PSBCH RX TX and SLSS search procedures

	- RX/TX Phy processing accg to 38.211, 38.212 Rel16
	- PSBCH simulator used to validate TX/RX phy processing
	- PSBCH SLSS Search procedures
	- PSBCH SIM also tests SLSS SEARCH

CMakeLists.txt

@@ -718,6 +718,7 @@ target_link_libraries(SCHED_UE_LIB PRIVATE asn1_lte_rrc_hdrs asn1_nr_rrc_hdrs)
 
 set(SCHED_SRC_NR_UE
   ${OPENAIR1_DIR}/SCHED_NR_UE/phy_procedures_nr_ue.c
+  ${OPENAIR1_DIR}/SCHED_NR_UE/phy_procedures_nr_ue_sl.c
   ${OPENAIR1_DIR}/SCHED_NR_UE/fapi_nr_ue_l1.c
   ${OPENAIR1_DIR}/SCHED_NR_UE/phy_frame_config_nr_ue.c
   ${OPENAIR1_DIR}/SCHED_NR_UE/harq_nr.c
@@ -1085,8 +1086,11 @@ set(PHY_SRC_UE
   ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/sss_nr.c
   ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/cic_filter_nr.c
   ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/nr_initial_sync.c
+  ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/nr_initial_sync_sl.c
   ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/nr_ue_rf_helpers.c
   ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/nr_pbch.c
+  ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/nr_psbch_rx.c
+  ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/nr_psbch_tx.c
   ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/nr_dlsch_demodulation.c
   ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/nr_ulsch_coding.c
   ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/nr_dlsch_decoding.c
@@ -2238,6 +2242,22 @@ target_link_libraries(nr_pbchsim PRIVATE
 )
 target_link_libraries(nr_pbchsim PRIVATE asn1_nr_rrc_hdrs asn1_lte_rrc_hdrs)
 
+add_executable(nr_psbchsim
+  ${OPENAIR1_DIR}/SIMULATION/NR_PHY/psbchsim.c
+  ${OPENAIR1_DIR}/SIMULATION/NR_PHY/nr_dummy_functions.c
+  ${OPENAIR_DIR}/common/utils/nr/nr_common.c
+  ${OPENAIR_DIR}/executables/softmodem-common.c
+  ${OPENAIR2_DIR}/RRC/NAS/nas_config.c
+  ${NR_UE_RRC_DIR}/rrc_nsa.c
+  ${NFAPI_USER_DIR}/nfapi.c
+  ${NFAPI_USER_DIR}/gnb_ind_vars.c
+  ${PHY_INTERFACE_DIR}/queue_t.c
+  )
+target_link_libraries(nr_psbchsim PRIVATE
+  -Wl,--start-group UTIL SIMU SIMU_ETH PHY_COMMON PHY_NR_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB SCHED_NR_UE_LIB MAC_UE_NR MAC_NR_COMMON CONFIG_LIB L2_NR -lz -Wl,--end-group
+  m pthread ${T_LIB} ITTI dl shlib_loader
+  )
+target_link_libraries(nr_psbchsim PRIVATE asn1_nr_rrc_hdrs asn1_lte_rrc_hdrs)
 
 #PUCCH ---> Prashanth
 add_executable(nr_pucchsim

cmake_targets/autotests/test_case_list.xml

@@ -529,4 +529,16 @@
       <search_expr_false>segmentation fault|assertion|exiting|fatal</search_expr_false>
       <nruns>3</nruns>
     </testCase>
+
+    <testCase id="NR-Sidelink">
+      <desc>NR-Sidelink Test cases. (Test1: SLSS Search),
+                                    (Test2: PSBCH TxRx)</desc>
+      <main_exec>nr_psbchsim</main_exec>
+      <main_exec_args>-I
+                      -n 10</main_exec_args>
+      <tags>test1 test2</tags>
+      <search_expr_true>PSBCH test OK</search_expr_true>
+      <search_expr_false>segmentation fault|assertion|exiting|fatal</search_expr_false>
+      <nruns>3</nruns>
+    </testCase>
   </testCaseList>

