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imf_fft - 副本
- 计算每个IMF分量及最后一个剩余分量residual与原始信号的相关性;计算各IMF的方差贡献率;绘制FFT频谱(The correlation between each IMF component and the last residual component residual and the original signal is calculated; the variance contribution rate of each IMF is calculated; and the FFT
$R8SOOS0
- 随机产生一次数据x=randn（1，1024*8） 对这个序列进行FFT然后求功率谱密度 。应用MATLAB画出来横坐标为频率（Frequency(hz)））纵坐标为功率谱密度（Power Spectrum Density） (dB))的图形(Randomly generate a data x=randn (11024*8) to carry out FFT for this sequence and then obtain power spectral density. Drawing th
ADCdongtai
- 可用于测量ADC的信噪比SNR，信纳比SINAD，无杂散动态范围SFDR，总谐波失真THD，得到频谱图及时域图的MATLAB作图,ADC测试方法是fft法(The following program code plots the FFT spectrum of a desired test tone. Test tone based on coherent sampling criteria, and computes SNR, SINAD, THD and SFDR.)
fft_ana
- 给定了一个初始函数，利用FFT进行频谱分析，如果有自己的采样数据，只需设置采样频率即可实现频谱分析。(Given an initial function, spectrum analysis is carried out by using FFT. If there is one's own sampling data, only setting sampling frequency can realize spectrum analysis.)
频谱分析
- 这是一个频谱分析的matlab程序，通过FFT变换,获得采样数据基本信息，时域图，频域图。(This is a spectrum analysis matlab program, through FFT transformation, get the basic information of sampling data, time-domain map, frequency-domain map.)
DIY音乐频谱显示资料
- 使用FFT傅里叶变换，实现音乐频谱显示，程序是配点阵显示屏(The use of FFT Fourier transform, music spectrum display, the program is equipped with dot matrix display.)
TTF,小波变换
- 基于FFT的谐波检测,采用快速傅里叶算法后得到原始波形中各次分量的频率和幅值特性，从中可以直接观测出各次谐波分量的频率和幅值信息. 程序1采用快速傅里叶算法后得到原始波形中各次分量的频率和幅值特性图 程序2输入信号经过FFT变换得到的频谱特性图 程序3对输入信号进行采样，应用一维小波变换函数进行三层小波分析(Based on FFT harmonic detection, the frequency and amplitude characteristics of each harmoni