PSF and Weighted Overlap Add
Using ``square-root windows''
in the WOLA context, the
valid hop sizes
are identical to those for
in the OLA case.
More generally, given any window
for use in a WOLA system, it
is of interest to determine the hop sizes which yield perfect
reconstruction.
Recall that, by the Poisson Summation Formula (PSF),
![]() |
(9.39) |
For WOLA, this is easily modified to become
![]() |
(9.40) |
where


When
, this becomes
![]() |
(9.41) |
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Example COLA Windows for WOLA
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PSF Dual and Graphical Equalizers