知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

1326 条记录 (耗时 0.029 秒)

    METHOD OF PERFORMING REAL TIME DECOMPOSITION OF A SIGNAL INTO COMPONENTS
    41.
    发明申请
    METHOD OF PERFORMING REAL TIME DECOMPOSITION OF A SIGNAL INTO COMPONENTS 有权

    公开(公告)号：US20170111031A1

    公开(公告)日：2017-04-20

    申请号：US15292323

    申请日：2016-10-13

    申请人： ROLLS-ROYCE plc

    发明人： Lily RACHMAWATI ,  Eng Yeow CHEU ,  Anna SWIDER ,  Martijn DE JONGH ,  Eivind VINJE

    IPC分类号： H03H21/00

    CPC分类号： H03H21/0027 ,  B63J2099/006 ,  G06F17/10 ,  H03H21/002

    摘要： The invention is a method that combines the following components: 1. a high pass filter designed to have sufficiently small phase delay and roll-off value in transition band as well as sufficiently good attenuation; 2. a distortion detection and reconstruction introduced by the application of the high pass filter by extraction the significant frequency components in relevant frequency band; 3. a signal compensation that reshapes the output of the high pass filter by matching the filter's phase delay and attenuation characteristics so as to approximate low frequency component extraction that would be produced by an ideal filter (very sharp frequency transition and no delay); 4. a time-domain detection and correction method that addresses special circumstances under which the compensation would be inaccurate to achieve real-time estimate in normal circumstances, and 5. a time-domain correction method during and immediately after sudden changes in composite signal (spike) is detected.

    Systems and methods for an adjustable filter engine
    42.
    发明授权
    Systems and methods for an adjustable filter engine 有权

    公开(公告)号：US09621131B2

    公开(公告)日：2017-04-11

    申请号：US14282798

    申请日：2014-05-20

    申请人： Semiconductor Components Industries, LLC

    发明人： Chihsin Wu

    IPC分类号： G06F17/10 ,  H03H21/00 ,  H03H17/02

    CPC分类号： H03H21/0012 ,  H03H17/0294

    摘要： Systems and methods are provided for an adjustable filter engine. In particular, an electronic system is provided that can include a focus module, memory, and control circuitry. In some embodiments, the focus module can include an adjustable filter engine and a motor. By using the adjustable filter engine to generate a filter with a large number of filter coefficients, the control circuitry can accommodate a variety of system characteristics. For example, by generating a set of cumulative coefficients and re-arranging the order of the cumulative coefficients, the control circuitry can reduce the bit-width requirements of the adjustable filter engine hardware. For instance, the control circuitry can reduce the number of multipliers required to perform a convolution between an updated filter and one or more input signals. In some embodiments, the updated filter can be generated to reduce oscillations of the motor movement due to a new position request.

    ESTIMATING SECONDARY PATH PHASE IN ACTIVE NOISE CONTROL
    43.
    发明申请
    ESTIMATING SECONDARY PATH PHASE IN ACTIVE NOISE CONTROL 有权
    估计主动噪声控制中的二次路段

    公开(公告)号：US20170077906A1

    公开(公告)日：2017-03-16

    申请号：US14855961

    申请日：2015-09-16

    申请人： Bose Corporation

    发明人： Paraskevas Argyropoulos ,  Emery M. Ku

    IPC分类号： H03H21/00

    CPC分类号： H03H21/0012 ,  G10K11/178 ,  G10K2210/1282 ,  G10K2210/30232 ,  G10K2210/3044 ,  G10K2210/3056

    摘要： The technology described in this document can be embodied in a computer-implemented method that includes receiving, by one or more processing devices, a first plurality of values representing a set of coefficients of an adaptive filter disposed in an active noise cancellation system. The method also includes accessing one or more estimates of instantaneous phase values associated with a transfer function representing an effect of a secondary path of the active noise cancellation system, and updating the first plurality of values based on the one or more estimates of the instantaneous phase values to generate a set of updated coefficients for the adaptive filter. The method further includes programming the adaptive filter with the set of updated coefficients to affect operation of the adaptive filter.

