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

Loop Filter for use in PLL circuits. More...

#include <loop_filter.h>

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

Public Types
typedef unquantized_mixed_type < Numeric, Coeff >::dtype	k_type
	Accumulator for k1 branch (should not be written to) More...

Public Member Functions
	loop_filter (void)
	Constructor. More...
void	reset (void)
	Reset. More...
Numeric	update (Numeric error)
	Normal call with input, returns output. More...

Public Attributes
long	k0_en
	enable first order branch More...
long	k1_en
	enable second order branch More...
Coeff	k0
	First order gain. More...
Coeff	k1
	second order gain More...
k_type	k1_acc

Protected Attributes
Numeric	loop_out
k_type	k1_prod
k_type	k0_prod

Detailed Description

template<class Numeric, class Coeff = double>
class SPUC::loop_filter< Numeric, Coeff >

Loop Filter for use in PLL circuits.

Template for 2nd order loop filter (for timing/carrier recovery, etc). Either branch can be enabled/disabled for 1st/2nd order operation There is no overflow protection on accumulator. Gains are not normalized.

Author

Tony Kirke

Member Typedef Documentation

template<class Numeric, class Coeff = double>

typedef unquantized_mixed_type<Numeric,Coeff>::dtype SPUC::loop_filter< Numeric, Coeff >::k_type

Accumulator for k1 branch (should not be written to)

Constructor & Destructor Documentation

template<class Numeric, class Coeff = double>

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

inline

Constructor.

Member Function Documentation

template<class Numeric, class Coeff = double>

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

inline

Reset.

Referenced by SPUC::loop_filter< Numeric >::loop_filter(), and SPUC::qpsk< Numeric >::reset().

template<class Numeric, class Coeff = double>

Numeric SPUC::loop_filter< Numeric, Coeff >::update ( Numeric  error )

inline

Normal call with input, returns output.

Referenced by SPUC::qpsk< Numeric >::clock(), and SPUC::qpsk_variable< Numeric >::clock().

Member Data Documentation

template<class Numeric, class Coeff = double>

Coeff SPUC::loop_filter< Numeric, Coeff >::k0

First order gain.

Referenced by SPUC::sim_qpsk_variable< Numeric >::loop_init(), SPUC::qpsk< Numeric >::qpsk(), and SPUC::qpsk_variable< Numeric >::qpsk_variable().

template<class Numeric, class Coeff = double>

long SPUC::loop_filter< Numeric, Coeff >::k0_en

enable first order branch

Referenced by SPUC::qpsk< Numeric >::qpsk(), SPUC::qpsk_variable< Numeric >::qpsk_variable(), and SPUC::loop_filter< Numeric >::update().

template<class Numeric, class Coeff = double>

k_type SPUC::loop_filter< Numeric, Coeff >::k0_prod

protected

template<class Numeric, class Coeff = double>

Coeff SPUC::loop_filter< Numeric, Coeff >::k1

second order gain

Referenced by SPUC::sim_qpsk_variable< Numeric >::loop_init(), SPUC::qpsk< Numeric >::qpsk(), and SPUC::qpsk_variable< Numeric >::qpsk_variable().

template<class Numeric, class Coeff = double>

k_type SPUC::loop_filter< Numeric, Coeff >::k1_acc

template<class Numeric, class Coeff = double>

long SPUC::loop_filter< Numeric, Coeff >::k1_en

enable second order branch

Referenced by SPUC::qpsk< Numeric >::qpsk(), SPUC::qpsk_variable< Numeric >::qpsk_variable(), and SPUC::loop_filter< Numeric >::update().

template<class Numeric, class Coeff = double>

k_type SPUC::loop_filter< Numeric, Coeff >::k1_prod

protected

Referenced by SPUC::loop_filter< Numeric >::update().

template<class Numeric, class Coeff = double>

Numeric SPUC::loop_filter< Numeric, Coeff >::loop_out

protected

---

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

• loop_filter.h