|
我用FFT軟體算出x=[1,2,3,4,5,4,3,2]8個序列點的值,+ ?% Q0 S6 `, f2 t0 M
8 J8 }7 R- v6 y' N; _! m7 b
X[0] = 24+(0)j0 J/ j( p7 J) o* u. u
X[1] = -6.82842712475+(-1.33226762955E-15)j
0 B. C& R! R' }- O( _9 K% XX[2] = 3.09539720245E-17+(0)j# L9 {1 G! C1 I
X[3] = -1.17157287525+(2.88657986403E-15)j
/ ^$ A! X( B' v' bX[4] = 0+(-4.89842541529E-16)j, C$ p8 H5 C" i: N' j0 J- W4 y
X[5] = -1.17157287525+(-2.44249065418E-15)j1 y1 _6 s/ ^, ]+ m
X[6] = -9.86282453277E-15+(-6.66133814775E-16)j
5 G% h) B# V: N7 UX[7] = -6.82842712475+(-2.22044604925E-15)j
$ N+ A/ H3 Q# n% `1 l# {: O( F
, Z& @8 f' f7 G; w0 n5 M我該如何藉由這些值算出SNR及THD呢? |
|