reffilter
Reference filter for fixed-point or single-precision filter
Syntax
href = reffilter(hd)
Description
href = reffilter(hd)
returns
a new filter href
that has the same structure as hd
,
but uses the reference coefficients and has its arithmetic property
set to double
. Note that hd
can
be either a fixed-point filter (arithmetic property set to 'fixed
',
or a single-precision floating-point filter whose arithmetic property
is 'single
').
reffilter(hd)
differs from
double
(hd)
in that
the filter
href
returned byreffilter
has the reference coefficients ofhd
.double(hd)
returns the quantized coefficients ofhd
represented in double-precision.
To check the performance of your fixed-point filter, use href
= reffilter(hd)
to quickly have the floating-point, double-precision
version of hd
available for comparison.
Examples
Version History
Introduced in R2011a