Description: 有关时频分析做三维图形的源程序，该程序可以绘出信号，频率，以及时频三维图形，对信号的特性分析可以较好把握！-the time-frequency analysis to do 3D graphics source files, the program can draw signal frequency, and the time-frequency 3D graphics, the signal characteristics can better grasp! Platform: |
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Author:王剑 |
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Description: 信号与系统基础知识包括连续信号与模型、离散信号与模型；常用信号变换包括Z变换、Chirp Z变换、FFT变换、DCT变换和Hilbert变换等；离散系统结构包括IIR、FIR和Lattice结构；IIR滤波器设计包括模拟和数字低通、高通、带通与带阻滤波器设计，以及基于冲激响应不变法和双线性Z变换法的IlR滤波器设计等；FIR滤波器设计包括基于窗函数、频率抽样法和切比雪大逼近法的FIR滤波器设计；平稳信号分析包括经典功率谱估计、基于参数模型的功率谱估计和基于非参数模型的功率谱估计；非平稳信号分析包括STFT变换、Gabor展开、Wigner-Ville分布与Choi-Williams分布；非高斯信号分析包括基于非参数法的双谱估计、基于参数模型的双谱估计，以及双谱估计的应用；信号处理的GUI实现包括滤波器设计与分析的FDATool工具和滤波器设计与信号分析的SPTool工具。-signals and systems based on knowledge, including continuous signal with the model, discrete signal and model; Common signals include transform Z transform, chirp Z-transform, FFT transform. DCT and Hilbert transform; Discrete system architecture including IIR, FIR and Lattice structure; IIR filter design, including analog and digital low-pass, high-pass, band-pass and band stop filter design, Based on the impulse response of the same law and bilinear Z transform the IlR filter design; FIR filter design including on the basis of the window function, frequency sampling and snow all over the big approximation of FIR filter design; stationary signal analysis include classical power spectrum estimation, Based on the model parameters of the power spectrum estimation and non- parametric model b Platform: |
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Author:james |
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Description: 对信号进行EMD分解并绘制希尔伯特时频谱的程序，自己做毕业设计编写的- EMD decomposition of signals and time-frequency spectrum of the Hilbert mapping procedures, the design of their own graduates prepared
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Author:jhhxl |
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Description: 一种提取脑电信号EEG特征的时频处理方法，可以参考HHT（Hilbert-Huang Transform的资料）-EEG characteristics of a kind of EEG time-frequency approach can refer to the HHT (Hilbert-Huang Transform information) Platform: |
Size: 1024 |
Author:zhaowumian |
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Description: 优秀论文及配套源码。Hilbert-Huang变换(HHT)是一种新的非平稳信号处理技术，该方法由经验模态 分解(EMD)与Hilbert谱分析两部分组成。任意的非平稳信号首先经过EMD方法处理后被分解为一系列具有不同特征尺度的数据序列，每一个序列称为一个固有模态函数(IMF)，然后对每个IMF分量进行Hilbert谱分析得到相应分量的Hilbert谱，汇总所有Hilbert谱就得到了原信号的谱图。该方法从本质上讲是对非平稳信号进行平稳化处理，将信号中真实存在的不同尺度波动或趋势逐级分解出来，最终用瞬时频率和能量来表征原信号的频率含量。
本文研究了基于HHT的暂态电能质量扰动检测方法，介绍了HHT的基本原理和利用HHT检测电能质量多扰动信号的实现方法。仿真试验表明该方法可以实时检测扰动的起止时刻，持续时间和扰动幅度，适用于电能质量多扰动的监测和辨识系统。
-Hilbert-Huang Transform(HHT) is a new non-stationary signal processing technology，including the Empirical Mode Decomposition(EMD) and Hilbert spectral analysis．In this method，arbitrary non-stationary signals was divided into a series data sequence with different characteristic scales after the first EMD treatment，each sequence is called an intrinsic mode function(IMF)，and then each IMF component gained corresponding the Hilbert spectrum though Hilbert spectrum analysis，a summary of all Hilbert spectrum assembled to the spectra of the original signal．In essence，this method is a stable processing for non-stationary signal，which decomposed the different fluctuations or trends in the signal in rum，and represented the frequency content of the original signal using the final instantaneous frequency and energy．
This paper study a method to detect power quality disturbances based on the HHT，in which the principle and the realization of the HHT and the realization of power quality disturbance Platform: |
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Author:NBB |
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Description: 本程序用于线性调频信号频率的测量，首先产生一加噪线性调频信号，再使用小波滤波去除噪声，最后使用希尔伯特变换法求信号的频率。-This procedure is used to measure the frequency of chirp signal, first generate a chirp signal with noise, and then use wavelet filtering to remove noise, and finally use the Hilbert transform method for the signal frequency. Platform: |
Size: 1024 |
Author:xd |
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Description: 实现希尔伯特-黄变换的功能，并带有一段测试数据。希尔伯特-黄变换是使用EMD分解将信号分解为本征模态函数（IMF），然后求得IMF分量的瞬时频率。其对于非稳态和非线性信号具有优良的效果。-The function plot_hht is a realization of the Hilbert-Huang transform (HHT). The HHT decomposes a signal into intrinsic mode functions (or IMFs), and obtain the instantaneous frequency data. It is designed to work well for data that are nonstationary and nonlinear. Platform: |
Size: 1104896 |
Author:老五 |
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Description: 该程序绘制了仿真信号的FFT频谱和功率谱，并调用emd分析方法，绘制了emd分解结果，以及瞬时包络和瞬时频率图，还有Hilbert-Huang谱和Hilbert边际谱。-The program draws the FFT spectrum and the power spectrum of the simulated signal and call emd analysis, drawn emd decomposition and instantaneous envelope and instantaneous frequency plot, as well as Hilbert-Huang spectrum and Hilbert marginal spectrum. Platform: |
Size: 167936 |
Author:张连鹏 |
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Description: matlab 信号时频分析，结果三维显示(signals Time frequency analysis of MATLAB and 3D display of results) Platform: |
Size: 6084608 |
Author:fpzhang520
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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: 通过卷积希尔伯特滤波器等方法进行移频，随意尝试，(By convolution Hilbert filter and other methods of frequency shift, random attempt,) Platform: |
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Author:cchheennpsp
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Description: 将调制信号通过Hilbert变换，解调出低频信号(Demodulating the low frequency signal through the modulation signal through the Hilbert transform) Platform: |
Size: 3072 |
Author:落日海湾 |
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Search - hilbert frequency matlab