gr::filter::channel_model Class Reference

channel simulator More...

#include <channel_model.h>

Inheritance diagram for gr::filter::channel_model:

List of all members.

Public Types
typedef boost::shared_ptr < channel_model >	sptr
Public Member Functions
virtual void	set_noise_voltage (double noise_voltage)=0
virtual void	set_frequency_offset (double frequency_offset)=0
virtual void	set_taps (const std::vector< gr_complex > &taps)=0
virtual void	set_timing_offset (double epsilon)=0
virtual double	noise_voltage () const =0
virtual double	frequency_offset () const =0
virtual std::vector< gr_complex >	taps () const =0
virtual double	timing_offset () const =0
Static Public Member Functions
static sptr	make (double noise_voltage=0.0, double frequency_offset=0.0, double epsilon=1.0, const std::vector< gr_complex > &taps=std::vector< gr_complex >(1, 1), double noise_seed=0)
	Build the channel simulator.

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Detailed Description

channel simulator

This block implements a basic channel model simulator that can be used to help evaluate, design, and test various signals, waveforms, and algorithms. This model allows the user to set the voltage of an AWGN noise source, a (normalized) frequency offset, a sample timing offset, and a noise seed to randomize the AWGN noise source.

Multipath can be approximated in this model by using a FIR filter representation of a multipath delay profile..

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Member Typedef Documentation

typedef boost::shared_ptr<channel_model> gr::filter::channel_model::sptr

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Member Function Documentation

virtual double gr::filter::channel_model::frequency_offset

(

)

const [pure virtual]

Implemented in gr::filter::channel_model_impl.

static sptr gr::filter::channel_model::make	(	double	noise_voltage = 0.0,
		double	frequency_offset = 0.0,
		double	epsilon = 1.0,
		const std::vector< gr_complex > &	taps = std::vector< gr_complex >(1, 1),
		double	noise_seed = 0
	)		[static]

Build the channel simulator.

Parameters:

noise_voltage	The AWGN noise level as a voltage (to be calculated externally to meet, say, a desired SNR).
frequency_offset	The normalized frequency offset. 0 is no offset; 0.25 would be, for a digital modem, one quarter of the symbol rate.
epsilon	The sample timing offset to emulate the different rates between the sample clocks of the transmitter and receiver. 1.0 is no difference.
taps	Taps of a FIR filter to emulate a multipath delay profile.
noise_seed	A random number generator seed for the noise source.

virtual double gr::filter::channel_model::noise_voltage

(

)

const [pure virtual]

Implemented in gr::filter::channel_model_impl.

virtual void gr::filter::channel_model::set_frequency_offset

(

double

frequency_offset

)

[pure virtual]

Implemented in gr::filter::channel_model_impl.

virtual void gr::filter::channel_model::set_noise_voltage

(

double

noise_voltage

)

[pure virtual]

Implemented in gr::filter::channel_model_impl.

virtual void gr::filter::channel_model::set_taps

(

const std::vector< gr_complex > &

taps

)

[pure virtual]

Implemented in gr::filter::channel_model_impl.

virtual void gr::filter::channel_model::set_timing_offset

(

double

epsilon

)

[pure virtual]

Implemented in gr::filter::channel_model_impl.

virtual std::vector<gr_complex> gr::filter::channel_model::taps

(

)

const [pure virtual]

Implemented in gr::filter::channel_model_impl.

virtual double gr::filter::channel_model::timing_offset

(

)

const [pure virtual]

Implemented in gr::filter::channel_model_impl.

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

• channel_model.h