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Commit 12a1c8a8 authored by Robert Schmidt's avatar Robert Schmidt
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Merge remote-tracking branch 'origin/rfsim_add_prop_delay' into integration_2024_w21c

parents 87a1ff5b d5a04555
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Showing with 85 additions and 100 deletions
common/config/config_common.c
View file @ 12a1c8a8
......@@ -141,7 +141,7 @@ int config_setdefault_int64(configmodule_interface_t *cfg, paramdef_t *cfgoption
config_check_valptr(cfg, cfgoptions, sizeof(*cfgoptions->i64ptr), 1);
if (((cfgoptions->paramflags & PARAMFLAG_MANDATORY) == 0)) {
*(cfgoptions->u64ptr) = cfgoptions->defuintval;
*(cfgoptions->u64ptr) = cfgoptions->defint64val;
status=1;
printf_params(cfg,
"[CONFIG] %s.%s set to default value %llu\n",
......
openair1/SIMULATION/TOOLS/multipath_channel.c
View file @ 12a1c8a8
......@@ -55,12 +55,12 @@ void __attribute__ ((no_sanitize_address)) multipath_channel(channel_desc_t *des
tx128_re, tx128_im, ch128_x, ch128_y, pathloss128;
double path_loss = pow(10,desc->path_loss_dB/20);
int dd = abs(desc->channel_offset);
uint64_t dd = desc->channel_offset;
pathloss128 = simde_mm_set1_pd(path_loss);
#ifdef DEBUG_CH
printf("[CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %d, len %d \n",keep_channel,path_loss,desc->path_loss_dB,desc->nb_rx,desc->nb_tx,dd,desc->channel_length);
printf("[CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %lu, len %d \n",keep_channel,path_loss,desc->path_loss_dB,desc->nb_rx,desc->nb_tx,dd,desc->channel_length);
#endif
if (keep_channel) {
......@@ -184,11 +184,10 @@ void __attribute__ ((no_sanitize_address)) multipath_channel(channel_desc_t *des
{
double path_loss = pow(10,desc->path_loss_dB/20);
int dd;
dd = abs(desc->channel_offset);
uint64_t dd = desc->channel_offset;
#ifdef DEBUG_CH
printf("[CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %d, len %d \n",
printf("[CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %lu, len %d \n",
keep_channel, path_loss, desc->path_loss_dB, desc->nb_rx, desc->nb_tx, dd, desc->channel_length);
#endif
......
openair1/SIMULATION/TOOLS/multipath_tv_channel.c
View file @ 12a1c8a8
......@@ -29,7 +29,7 @@
void tv_channel(channel_desc_t *desc,double complex ***H,uint32_t length);
double frand_a_b(double a, double b);
void tv_conv(double complex **h, double complex *x, double complex *y, uint32_t nb_samples, uint8_t nb_taps, int delay);
void tv_conv(double complex **h, double complex *x, double complex *y, uint32_t nb_samples, uint8_t nb_taps, uint64_t delay);
void multipath_tv_channel(channel_desc_t *desc,
double **tx_sig_re,
......@@ -42,10 +42,10 @@ void multipath_tv_channel(channel_desc_t *desc,
double complex **tx,**rx,***H_t;
double path_loss = pow(10,desc->path_loss_dB/20);
int i,j,dd;
dd = abs(desc->channel_offset);
int i,j;
uint64_t dd = desc->channel_offset;
#ifdef DEBUG_CH
printf("[TV CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %d, len %d max_doppler %g\n",keep_channel,path_loss,desc->path_loss_dB,desc->nb_rx,desc->nb_tx,dd,desc->channel_length,
printf("[TV CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %lu, len %d max_doppler %g\n",keep_channel,path_loss,desc->path_loss_dB,desc->nb_rx,desc->nb_tx,dd,desc->channel_length,
desc->max_Doppler);
#endif
tx = (double complex **)malloc(desc->nb_tx*sizeof(double complex *));
......@@ -190,7 +190,7 @@ void tv_channel(channel_desc_t *desc,double complex ***H,uint32_t length){
}
// time varying convolution
void tv_conv(double complex **h, double complex *x, double complex *y, uint32_t nb_samples, uint8_t nb_taps, int dd)
void tv_conv(double complex **h, double complex *x, double complex *y, uint32_t nb_samples, uint8_t nb_taps, uint64_t dd)
{
for(int i = 0; i < ((int)nb_samples-dd); i++) {
for(int j = 0; j < nb_taps; j++) {
......
