公开(公告)号：US4674125A

公开(公告)日：1987-06-16

申请号：US596817

申请日：1984-04-04

申请人： Curtis R. Carlson ,  James H. Arbeiter ,  Roger F. Bessler

发明人： Curtis R. Carlson ,  James H. Arbeiter ,  Roger F. Bessler

IPC分类号： G01R23/167 ,  G06F17/10 ,  H04N7/26 ,  G06K9/54

CPC分类号： H04N19/63 ,  G01R23/167 ,  G06F17/10

摘要： Pipe-line architecture is employed for analyzing in delayed real time the frequency spectrum of an information component (having one or more dimensions) of a given temporal signal having a highest frequency of interest of no greater than f.sub.0, and/or for synthesizing in delayed real time such a temporal signal from the analyzed frequency spectrum thereof. Such pipe-line architecture is particularly suitable for image-processing the two-dimensional spatial frequencies of television images defined by a temporal video signal.

摘要翻译： 采用管线架构来延迟实时分析具有不大于f0的最高感兴趣频率的给定时间信号的信息分量（具有一个或多个维度）的频谱和/或用于在延迟时间 来自其分析频谱的实时时间信号。 这种管线结构特别适用于对由时间视频信号定义的电视图像的二维空间频率进行图像处理。

公开(公告)号：US4348735A

公开(公告)日：1982-09-07

申请号：US162262

申请日：1980-06-23

申请人： David Hertz ,  Robert P. Kurshan ,  David Malah

发明人： David Hertz ,  Robert P. Kurshan ,  David Malah

IPC分类号： G01R23/167 ,  H03H17/02 ,  G06F15/31

CPC分类号： H03H17/02 ,  G01R23/167

摘要： A system (1000) for estimating the frequency of a tone input utilizes sample rate reduction in successive stages and processing by digital cyclotomic filters at each stage. The tone input (2001) is first transformed in network (1100) to yield two quadrature tones. Digitizer (1200) converts the two tones into data words. Buffer (1300) comprises two essentially identical storage arrangments wherein data words are stored and then supplied to succeeding stages. Frequency-shifting unit (1400) effects modulus-one multiplication by processing appropriately selected data words. Word pairs and frequency-shifted versions thereof are processed by cyclotomic filters (1500). Sequential decimation in the system effects a successively refined estimate to the tonal frequency. During each stage of decimation, the filters are configured to provide symmetric coverage of the subband containing the estimate. Configuration information is provided by decision unit (1600) via threshold comparison of the outputs from the filters and controller (1700) provides control information to the elements of the system. Rate reduction occurs on a 4:1 basis for each stage of decimation. The first frequency interval covered is one-fourth the initial sampling rate, and each stage of decimation causes a factor of four refinement in the estimate. The filters are structured as the equivalent of four filter pairs at each stage of decimation; two of the four pairs are of first order, whereas the other two are of second order.

摘要翻译： 用于估计音调输入频率的系统（1000）在连续的阶段中使用采样率降低，并且在每个阶段利用数字循环滤波器进行处理。 音调输入（2001）首先在网络（1100）中变换以产生两个正交音调。 数字转换器（1200）将两个音调转换为数据字。 缓冲器（1300）包括两个基本上相同的存储布置，其中存储数据字，然后提供给后续级。 频移单元（1400）通过处理适当选择的数据字来影响模数一乘法。 字对及其频移版本由循环滤波器（1500）处理。 系统中的顺序抽取对音调频率产生了连续精确的估计。 在抽取的每个阶段期间，滤波器被配置为提供包含估计的子带的对称覆盖。 配置信息由决策单元（1600）通过来自滤波器的输出的阈值比较提供，并且控制器（1700）将控制信息提供给系统的元件。 降频发生在每个抽取阶段的4比1。 覆盖的第一个频率间隔是初始采样率的四分之一，并且每个抽取阶段在估计中导致四个细化因子。 滤波器在抽取的每个阶段被构造为等效于四个滤波器对; 四对中的两个是第一顺序，而另外两个是二阶。

