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gr::filter::mmse_fir_interpolator_cc Class Reference

Compute intermediate samples between signal samples x(k*Ts) More...

#include <gnuradio/filter/mmse_fir_interpolator_cc.h>

Public Member Functions

 mmse_fir_interpolator_cc ()
 mmse_fir_interpolator_cc (mmse_fir_interpolator_cc &&)=default
unsigned ntaps () const
unsigned nsteps () const
gr_complex interpolate (const gr_complex input[], float mu) const
 compute a single interpolated output value. More...

Protected Attributes

std::vector< kernel::fir_filter_ccffilters

Detailed Description

Compute intermediate samples between signal samples x(k*Ts)

This implements a Minimum Mean Squared Error interpolator with 8 taps. It is suitable for signals where the bandwidth of interest B = 1/(4*Ts) Where Ts is the time between samples.

Although mu, the fractional delay, is specified as a float, it is actually quantized. 0.0 <= mu <= 1.0. That is, mu is quantized in the interpolate method to 32nd's of a sample.

For more information, in the GNU Radio source code, see:

  • gr-filter/lib/gen_interpolator_taps/README
  • gr-filter/lib/gen_interpolator_taps/praxis.txt

Constructor & Destructor Documentation

◆ mmse_fir_interpolator_cc() [1/2]

gr::filter::mmse_fir_interpolator_cc::mmse_fir_interpolator_cc ( )

◆ mmse_fir_interpolator_cc() [2/2]

gr::filter::mmse_fir_interpolator_cc::mmse_fir_interpolator_cc ( mmse_fir_interpolator_cc &&  )

Member Function Documentation

◆ interpolate()

gr_complex gr::filter::mmse_fir_interpolator_cc::interpolate ( const gr_complex  input[],
float  mu 
) const

compute a single interpolated output value.

input must have ntaps() valid entries and be 8-byte aligned. input[0] .. input[ntaps() - 1] are referenced to compute the output value.

std::invalid_argumentif input is not 8-byte aligned.

mu must be in the range [0, 1] and specifies the fractional delay.

the interpolated input value.

◆ nsteps()

unsigned gr::filter::mmse_fir_interpolator_cc::nsteps ( ) const

◆ ntaps()

unsigned gr::filter::mmse_fir_interpolator_cc::ntaps ( ) const

Member Data Documentation

◆ filters

std::vector<kernel::fir_filter_ccf> gr::filter::mmse_fir_interpolator_cc::filters

The documentation for this class was generated from the following file: