www.gusucode.com > signal 案例源码程序 matlab代码 > signal/SynchrosqueezedFourierTransformOfSinusoidExample.m
%% Fourier Synchrosqueezed Transform of Sinusoidal Signal % Generate 1024 samples of a signal that consists of a sum of sinusoids % embedded in white Gaussian noise. The normalized frequencies of the % sinusoids are $2\pi/5$ rad/sample and $4\pi/5$ rad/sample. The higher % frequency sinusoid has 3 times the amplitude of the other sinusoid. %% N = 1024; n = 0:N-1; w0 = 2*pi/5; x = sin(w0*n)+3*sin(2*w0*n); %% % Compute the Fourier synchrosqueezed transform of the signal. Plot the % result. [s,w,n] = fsst(x); mesh(n,w/pi,abs(s)) axis tight view(2) colorbar %% % Compute the conventional short-time Fourier transform of the signal for % comparison. Use the default values of |spectrogram|. Plot the result. [s,w,n] = spectrogram(x); surf(n,w/pi,abs(s),'EdgeColor','none') axis tight view(2) colorbar