公开(公告)号：US4093989A

公开(公告)日：1978-06-06

申请号：US747053

申请日：1976-12-03

申请人： Joseph H. Flink ,  John Bertrand

发明人： Joseph H. Flink ,  John Bertrand

IPC分类号： G01R23/167 ,  G06F15/34 ,  G01R23/16

CPC分类号： G01R23/167

摘要： A spectrum analyzer using digital filters for providing third octave spectrum analysis comprises means for breaking up input information into a plurality of digital data blocks, each block being of a given time duration and being within respective frequency ranges, means for weighting the information contained in the data blocks and means for digitally filtering the weighted digital data blocks with digital filtering devices having at least one center frequency falling within the frequency range represented by each of the data blocks, each of the data blocks comprising N samples satisfying the following equation- N >Kf.sub.o/ B.sub.n Where K is a constant which is a function of the sampling rate and the falloff rate of the skirt of filter characteristic, B.sub.n is the filter bandwidth and f.sub.o is the center frequency of the filter.

摘要翻译： 使用用于提供第三倍频程频谱分析的数字滤波器的频谱分析仪包括用于将输入信息分解成多个数字数据块的装置，每个块具有给定的持续时间并且在相应的频率范围内，用于对包含在 数据块和装置，用数字滤波装置数字滤波加权的数字数据块，数字滤波装置具有落在由每个数据块表示的频率范围内的至少一个中心频率，每个数据块包括满足以下等式的N个样本-N> Kfo / Bn其中K是一个常数，它是滤波器特性的裙边的采样率和衰减速率的函数，Bn是滤波器带宽，fo是滤波器的中心频率。

公开(公告)号：US4084245A

公开(公告)日：1978-04-11

申请号：US714103

申请日：1976-08-13

申请人： Ernst Bunge

发明人： Ernst Bunge

IPC分类号： G10L15/10 ,  G01H3/00 ,  G01H3/08 ,  G01R23/165 ,  G01R23/167 ,  G10L15/02 ,  G10L1/04

CPC分类号： G01R23/165

摘要： An arrangement for signal analysis in which the function to be examined is split into its spectral components in a filter bank. The signal values of the individual components are successively applied to a comparison device and to the input of a store. The output of the store feeds the other input of the comparison device which generates a signal whenever the instantaneous signal values of all spectral components correspond to the stored, corresponding signal values, within predetermined tolerance limits. The successful comparison of each time a pair of signal values is counted for all spectral components, and the output signal is generated only if a predetermined counter position is reached. As a result, complete correspondence is not required. An additional pulse generator can also generate pulses for given spectral components which correspond to a successful comparison. The directly successive pulses of the comparison device are counted, and in the case of a negative overall comparison this counter position is transferred to a histogram-forming device which separately counts the numbers of the various counter positions.

公开(公告)号：US20230341449A1

公开(公告)日：2023-10-26

申请号：US17727371

申请日：2022-04-22

申请人： Rohde & Schwarz GmbH & Co. KG

发明人： Denis Petrovic ,  Andreas Oeldemann ,  Felix Haberstroh ,  Nico Toender ,  Cornelius Kaiser

IPC分类号： G01R23/167

CPC分类号： G01R23/167

摘要： A digital filter for processing at least one input signal is described. The digital filter includes at least two filter parts that are separately formed from each other. The at least two filter parts are configured to process the at least one input signal in parallel which is received by the digital filter. A first filter part of the at least two filter parts is implemented in a first chip. A second filter part of the at least two filter parts is implemented in a second chip. Further, a measurement instrument is described.

公开(公告)号：US20230096249A1

公开(公告)日：2023-03-30

申请号：US17934016

申请日：2022-09-21

申请人： ANRITSU CORPORATION

发明人： Hiroaki IIDA ,  Koki IWATA ,  Kayoko HORIUCHI

IPC分类号： G01R29/08 ,  G01R23/167 ,  G01R23/06 ,  H04B17/17

摘要： A measurement system and method tests for spurious emissions included in a signal transmitted from a mobile terminal in a shorter time than before. The system includes: a band division unit for dividing the measurement frequency band into a plurality of divided bands; a first spurious measurement control unit which causes a measurement device to measure the spurious emissions of the signal to be measured in each divided band and the peak power of the spear in each divided band; and a first pass/fail determination unit that determines whether or not pass determination criteria is satisfied. The first pass/fail determination unit determines whether the peak power does not exceed the threshold of the pass determination criteria in each divided band. The threshold value of the pass determination criteria is lower than the threshold of the standard determination criteria defined by the 3GPP standard.