cmake_targets/build_oai

@@ -324,7 +324,7 @@ function main() {
        -P | --phy_simulators)
             SIMUS_PHY=1
             # TODO: fix: dlsim_tm4 pucchsim prachsim pdcchsim pbchsim mbmssim
-            TARGET_LIST="$TARGET_LIST dlsim ulsim ldpctest polartest smallblocktest nr_pbchsim nr_dlschsim nr_ulschsim nr_dlsim nr_ulsim nr_pucchsim nr_prachsim"
+            TARGET_LIST="$TARGET_LIST dlsim ulsim ldpctest polartest smallblocktest nr_pbchsim nr_dlschsim nr_ulschsim nr_dlsim nr_ulsim nr_pucchsim nr_prachsim nr_psbchsim"
             echo_info "Will compile dlsim, ulsim, ..."
             shift;;
        -s | --check)

openair1/PHY/CODING/nrPolar_tools/nr_polar_psbch_defs.h

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+/*! \file /PHY/CODING/nrPolar_tools/nr_polar_psbch_defs.h
+ \brief Polar definitions required for Sidelink PSBCH
+ \author
+ \date
+ \version
+ \company: Fraunhofer
+ \email:
+ \note
+ \warning
+*/
+
+#ifndef __NR_POLAR_PSBCH_DEFS__H__
+#define __NR_POLAR_PSBCH_DEFS__H__
+
+//PSBCH related polar parameters.
+
+//PSBCH symbols sent in 11RBS, 9 symbols. 11*9*(12-3(for DMRS))*2bits = 1782 bits
+#define SL_NR_POLAR_PSBCH_E_NORMAL_CP 1782
+//PSBCH symbols sent in 11RBS, 7 symbols. 11*7*(12-3(for DMRS))*2bits = 1386 bits
+#define SL_NR_POLAR_PSBCH_E_EXT_CP 1386
+// SL_NR_POLAR_PSBCH_E_NORMAL_CP/32
+#define SL_NR_POLAR_PSBCH_E_DWORD 56
+
+#define SL_NR_POLAR_PSBCH_MESSAGE_TYPE (NR_POLAR_UCI_PUCCH_MESSAGE_TYPE + 1)
+#define SL_NR_POLAR_PSBCH_PAYLOAD_BITS 32
+#define SL_NR_POLAR_PSBCH_AGGREGATION_LEVEL 0
+#define SL_NR_POLAR_PSBCH_N_MAX 9
+#define SL_NR_POLAR_PSBCH_I_IL 1
+#define SL_NR_POLAR_PSBCH_I_SEG 0
+#define SL_NR_POLAR_PSBCH_N_PC 0
+#define SL_NR_POLAR_PSBCH_N_PC_WM 0
+#define SL_NR_POLAR_PSBCH_I_BIL 0
+#define SL_NR_POLAR_PSBCH_CRC_PARITY_BITS 24
+#define SL_NR_POLAR_PSBCH_CRC_ERROR_CORRECTION_BITS 3
+
+#endif

openair1/PHY/CODING/nr_polar_init.c

@@ -32,6 +32,7 @@
 
 #include "PHY/CODING/nrPolar_tools/nr_polar_defs.h"
 #include "PHY/NR_TRANSPORT/nr_dci.h"
+#include "nrPolar_tools/nr_polar_psbch_defs.h"
 
