Performs a frequency shift on a complex input signal, by multiplying it with $e^{i\omega t}$ . More...

#include <utils.hh>

Inheritance diagram for sdr::FreqShift< Scalar >:

Public Member Functions
	FreqShift (double shift, Scalar scale=1.0)
	Constructs a frequency shift node with optional scaleing of the result. More...

virtual	~FreqShift ()
	Destructor. More...

double	shift () const
	Returns the frequency shift. More...

void	setShift (double shift)
	Sets the frequency shift. More...

virtual void	config (const Config &src_cfg)
	Configures the frequency shift node. More...

virtual void	process (const Buffer< std::complex< Scalar > > &buffer, bool allow_overwrite)
	Performs the frequency shift. More...

Public Member Functions inherited from sdr::Sink< std::complex< Scalar > >
	Sink ()
	Constructor. More...

virtual	~Sink ()
	Drestructor. More...

virtual void	handleBuffer (const RawBuffer &buffer, bool allow_overwrite)
	Re-implemented from `SinkBase`. More...

Public Member Functions inherited from sdr::SinkBase
	SinkBase ()
	Constructor. More...

virtual	~SinkBase ()
	Destructor. More...

Public Member Functions inherited from sdr::Source
	Source ()
	Constructor. More...

virtual	~Source ()
	Destructor. More...

virtual void	send (const RawBuffer &buffer, bool allow_overwrite=false)
	Sends the given buffer to all connected sinks. More...

void	connect (SinkBase *sink, bool direct=false)
	Connect this source to a sink. More...

void	disconnect (SinkBase *sink)
	Disconnect a sink again. More...

virtual void	setConfig (const Config &config)
	Stores the configuration and propergates it if the configuration has been changed. More...

virtual double	sampleRate () const
	Returns the configured sample rate or `0` otherwise. More...

virtual Config::Type	type () const
	Returns the configured source type or `Config::Type_UNDEFINED` otherwise. More...

template<class T >
void	addEOS (T instance, void(T::function)())
	Adds a callback to the end-of-stream signal of the source. More...

Protected Attributes
Buffer< std::complex< Scalar > >	_buffer
	The output buffer. More...

double	_shift
	The frequency shift in Hz ( $\omega=2\pi f$ ). More...

Scalar	_scale
	The optional scale. More...

std::complex< double >	_factor
	The current exponental factor, gets updated for every sample. More...

double	_sample_rate
	The current sample rate. More...

std::complex< double >	_delta
	$\exp(i\omega t)$ . More...

Protected Attributes inherited from sdr::Source
Config	_config
	Holds the source configuration, this can be updated by calling `setConfig`. More...

std::map< SinkBase *, bool >	_sinks
	The connected sinks. More...

std::list< DelegateInterface * >	_eos
	The connected EOS singal handlers. More...

Additional Inherited Members
Protected Member Functions inherited from sdr::Source
void	signalEOS ()
	Signals the EOS. More...

void	propagateConfig (const Config &config)
	Propagates the given configuration to all connected sinks. More...

Detailed Description

template<class Scalar>
class sdr::FreqShift< Scalar >

Performs a frequency shift on a complex input signal, by multiplying it with $e^{i\omega t}$ .

Please note, this node performs not optimal in cases, where the input scalar is an integer, as the computation is performed using double precision floating point numbers.

Deprecated:: Implement a more efficient variant using FreqShiftBase.

Constructor & Destructor Documentation

template<class Scalar >

sdr::FreqShift< Scalar >::FreqShift	(	double	shift,
		Scalar	scale = `1.0`
	)

inline

Constructs a frequency shift node with optional scaleing of the result.

template<class Scalar >

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

inlinevirtual

Destructor.

Member Function Documentation

template<class Scalar >

virtual void sdr::FreqShift< Scalar >::config ( const Config & src_cfg )

inlinevirtual

Configures the frequency shift node.

Implements sdr::SinkBase.

template<class Scalar >

virtual void sdr::FreqShift< Scalar >::process	(	const Buffer< std::complex< Scalar > > &	buffer,
		bool	allow_overwrite
	)

inlinevirtual

Performs the frequency shift.

Implements sdr::Sink< std::complex< Scalar > >.

template<class Scalar >

void sdr::FreqShift< Scalar >::setShift ( double shift )

inline

Sets the frequency shift.

template<class Scalar >

double sdr::FreqShift< Scalar >::shift ( ) const

inline

Returns the frequency shift.

Member Data Documentation

template<class Scalar >

Buffer< std::complex<Scalar> > sdr::FreqShift< Scalar >::_buffer

protected

The output buffer.

template<class Scalar >

std::complex<double> sdr::FreqShift< Scalar >::_delta

protected

$\exp(i\omega t)$ .

template<class Scalar >

std::complex<double> sdr::FreqShift< Scalar >::_factor

protected

The current exponental factor, gets updated for every sample.

template<class Scalar >

double sdr::FreqShift< Scalar >::_sample_rate

protected

The current sample rate.

template<class Scalar >

Scalar sdr::FreqShift< Scalar >::_scale

protected

The optional scale.

template<class Scalar >

double sdr::FreqShift< Scalar >::_shift

protected

The frequency shift $f$ in Hz ( $\omega=2\pi f$ ).

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

/Users/hannes/Uni/Elektronik/sdr/libsdr/src/utils.hh

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

template<class Scalar> class sdr::FreqShift< Scalar >

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

template<class Scalar>
class sdr::FreqShift< Scalar >