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8/13/2019 ELT410P10Similaridade (1)
1/3
R xy (t)
x[n ] y[n ]
R xy (k) = 1
N k
N k
n =1
x[n ]y[n + k],
k = 0 , 1,...,m N
8/13/2019 ELT410P10Similaridade (1)
2/3
0
2xy (f )
x[n ] y[n ]
2xy (f ) =
M
i =1X
i (f )Y i (f )
2
M
i =1
|X i (f )|2
M
i =1
|Y i (f )|2
,
M X i (f ) Y i (f )
1 / 10
8/13/2019 ELT410P10Similaridade (1)
3/3
0 20
7
x y
512