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analog beamforming based distributed antenna system

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This commit is contained in:
francescomani
2025-06-10 12:11:49 +02:00
parent 964c737b7d
commit f555bf2957
13 changed files with 59 additions and 38 deletions
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executables/nr-ru.c
+18 -19
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@@ -846,7 +846,6 @@ void tx_rf(RU_t *ru, int frame,int slot, uint64_t timestamp)
static void fill_rf_config(RU_t *ru, char *rf_config_file)
{
int i;
NR_DL_FRAME_PARMS *fp = ru->nr_frame_parms;
nfapi_nr_config_request_scf_t *config = &ru->config; //tmp index
openair0_config_t *cfg = &ru->openair0_cfg;
@@ -872,13 +871,13 @@ static void fill_rf_config(RU_t *ru, char *rf_config_file)
AssertFatal(ru->nb_rx > 0 && ru->nb_rx <= 8, "openair0 does not support more than 8 antennas\n");
cfg->Mod_id = 0;
cfg->num_rb_dl=N_RB;
cfg->tx_num_channels=ru->nb_tx;
cfg->rx_num_channels=ru->nb_rx;
cfg->num_rb_dl = N_RB;
cfg->tx_num_channels = ru->nb_tx * ru->num_beams_period;
cfg->rx_num_channels = ru->nb_rx * ru->num_beams_period;
LOG_I(PHY,"Setting RF config for N_RB %d, NB_RX %d, NB_TX %d\n",cfg->num_rb_dl,cfg->rx_num_channels,cfg->tx_num_channels);
LOG_I(PHY,"tune_offset %.0f Hz, sample_rate %.0f Hz\n",cfg->tune_offset,cfg->sample_rate);
for (i=0; i<ru->nb_tx; i++) {
for (int i = 0; i < ru->nb_tx * ru->num_beams_period; i++) {
if (ru->if_frequency == 0) {
cfg->tx_freq[i] = (double)fp->dl_CarrierFreq;
} else if (ru->if_freq_offset) {
@@ -893,7 +892,7 @@ static void fill_rf_config(RU_t *ru, char *rf_config_file)
i, cfg->tx_gain[i],cfg->tx_freq[i]);
}
for (i=0; i<ru->nb_rx; i++) {
for (int i = 0; i < ru->nb_rx * ru->num_beams_period; i++) {
if (ru->if_frequency == 0) {
cfg->rx_freq[i] = (double)fp->ul_CarrierFreq;
} else if (ru->if_freq_offset) {
@@ -939,8 +938,8 @@ static void fill_split7_2_config(split7_config_t *split7, const nfapi_nr_config_
Each rf chain is is addressed by the card number and the chain on the card. The
rf_map specifies for each antenna port, on which rf chain the mapping should start. Multiple
antennas are mapped to successive RF chains on the same card. */
int setup_RU_buffers(RU_t *ru) {
int i,j;
int setup_RU_buffers(RU_t *ru)
{
int card,ant;
//uint16_t N_TA_offset = 0;
NR_DL_FRAME_PARMS *fp;
@@ -962,27 +961,27 @@ int setup_RU_buffers(RU_t *ru) {
if (ru->openair0_cfg.mmapped_dma == 1) {
// replace RX signal buffers with mmaped HW versions
for (i=0; i<ru->nb_rx; i++) {
card = i/4;
ant = i%4;
for (int i = 0; i < ru->nb_rx * ru->num_beams_period; i++) {
card = i / 4;
ant = i % 4;
LOG_D(PHY, "Mapping RU id %u, rx_ant %d, on card %d, chain %d\n", ru->idx, i, ru->rf_map.card + card, ru->rf_map.chain + ant);
free(ru->common.rxdata[i]);
ru->common.rxdata[i] = ru->openair0_cfg.rxbase[ru->rf_map.chain + ant];
for (j = 0; j < 16; j++) {
ru->common.rxdata[i][j] = 16-j;
for (int j = 0; j < 16; j++) {
ru->common.rxdata[i][j] = 16 - j;
}
}
for (i=0; i<ru->nb_tx; i++) {
card = i/4;
ant = i%4;
for (int i = 0; i < ru->nb_tx * ru->num_beams_period; i++) {
card = i / 4;
ant = i % 4;
LOG_D(PHY, "Mapping RU id %u, tx_ant %d, on card %d, chain %d\n", ru->idx, i, ru->rf_map.card + card, ru->rf_map.chain + ant);
free(ru->common.txdata[i]);
ru->common.txdata[i] = ru->openair0_cfg.txbase[ru->rf_map.chain + ant];
for (j = 0; j < 16; j++) {
ru->common.txdata[i][j] = 16-j;
for (int j = 0; j < 16; j++) {
ru->common.txdata[i][j] = 16 - j;
}
}
} else { // not memory-mapped DMA
@@ -1049,7 +1048,7 @@ void ru_tx_func(void *param)
ru->fh_north_out(ru);
} else {
if(frame_tx == print_frame) {
for (int i=0; i<ru->nb_tx; i++) {
for (int i = 0; i < ru->nb_tx * ru->num_beams_period; i++) {
if(slot_tx == 0) {
sprintf(filename,"gNBdataF_frame%d_sl%d.m", print_frame, slot_tx);
LOG_M(filename,"txdataF_frame",&ru->gNB_list[0]->common_vars.txdataF[i][0],fp->samples_per_frame_wCP, 1, 1);