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Updated Signal Generator File

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This commit is contained in:
piyush0411 2020-06-15 18:27:27 +05:30
parent ff7affb666
commit e1af7818ce
2 changed files with 57 additions and 2 deletions
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57
src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.cc
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@ -5,7 +5,7 @@
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors)
* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
@ -22,6 +22,7 @@
#include "GPS_L1_CA.h"
#include "Galileo_E1.h"
#include "Galileo_E5a.h"
#include "Galileo_E5b.h"
#include "galileo_e1_signal_processing.h"
#include "galileo_e5_signal_processing.h"
#include "glonass_l1_signal_processing.h"
@ -124,6 +125,14 @@ void signal_generator_c::init()
data_bit_duration_ms_.push_back(1e3 / GALILEO_E5A_SYMBOL_RATE_BPS);
}
else if (signal_[sat].at(0) == '7')
{
int codelen = static_cast<int>(GALILEO_E5B_CODE_LENGTH_CHIPS);
samples_per_code_.push_back(round(static_cast<float>(fs_in_) / (GALILEO_E5B_CODE_CHIP_RATE_CPS / codelen)));
num_of_codes_per_vector_.push_back(1);
data_bit_duration_ms_.push_back(1e3 / GALILEO_E5B_SYMBOL_RATE_BPS);
}
else
{
samples_per_code_.push_back(round(static_cast<float>(fs_in_) / (GALILEO_E1_CODE_CHIP_RATE_CPS / GALILEO_E1_B_CODE_LENGTH_CHIPS)));
@ -206,6 +215,21 @@ void signal_generator_c::generate_codes()
}
}
}
else if (signal_[sat].at(0) == '7')
{
std::array<char, 3> signal = {{'7', 'X', '\0'}};
galileo_e5_b_code_gen_complex_sampled(sampled_code_data_[sat], PRN_[sat], signal, fs_in_,
static_cast<int>(GALILEO_E5B_CODE_LENGTH_CHIPS) - delay_chips_[sat]);
// noise
if (noise_flag_)
{
for (unsigned int i = 0; i < vector_length_; i++)
{
sampled_code_data_[sat][i] *= sqrt(pow(10, CN0_dB_[sat] / 10) / BW_BB_ / 2);
}
}
}
else
{
// Generate one code-period of E1B signal
@ -370,6 +394,37 @@ int signal_generator_c::general_work(int noutput_items __attribute__((unused)),
ms_counter_[sat] = ms_counter_[sat] + static_cast<int>(round(1e3 * GALILEO_E5A_CODE_PERIOD_S));
for (k = delay_samples; k < samples_per_code_[sat]; k++)
{
out[out_idx] += (gr_complex(sampled_code_data_[sat][out_idx].real() * data_modulation_[sat],
sampled_code_data_[sat][out_idx].imag() * pilot_modulation_[sat])) *
complex_phase_[out_idx];
out_idx++;
}
}
if (signal_[sat].at(0) == '7')
{
// EACH WORK outputs 1 modulated primary code
int codelen = static_cast<int>(GALILEO_E5B_CODE_LENGTH_CHIPS);
unsigned int delay_samples = (delay_chips_[sat] % codelen) * samples_per_code_[sat] / codelen;
for (k = 0; k < delay_samples; k++)
{
out[out_idx] += (gr_complex(sampled_code_data_[sat][out_idx].real() * data_modulation_[sat],
sampled_code_data_[sat][out_idx].imag() * pilot_modulation_[sat])) *
complex_phase_[out_idx];
out_idx++;
}
if (ms_counter_[sat] % data_bit_duration_ms_[sat] == 0 && data_flag_)
{
// New random data bit
current_data_bit_int_[sat] = (uniform_dist(e1) % 2) == 0 ? 1 : -1;
}
data_modulation_[sat] = current_data_bit_int_[sat] * (GALILEO_E5B_I_SECONDARY_CODE.at((ms_counter_[sat] + delay_sec_[sat]) % 20) == '0' ? 1 : -1);
pilot_modulation_[sat] = (GALILEO_E5B_Q_SECONDARY_CODE[PRN_[sat] - 1].at((ms_counter_[sat] + delay_sec_[sat]) % 100) == '0' ? 1 : -1);
ms_counter_[sat] = ms_counter_[sat] + static_cast<int>(round(1e3 * GALILEO_E5B_CODE_PERIOD_S));
for (k = delay_samples; k < samples_per_code_[sat]; k++)
{
out[out_idx] += (gr_complex(sampled_code_data_[sat][out_idx].real() * data_modulation_[sat],

2
src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.h
View File

@ -5,7 +5,7 @@
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors)
* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver