OFDM_channel_from_file Class Reference

This is a channel model where the channel is taken from a frequency domain channel representation relevant for OFDM. The OFDM parameters of the modulation, the number of antennas and nodes are inputs to constructor. More...

#include <simulator.hpp>

Inheritance diagram for OFDM_channel_from_file:

List of all members.

Public Member Functions
	OFDM_channel_from_file (std::string filename, ivec num_ant, int Nfft, int Nc, ivec ix_all, int tx_start_sample, int rx_start_sample, double signal_scaling, double EVM=0, double EVM_RX=0, double CPE=0)
void	reset (void)
virtual void	sub_channel (uint32_t from_node_ix, uint32_t to_node_ix, uint32_t from_antenna_ix, uint32_t to_antenna_ix, double freq_tx, double freq_rx, double time, double gain_tx, double gain_rx, std::complex< short int > const *signal_in, std::complex< short int > *signal_out, uint32_t number_of_samples)
virtual void	add_noise (double gain_rx, std::complex< short int > *signal, uint32_t number_of_samples)
Public Attributes
cmat	H [max_num_nodes][max_num_nodes][max_num_ant]
double	scaling_noise

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Detailed Description

This is a channel model where the channel is taken from a frequency domain channel representation relevant for OFDM. The OFDM parameters of the modulation, the number of antennas and nodes are inputs to constructor.

Definition at line 116 of file simulator.hpp.

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Constructor & Destructor Documentation

OFDM_channel_from_file::OFDM_channel_from_file	(	std::string	filename,
		ivec	num_ant,
		int	Nfft,
		int	Nc,
		ivec	ix_all,
		int	tx_start_sample,
		int	rx_start_sample,
		double	signal_scaling,
		double	EVM = 0,
		double	EVM_RX = 0,
		double	CPE = 0
	)

The data is read from the files given by filename_frame_ix=0.dat, filename_frame_ix=1.dat, ...., where the string filename is given as input to the constructor. The file contains the matrices real(H{1,1}),imag(H{1,1})...real(H{num_nodes,1}), imag(H{num_nodes,1})...,real(H{num_nodes,num_nodes}), imag(H{num_nodes,num_nodes}). using matlab cell array notation. Each of these matrices contains a matrix (tensor) of size num_ms_ant,num_bs_ant,length(ix_all). The data is stored as doubles. The order of the matrices is given as above. Where the matrices are flattened as e.g. H{1,1}(:). The tensor H{i1,i2} represents the channel from node i1 to node i2. The notation above is that of Matlab.

Definition at line 501 of file simulator.cpp.

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Member Function Documentation

void OFDM_channel_from_file::add_noise	(	double	gain_rx,
		std::complex< short int > *	signal,
		uint32_t	number_of_samples
	)		[virtual]

The noise model.

Parameters:

gain_rx	Gain of the receiver chain.
signal	Pointer to noise-free received signal.
number_of_samples	Buffer size

Implements channel_model.

Definition at line 694 of file simulator.cpp.

void OFDM_channel_from_file::sub_channel	(	uint32_t	from_node_ix,
		uint32_t	to_node_ix,
		uint32_t	from_antenna_ix,
		uint32_t	to_antenna_ix,
		double	freq_tx,
		double	freq_rx,
		double	time,
		double	gain_tx,
		double	gain_rx,
		std::complex< short int > const *	signal_in,
		std::complex< short int > *	signal_out,
		uint32_t	number_of_samples
	)		[virtual]

Transfer function between two antennas in the system.

Parameters:

from_node_ix	Transmitter node index.
to_node_ix	Receiver node index.
from_antenna_ix	Transmitter antenna index.
to_antenna_ix	Receiver antenna index.
freq_tx	Frequency of transmitter (Hz).
freq_rx	Frequency of receiver (Hz).
time	Time in seconds.
gain_tx	Gain setting of transmitter chain.
gain_rx	Gain setting of receiver chain,
signal_in	Pointer to buffer of transmitter samples.
signal_out	Pointer to buffer of receiver samples.
number_of_samples	Buffer size.

Implements channel_model.

Definition at line 610 of file simulator.cpp.

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

• core/simulator.hpp
• core/simulator.cpp