SPUC::lagrange< Numeric, Coeff > Class Template Reference

Template Lagrange interpolation via FIR Fitler. More...

#include <lagrange.h>

Collaboration diagram for SPUC::lagrange< Numeric, Coeff >:

Public Member Functions
void	reset ()
Numeric	out ()
	Get current output. More...
Numeric	check (long i)
	Clock in new sample & compute current output. More...
	lagrange (void)
	lagrange (long n, long b=0)
	Constructor. More...
	~lagrange (void)
	Destructor. More...
void	set_size (long n)
	Set order of polynomial. More...
void	input (Numeric in)
	Input new sample (do nothing else) More...
Numeric	update (Numeric in, float_type offset)
Numeric	fir (void)
	Calculate output for current coefficients. More...
Numeric	rephase (float_type offset)
	Rephase => recalculate coefficients and output for new offset (for upsampling) More...
void	calculate_coeff (float_type offset)
	Calculate coefficients given an offset. More...
void	print ()
	Print out coefficients. More...

Public Attributes
long	num_taps
std::vector< Coeff >	coeff

Protected Types
typedef mixed_type< Numeric, Coeff >::dtype	sum_type

Protected Attributes
std::vector< Numeric >	z
Numeric	output
quantiser< Numeric >	Q
long	round_bits

Detailed Description

template<class Numeric, class Coeff = float_type>
class SPUC::lagrange< Numeric, Coeff >

Template Lagrange interpolation via FIR Fitler.

This works best for float_type or complex<float_type> Coefficients are always real (i.e. no imaginary parts).

Author

Tony Kirke

Tony Kirke

Member Typedef Documentation

template<class Numeric, class Coeff = float_type>

typedef mixed_type<Numeric,Coeff>::dtype SPUC::lagrange< Numeric, Coeff >::sum_type

protected

Constructor & Destructor Documentation

template<class Numeric, class Coeff = float_type>

SPUC::lagrange< Numeric, Coeff >::lagrange ( void  )

inline

template<class Numeric, class Coeff = float_type>

SPUC::lagrange< Numeric, Coeff >::lagrange ( long  n, long  b = 0  )

inline

Constructor.

template<class Numeric, class Coeff = float_type>

SPUC::lagrange< Numeric, Coeff >::~lagrange ( void  )

inline

Destructor.

Member Function Documentation

template<class Numeric, class Coeff = float_type>

void SPUC::lagrange< Numeric, Coeff >::calculate_coeff ( float_type  offset )

inline

Calculate coefficients given an offset.

Referenced by SPUC::lagrange< SPUC::complex< float_type > >::rephase(), and SPUC::lagrange< SPUC::complex< float_type > >::update().

template<class Numeric, class Coeff = float_type>

Numeric SPUC::lagrange< Numeric, Coeff >::check ( long  i )

inline

Clock in new sample & compute current output.

template<class Numeric, class Coeff = float_type>

Numeric SPUC::lagrange< Numeric, Coeff >::fir ( void  )

inline

Calculate output for current coefficients.

Referenced by SPUC::lagrange< SPUC::complex< float_type > >::rephase(), and SPUC::lagrange< SPUC::complex< float_type > >::update().

template<class Numeric, class Coeff = float_type>

void SPUC::lagrange< Numeric, Coeff >::input ( Numeric  in )

inline

Input new sample (do nothing else)

Referenced by SPUC::quad_data< float_type >::get_sample(), and SPUC::sim_qam< Numeric >::tx_step().

template<class Numeric, class Coeff = float_type>

Numeric SPUC::lagrange< Numeric, Coeff >::out ( )

inline

Get current output.

template<class Numeric, class Coeff = float_type>

void SPUC::lagrange< Numeric, Coeff >::print ( void  )

inline

Print out coefficients.

template<class Numeric, class Coeff = float_type>

Numeric SPUC::lagrange< Numeric, Coeff >::rephase ( float_type  offset )

inline

Rephase => recalculate coefficients and output for new offset (for upsampling)

Referenced by SPUC::quad_data< float_type >::get_sample(), SPUC::sim_qam< Numeric >::tx_step(), and SPUC::resampler< SPUC::complex< CNumeric > >::update().

template<class Numeric, class Coeff = float_type>

void SPUC::lagrange< Numeric, Coeff >::reset ( void  )

inline

Referenced by SPUC::sim_qam< Numeric >::loop_end().

template<class Numeric, class Coeff = float_type>

void SPUC::lagrange< Numeric, Coeff >::set_size ( long  n )

inline

Set order of polynomial.

template<class Numeric, class Coeff = float_type>

Numeric SPUC::lagrange< Numeric, Coeff >::update ( Numeric  in, float_type  offset  )

inline

Update => Clock in new input sample, recalculate coefficients and determine output

Referenced by SPUC::resampler< SPUC::complex< CNumeric > >::update().

Member Data Documentation

template<class Numeric, class Coeff = float_type>

std::vector<Coeff> SPUC::lagrange< Numeric, Coeff >::coeff

template<class Numeric, class Coeff = float_type>

long SPUC::lagrange< Numeric, Coeff >::num_taps

Referenced by SPUC::lagrange< SPUC::complex< float_type > >::calculate_coeff(), SPUC::lagrange< SPUC::complex< float_type > >::fir(), SPUC::lagrange< SPUC::complex< float_type > >::print(), and SPUC::lagrange< SPUC::complex< float_type > >::reset().

template<class Numeric, class Coeff = float_type>

Numeric SPUC::lagrange< Numeric, Coeff >::output

protected

template<class Numeric, class Coeff = float_type>

quantiser<Numeric> SPUC::lagrange< Numeric, Coeff >::Q

protected

Referenced by SPUC::lagrange< SPUC::complex< float_type > >::fir().

template<class Numeric, class Coeff = float_type>

long SPUC::lagrange< Numeric, Coeff >::round_bits

protected

template<class Numeric, class Coeff = float_type>

std::vector<Numeric> SPUC::lagrange< Numeric, Coeff >::z

protected

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

• lagrange.h