GNU Radio 3.6.5 C++ API

gr::filter::mmse_fir_interpolator_cc Class Reference

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

#include <mmse_fir_interpolator_cc.h>

List of all members.

Public Member Functions

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

Protected Attributes

< kernel::fir_filter_ccf * > 

Detailed Description

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

This implements a Mininum 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:

  • gnuradio-core/src/gen_interpolator_taps/README
  • gnuradio-core/src/gen_interpolator_taps/praxis.txt

Constructor & Destructor Documentation

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

Member Function Documentation

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

Member Data Documentation

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