为动态地确定滤波器的均衡系数，而不在接收的数据信号中使用预定的训练模式。

    Adaptive interference cancellation algorithm using speech mode dependent thresholds
    8.
    发明授权
    Adaptive interference cancellation algorithm using speech mode dependent thresholds 有权
    使用语音模式相关阈值的自适应干扰消除算法

    公开(公告)号：US08068539B2

    公开(公告)日：2011-11-29

    申请号：US12893026

    申请日：2010-09-29

    申请人： Arkady Molev-Shteiman ,  Nelson R. Sollenberger ,  Huaiyu (Hanks) Zeng

    发明人： Arkady Molev-Shteiman ,  Nelson R. Sollenberger ,  Huaiyu (Hanks) Zeng

    IPC分类号： H03H7/30 ,  H04B1/10

    CPC分类号： H04L25/03038 ,  H04L25/0224 ,  H04L25/0305 ,  H04L25/03178 ,  H04L2025/03401

    摘要： Adaptive interference cancellation algorithm using speech mode dependent thresholds. A method of processing radio frequency (RF) bursts dependent on a speech mode associated with data contained within the RF burst is presented. Different voice modes, full rate, half rate, and adaptive multi-channel rates each may require different signal to noise ratio (SNR) conditions in order to be successfully processed. To improve the equalization, the SNR associated with the burst is estimated. Based on the SNR or other related conditions, a decision can be made as to whether or not an interference cancellation burst process should be implemented. For example, any one or more of SNR of the signal, a measure of colored noise within the signal, an indication whether the signal being noise limited or interference limited, and a channel profile of the signal may indicate the presence of interference requiring the cancellation of such interference.

    摘要翻译： 使用语音模式相关阈值的自适应干扰消除算法。 呈现依赖于与包含在RF突发内的数据相关联的语音模式的射频（RF）脉冲串的处理方法。 不同的语音模式，全速率，半速率和自适应多信道速率各自可能需要不同的信噪比（SNR）条件才能被成功处理。 为了改善均衡，估计与突发相关联的SNR。 基于SNR或其他相关条件，可以做出是否应该实施干扰消除突发过程的决定。 例如，信号的SNR中的任何一个或多个，信号内的彩色噪声的测量，噪声限制的信号或干扰受限的指示以及信号的信道分布可以指示存在需要消除的干扰 的这种干扰。

    FILTER, COHERENT RECEIVER DEVICE AND COHERENT RECEIVING METHOD
    9.
    发明申请
    FILTER, COHERENT RECEIVER DEVICE AND COHERENT RECEIVING METHOD 有权
    过滤器，相关接收器件和相关接收方法

    公开(公告)号：US20110243561A1

    公开(公告)日：2011-10-06

    申请号：US13020831

    申请日：2011-02-04

    申请人： Jianqiang LI ,  Huijian Zhang ,  Zhenning Tao ,  Takahito Tanimura

    发明人： Jianqiang LI ,  Huijian Zhang ,  Zhenning Tao ,  Takahito Tanimura

    IPC分类号： H04B10/06 ,  H04J14/06

    CPC分类号： H04L25/03019 ,  H04B10/611 ,  H04B10/614 ,  H04L25/0305 ,  H04L27/3818

    摘要： The present invention relates to filter, coherent receiver device and coherent receiving method. The filter is used for converting a partial response signal into a full response signal, wherein the filter uses the following transfer function HPre-Filter(z) with respect to a partial response signal having a transfer function H PR  ( z ) = A  ( 1 + z - 1 ) m  ( 1 - z - 1 ) n :   H Pre - Filter  ( z ) = 1 A  ( 1 + α   z - 1 ) m  ( 1 - α   z - 1 ) n , in which A is other item, m and n are integers larger than or equal to 0 but not being 0 at the same time, 0

    摘要翻译： 本发明涉及滤波器，相干接收机装置和相干接收方法。 滤波器用于将部分响应信号转换成全响应信号，其中滤波器对于具有传递函数H PR（z）= A的部分响应信号使用以下传递函数HPre-Filter（z） （1 + z-1）m（1-z-1）n：前一个滤波器（z）= 1 A（1 +α） z-1）n，其中A是其他项，m和n是大于或等于0但不同时为0的整数，0 <α<1。

    OPTICAL OFDM RECEIVER, OPTICAL TRANSMISSION SYSTEM, SUBCARRIER SEPARATION CIRCUIT, AND SUBCARRIER SEPARATION METHOD
    10.
    发明申请
    OPTICAL OFDM RECEIVER, OPTICAL TRANSMISSION SYSTEM, SUBCARRIER SEPARATION CIRCUIT, AND SUBCARRIER SEPARATION METHOD 有权
    光纤OFDM接收机，光传输系统，子载波分离电路和子载波分离方法

    公开(公告)号：US20110002689A1

    公开(公告)日：2011-01-06

    申请号：US12865827

    申请日：2009-02-20

    申请人： Akihide Sano ,  Eiichi Yamada ,  Takayuki Kobayashi ,  Koichi Ishihara ,  Yutaka Miyamoto ,  Riichi Kudo

    发明人： Akihide Sano ,  Eiichi Yamada ,  Takayuki Kobayashi ,  Koichi Ishihara ,  Yutaka Miyamoto ,  Riichi Kudo

    IPC分类号： H04J14/04 ,  H04B10/06 ,  H04J14/06

    CPC分类号： H04B10/69 ,  H04L25/0305 ,  H04L25/03159 ,  H04L27/2647 ,  H04L27/2697

    摘要： A high-performance optical OFDM receiver is realized. A subcarrier separation circuit receives an optical OFDM signal consisting of two subcarriers A and B and separates a subcarrier component, signal light and first local oscillator light are input to the subcarrier separation circuit, the subcarrier separation circuit converts the signal light and the first local oscillator into a baseband electrical signal, the subcarrier separation circuit converts the baseband electrical signal into a digital signal, the subcarrier separation circuit shifts the frequency of the converted digital signal so that a center frequency of the subcarrier A becomes zero, and the subcarrier separation circuit adds a frequency shifted signal to a signal obtained by delaying the frequency shifted signal by ½ of a symbol time to separate a component of the subcarrier A.

    摘要翻译： 实现了高性能的光OFDM接收机。 子载波分离电路接收由两个子载波A和B组成的光OFDM信号，并将子载波分量，信号光和第一本地振荡光分别输入到子载波分离电路，子载波分离电路将信号光和第一本机振荡器 子载波分离电路将基带电信号转换为数字信号，副载波分离电路将转换的数字信号的频率移位，使副载波A的中心频率为零，副载波分离电路相加 频移信号到通过将频移信号延迟1/2符号时间的1/2来获得的信号，以分离副载波A的分量。