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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,
8 P7 W- j# b# {4 j4 K
. h/ [! O7 L) n* A+ PX[0] = 24+(0)j, Y8 A% r2 g$ Q8 L8 H% `! L
X[1] = -6.82842712475+(-1.33226762955E-15)j$ e a4 n, X. c$ `& N. k% ?0 ^
X[2] = 3.09539720245E-17+(0)j
" N& k" _% G5 b5 Q1 F$ FX[3] = -1.17157287525+(2.88657986403E-15)j8 G0 o# {1 S) V! J# t( s
X[4] = 0+(-4.89842541529E-16)j
) V4 H: Q/ t+ v( D8 o9 x0 ?3 SX[5] = -1.17157287525+(-2.44249065418E-15)j6 K u/ W: m9 E. v ]
X[6] = -9.86282453277E-15+(-6.66133814775E-16)j7 @2 k9 E: {- ?- `* l* ]
X[7] = -6.82842712475+(-2.22044604925E-15)j
% t {% d% O/ D. J7 Z# V8 X: U# U4 [. r/ U' H, h* |& a
我該如何藉由這些值算出SNR及THD呢? |
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