 #define PolarKey ((messageType<<24)|(messageLength<<8)|aggregation_level)
 static t_nrPolar_params * PolarList=NULL;
@@ -191,7 +192,19 @@ t_nrPolar_params *nr_polar_params(int8_t messageType, uint16_t messageLength, ui
     newPolarInitNode->payloadBits = messageLength;
     newPolarInitNode->crcCorrectionBits = NR_POLAR_PUCCH_CRC_ERROR_CORRECTION_BITS;
     //LOG_D(PHY,"New polar node, encoderLength %d, aggregation_level %d\n",newPolarInitNode->encoderLength,aggregation_level);
-
+  } else if (messageType == SL_NR_POLAR_PSBCH_MESSAGE_TYPE) { //PSBCH
+    newPolarInitNode->n_max = SL_NR_POLAR_PSBCH_N_MAX;
+    newPolarInitNode->i_il = SL_NR_POLAR_PSBCH_I_IL;
+    newPolarInitNode->i_seg = SL_NR_POLAR_PSBCH_I_SEG;
+    newPolarInitNode->n_pc = SL_NR_POLAR_PSBCH_N_PC;
+    newPolarInitNode->n_pc_wm = SL_NR_POLAR_PSBCH_N_PC_WM;
+    newPolarInitNode->i_bil = SL_NR_POLAR_PSBCH_I_BIL;
+    newPolarInitNode->crcParityBits = SL_NR_POLAR_PSBCH_CRC_PARITY_BITS;
+    newPolarInitNode->payloadBits = SL_NR_POLAR_PSBCH_PAYLOAD_BITS;
+    newPolarInitNode->encoderLength = SL_NR_POLAR_PSBCH_E_NORMAL_CP + 2;
+    newPolarInitNode->crcCorrectionBits = SL_NR_POLAR_PSBCH_CRC_ERROR_CORRECTION_BITS;
+    newPolarInitNode->crc_generator_matrix = crc24c_generator_matrix(newPolarInitNode->payloadBits);//G_P
+    LOG_D(PHY,"SIDELINK: Initializing polar parameters for PSBCH (K %d, E %d)\n",newPolarInitNode->payloadBits,newPolarInitNode->encoderLength);
   } else {
     AssertFatal(1 == 0, "[nr_polar_init] Incorrect Message Type(%d)", messageType);
   }

openair1/PHY/INIT/nr_init_ue.c

@@ -32,7 +32,6 @@
 #include "PHY/NR_REFSIG/ul_ref_seq_nr.h"
 #include "PHY/NR_REFSIG/refsig_defs_ue.h"
 #include "PHY/NR_REFSIG/nr_refsig.h"
-#include "PHY/MODULATION/nr_modulation.h"
 #include "openair2/COMMON/prs_nr_paramdef.h"
 #include "SCHED_NR_UE/harq_nr.h"
 
@@ -384,6 +383,16 @@ int init_nr_ue_signal(PHY_VARS_NR_UE *ue, int nb_connected_gNB)
   return 0;
 }
 
+static void sl_ue_free(PHY_VARS_NR_UE *UE)
+{
+
+  if (UE->SL_UE_PHY_PARAMS.init_params.sl_pss_for_correlation) {
+    free_and_zero(UE->SL_UE_PHY_PARAMS.init_params.sl_pss_for_correlation[0]);
+    free_and_zero(UE->SL_UE_PHY_PARAMS.init_params.sl_pss_for_correlation[1]);
+    free_and_zero(UE->SL_UE_PHY_PARAMS.init_params.sl_pss_for_correlation);
+  }
+}
+
 void term_nr_ue_signal(PHY_VARS_NR_UE *ue, int nb_connected_gNB)
 {
   const NR_DL_FRAME_PARMS* fp = &ue->frame_parms;
@@ -489,6 +498,8 @@ void term_nr_ue_signal(PHY_VARS_NR_UE *ue, int nb_connected_gNB)
 
