公开(公告)号：US20190158132A1

公开(公告)日：2019-05-23

申请号：US16306497

申请日：2016-06-15

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Kazimierz KOZIARZ ,  Erik LARSSON ,  Henrik EGNELL

IPC分类号： H04B1/10 ,  H03H17/06 ,  H03H17/02

CPC分类号： H04B1/1036 ,  H03H17/0213 ,  H03H17/0223 ,  H03H17/0227 ,  H03H17/025 ,  H03H17/06

摘要： A radio communication receiver and a method performed by the radio communication receiver for configuring a Notch filter of the radio communication receiver. The method comprises retrieving stored and previously determined filter coefficients from a set of filter coefficients, where the retrieved filter coefficients constitute a fraction of the total number of filter coefficients; and setting the rest of the filter coefficients to one. The method further comprises normalising the retrieved filter coefficients; and transforming the filter coefficients such that the Notch position ends up at the one or more frequencies to be filtered out.

公开(公告)号：US09971018B2

公开(公告)日：2018-05-15

申请号：US15637574

申请日：2017-06-29

申请人： NextNav, LLC

发明人： Norman F. Krasner

IPC分类号： H04B1/10 ,  G01S7/02 ,  G01S19/21 ,  G01S5/02 ,  H04K3/00 ,  H04B1/71 ,  H04B1/7107 ,  H03H17/02

CPC分类号： G01S7/023 ,  G01S5/0215 ,  G01S19/21 ,  H03H17/025 ,  H04B1/7101 ,  H04B1/7107 ,  H04K3/90

摘要： An interference removal filter that includes a combination of a first filter and a second filter, where the first filter passes signals over a frequency range of size B with a variation of less than +/−3 dB, where the peak value of the impulse response of the second filter is displaced in time from the peak value of the impulse response of the first filter by at least 2/B time units, and where the combination of the first filter and the second filter produces a notch in frequency at a frequency location within the frequency range.

公开(公告)号：US20170222670A1

公开(公告)日：2017-08-03

申请号：US15381132

申请日：2016-12-16

申请人： OMRON Corporation

发明人： Ziqiang XU ,  Katsufumi YOSHIDA

IPC分类号： H04B1/04 ,  H04L29/08

CPC分类号： H04B1/0475 ,  G01G23/10 ,  G05B19/054 ,  G05B2219/1161 ,  G05B2219/1176 ,  H03H17/025 ,  H03H17/0294 ,  H04L67/125

摘要： The invention relates to a signal processing device, a signal processing method, an information processing program and a recording medium, which removes wide-range frequency noise. In a signal processing device (10), a cycle of acquiring a signal from a sensor is a data acquisition cycle, which is shorter than a cycle of forwarding time sequence data from which noise is removed to a controller, that is, a forwarding cycle.

公开(公告)号：US20160209493A1

公开(公告)日：2016-07-21

申请号：US14993330

申请日：2016-01-12

申请人： NextNav, LLC

发明人： Norman F. Krasner

IPC分类号： G01S7/02

CPC分类号： G01S7/023 ,  G01S5/0215 ,  G01S19/21 ,  H03H17/025 ,  H04B1/7101 ,  H04B1/7107 ,  H04K3/90

摘要： An interference removal filter that includes a combination of a first filter and a second filter, where the first filter passes signals over a frequency range of size B with a variation of less than +/−3 dB, where the peak value of the impulse response of the second filter is displaced in time from the peak value of the impulse response of the first filter by at least 2/B time units, and where the combination of the first filter and the second filter produces a notch in frequency at a frequency location within the frequency range.

摘要翻译： 一种干扰去除滤波器，其包括第一滤波器和第二滤波器的组合，其中第一滤波器在尺寸为B的频率范围上通过小于+/- 3dB的变化的信号，其中脉冲响应的峰值 的第二滤波器的时间从第一滤波器的脉冲响应的峰值在时间上移位至少2 / B个时间单位，并且其中第一滤波器和第二滤波器的组合在频率位置处产生频率陷波 在频率范围内。

公开(公告)号：US09214973B1

公开(公告)日：2015-12-15

申请号：US13941390

申请日：2013-07-12

申请人： Marvell International Ltd.

发明人： Swaroop Venkatesh ,  Vijay Ahirwar

IPC分类号： H04B1/10 ,  H04B1/00 ,  H03H15/00 ,  H04B1/04 ,  H04B1/525

CPC分类号： H04B1/1036 ,  H03H11/04 ,  H03H17/025 ,  H03H17/0294 ,  H03H17/04 ,  H03H2011/0488 ,  H03H2015/007 ,  H04B1/001 ,  H04B1/0475 ,  H04B1/1027 ,  H04B1/109 ,  H04B1/525 ,  H04B15/02 ,  H04B15/06 ,  H04B2001/1063 ,  H04B2215/064

摘要： The present disclosure includes systems and techniques relating to time-varying notch filter. In some implementations, an apparatus includes a time-variant notch filter and a controller. The time-variant notch filter includes a notch depth and a notch bandwidth. At least one of the notch depth or the notch bandwidth is based on a coefficient of the notch filter. The controller is configured to set at least one of the notch depth to a first depth or the notch bandwidth to a first bandwidth by setting a value of the coefficient to a first value during a ramp-up of the notch filter before a packet is received. The controller is also configured to set at least one of the notch depth to a second depth or the notch bandwidth to a second bandwidth by adjusting the value of the coefficient to a second value after the packet is received.

