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move function add_noise() to file openair1/SIMULATION/TOOLS/phase_noise.c

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This commit is contained in:
Thomas Schlichter
2025-04-10 12:36:30 +00:00
parent b5f7d22c02
commit 9e4df97d84
3 changed files with 60 additions and 62 deletions
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openair1/SIMULATION/TOOLS/multipath_channel.c
-25
View File
@@ -143,31 +143,6 @@ void __attribute__ ((no_sanitize_address)) multipath_channel(channel_desc_t *des
#else
void add_noise(c16_t **rxdata,
const double **r_re,
const double **r_im,
const double sigma,
const int length,
const int slot_offset,
const double ts,
const int delay,
const uint16_t pdu_bit_map,
const uint16_t ptrs_bit_map,
const uint8_t nb_antennas_rx)
{
for (int i = 0; i < length; i++) {
for (int ap = 0; ap < nb_antennas_rx; ap++) {
c16_t *rxd = &rxdata[ap][slot_offset + i + delay];
rxd->r = r_re[ap][i] + sqrt(sigma / 2) * gaussZiggurat(0.0, 1.0); // convert to fixed point
rxd->i = r_im[ap][i] + sqrt(sigma / 2) * gaussZiggurat(0.0, 1.0);
/* Add phase noise if enabled */
if (pdu_bit_map & ptrs_bit_map) {
phase_noise(ts, &rxdata[ap][slot_offset + i + delay].r, &rxdata[ap][slot_offset + i + delay].i);
}
}
}
}
void __attribute__ ((no_sanitize_address)) multipath_channel(channel_desc_t *desc,
double *tx_sig_re[NB_ANTENNAS_TX],
double *tx_sig_im[NB_ANTENNAS_TX],
openair1/SIMULATION/TOOLS/phase_noise.c
+30 -5
View File
@@ -22,8 +22,14 @@
#include <math.h>
#include "sim.h"
#define ResolSinCos 100
static uint16_t LUTSin[ResolSinCos+1];
/* Initialisation function for SIN table values */
void InitSinLUT( void ) {
for ( int i=0; i<(ResolSinCos+1); i++ ) {
LUTSin[i] = sin((double)(M_PI*i)/(2*ResolSinCos)) * (1<<14); //Format: Q14
/* linear phase noise model */
void phase_noise(double ts, int16_t * InRe, int16_t * InIm)
{
@@ -61,9 +67,28 @@ void phase_noise(double ts, int16_t * InRe, int16_t * InIm)
InIm[0]= (int16_t)(y>>14);
i++;
}
/* Initialisation function for SIN table values */
void InitSinLUT( void ) {
for ( int i=0; i<(ResolSinCos+1); i++ ) {
LUTSin[i] = sin((double)(M_PI*i)/(2*ResolSinCos)) * (1<<14); //Format: Q14
void add_noise(c16_t **rxdata,
const double **r_re,
const double **r_im,
const double sigma,
const int length,
const int slot_offset,
const double ts,
const int delay,
const uint16_t pdu_bit_map,
const uint16_t ptrs_bit_map,
const uint8_t nb_antennas_rx)
{
for (int i = 0; i < length; i++) {
for (int ap = 0; ap < nb_antennas_rx; ap++) {
c16_t *rxd = &rxdata[ap][slot_offset + i + delay];
rxd->r = r_re[ap][i] + sqrt(sigma / 2) * gaussZiggurat(0.0, 1.0); // convert to fixed point
rxd->i = r_im[ap][i] + sqrt(sigma / 2) * gaussZiggurat(0.0, 1.0);
/* Add phase noise if enabled */
if (pdu_bit_map & ptrs_bit_map) {
phase_noise(ts, &rxdata[ap][slot_offset + i + delay].r, &rxdata[ap][slot_offset + i + delay].i);
}
}
}
}
openair1/SIMULATION/TOOLS/sim.h
+30 -32
View File
@@ -379,32 +379,6 @@ void get_cexp_doppler(struct complexd *cexp_doppler, channel_desc_t *chan_desc,
*/
int random_channel(channel_desc_t *desc, uint8_t abstraction_flag);
/**
\brief Add AWGN noise and phase noise if enabled
\param rxdata output data with noise
\param r_re real part of input data without noise
\param r_im imaginary part of input data without noise
\param sigma noise power
\param length number of samples to apply the noise
\param slot_offset slot offset to start applying the noise
\param ts sampling time
\param delay introduce delay in terms of number of samples
\param pdu_bit_map bitmap indicating presence of optional PDUs
\param ptrs_bit_map
\param nb_antennas_rx number of receive antennas
*/
void add_noise(c16_t **rxdata,
const double **r_re,
const double **r_im,
const double sigma,
const int length,
const int slot_offset,
const double ts,
const int delay,
const uint16_t pdu_bit_map,
const uint16_t ptrs_bit_map,
const uint8_t nb_antennas_rx);
/**\fn void multipath_channel(channel_desc_t *desc,
double tx_sig_re[NB_ANTENNAS_TX],
double tx_sig_im[NB_ANTENANS_TX],
@@ -569,17 +543,41 @@ int load_channellist(uint8_t nb_tx, uint8_t nb_rx, double sampling_rate, uint64_
double N_RB2sampling_rate(uint16_t N_RB);
double N_RB2channel_bandwidth(uint16_t N_RB);
void InitSinLUT(void);
/* Linear phase noise model */
/*!
/**
\brief This function produce phase noise and add to input signal
\param ts Sampling time
\param ts Sampling time
\param *Re *Im Real and Imag part of the signal
*/
//look-up table for the sine (cosine) function
#define ResolSinCos 100
void InitSinLUT( void );
void phase_noise(double ts, int16_t * InRe, int16_t * InIm);
void phase_noise(double ts, int16_t *InRe, int16_t *InIm);
/**
\brief Add AWGN noise and phase noise if enabled
\param rxdata output data with noise
\param r_re real part of input data without noise
\param r_im imaginary part of input data without noise
\param sigma noise power
\param length number of samples to apply the noise
\param slot_offset slot offset to start applying the noise
\param ts sampling time
\param delay introduce delay in terms of number of samples
\param pdu_bit_map bitmap indicating presence of optional PDUs
\param ptrs_bit_map
\param nb_antennas_rx number of receive antennas
*/
void add_noise(c16_t **rxdata,
const double **r_re,
const double **r_im,
const double sigma,
const int length,
const int slot_offset,
const double ts,
const int delay,
const uint16_t pdu_bit_map,
const uint16_t ptrs_bit_map,
const uint8_t nb_antennas_rx);
void do_DL_sig(sim_t *sim,
uint16_t subframe,