openair1/SIMULATION/TOOLS/random_channel.c
View file @ 12a1c8a8
......@@ -76,7 +76,6 @@ static unsigned int max_chan;
static channel_desc_t **defined_channels;
static char *modellist_name;
void fill_channel_desc(channel_desc_t *chan_desc,
uint8_t nb_tx,
uint8_t nb_rx,
......@@ -92,9 +91,10 @@ void fill_channel_desc(channel_desc_t *chan_desc,
double aoa,
double forgetting_factor,
double max_Doppler,
int32_t channel_offset,
uint64_t channel_offset,
double path_loss_dB,
uint8_t random_aoa) {
uint8_t random_aoa)
{
uint16_t i,j;
double delta_tau;
LOG_I(OCM,"[CHANNEL] Getting new channel descriptor, nb_tx %d, nb_rx %d, nb_taps %d, channel_length %d\n",
......@@ -568,7 +568,7 @@ channel_desc_t *new_channel_desc_scm(uint8_t nb_tx,
double maxDoppler,
const corr_level_t corr_level,
double forgetting_factor,
int32_t channel_offset,
uint64_t channel_offset,
double path_loss_dB,
float noise_power_dB)
{
......@@ -2063,8 +2063,12 @@ static void display_channelmodel(channel_desc_t *cd,int debug, telnet_printfunc_
prnt("nb_tx: %i nb_rx: %i taps: %i bandwidth: %lf sampling: %lf\n",cd->nb_tx, cd->nb_rx, cd->nb_taps, cd->channel_bandwidth, cd->sampling_rate);
prnt("channel length: %i Max path delay: %lf ricean fact.: %lf angle of arrival: %lf (randomized:%s)\n",
cd->channel_length, cd->Td, cd->ricean_factor, cd->aoa, (cd->random_aoa?"Yes":"No"));
prnt("max Doppler: %lf path loss: %lf noise: %lf rchannel offset: %i forget factor; %lf\n",
cd->max_Doppler, cd->path_loss_dB, cd->noise_power_dB, cd->channel_offset, cd->forgetting_factor);
prnt("max Doppler: %lf path loss: %lf noise: %lf rchannel offset: %lu forget factor; %lf\n",
cd->max_Doppler,
cd->path_loss_dB,
cd->noise_power_dB,
cd->channel_offset,
cd->forgetting_factor);
prnt("Initial phase: %lf nb_path: %i \n",
cd->ip, cd->nb_paths);
......
openair1/SIMULATION/TOOLS/sim.h
View file @ 12a1c8a8
......@@ -101,7 +101,7 @@ typedef struct {
///path loss including shadow fading in dB
double path_loss_dB;
///additional delay of channel in samples.
int32_t channel_offset;
uint64_t channel_offset;
float noise_power_dB;
///This parameter (0...1) allows for simple 1st order temporal variation. 0 means a new channel every call, 1 means keep channel constant all the time
double forgetting_factor;
......@@ -307,7 +307,6 @@ typedef struct {
double ru_amp[NUMBER_OF_RU_MAX];
} sim_t;
channel_desc_t *new_channel_desc_scm(uint8_t nb_tx,
uint8_t nb_rx,
SCM_t channel_model,
......@@ -318,7 +317,7 @@ channel_desc_t *new_channel_desc_scm(uint8_t nb_tx,
double maxDoppler,
const corr_level_t corr_level,
double forgetting_factor,
int32_t channel_offset,
uint64_t channel_offset,
double path_loss_dB,
float noise_power_dB);
......
radio/rfsimulator/README.md
View file @ 12a1c8a8
......@@ -73,10 +73,11 @@ The RF simulator is using the configuration module, and its parameters are defin
|:--------------------- |:-------------------------------------------------------------------------------|----: |
|`--rfsimulator.serveraddr <addr>`| ip address to connect to, or `server` to behave as a tcp server | 127.0.0.1 |
|`--rfsimulator.serverport <port>`| port number to connect to or to listen on (eNB, which behaves as a tcp server) | 4043 |
| `--rfsimulator.options` | list of comma separated run-time options, two are supported: `chanmod`, `saviq`| all options disabled |
| `--rfsimulator.options saviq` | store IQs to a file for future replay | disabled |
|`--rfsimulator.options` | list of comma separated run-time options, two are supported: `chanmod`, `saviq`| all options disabled |
|`--rfsimulator.options saviq` | store IQs to a file for future replay | disabled |
|`--rfsimulator.options chanmod` | enable the channel model | disabled |
|`--rfsimulator.IQfile <file>` | path to a file to store the IQ samples to (only with `saviq`) | `/tmp/rfsimulator.iqs` |
|`--rfsimulator.prop_delay` | simulated receive-path (gNB: UL, UE: DL) propagation delay in ms | 0 |
|`--rfsimulator.wait_timeout` | wait timeout when no UE is connected | 1 |
Please refer to this document [`SIMULATION/TOOLS/DOC/channel_simulation.md`](../../openair1/SIMULATION/TOOLS/DOC/channel_simulation.md) for information about using the RFSimulator options to run the simulator with a channel model.
......@@ -152,6 +153,24 @@ The format intends to be compatible with the OAI store/replay feature on USRP.
Please refer to this document [`channel_simulation.md`](../../openair1/SIMULATION/TOOLS/DOC/channel_simulation.md) to get familiar with channel simulation in RFSIM and to see the list of commands for real-time usage with telnet.
## How to simulate a simple GEO satellite channel model
A simple channel model for satellites on a geostationary orbit (GEO) simulates simply one line-of-sight propagation channel.
The most basic version is to simply simulate a constant propagation delay, without any other effects.
In case of a transparent GEO satellite, the minumum one-way propagation delay (DL: gNB -> satellite -> UE, or UL: UE -> satellite -> gNB) is 238.74 ms.
So, additionally to other parameters, this parameter should be given when executing the gNB and the UE executables:
```
--rfsimulator.prop_delay 238.74
```
Note:
To successfully establish a connection with such a GEO satellite channel, both gNB and UE need to have the NTN support configured.
# Caveats
There are issues in power control: txgain/rxgain setting is not supported.
radio/rfsimulator/apply_channelmod.c
View file @ 12a1c8a8
......@@ -68,7 +68,7 @@ void rxAddInput( const c16_t *input_sig,
// Energy in one sample to calibrate input noise
// the normalized OAI value seems to be 256 as average amplitude (numerical amplification = 1)
const double noise_per_sample = pow(10,channelDesc->noise_power_dB/10.0) * 256;
const int dd = abs(channelDesc->channel_offset);
const uint64_t dd = channelDesc->channel_offset;
const int nbTx=channelDesc->nb_tx;
for (int i=0; i<nbSamples; i++) {
......
radio/rfsimulator/simulator.c
View file @ 12a1c8a8
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