subdecode.m

用matlab实现的DTMF解码3种算法

axes(handles.fig1);
plot(t,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
hlow=fft(yn,N);
hmaglow=abs(hlow);
axes(handles.fig4);
stem(hmaglow);
title('FFT translation');grid;
xlabel('k');ylabel('Amplitude');