SPUC::timing_nco Class Reference

A NCO for symbol recovery in a variable rate QPSK receiver. More...

#include <timing_nco.h>

Public Member Functions
	timing_nco (void)
void	set_frequency (unsigned long freq)
void	reset_frequency (unsigned long freq)
float_type	get_off1 (void)
float_type	get_off2 (void)
long	get_phase1 (void)
long	get_phase2 (void)
long	run (long loop_filter_out=0, int load=1)
signed long	residual_phase (signed long acc_value)

Protected Attributes
signed long	resid1
signed long	acc
unsigned long	fcw
unsigned long	new_fcw
signed long	phase1
signed long	phase2
signed long	new_phase
long	sample2

Detailed Description

A NCO for symbol recovery in a variable rate QPSK receiver.

Since interpolation is being done, either one or two samples must be calculated on each update. When sample2 is true, there are 2 samples available.

Author

Tony Kirke, Copyright(c) 2001

Tony Kirke

Constructor & Destructor Documentation

SPUC::timing_nco::timing_nco ( void  )

inline

References MASK_LOd2.

Member Function Documentation

float_type SPUC::timing_nco::get_off1 ( void  )

inline

References MASK_LO.

Referenced by SPUC::resampler< SPUC::complex< CNumeric > >::update().

float_type SPUC::timing_nco::get_off2 ( void  )

inline

References MASK_LO.

Referenced by SPUC::resampler< SPUC::complex< CNumeric > >::update().

long SPUC::timing_nco::get_phase1 ( void  )

inline

References MAX_STEP.

long SPUC::timing_nco::get_phase2 ( void  )

inline

References MAX_STEP.

void SPUC::timing_nco::reset_frequency ( unsigned long  freq )

inline

signed long SPUC::timing_nco::residual_phase

(

signed long

acc_value

)

References BITS_USED, and STEP_BITS.

Referenced by run().

long SPUC::timing_nco::run	(	long	loop_filter_out = 0,
		int	load = 1
	)

References acc, fcw, MASK_HI, MASK_HIx, MASK_LO, MASK_LOd2, new_fcw, phase1, phase2, resid1, residual_phase(), and sample2.

Referenced by SPUC::resampler< SPUC::complex< CNumeric > >::update().

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void SPUC::timing_nco::set_frequency ( unsigned long  freq )

inline

Member Data Documentation

signed long SPUC::timing_nco::acc

protected

Referenced by run().

unsigned long SPUC::timing_nco::fcw

protected

Referenced by run().

unsigned long SPUC::timing_nco::new_fcw

protected

Referenced by run().

signed long SPUC::timing_nco::new_phase

protected

signed long SPUC::timing_nco::phase1

protected

Referenced by run().

signed long SPUC::timing_nco::phase2

protected

Referenced by run().

signed long SPUC::timing_nco::resid1

protected

Referenced by run().

long SPUC::timing_nco::sample2

protected

Referenced by run().

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

• timing_nco.h
• timing_nco.cpp