gr::satellites::time_dependent_delay Class Reference

Applies a time-dependent group delay by using a delay vs. time textfile. More...

#include <time_dependent_delay.h>

Inheritance diagram for gr::satellites::time_dependent_delay:

Public Types
typedef std::shared_ptr< time_dependent_delay >	sptr

Public Member Functions
virtual void	set_time (double t)=0
	Sets the current time.
virtual double	time ()=0
	Returns the current time.
virtual double	delay ()=0
	Returns the current delay in seconds.

Static Public Member Functions
static sptr	make (const std::string &filename, double samp_rate, double t0, const std::vector< float > &taps, int num_filters)
	Build the Time-dependent Delay block.

Detailed Description

Applies a time-dependent group delay by using a delay vs. time textfile.

This block is similar to the Doppler Correction block, in the sense that it uses a text file that lists a time series of delay vs. time. The format of this text file is very similar to the one used by Doppler Correction. Each line of the file contains a timestamp and a delay. The format of the timestamp is the same as for Doppler correction. The delay is given in seconds.

Like the Doppler Correction block, this block can use time tags to update its internal timestamp.

The block interpolates the delay linearly for each sample, and uses a polyphase filterbank to apply the appropriate delay.

Member Typedef Documentation

sptr

typedef std::shared_ptr<time_dependent_delay> gr::satellites::time_dependent_delay::sptr

Member Function Documentation

delay()

virtual double gr::satellites::time_dependent_delay::delay ( )

pure virtual

Returns the current delay in seconds.

Implemented in gr::satellites::time_dependent_delay_impl.

make()

sptr gr::satellites::time_dependent_delay::make ( const std::string & filename, double samp_rate, double t0, const std::vector< float > & taps, int num_filters )

static

Build the Time-dependent Delay block.

Parameters

filename	Path of the text file describing the delay vs. time data
samp_rate	Sample rate
t0	Timestamp corresponding to the first sample
taps	Taps for the fractional delay polyphase filterbank
num_filters	Number of filters in the polyphase filterbank

set_time()

virtual void gr::satellites::time_dependent_delay::set_time ( double t )

pure virtual

Sets the current time.

Parameters

t	Tiemstamp corresponding to the current time.

Implemented in gr::satellites::time_dependent_delay_impl.

References t.

time()

virtual double gr::satellites::time_dependent_delay::time ( )

pure virtual

Returns the current time.

Implemented in gr::satellites::time_dependent_delay_impl.

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

• time_dependent_delay.h