摘要翻译： 本公开包括与时变陷波滤波器相关的系统和技术。 在一些实施方式中，一种装置包括时变陷波滤波器和控制器。 时变陷波滤波器包括陷波深度和陷波带宽。 陷波深度或陷波带宽中的至少一个基于陷波滤波器的系数。 控制器被配置为通过在接收到分组之前在陷波滤波器的斜坡上升期间将系数的值设置为第一值，将陷波深度中的至少一个设置为第一深度或陷波带宽至第一带宽 。 控制器还被配置为通过在接收到分组之后将系数的值调整为第二值，将陷波深度中的至少一个设置为第二深度或陷波带宽到第二带宽。

公开(公告)号：US20120185525A1

公开(公告)日：2012-07-19

申请号：US13265288

申请日：2010-12-04

申请人： Satya Sudhakar Yedlapalli ,  Kuchibhotla Venkata Subrahmanya Hari

发明人： Satya Sudhakar Yedlapalli ,  Kuchibhotla Venkata Subrahmanya Hari

IPC分类号： G06F17/10

CPC分类号： H03H17/025 ,  G01S1/76 ,  G01S3/805 ,  H03H17/0285 ,  H03H2017/0298 ,  H03H2218/04

摘要： Various techniques are generally described for digital signal processing (DSP) such as discrete time filters. In some examples, a Canonic Filter Module (CFM) can be used to configure the discrete time filter using an LSF-Model with a finite length sequence. A single CFM can be configured to provide any type of discrete time filter used in signal processing. Filters can be modeled as a set of interconnected notch filters, a lattice structure of a discrete time filter is generally described that is based on a LSF-Model.

摘要翻译： 通常描述用于诸如离散时间滤波器的数字信号处理（DSP）的各种技术。 在一些示例中，可以使用Canonic Filter Module（CFM）来配置具有有限长度序列的LSF-Model的离散时间过滤器。 单个CFM可以配置为提供用于信号处理的任何类型的离散时间滤波器。 滤波器可以被建模为一组互连的陷波滤波器，通常描述基于LSF模型的离散时间滤波器的格子结构。

公开(公告)号：US20090210158A1

公开(公告)日：2009-08-20

申请号：US12383390

申请日：2009-03-23

申请人： Peter Thomas German

发明人： Peter Thomas German

IPC分类号： G06F19/00 ,  G01L1/00

CPC分类号： H03H17/025 ,  G01N3/30 ,  G01N3/48 ,  G01N2203/0051 ,  G01N2203/0075 ,  G01N2203/0218 ,  G01N2291/02827

摘要： The present invention provides systems and methods to use a measured driving-point response of a nonlinear material to determine one or more elastic properties of the material. The present invention takes advantage of the full information represented by the transient component, the steady-state component, the anharmonic components, and the nonlinear response components of a measured driving-point response of a real nonlinear material, without limitation in the use of large-amplitude forces. The elastic properties are determined by forming and solving a time-domain system of linear equations representing a differential equation model of the driving-point motions of the material. Based on a single, short duration, large-amplitude driving point measurement, both linear and nonlinear properties can be determined; both large-amplitude and near-zero amplitude properties can be determined; and elastic-wave speed and elastic moduli and their variation with depth can be determined.

摘要翻译： 本发明提供了使用非线性材料的测量的驱动点响应来确定材料的一个或多个弹性特性的系统和方法。 本发明利用由实际非线性材料的测量的驱动点响应的瞬态分量，稳态分量，非调谐分量和非线性响应分量所表示的全部信息，而不限于使用大的 幅度力 通过形成和求解表示材料的驱动点运动的微分方程模型的线性方程的时域系统来确定弹性特性。 基于单个，短持续时间的大幅度驱动点测量，可以确定线性和非线性特性; 可以确定大振幅和近零幅度特性; 可以确定弹性波速度和弹性模量及其与深度的变化。

公开(公告)号：US06788233B1

公开(公告)日：2004-09-07

申请号：US10642420

申请日：2003-08-15

申请人： Vincent Quiquempoix ,  Gabriele Bellini ,  Jerry Collings

发明人： Vincent Quiquempoix ,  Gabriele Bellini ,  Jerry Collings

IPC分类号： H03M300

CPC分类号： H03H17/0664 ,  H03H17/025 ,  H03H17/0283 ,  H03H17/0294

摘要： A digital decimation filter with programmable frequency notches is disclosed. The digital decimation filter performs integration, differentiation, and scaling to produce a filtered output signal. The differentiation is preformed by a programmable counter. The filter has a control unit that controls the behavior of the filter. The control unit has registers to contain ther values of the frequency notches of the filter. The control unit activates the differentiator based on the value of the frequency notches in order to achieve filtration. The scaling unit uses a register, a bit shifter, and an adder to minimize complexity. The digital decimation filter provides high rejection with low complexity.

