Ngày tải lên :
08/06/2014, 20:19
... equivalent to writing the sequence CCW around a circle, and then reading the
values CW.
Example
. If x[n] = {10 , 11 , 12 , 13 , 14 } and N = 6, then x[−n mod N] = {10 , 0, 14 , 13 , 12 , 11 }.
Picture of circle
We ... 8.
15 10 −5 0 5 10 15
0
1
2
3
4
5
n
x(n)
L=6
Time−limited signal x(n)
15 10 −5 0 5 10 15
0
1
2
3
4
5
n
x((n))
N
Periodic extension x((n))
N
with N=6
N 2N−N−2N
15 10 −5 0 5 10 15
0
1
2
3
4
5
n
x(n)
L=6
Time−limited ... writing the sequence CCW around a circle, and then reading the values
CCW starting from point −l.
Example. If x[n] = {10 , 11 , 12 , 13 , 14 } and N = 6 and l = 2, then x[n −l mod N] = {14 , 0, 10 , 11 , 12 ,...