gr::filter::mmse_fir_interpolator_ff Class Reference

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

#include <mmse_fir_interpolator_ff.h>

List of all members.

Public Member Functions
	mmse_fir_interpolator_ff ()
	~mmse_fir_interpolator_ff ()
unsigned	ntaps () const
unsigned	nsteps () const
float	interpolate (const float input[], float mu) const
	compute a single interpolated output value. input must have ntaps() valid entries. input[0] .. input[ntaps() - 1] are referenced to compute the output value.
Protected Attributes
std::vector < kernel::fir_filter_fff * >	filters

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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

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Constructor & Destructor Documentation

gr::filter::mmse_fir_interpolator_ff::mmse_fir_interpolator_ff

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gr::filter::mmse_fir_interpolator_ff::~mmse_fir_interpolator_ff

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Member Function Documentation

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

compute a single interpolated output value. input must have ntaps() valid entries. input[0] .. input[ntaps() - 1] are referenced to compute the output value.

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

Returns:

the interpolated input value.

unsigned gr::filter::mmse_fir_interpolator_ff::nsteps

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const

unsigned gr::filter::mmse_fir_interpolator_ff::ntaps

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const

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Member Data Documentation

std::vector<kernel::fir_filter_fff*> gr::filter::mmse_fir_interpolator_ff::filters [protected]

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

• mmse_fir_interpolator_ff.h