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1. 发明授权

US10644676B2 Automatic filtering method and device 有权
公开(公告)号：US10644676B2
公开(公告)日：2020-05-05
申请号：US16465761
申请日：2017-10-26
申请人： OMRON CORPORATION
发明人： Hao Zhang , Haibin Yu , Liangyong Duan , Lei Xu
IPC分类号： H03H17/02 , G01G3/147
CPC分类号： H03H17/025 , G01G3/147 , H03H17/0255
摘要： An automatic filtering method includes: a step of analyzing an input signal so as to obtain a frequency spectrum of the input signal; and a step of selecting, on the basis of the frequency spectrum, at least one filter from among a plurality of preset filters and filtering the input signal. The step of selecting includes determining, on the basis of the frequency spectrum of, a signal type in the input signal; selecting, on a basis of the signal type, a corresponding filter corresponding to the signal type; filtering the input signal with use of a first parameter of the corresponding filter and setting a second parameter for the corresponding filter on a basis of a result of the filtering; and filtering the input signal with use of the second parameter set for the corresponding filter. The method may ensure a filtering effect against noise.

2. 发明申请

US20190158132A1 RADIO COMMUNICATION RECEIVER AND METHOD FOR CONFIGURING A NOTCH FILTER OF THE RADIO COMMUNICATION RECEIVER 审中-公开
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.

3. 发明授权

US09971018B2 Interference mitigation for positioning systems 有权
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.

4. 发明申请

US20170222670A1 SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, INFORMATION PROCESSING PROGRAM AND RECORDING MEDIUM 有权
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.

5. 发明申请

US20160209493A1 INTERFERENCE MITIGATION FOR POSITIONING SYSTEMS 有权
标题翻译：定位系统干扰减轻
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。

6. 发明授权

US09214973B1 Time varying notch filter 有权
标题翻译：时变陷波滤波器
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。

7. 发明申请

US20120185525A1 Filtering Discrete Time Signals Using a Notch Filter 有权
标题翻译：使用陷波滤波器过滤离散时间信号
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。

8. 发明申请

US20090210158A1 Systems and methods to determine elastic properties of materials 有权
标题翻译：确定材料弹性性能的系统和方法
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。

9. 发明授权

US06788233B1 Digital decimation filter 有权
标题翻译：数字抽取滤波器
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。

10. 发明授权

US06611602B1 Adaptive removal of resonance-induced noise 有权
标题翻译：自适应去除谐振引起的噪声
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。

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