    摘要翻译： 本文档中描述的技术可以体现在计算机实现的方法中，该方法包括由一个或多个处理设备接收表示设置在主动噪声消除系统中的自适应滤波器的一组系数的第一多个值。 该方法还包括访问与表示有源噪声消除系统的辅助路径的影响的传递函数相关联的瞬时相位值的一个或多个估计，以及基于瞬时相位的一个或多个估计来更新第一多个值 值以产生用于自适应滤波器的一组更新的系数。 所述方法还包括用所述一组更新的系数编程所述自适应滤波器以影响所述自适应滤波器的操作。

    Signal processing method and device
    45.
    发明授权
    Signal processing method and device 有权
    信号处理方法及装置

    公开(公告)号：US09543926B2

    公开(公告)日：2017-01-10

    申请号：US12751570

    申请日：2010-03-31

    申请人： Miki Sato ,  Akihiko Sugiyama

    发明人： Miki Sato ,  Akihiko Sugiyama

    IPC分类号： G10L21/0208 ,  H03H21/00 ,  G10L21/0216

    CPC分类号： H03H21/0012 ,  G10L21/0208 ,  G10L2021/02165 ,  H03H2021/0078

    摘要： A signal processor includes: a first adaptive filter that takes a first signal as input and generates a first pseudo signal; a first subtractor that subtracts the first pseudo signal from a second signal to supply a first differential signal as output; a second adaptive filter that takes the first signal as input to generate a second pseudo signal; a second subtractor that subtracts the second pseudo signal from the second signal to supply a second differential signal as output; a first step size control circuit that generates a first step size used in updating the first adaptive filter in accordance with the relation between the second pseudo signal and the second differential signal; and a second step size control circuit that generates a second step size used in updating the second adaptive filter in accordance with the relation between the first signal and the second signal.

    摘要翻译： 信号处理器包括：第一自适应滤波器，其将第一信号作为输入并产生第一伪信号; 第一减法器，从第二信号中减去第一伪信号以提供第一差分信号作为输出; 第二自适应滤波器，其将第一信号作为输入产生第二伪信号; 第二减法器，从第二信号中减去第二伪信号，以提供第二差分信号作为输出; 第一步长控制电路，根据第二伪信号与第二差分信号之间的关系产生用于更新第一自适应滤波器的第一步长; 以及第二步长控制电路，其根据第一信号和第二信号之间的关系产生用于更新第二自适应滤波器的第二步长。

    Selecting of a pre-filter in a receiver of a communication system
    46.
    发明授权
    Selecting of a pre-filter in a receiver of a communication system 有权
    在通信系统的接收机中选择预滤波器

    公开(公告)号：US09515634B1

    公开(公告)日：2016-12-06

    申请号：US15044690

    申请日：2016-02-16

    申请人： Marvell International Ltd.

    发明人： Kok-Wui Cheong

    IPC分类号： H03H17/02 ,  H04B1/10 ,  H03H21/00

    CPC分类号： H04B1/10 ,  H03H21/0001

    摘要： Embodiments provide a receiver comprising an input coupled to a communication channel for receiving an input signal from the communication channel, a first processing filter coupled to the input, and a first level estimation module coupled to the first processing filter to estimate a first level of the input signal based upon the first processing filter. The receiver further comprises a second processing filter coupled to the input, a second level estimation module coupled to the second processing filter to estimate a second level of the input signal based upon the second processing filter, and a control module coupled to (i) the first level estimation module and (ii) the second level estimation module, wherein the control module includes logic configured to select an analog pre-filter for the input signal based upon (i) the first level of the input signal and (ii) the second level of the input sign.