公开(公告)号：US20220365121A1

公开(公告)日：2022-11-17

申请号：US17741674

申请日：2022-05-11

申请人： Siemens Aktiengesellschaft

发明人： Marco BÖGLER ,  Jürgen ZETTNER

IPC分类号： G01R23/167

摘要： A method for monitoring the status of an apparatus, wherein an analog signal is converted into a digital signal with an analog-digital converter operating within a measuring range, signal portions of the analog signal extending beyond the measuring range are cut in the digital signal, a spectral analysis is applied to the digital signal to determine which frequency potions the analog signal possesses in a frequency spectrum and conclude a malfunction of the apparatus when the analog signal exceeds the measuring range, where when the analog signal extending beyond the measuring range is in the digital signal, this event is detected and determined as a number, where a signal quality is provided which is used to assess whether known damage frequencies can still be identified from determined frequency portions of the frequency spectrum, although additional overcontrol portions in the frequency spectrum occur as a result of possibly cut signal portions.

公开(公告)号：US20210080493A1

公开(公告)日：2021-03-18

申请号：US17107767

申请日：2020-11-30

申请人： Resonant, Inc.

发明人： Richard Silver

IPC分类号： G01R23/167 ,  G06F30/36

摘要： A method of designing a filter to meet a set of specifications. The set of specifications is received, and a filter design is established. Analysis of the filter design is performed by: determining a part admittance matrix; determining a circuit admittance matrix based on the part admittance matrices; reducing interior nodes of the circuit admittance matrix; reducing algebraic nodes to transform the circuit admittance matrix into a Green's Function; evaluating the Green's Function to determine a circuit exterior node admittance matrix; and transforming the circuit exterior node admittance matrix to a circuit scattering matrix. The circuit scattering matrix is compared to the set of specifications to determine whether the filter design is satisfactory. When a determination is made that the design is not satisfactory, the filter design is modified and the process is repeated. When a determination is made that the design is satisfactory, a filter design description is output.

公开(公告)号：US10901017B2

公开(公告)日：2021-01-26

申请号：US15673302

申请日：2017-08-09

申请人： NVIDIA CORPORATION

发明人： Sunil Sudhakaran

IPC分类号： G01R23/167 ,  G06F17/12 ,  G01R31/28 ,  G01R29/26

摘要： Embodiments of the present invention reconstruct a waveform at a receiver-end of a channel from an observed waveform physically measured at a probe point near the middle of the channel, where the channel is corrupted by reflections. The channel may be a memory channel of a high-speed I/O interface, for example. Equations to derive the waveform may be created using linear network analysis and/or signal processing, for example. S-parameters may be derived from simulated models representing components from the probe point to the load. The s-parameters together with the load impedance are used to recreate the desired waveform free from corruption due to reflections.

公开(公告)号：US20200379024A1

公开(公告)日：2020-12-03

申请号：US16871664

申请日：2020-05-11

申请人： INNOWIRELESS CO., LTD.

发明人： Young Su KWAK ,  Kyoung Hwan JU

IPC分类号： G01R23/173 ,  G01R23/167

摘要： A spectrum analyzer having a memory function to adopt a digital-data-based frequency sweep scheme while achieving performance comparable to performance of a high-speed FFT spectrum analyzer, and a method of controlling the spectrum analyzer, in which the spectrum analyzer includes: an ADC for converting a BWP signal, which is at least one analog unit frequency band signal, into a digital data sample at a predetermined sample rate according to a span set by a user; a digital sweep part for sweeping the data sample passed through the ADC while digitally decimating the data sample through a decimation processing block having a two-stage cascaded structure, and processing the swept data sample to increase a frequency sweep speed; and a control unit for controlling the digital sweep part according to various items input, set, and selected by the user to perform spectrum analysis and output a spectrum analysis result.