Description: Rotating shafts experience a an elliptical motion called whirl. It is important to decompose this motion into a forward and backward whil orbits. The current function makes use of two sensors to generate a bi-directional spectrogram. The method can be extended to any time-frequency distribution
％
％ compute the forward/backward Campbell/specgtrogram
％
％ INPUT:
％ y (n x 2) each column is measured from a different sensor
％ ///////
％ __
％ |s1| y(:,1)
％ |__|
％ __
％ / \\ ________|/
％ | | | s2 |/ y(:,2)
％ \\____/ --------|/
％
％ Fs Sampling frequnecy
％
％ OUTPUT:
％ B spectrogram/Campbel diagram
％ x x-axis coordinate vector (time or Speed)
％ y y-axis coordinate vector (frequency [Hz])
-an experience a elliptica l motion called whirl. It is important to decomp Rose this motion into a forward and backward whil orbits. The current function makes use of two se nsors to generate a bi-directional spectrogra m. The method can be extended to any time-freque ncy distribution% compute the forward / backw ard Campbell / specgtrogram% INPUT : % y (n x 2) each column is measured from a differen t sensor ///////%%% __ | s1 | y (:, 1)% | __ |%% __ / \\ ________|/% | | | s2 | / y (:, 2)% \\ ___/_____/20__ --------|/% Fs Sampling frequnecy %% OUTPUT : spectrogram% B / Campbel diagram% x x-axis coor dinate vector (time or Speed)% y y-axis coordin ate vector (frequency [Hz]) Platform: |
Size: 62056 |
Author:yupenghui |
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Description: 时频分布显示源代码.适合于非稳态的时频联合分析,可直接用于MATLAB编程,无解压密码.-time-frequency distribution shows that the source code. Suited to the non-steady-state joint time-frequency analysis can be used directly in MATLAB programming, without extracting passwords. Platform: |
Size: 5120 |
Author:王杜 |
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Description: 这个是全部的matlab下的时频分布在故障诊断中的运用的代码-This is all the Matlab under the time-frequency distribution in fault diagnosis on the use of code Platform: |
Size: 3072 |
Author:tanhang |
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Description: 这是关于时频分析的Wigner-Ville分布的完美程序,仿真出来的分布很好很完美,欢迎下载.-This is the time-frequency analysis of the Wigner-Ville distribution of a perfect process, Simulation of the distribution are very good, and very perfect, welcomed download. Platform: |
Size: 25600 |
Author:程艳花 |
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Description: 科恩著“时_频分析:理论与应用”该书全面系统地阐述了时-频分析的理论与应用。全书共分19章，主要内容有：时间分析、频率分析、尺度分析、时间-带宽关系；瞬时频率；密度和局部量；短-时傅里叶变换；时-频分析；魏格纳分布；时-频表示；计算方法；综合问题；空间/空间-频率表示；时间尺度表示；算子；一般联合表示；随机信号和高阶时-频分布。每一个概念都有举例说明，而且还给出了这些方法如何推广到其它的变量，如尺度等。
西安交通大学出版社-Cohen book when _-frequency analysis: Theory and Applications The book comprehensively and systematically elaborated on when- frequency analysis of the theory and application. Book is divided into 19 chapters, the main elements are: time analysis, frequency analysis, scale analysis, the time- bandwidth relations instantaneous frequency density and local capacity short- when the Fourier transform time- frequency analysis Wigner distribution time- frequency representation calculation method integrated problem space/space- the frequency of express time scales express operator general joint express random signal and high-order time- frequency distribution. Each have examples of a concept, but also how these methods are given to other variables, such as the scale and so on. Xi an Jiaotong University Press Platform: |
Size: 6445056 |
Author:宋知用 |
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Description: 本程序是自适应核分布时频分布的演示程序，可以对信号进行时频分析，主程序matlab开发，核心算法是c++语言的。-This procedure is the adaptive time-frequency distribution of nuclear distribution of the demo program can be time-frequency signal analysis, matlab main program development, the core algorithm is c++ Language. Platform: |
Size: 137216 |
Author:于鹏 |
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Description: 时频分布中交叉项抑制的研究进展.pdf-详细介绍了交叉项抑制的几种实用的方法。-Time-frequency distribution in the cross-term suppression of research. Pdf-detailed information on cross-term suppression of several practical approach. Platform: |
Size: 359424 |
Author:z |
