How can i set the plot values of a specgram.
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I have a DTMF signal, that i realized a specgram of it. But i dont know how to set my own values to it, i want to put this code to this signal.
title("Spectograma semnalului DTMF")
xlabel("Timp[ms]");
ylabel("Frecventa[Hz]");
axis([0, 800, 0, 2000]);
xticks(0:200:800);
yticks([800, 900, 1000, 1100]);
grid on;
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Antworten (1)
Hiro Yoshino
am 24 Mai 2022
Short Time Fourier Transform?
stft(x,fs,'Window',kaiser(256,5),'OverlapLength',220,'FFTLength',512);
3 Kommentare
Hiro Yoshino
am 24 Mai 2022
It seems that it is just about your setting for that function.
You can remove the "overlap" and try making the window narrower.
Hiro Yoshino
am 24 Mai 2022
If you want to suppress areas of no-interest, you can replace those values with something else by giving a threshold to it:
x(x<threshold) = 0;
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