摘要翻译： 公开了一种具有可编程频率切口的数字抽取滤波器。 数字抽取滤波器执行积分，微分和缩放以产生滤波的输出信号。 微分是由可编程计数器执行的。 过滤器具有控制单元，用于控制过滤器的行为。 控制单元具有寄存器以包含滤波器的频率缺口的值。 控制单元基于频率凹口的值激活微分器以实现过滤。 缩放单元使用寄存器，位移器和加法器来最小化复杂度。 数字抽取滤波器具有低复杂度的高抑制。

公开(公告)号：US06611602B1

公开(公告)日：2003-08-26

申请号：US09324998

申请日：1999-06-02

申请人： Stanley A. White ,  Jeffrey P. Woodard ,  Michael Alan Soderstrand ,  Karl Einar Nelson ,  Phong Vu Nguyen Dao

发明人： Stanley A. White ,  Jeffrey P. Woodard ,  Michael Alan Soderstrand ,  Karl Einar Nelson ,  Phong Vu Nguyen Dao

IPC分类号： H03G500

CPC分类号： H03H17/0294 ,  H03H17/025 ,  H03H17/0288 ,  H03H17/04 ,  H03H2017/0297

摘要： Noise is removed from the digitized output of a sensor, subject to undesired resonance, even when the resonant frequency is unknown or drifts, with sufficiently low phase delay for the sensor to be used in closed-loop control. A very narrow notch filter which removes the resonance-induced noise is recursive (IIR) and therefore has a low phase delay. However, the apparatus which determines the center frequency of the notch filter is non-recursive, and therefore stable. It includes a tunable FIR filter which tracks the same resonance that we wish the IIR filter to remove. Tuning the FIR filter to minimize the output of the FIR filter therefore tunes the notch frequency to align with the resonant frequency. The tuning parameter which adaptively produces this result is suitably scaled and biased, and is applied to the IIR filter.

摘要翻译： 即使谐振频率未知或漂移，即使传感器用于闭环控制的相位延迟足够低，噪声也会从传感器的数字化输出中消失。 去除谐振感应噪声的非常窄的陷波滤波器是递归的（IIR），因此具有低相位延迟。 然而，确定陷波滤波器的中心频率的装置是非递归的，因此是稳定的。 它包括一个可调FIR滤波器，跟踪我们希望IIR滤波器去除的相同谐振。 调谐FIR滤波器以最小化FIR滤波器的输出，因此调谐陷波频率与谐振频率对齐。 自适应地产生该结果的调谐参数被适当地缩放和偏置，并且被应用于IIR滤波器。

公开(公告)号：US5576976A

公开(公告)日：1996-11-19

申请号：US116860

申请日：1993-09-07

申请人： Stanley A. White

发明人： Stanley A. White

IPC分类号： H03H17/02 ,  H03H17/00

CPC分类号： H03H17/025 ,  H03H17/02

摘要： An accurate estimate of the amplitude of a sparsely sampled sinusoidal signal is obtained by filtering the squares of the sampled values of the sinusoidal signal with an adjustable notch filter in order to remove a double-frequency component at twice the frequency of the sinusoidal signal. This amplitude estimate, for example, is used for automatic gain control of the amplitude of the sinusoidal signal. Preferably, the notch filter is a digital filter for computing an output signal (v) from successive samples (x.sub.n, x.sub.n-1, x.sub.n-2) of an input signal (x) according to: v.sub.n =x.sub.n -.beta.x.sub.n-1 +x.sub.n-2. The frequency control parameter (.beta.) is computed, so as to automatically track the frequency of the sinusoidal signal, by integrating a product of a derivative (x.sub.n-1 -x.sub.n-2) of the input signal (x) and a derivative (v.sub.n -v.sub.n-1) of the filtered signal (v).

摘要翻译： 通过用可调陷波滤波器对正弦信号的采样值的平方进行滤波，以便以正弦信号的两倍频率去除双频分量来获得对稀疏采样的正弦信号的振幅的精确估计。 例如，该幅度估计用于正弦信号幅度的自动增益控制。 优选地，陷波滤波器是用于根据以下的输入信号（x）的连续采样（xn，xn-1，xn-2）计算输出信号（v）的数字滤波器：vn = xn-βxn-1 + xn-2。 计算频率控制参数（β），以通过将输入信号（x）的导数（xn-1-xn-2）和导数（vn）的乘积积分，来自动跟踪正弦信号的频率 -vn-1）的滤波信号（v）。