    摘要翻译： 实施例提供了一种接收机，其包括耦合到通信信道的输入，用于从通信信道接收输入信号，耦合到输入的第一处理滤波器和耦合到第一处理滤波器的第一级估计模块，以估计第一级 基于第一处理过滤器的输入信号。 所述接收机还包括耦合到所述输入端的第二处理滤波器，耦合到所述第二处理滤波器的第二级估计模块，以基于所述第二处理滤波器估计所述输入信号的第二电平;以及控制模块，其耦合到（i） 第一级估计模块和（ii）第二级估计模块，其中控制模块包括被配置为基于（i）输入信号的第一级选择输入信号的模拟预滤波器的逻辑，以及（ii）第二级估计模块 级别的输入符号。

    Frequency-adaptive notch filter
    47.
    发明授权
    Frequency-adaptive notch filter 有权

    公开(公告)号：US09503056B2

    公开(公告)日：2016-11-22

    申请号：US14921039

    申请日：2015-10-23

    申请人： Welch Allyn, Inc.

    发明人： Yaolong Lou ,  Yong Sern Gwee ,  Peter Glocker

    IPC分类号： G06F17/10 ,  H03H21/00 ,  A61B5/0402 ,  A61B5/00 ,  A61B5/04

    CPC分类号： H03H21/0021 ,  A61B5/04017 ,  A61B5/0402 ,  A61B5/7203 ,  A61B5/725 ,  A61B2560/0475

    摘要： One apparatus includes a notch filter that has a state observer unit and a parameter adaptation unit. The state observer unit is configured to receive a sampled noisy electrical signal and a sampled filtered electrical signal, the state observer unit having an estimated noise signal output, the estimated noise signal output carrying an estimated noise signal to be subtracted from the sampled noisy electrical signal, resulting in the filtered electrical signal. The parameter adaptation unit is configured to receive the estimated noise signal and an error signal from the state observer unit. The parameter adaptation unit is also configured to determine, based on the estimated noise signal and the error signal, an updated estimated noise frequency, thereby causing the state observer unit to generate an updated estimated noise signal to be provided on the estimated noise signal output.

    Passive equalizer
    50.
    发明授权
    Passive equalizer 有权
    被动均衡器

    公开(公告)号：US09401688B2

    公开(公告)日：2016-07-26

    申请号：US14422770

    申请日：2012-12-10

    申请人： MATSUE ELMEC CORPORATION

    发明人： Masaaki Kameya

    IPC分类号： H04B3/04 ,  H03H1/02 ,  H04B3/14 ,  H04L25/03 ,  H03H21/00 ,  H04B7/005

    CPC分类号： H03H1/02 ,  H03H21/0001 ,  H04B3/04 ,  H04B3/14 ,  H04B7/005 ,  H04L25/03 ,  H04L25/03878

    摘要： A first meander line 1A is formed on one surface of a first dielectric layer 9A, with one end as a signal input position, and the other end connected to a first termination resistance 5A, and a second meander line 1C facing the first meander line 1A is formed on a surface facing the first dielectric layer 9A, and the second meander line 1C is formed, with one end positioned at the other end side of the first meander line 1A as a signal output position, and the other end connected to a second termination resistance 5C, and a first conductor line 3A is formed on the side facing the first dielectric layer 9A, with one end connected to the signal input position and the other connected to the signal output position, and a dividing section in a middle of the first conductor line 3A is connected by a first series resistance 7A.

    摘要翻译： 第一曲折线1A形成在第一电介质层9A的一个表面上，其一端作为信号输入位置，另一端连接到第一终端电阻5A，第二曲折线1C面对第一曲折线1A 形成在面向第一电介质层9A的表面上，形成第二曲折线1C，其一端位于第一曲折线1A的另一端侧作为信号输出位置，另一端连接到第二 终端电阻5C，第一导线3A形成在面向第一电介质层9A的一侧，其一端连接到信号输入位置，另一端连接到信号输出位置，另一端连接到信号输出位置， 第一导线3A由第一​​串联电阻7A连接。