System object: dsp.DigitalDownConverter
Get handles to decimation filter objects
S = getFilters(dwnConv)
S = getFilters(dwnConv) returns a structure,
with copies of the filter System objects and the CIC normalization
factor that form the decimation filter cascade. The
field is empty if the third filter stage has been bypassed. The CIC
normalization factor equals the inverse of the CIC filter gain. In
some cases, this gain includes a correction factor to ensure that
the cascade response meets the ripple specifications.
the arithmetic of the filter stages. You can set
fixed-point. When object
in an unlocked state, you must specify the arithmetic input. When
dwnConv is in a locked state, the arithmetic
input is ignored.
dwnConv is in an unlocked state, and you
specify the arithmetic as
returns filter System objects. The custom coefficient data type properties
of these System objects are set to the values that the
dsp.DigitalDownConverter System object™ uses
to process data when you call the
step method. All
other fixed-point properties are set to their default values.
dwnConv is in a locked state, and the
input to the step method is of a fixed-point data type, the
returns filter System objects. All fixed-point properties of these
System objects are set to the exact values that the
dsp.DigitalDownConverter System object uses
to process the data.