Window Functions and Spectral Leakage - Signal Processing of Random Physiological Signals - page 190

1.2

-20

1.0

-40

0 T -n bins 0 n bins

(a) (b)

FIGURE 16.12 : Hanning window with Alpha of 2. The trace (a) is the time domain weighted
coefficients, whereas the trace (b) shows the main frequency lobe with the first side lobe at − 32 dB

and a − 18 dB per octave side-lobe fall-off rate

1 dB

1.2 -20

1.0

-40

-60

0 T -n bins 0 n bins

(a) (b)

FIGURE 16.13 : Hanning window with alpha of 3. The trace (a) is the time domain weighted
coefficients, whereas the trace (b) shows the main frequency lobe with the first side lobe at − 39 dB

and a − 24 dB per octave side-lobe fall-off rate

1 dB

1.2 -20

1.0

-40

-60

0 T -n bins 0 n bins

(a) (b)

FIGURE 16.14 : Hanning window with alpha of 4. The trace (a) is the time domain weighted
coefficients, whereas the trace (b) shows the main frequency lobe with the first side lobe at − 47 dB

and a − 30 dB per octave side-lobe fall-off rate