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我用FFT軟體算出x=[1,2,3,4,5,4,3,2]8個序列點的值,
& Q6 o+ C8 ], F/ r" B, _! O. I
4 j1 d% m7 I' HX[0] = 24+(0)j
4 z4 @. t. r5 \* v5 D6 N' L' b9 ?1 KX[1] = -6.82842712475+(-1.33226762955E-15)j
3 B% X" T: O( z: W, d4 M& b$ AX[2] = 3.09539720245E-17+(0)j
# ?6 U: B n) y& l8 _, _) p9 [X[3] = -1.17157287525+(2.88657986403E-15)j- _' @8 j/ ]' B5 R( Q) M) ?
X[4] = 0+(-4.89842541529E-16)j
# n/ o6 f3 `1 K1 D" hX[5] = -1.17157287525+(-2.44249065418E-15)j0 u9 J5 p$ \* @/ l7 I
X[6] = -9.86282453277E-15+(-6.66133814775E-16)j- Z$ k5 q x7 @( P; W
X[7] = -6.82842712475+(-2.22044604925E-15)j
- |" z) V$ {3 D4 ?% i& s( [6 B4 f5 U: ?4 B
我該如何藉由這些值算出SNR及THD呢? |
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