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

自制软件，实现频谱分析。能显示信号与频谱图。主要是对正弦信号和三角波进行一维FFT变换，得到频谱图。-Self-made software, the realization of spectral analysis. Showing the signal and frequency spectrum. Mainly sinusoidal signal and triangular wave transform one-dimensional FFT, the frequency spectrum

本程序是由matlab编写的频谱分析仪器，可以生成正弦、方波、三角波或混有白噪声的信号，还可以对信号进行指定点数的频谱分析。-This program is written by the matlab spectrum analysis instrument that can generate sine, square, triangle, or mixed with white noise signal, you can also specify the signal spectrum ana

对正弦信号做希尔伯特变换及其频谱分析，适合学习计算方法的学生-Do sinusoidal signal and a Hilbert transform spectrum analysis, calculation methods for student learning