Assuming we have time domain signal $$x(t)\,\,\,\,\,\,\, 0\leq t< T$$ and we decide to upsample the signal by factor $L\geq1$.
Then the samples of this oversampled time domain signal are represent as
I have read in paper that setting $L=1$ corresponding to the case of Nyquist rate sampling, does anyone know why this is case
If $L=4$ how many zeros are padded to obtained the upsampled signal?
I provided the text that made me ask the question in first place.