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Description: 关于时频分布的跳频信号参数检测方法研究，短时傅立叶变换、魏格纳变换等-On the time-frequency distribution of the frequency-hopping signal detection parameters, short-time Fourier transform, Wigner-Ville transform, etc. Platform: |
Size: 1995776 |
Author:hehha |
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Description: 时间序列的时频特性分析研究时间序列的傅里叶变换及逆变换，快速梅林变换及逆变换，短时离散傅里叶变换，得到瞬时频率。
研究时间序列的Born–Jondan时频分布图，Butterworth时频分布图，Choi–Williams时频分布图，得到瞬时频率。
-Time series analysis of time-frequency characteristics of time series of Fourier transform and inverse transform, the fast Mellin transform and inverse transform, short time discrete Fourier transformation, the instantaneous frequency. Of time series of Born-Jondan time-frequency distribution, Butterworth frequency distribution, Choi-Williams time-frequency map, get instantaneous frequency. Platform: |
Size: 15360 |
Author:李倩 |
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Description: 介绍了常见的时频分析方法，包括短时傅里叶变换，Wigner-Ville分布以及小波变换等，结合MATLAB，引导读者如何运用其来进行时频分析-Describes the common time-frequency analysis methods, including short time Fourier transform, Wigner-Ville distribution and wavelet transform, combined with MATLAB, to guide the reader how to use it to carry out time-frequency analysis Platform: |
Size: 11590656 |
Author:李松寒 |
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Description: 时频分析工具箱中提供了计算各种线性时频表示和双线性时频分布的函数， 本帖主要列出时频分析工具箱函数简介，以号召大家就时频分析应用展开相关讨论。-Time-frequency analysis toolbox frequency representation in the calculation of a variety of linear and bilinear time-frequency distribution function, this is mainly listed Frequency Analysis Toolbox function profile, with a call to the time-frequency analysis application to expand discussions . Platform: |
Size: 2741248 |
Author:杨初 |
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Description: 时频分析工具箱中提供了计算各种线性时频表示和双线性时频分布的函数-Time-frequency analysis toolkit provides the calculation of linear time-frequency representation and bilinear time-frequency distribution function Platform: |
Size: 56320 |
Author:虫虫 |
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Description: 时频分布已被用来提供高分辨率表示大量的信号处理应用程序。然而,高分辨率和准确瞬时频率(如果)估计通常依赖于分布和使用信号相位函数的复杂性。-The time-frequency distribution has already been used to provide high resolution said a lot of signal processing applications. However, high resolution and accurate instantaneous frequency (if) estimates usually depends on the distribution and use of the complexity of the signal phase function. Platform: |
Size: 248832 |
Author:Rose |
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Description: Matlab source code for all of time frequency distribution: choi-Williams, short time fourier transform, Wigner Ville, Hilbert,.... Clear explain in english. All source code have been tested and WORKED!!!!! Platform: |
Size: 5809152 |
Author:lonelyghost198
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Description: 高精度时频变换方法及应用，有效提高了时频变换的稳定性和精度(To inversely transform matching pursuit time-frequency
distribution into time signal, a new method for matching
pursuit time-frequency representation was proposed by
weighting the waveform of the Morlet wavelet by its
amplitude spectrum in the frequency direction.) Platform: |
Size: 1336320 |
Author:Joo Kai |
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Description: Time Frequency Toolbox matlab时频分析工具箱,里面有各种时频分析函数，用matlab实现的，小波变换，Gabor变化，短时傅里叶变换等等(AF Ambiguity function
AR Auto-regressive (filter or model)
ASK Amplitude shift keyed signal
BJD Born-Jordan distribution
BPSK Binary phase shift keyed signal
BUD Butterworth distribution
CWD Choi-Williams distribution
FM Frequency modulation
FSK Frequency shift keyed signal
GRD Generalized rectangular distribution
HT Hough transform
MHD Margenau-Hill distribution
MHSD Margenau-Hill-Spectrogram distribution
MMCE Minimum mean cross-entropy
NAF Narrow-band ambiguity function
PMHD Pseudo Margenau-Hill distribution
PWVD Pseudo Wigner-Ville distribution
QPSK Quaternary phase shift keyed signal
RID Reduced interference distribution
STFT Short-time Fourier transform
TFR Time-frequency representation
WAF Wide-band ambiguity function
WVD Wigner-Ville distribution
ZAM Zhao-Atlas-Marks distribution) Platform: |
Size: 306176 |
Author:fisher86 |
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Search - time frequency distribution