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Add Sidelink (SL) carrier frequency

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1. Adding a "SL" frequency for Sidelink mode. The
   importance of this variable is to ensure that
   when we are in mode 1 (UE+UE+gNB), that the slot
   configuration and frequencies do not overlap. This
   SL frequency is important for rotation and allows
   us to utilize the OFDM modulation and demodulation
   functions that already exist in OAI.
2. Adding sl_mode to the command line for proper UE
   deployment when in SL mode. sl_mode can be set to 0,
   1, or 2. sl_mode 0 indicates no-Sidelink at all,
   mode 1 is gNB, UE, and UE (3GPP defines mode numbers).
   sl_mode 2 indicated UE to UE communications with no
   gNB at all.
3. New functions for calculating the carrier frequency
   for SL mode.
This commit is contained in:
Robert Schmidt
2023-06-16 11:11:44 +02:00
parent f8f9f8ac14
commit 555a54f85e
24 changed files with 159 additions and 31 deletions
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openair1/PHY/MODULATION/ofdm_mod.c
+10 -7
View File
@@ -33,6 +33,7 @@ This section deals with basic functions for OFDM Modulation.
#include "PHY/defs_eNB.h"
#include "PHY/defs_gNB.h"
#include "PHY/impl_defs_top.h"
#include "PHY/impl_defs_nr.h"
#include "common/utils/LOG/log.h"
#include "common/utils/LOG/vcd_signal_dumper.h"
#include "modulation_common.h"
@@ -337,11 +338,13 @@ void apply_nr_rotation(NR_DL_FRAME_PARMS *fp,
c16_t *txdataF,
int slot,
int first_symbol,
int nsymb)
int nsymb,
int link_type)
{
int symb_offset = (slot%fp->slots_per_subframe)*fp->symbols_per_slot;
c16_t *symbol_rotation = fp->symbol_rotation[0] + symb_offset;
c16_t *symbol_rotation = fp->symbol_rotation[link_type] + symb_offset;
int N_RB = (link_type == link_type_sl) ? fp->N_RB_SL : fp->N_RB_DL;
for (int sidx = first_symbol; sidx < first_symbol + nsymb; sidx++) {
c16_t *this_rotation = symbol_rotation + sidx;
@@ -354,20 +357,20 @@ void apply_nr_rotation(NR_DL_FRAME_PARMS *fp,
this_rotation->r,
this_rotation->i);
if (fp->N_RB_DL & 1) {
if (N_RB & 1) {
rotate_cpx_vector(this_symbol, this_rotation, this_symbol,
(fp->N_RB_DL + 1) * 6, 15);
(N_RB + 1) * 6, 15);
rotate_cpx_vector(this_symbol + fp->first_carrier_offset - 6,
this_rotation,
this_symbol + fp->first_carrier_offset - 6,
(fp->N_RB_DL + 1) * 6, 15);
(N_RB + 1) * 6, 15);
} else {
rotate_cpx_vector(this_symbol, this_rotation, this_symbol,
fp->N_RB_DL * 6, 15);
N_RB * 6, 15);
rotate_cpx_vector(this_symbol + fp->first_carrier_offset,
this_rotation,
this_symbol + fp->first_carrier_offset,
fp->N_RB_DL * 6, 15);
N_RB * 6, 15);
}
}
}