I have an sinusoidal signals ranging from 1 to 5 KHz and they are being sampled at 1500 Hz . I need to show the aliased spikes that fall in a LP filter of 1 kHz. Can fft be used ? I am trying a simple fft problem first but i cannot get the xasis correct. My code is :
f = input ('Enter the analog frequencies: '); fs = input ('Enter the Sampling frequency: '); Ts = 1/fs; Ns = 512 t = [0:Ts:Ts*(Ns-1)]; x = sin(2*pi*f*t); X = fft(x,Ns)/Ns; xdft = fftshift(X); plot(abs(xdft))
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