atsci_sssr Class Reference

ATSC Segment and Symbol Sync Recovery. More...

#include <gnuradio/atsc/sssr_impl.h>

Public Member Functions
	atsci_sssr ()
	~atsci_sssr ()
void	reset ()
	call on channel change More...
void	update (sssr::sample_t sample_in, bool *seg_locked, int *symbol_index, double *timing_adjust)
	process a single sample at the ATSC symbol rate (~10.76 MSPS) More...

Detailed Description

ATSC Segment and Symbol Sync Recovery.

This class implements data segment sync tracking and symbol timing using the method described in "ATSC/VSB Tutorial - Receiver Technology" by Wayne E. Bretl of Zenith, pgs 41-45.

Constructor & Destructor Documentation

atsci_sssr::atsci_sssr

(

)

atsci_sssr::~atsci_sssr

(

)

Member Function Documentation

void atsci_sssr::reset

(

)

call on channel change

void atsci_sssr::update	(	sssr::sample_t	sample_in,
		bool *	seg_locked,
		int *	symbol_index,
		double *	timing_adjust
	)

process a single sample at the ATSC symbol rate (~10.76 MSPS)

This block computes an indication of our timing error and keeps track of where the segment sync's occur. timing_adjust is returned to indicate how the interpolator timing needs to be adjusted to track the transmitter's symbol timing. If seg_locked is true, then symbol_index is the index of this sample in the current segment. The symbols are numbered from 0 to 831, where symbols 0, 1, 2 and 3 correspond to the data segment sync pattern, nominally +5, -5, -5, +5.

---

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

• sssr_impl.h