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fft.rar
- FFT算法的基本原理是把长序列的DFT逐次分解为较短序列的DFT。按照抽取方式的不同可分为DIT-FFT(按时间抽取)和DIF-FFT(按频率抽取)算法。按照蝶形运算的构成不同可分为基2、基4、基8以及任意因子(2n,n为大于1的整数),基2、基4算法较为常用。,FFT algorithm is the basic principle of DFT successive long sequence is broken down into shorter sequences of DFT. In
FFT
- 脑波FFT变换 调用格式见m文件头部说明(下边也复制了一份) 有配套.DLL.h.lib.ctf文件,可以在C或C++环境中调用 ------------------------------------ 保存为FFT.m文件 输入参数: N:进行FFT变换的点数(要求是2的N次幂); fs:信号的采样频率(frequency of simpling) sig:进行FFT变换的数组(一维)。 输出参数: f_sig:变换后的信号(一维数组) E_de
FFT
- 利用FFT估计正弦信号的频率,要估计一个叠加了高斯白噪声的正弦信号 的频率 ,可以通过对x(n)做傅里叶变换,得到频谱图,找出幅度的最大值对应的频率值 ,进行多次变换,求出均方误差 。改变信噪比SNR,通过仿真可以得出随着信噪比增加,均方误差减小。-Sinusoidal signal using FFT frequency estimation, to estimate a Gaussian white noise superimposed on the frequency of sinusoi
fft
- fft的算法,数据处理成频谱图,波形图的功能!-fft algorithms, data processing into the frequency spectrum, waveform features!
fft
- 对图像进行快速傅里叶变换,在频率域去除高频信息再逆变换到空间域,完成图像栅格信息的消除。-Fast Fourier transform of the image, in the frequency domain to remove high-frequency information and the inverse transform to the spatial domain, to complete the elimination of the image grid of informati
FFT
- FFT算法的基本原理是把长序列的DFT逐次分解为较短序列的DFT.按照抽取方式的不同可分为DIT-FFT(按时间抽取)和DIF-FFT(按频率抽取)算法.按照蝶形运算的构成不同可分为基2、基4、基8以及任意因子(2n,n为大于1的整数),基2、基4算法较为常-The FFT algorithm s basic principle is decomposes gradually long sequence DFT into short sequence DFT. different may div
fft(VB)
- VB编写的快速傅里叶算法,可以稍作修改、作为一维曲线数据的频域滤波程序。内有波形数据,可供实验。-VB Fast Fourier Transform Algorithm prepared, you can make some modifications, as a one-dimensional curve data of the frequency domain filtering procedure. Within the waveform data, for experiment.
FFT
- Matlab中的fft分析含噪声的信号,其中有直接FFT,时域同步平均后FFT,频域同步平均后FFT-Matlab' s fft of noisy signals, which have a direct FFT, time-domain synchronous averaging the FFT, frequency domain averaged FFT synchronization
FFT
- 图像快速傅立叶变换,主要用于图像的频域分析处理。-Image Fast Fourier Transform, mainly for image processing frequency domain analysis.
fft
- matlab里FFT变换时的频移程序,自动将FFT变化后的数据移到零频两边,方便好用-FFT transform in matlab frequency shift when the process changes automatically after the FFT to the zero-frequency data on both sides, easy-to-use
fft
- ASK,FSK,PSK信号调制及用FFT法进行频率估计-ASK signal modulation and the FFT algorithm with frequency estimation
FFT
- matlab program to fing FFT of given sequence using decimation in time and decimation in frequency algorithms
fft
- 时域信号转换为频域信号的几个例子,本人都用过的,绝对能运行-Time-domain signal is converted to frequency domain signal a few examples, I have been used, absolutely can run
fft
- matlab 数字图像信号的频域分析及仿真 将二维数字图像进行傅立叶频域分析,并且做了图像幅度谱重建和相位谱重建,通过这个例子大家可以明白相位比振幅更重要。-matlab digital image signals in frequency domain analysis and simulation of two-dimensional digital image Fourier frequency domain analysis, and has done a reconstructio
FFT
- fft分析程序,可以完成对输入信号的谐波分析,得到谐波的频率和幅值-fft analysis program, to be completed on the input signal harmonic analysis, harmonic frequency and amplitude
analysis-the-result-of-FFT
- 详细介绍了FFT变换的物理意义,分析了fft后的频率分辨率等-Detail the physical meaning of the FFT transform, after analysis of the fft frequency resolution, etc.
fft
- Matlab的FFT算法程序 里面有基2时间抽取的FFT 还有基2频率抽取的FFT -Matlab' s FFT algorithm which has taken the time base 2 radix-2 FFT have taken the FFT frequency
Frequency-Analysis---FFT
- FFT Frequency Analysis
FFT-frequency-analysis
- FFT的频谱分析及应用 包括模拟信号 、连续信号、 以及噪声信号的频谱分析-FFT spectrum analysis and application of analog signals of a continuous signal and the noise signal spectrum analysis
fft
- FFT的仿真程序,包含详细注释,以及时频图。(FFT's simulation program, including detailed annotations, and time frequency diagrams.)