mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-08-28 16:56:35 -04:00
129 lines
2.5 KiB
C++
129 lines
2.5 KiB
C++
/*
|
|
* kissagc.h
|
|
*
|
|
* Created on: May 12, 2015
|
|
* Author: f4exb
|
|
*/
|
|
|
|
#ifndef INCLUDE_GPL_DSP_AGC_H_
|
|
#define INCLUDE_GPL_DSP_AGC_H_
|
|
|
|
#include "movingaverage.h"
|
|
|
|
class AGC
|
|
{
|
|
public:
|
|
|
|
AGC();
|
|
AGC(int historySize, Real R);
|
|
virtual ~AGC();
|
|
|
|
void resize(int historySize, Real R);
|
|
Real getValue();
|
|
Real getAverage();
|
|
virtual void feed(Complex& ci) = 0;
|
|
|
|
protected:
|
|
Real m_u0;
|
|
Real m_R; // objective mag
|
|
MovingAverage<Real> m_moving_average; // Averaging engine. The stack length conditions the smoothness of AGC.
|
|
int m_historySize;
|
|
int m_count;
|
|
};
|
|
|
|
class MagSquaredAGC : public AGC
|
|
{
|
|
public:
|
|
MagSquaredAGC();
|
|
MagSquaredAGC(int historySize, Real R);
|
|
virtual ~MagSquaredAGC();
|
|
virtual void feed(Complex& ci);
|
|
Real getMagSq() const { return m_magsq; }
|
|
private:
|
|
Real m_magsq;
|
|
};
|
|
|
|
class MagAGC : public AGC
|
|
{
|
|
public:
|
|
MagAGC();
|
|
MagAGC(int historySize, Real R);
|
|
virtual ~MagAGC();
|
|
virtual void feed(Complex& ci);
|
|
Real getMagSq() const { return m_magsq; }
|
|
private:
|
|
Real m_magsq;
|
|
};
|
|
|
|
class AlphaAGC : public AGC
|
|
{
|
|
public:
|
|
AlphaAGC();
|
|
AlphaAGC(int historySize, Real R);
|
|
AlphaAGC(int historySize, Real R, Real alpha);
|
|
virtual ~AlphaAGC();
|
|
void resize(int historySize, Real R, Real alpha);
|
|
virtual void feed(Complex& ci);
|
|
Real getMagSq() const { return m_magsq; }
|
|
private:
|
|
Real m_alpha;
|
|
Real m_magsq;
|
|
bool m_squelchOpen;
|
|
};
|
|
|
|
class SimpleAGC
|
|
{
|
|
public:
|
|
SimpleAGC() :
|
|
m_squelchOpen(false),
|
|
m_fill(0),
|
|
m_cutoff(0),
|
|
m_clip(0),
|
|
m_moving_average()
|
|
{}
|
|
|
|
SimpleAGC(int historySize, Real initial, Real cutoff=0, Real clip=0) :
|
|
m_squelchOpen(false),
|
|
m_fill(initial),
|
|
m_cutoff(cutoff),
|
|
m_clip(clip),
|
|
m_moving_average(historySize, initial)
|
|
{}
|
|
|
|
void resize(int historySize, Real initial, Real cutoff=0, Real clip=0)
|
|
{
|
|
m_fill = initial;
|
|
m_cutoff = cutoff;
|
|
m_clip = clip;
|
|
m_moving_average.resize(historySize, initial);
|
|
}
|
|
|
|
Real getValue()
|
|
{
|
|
if (m_moving_average.average() > m_clip)
|
|
{
|
|
return m_moving_average.average();
|
|
} else
|
|
{
|
|
return m_clip;
|
|
}
|
|
}
|
|
|
|
void feed(Real value)
|
|
{
|
|
if (value > m_cutoff)
|
|
{
|
|
m_moving_average.feed(value);
|
|
}
|
|
}
|
|
|
|
private:
|
|
bool m_squelchOpen; // open for processing
|
|
Real m_fill; // refill average at this level
|
|
Real m_cutoff; // consider samples only above this level
|
|
Real m_clip; // never go below this level
|
|
MovingAverage<Real> m_moving_average; // Averaging engine. The stack length conditions the smoothness of AGC.
|
|
};
|
|
|
|
#endif /* INCLUDE_GPL_DSP_AGC_H_ */
|