Xem mẫu
Convolution
1D and 2D signal processing
Consider the delta function
x(n) (n)
x(0) n 0
0 else
(t)dt 1
Time-shift delta
k (n k)
x k x(k) k
(t td )
Sample the input (it’s a convolution!)
( *x)[n] [n k]x[k] x[n] k
s(t) (t n / fs) n
vs(t) v(t)s(t) v(t) (t n/ fs) n
What does sampling do to spectrum?
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