W I N D O W F U N C T I O N S
A P P E N D I X D
Hanning, Hamming:
These windows are based on a raised cosine shape. In addition to
providing continuity (Hanning) or near continuity (Hamming), both provide a shape that makes
the slopes of the signal agree at the beginning and the end of the signal buffer. This filter
provides for both good sensitivity and less bleed-through in the FFT. In situations of low
dynamic range requiring a higher spectral resolution, such as (weak signal) CW using the
narrowest filters.
o
Hanning (also known as Hann):
Figure 188: Hanning Window Function and Frequency Response to a Sinusoid
o
Hamming:
Figure 189: Hamming Window Function and Spectral Response to a Sinusoid
214
2003-2008 FlexRadio Systems
