dx = x(2)-x(1);
w = linspace(-2*pi/dx,2*pi/dx,length(x));
Fy = fftshift(fft(y));
plot(w,abs(Fy))

11楼: Originally posted by sxf2012 at 2014-10-24 18:16:25
dx = x(2)-x(1);
w = linspace(-2*pi/dx,2*pi/dx,length(x));
Fy = fftshift(fft(y));
plot(w,abs(Fy))

12楼: Originally posted by 戴钢盔的猪头 at 2014-10-24 19:50:50
采样点没有零点，要做相位校正，如果你只关心频谱实部的话。快速傅里叶变换采样点的间隔决定谱宽，具体采样点不用给出，只要知道第一个采样点，采样间隔和采样点数三者即可。如果随机采样做离散傅里叶变换或压缩感知 ...

14楼: Originally posted by 阿乐斗士 at 2014-10-25 20:56:09
该怎么做相位校正呢？...