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FFT

于 2011-04-26 发布文件大小:1KB

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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 sinusoidal signals, can be achieved by x (n) be the Fourier transform to get spectrum to identify the magnitude of the frequency value corresponding to the maximum , several transformations, find the mean square error. Change the signal to noise ratio SNR, the simulation can be drawn as the SNR increases, the mean square error decreases.)

文件列表：

FFT
...\first.m,693,2010-10-30
...\Untitled2.m,340,2010-10-30
first.m,693,2010-10-30

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