Al Clark <[email protected]> writes:

> Assuming a Window approach:
>
> If the length of the filter is 4i-1, that is 3,7,11,..... there will be
> 2i nonzero coefficients and 2i-1 zero coefficients. The sequence is
> w0,0,w2,0,......w(4i-2)
>
> If the length of the filter is 4i+1, that is 5,9,13,..... there will be
> 2i nonzero coefficients and 2i+1 zero coefficients. The sequence is 0,
> w1, 0, w3,....0
>
> There is the same number of non zero coefficients for 4i-1 and 4i+1
> length filters.

I don't see why the 4i-1 length filter has different coefficients from
the 4i+1 case.

Is it the window that has zeros? (Hmm. w0, w2 etc suggests that.)

Ciao,

Peter K.

--
"And he sees the vision splendid
of the sunlit plains extended
And at night the wondrous glory of the everlasting stars."