Public Member Functions |
| gri_iir (const std::vector< tap_type > &fftaps, const std::vector< tap_type > &fbtaps) throw (std::invalid_argument) |
| Construct an IIR with the given taps.
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| gri_iir () |
| ~gri_iir () |
o_type | filter (const i_type input) |
| compute a single output value.
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void | filter_n (o_type output[], const i_type input[], long n) |
| compute an array of N output values. input must have N valid entries.
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unsigned | ntaps_ff () const |
unsigned | ntaps_fb () const |
void | set_taps (const std::vector< tap_type > &fftaps, const std::vector< tap_type > &fbtaps) throw (std::invalid_argument) |
| install new taps.
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template<class i_type, class o_type, class tap_type>
class gri_iir< i_type, o_type, tap_type >
base class template for Infinite Impulse Response filter (IIR)
template<class i_type, class o_type, class tap_type>
gri_iir< i_type, o_type, tap_type >::gri_iir |
( |
const std::vector< tap_type > & |
fftaps, |
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const std::vector< tap_type > & |
fbtaps |
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) |
| throw (std::invalid_argument) |
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inline |
Construct an IIR with the given taps.
This filter uses the Direct Form I implementation, where fftaps
contains the feed-forward taps, and fbtaps
the feedback ones.
fftaps
and fbtaps
must have equal numbers of taps
The input and output satisfy a difference equation of the form
with the corresponding rational system function
Note that some texts define the system function with a + in the denominator. If you're using that convention, you'll need to negate the feedback taps.