sdr::FreqShiftBase< Scalar > Class Template Reference

A performant implementation of a frequency-shift operation on integer signals. More...

#include <freqshift.hh>

Inheritance diagram for sdr::FreqShiftBase< Scalar >:

Public Types
typedef std::complex< Scalar >	CScalar
	The complex input signal. More...
typedef Traits< Scalar >::SScalar	SScalar
	The compute (super) scalar of the input type. More...
typedef std::complex< SScalar >	CSScalar
	The complex compute (super) scalar of the input type. More...

Public Member Functions
	FreqShiftBase (double F, double Fs)
	Constructor. More...
virtual	~FreqShiftBase ()
	Destructor. More...
double	sampleRate () const
	Returns the sample rate. More...
virtual void	setSampleRate (double Fs)
	Sets the sample rate and updates the LUT. More...
double	frequencyShift () const
	Returns the frequency shift. More...
virtual void	setFrequencyShift (double F)
	Sets the frequency shift and updates the LUT. More...
CSScalar	applyFrequencyShift (CSScalar value)
	Performs the frequency shift on a single sample. More...

Protected Member Functions
void	_update_lut_incr ()
	Updates the multiplier LUT. More...

Protected Attributes
double	_freq_shift
	The current frequency shift. More...
double	_Fs
	The current sample rate. More...
size_t	_lut_inc
	The LUT increment. More...
size_t	_lut_count
	The LUT index counter. More...
Buffer< CSScalar >	_lut
	The LUT. More...

Static Protected Attributes
static const size_t	_lut_size = 128
	The size of the LUT. More...

Detailed Description

template<class Scalar>
class sdr::FreqShiftBase< Scalar >

A performant implementation of a frequency-shift operation on integer signals.

Member Typedef Documentation

template<class Scalar>

typedef std::complex<Scalar> sdr::FreqShiftBase< Scalar >::CScalar

The complex input signal.

template<class Scalar>

typedef std::complex<SScalar> sdr::FreqShiftBase< Scalar >::CSScalar

The complex compute (super) scalar of the input type.

template<class Scalar>

typedef Traits<Scalar>::SScalar sdr::FreqShiftBase< Scalar >::SScalar

The compute (super) scalar of the input type.

Constructor & Destructor Documentation

template<class Scalar>

sdr::FreqShiftBase< Scalar >::FreqShiftBase ( double  F, double  Fs  )

inline

Constructor.

template<class Scalar>

virtual sdr::FreqShiftBase< Scalar >::~FreqShiftBase ( )

inlinevirtual

Destructor.

Member Function Documentation

template<class Scalar>

void sdr::FreqShiftBase< Scalar >::_update_lut_incr ( )

inlineprotected

Updates the multiplier LUT.

template<class Scalar>

CSScalar sdr::FreqShiftBase< Scalar >::applyFrequencyShift ( CSScalar  value )

inline

Performs the frequency shift on a single sample.

template<class Scalar>

double sdr::FreqShiftBase< Scalar >::frequencyShift ( ) const

inline

Returns the frequency shift.

template<class Scalar>

double sdr::FreqShiftBase< Scalar >::sampleRate ( ) const

inline

Returns the sample rate.

template<class Scalar>

virtual void sdr::FreqShiftBase< Scalar >::setFrequencyShift ( double  F )

inlinevirtual

Sets the frequency shift and updates the LUT.

template<class Scalar>

virtual void sdr::FreqShiftBase< Scalar >::setSampleRate ( double  Fs )

inlinevirtual

Sets the sample rate and updates the LUT.

Reimplemented in sdr::BaseBand< Scalar >.

Member Data Documentation

template<class Scalar>

double sdr::FreqShiftBase< Scalar >::_freq_shift

protected

The current frequency shift.

template<class Scalar>

double sdr::FreqShiftBase< Scalar >::_Fs

protected

The current sample rate.

template<class Scalar>

Buffer<CSScalar> sdr::FreqShiftBase< Scalar >::_lut

protected

The LUT.

template<class Scalar>

size_t sdr::FreqShiftBase< Scalar >::_lut_count

protected

The LUT index counter.

template<class Scalar>

size_t sdr::FreqShiftBase< Scalar >::_lut_inc

protected

The LUT increment.

template<class Scalar>

const size_t sdr::FreqShiftBase< Scalar >::_lut_size = 128

staticprotected

The size of the LUT.

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

• /Users/hannes/Uni/Elektronik/sdr/libsdr/src/freqshift.hh