test_tx.cpp File Reference

Transmitter test. More...

#include "stdio.h"
#include "stdlib.h"
#include "time.h"
#include <iostream>
#include "transmitter.h"

Go to the source code of this file.

Functions
void	test_tx (double freq, double sample_rate, double tx_gain, double amp, Rate phy_rate)
	Function for testing the fun_ofdm transmitter. More...
int	main (int argc, char *argv[])

Variables
double	freq = 5.72e9
double	sample_rate = 5e6
double	tx_gain = 30
double	amp = 0.5
Rate	phy_rate = RATE_1_2_BPSK

Detailed Description

Transmitter test.

This file is used to test transmitting OFDM PHY frames over the air.

Definition in file test_tx.cpp.

Function Documentation

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 24 of file test_tx.cpp.

References amp, freq, phy_rate, sample_rate, test_tx(), and tx_gain.

                                 {

    std::cout << "Testing transmit chain..." << std::endl;
    test_tx(freq, sample_rate, tx_gain, amp, phy_rate);

    return 0;
}

void test_tx	(	double	freq,
		double	sample_rate,
		double	tx_gain,
		double	amp,
		Rate	phy_rate
	)

Function for testing the fun_ofdm transmitter.

Parameters

freq	Center Frequency
sample_rate	Sample Rate
tx_gain	Transmitter Gain
amp	Transmit Amplitude
phy_rate	The PHY Rate used for all packets in this tx test

This function transmits 1000 packets. The data in the transmitted packets is mostly random except for the first, middle, and last 100 bytes which are a known string. This string is used to verify that the packet was in fact received along with the IEEE CRC-32 check.

Definition at line 45 of file test_tx.cpp.

References fun::RateParams::name, and fun::transmitter::send_packet().

Referenced by main().

{
    srand(time(NULL)); //Initialize random seed

    transmitter tx = transmitter(freq, sample_rate, tx_gain, amp);
    std::string known_string("This known string is used to verify the correctness of the received data along with the IEEE CRC-32!");

    int num_packets = 1000;
    int packet_length = 1500;
    std::vector<std::vector<unsigned char> > packets(num_packets, std::vector<unsigned char>(packet_length));

    // Build all the packets
    for(int i = 0; i < num_packets; i++)
    {
        //Insert the known string in the beginning, middle, and end with random data inbetween
        memcpy(&packets[i][0], &known_string[0], known_string.length());
        for(int j = 100; j < 1000; j++) packets[i][j] = (unsigned char) rand() % 256;
        memcpy(&packets[i][1000], &known_string[0], known_string.length());
        for(int j = 1100; j < 1400; j++) packets[i][j] = (unsigned char) rand() % 256;
        memcpy(&packets[i][1400], &known_string[0], known_string.length());
    }

    //Transmit all the packets
    std::string tx_phy_rate = RateParams(phy_rate).name;
    for(int i = 0; i < num_packets; i++)
    {
        std::cout << "Sending packet " << i + 1 << " of " << num_packets << " at " << tx_phy_rate << std::endl;
        tx.send_packet(packets[i], phy_rate);
    }

}

Variable Documentation

double amp = 0.5

Definition at line 21 of file test_tx.cpp.

double freq = 5.72e9

Definition at line 17 of file test_tx.cpp.

Rate phy_rate = RATE_1_2_BPSK

Definition at line 22 of file test_tx.cpp.

double sample_rate = 5e6

Definition at line 18 of file test_tx.cpp.

double tx_gain = 30

Definition at line 19 of file test_tx.cpp.