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naser
Posts:
61
Registered:
3/20/09


FFT of chirp signal
Posted:
Jan 31, 2010 10:28 AM


I generate a chirp signal with matlab. I want to plot FFT of this signal but results is wrong.I think FFt this signal must be a line in a interval frequency.
Would you please help me.
t=[0:1e6:400/1000]; y=chirp(t,100,.4,100000); Y = fft(y,1024); Pyy = Y.* conj(Y) / 1024; f = 1000000*(0:512)/1024; plot(f,Pyy(1:513)) title('Frequency content of y') xlabel('frequency (Hz)')



