SoDa::QuadratureOscillator Class Reference

sin/cos oscillator to drive TX signal chain More...

#include <QuadratureOscillator.hxx>

Public Member Functions
	QuadratureOscillator ()
	Constructor. More...
std::complex< double >	stepOscCD ()
	step the oscillator and produce a complex double result More...
std::complex< float >	stepOscCF ()
	step the oscillator and produce a complex float result More...
double	stepOscD ()
	step the oscillator and produce a real double result More...
void	setPhaseIncr (double _pi)
	set the phase increment per step for the oscillator (1/freq) More...

Private Attributes
double	phase_incr
double	ang
int	idx

Detailed Description

sin/cos oscillator to drive TX signal chain

Definition at line 39 of file QuadratureOscillator.hxx.

Constructor & Destructor Documentation

QuadratureOscillator()

SoDa::QuadratureOscillator::QuadratureOscillator ( )

inline

Constructor.

Definition at line 44 of file QuadratureOscillator.hxx.

References ang, idx, and setPhaseIncr().

Member Function Documentation

setPhaseIncr()

void SoDa::QuadratureOscillator::setPhaseIncr ( double  _pi )

inline

set the phase increment per step for the oscillator (1/freq)

Parameters

_pi	the phase increment

Definition at line 107 of file QuadratureOscillator.hxx.

References phase_incr.

Referenced by QuadratureOscillator(), SoDa::USRPRX::set3rdLOFreq(), and SoDa::USRPTX::setCWFreq().

stepOscCD()

std::complex<double> SoDa::QuadratureOscillator::stepOscCD ( )

inline

step the oscillator and produce a complex double result

Returns

cos(ang), -sin(ang)

Note the use of sincos if we're building for linux. This is a bit faster than separate sin and cos calls.

The original scheme also did some near-angle approximation stuff but it really didn't help that much with computation time, as the oscillators account for such a small part of the total run time.

Definition at line 63 of file QuadratureOscillator.hxx.

References ang, idx, and phase_incr.

Referenced by stepOscCF(), and stepOscD().

stepOscCF()

std::complex<float> SoDa::QuadratureOscillator::stepOscCF ( )

inline

step the oscillator and produce a complex float result

Returns

cos(ang), -sin(ang)

This is a wrapper for stepOscCD

Definition at line 86 of file QuadratureOscillator.hxx.

References stepOscCD().

Referenced by SoDa::USRPTX::doCW(), and SoDa::USRPRX::doMixer().

stepOscD()

double SoDa::QuadratureOscillator::stepOscD ( )

inline

step the oscillator and produce a real double result

Returns

cos(ang)

This is a wrapper for stepOscCD

Definition at line 98 of file QuadratureOscillator.hxx.

References stepOscCD().

Member Data Documentation

ang

double SoDa::QuadratureOscillator::ang

private

Definition at line 113 of file QuadratureOscillator.hxx.

Referenced by QuadratureOscillator(), and stepOscCD().

idx

int SoDa::QuadratureOscillator::idx

private

Definition at line 114 of file QuadratureOscillator.hxx.

Referenced by QuadratureOscillator(), and stepOscCD().

phase_incr

double SoDa::QuadratureOscillator::phase_incr

private

Definition at line 112 of file QuadratureOscillator.hxx.

Referenced by setPhaseIncr(), and stepOscCD().

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

• src/QuadratureOscillator.hxx