     free_and_zero(ue->prs_vars[idx]);
   }
+
+  sl_ue_free(ue);
 }
 
 void free_nr_ue_dl_harq(NR_DL_UE_HARQ_t harq_list[2][NR_MAX_DLSCH_HARQ_PROCESSES], int number_of_processes, int num_rb) {
@@ -702,3 +713,36 @@ void phy_term_nr_top(void)
   free_ul_reference_signal_sequences();
   free_context_synchro_nr();
 }
+
+void sl_ue_phy_init(PHY_VARS_NR_UE *UE)
+{
+
+  uint16_t scaling_value = ONE_OVER_SQRT2_Q15;
+
+  NR_DL_FRAME_PARMS *sl_fp = &UE->SL_UE_PHY_PARAMS.sl_frame_params;
+
+  if (!UE->SL_UE_PHY_PARAMS.init_params.sl_pss_for_correlation) {
+    UE->SL_UE_PHY_PARAMS.init_params.sl_pss_for_correlation = (int32_t **)malloc16_clear(SL_NR_NUM_IDs_IN_PSS *sizeof(int32_t *) );
+    UE->SL_UE_PHY_PARAMS.init_params.sl_pss_for_correlation[0] = (int32_t *)malloc16_clear( sizeof(int32_t)*sl_fp->ofdm_symbol_size);
+    UE->SL_UE_PHY_PARAMS.init_params.sl_pss_for_correlation[1] = (int32_t *)malloc16_clear( sizeof(int32_t)*sl_fp->ofdm_symbol_size);
+  }
+  LOG_I(PHY, "SIDELINK INIT: GENERATE PSS, SSS, GOLD SEQUENCES AND PSBCH DMRS SEQUENCES FOR ALL possible SLSS IDs 0- 671\n");
+
+  // Generate PSS sequences for IDs 0,1 used in PSS
+  sl_generate_pss(&UE->SL_UE_PHY_PARAMS.init_params,0, scaling_value);
+  sl_generate_pss(&UE->SL_UE_PHY_PARAMS.init_params,1, scaling_value);
+
+  // Generate psbch dmrs Gold Sequences and modulated dmrs symbols
+  sl_init_psbch_dmrs_gold_sequences(UE);
+  for (int slss_id = 0; slss_id < SL_NR_NUM_SLSS_IDs; slss_id++) {
+    sl_generate_psbch_dmrs_qpsk_sequences(UE, UE->SL_UE_PHY_PARAMS.init_params.psbch_dmrs_modsym[slss_id], slss_id);
+    sl_generate_sss(&UE->SL_UE_PHY_PARAMS.init_params, slss_id, scaling_value);
+  }
+
+  // Generate PSS time domain samples used for correlation during SLSS reception.
+  sl_generate_pss_ifft_samples(&UE->SL_UE_PHY_PARAMS, &UE->SL_UE_PHY_PARAMS.init_params);
+
+  init_symbol_rotation(sl_fp);
+  init_timeshift_rotation(sl_fp);
+}
+

openair1/PHY/INIT/nr_parms.c

@@ -425,7 +425,8 @@ void nr_dump_frame_parms(NR_DL_FRAME_PARMS *fp)
   LOG_I(PHY,"fp->samples_per_frame=%d\n",fp->samples_per_frame);
   LOG_I(PHY,"fp->dl_CarrierFreq=%lu\n",fp->dl_CarrierFreq);
   LOG_I(PHY,"fp->ul_CarrierFreq=%lu\n",fp->ul_CarrierFreq);
+  LOG_I(PHY,"fp->Nid_cell=%d\n",fp->Nid_cell);
+  LOG_I(PHY,"fp->first_carrier_offset=%d\n",fp->first_carrier_offset);
+  LOG_I(PHY,"fp->ssb_start_subcarrier=%d\n",fp->ssb_start_subcarrier);
 }
 
-
-

openair1/PHY/INIT/nr_phy_init.h

@@ -61,4 +61,5 @@ void init_delay_table(uint16_t ofdm_symbol_size,
                       int max_ofdm_symbol_size,
                       c16_t delay_table[][max_ofdm_symbol_size]);
 
+void sl_ue_phy_init(PHY_VARS_NR_UE *UE);
 #endif

openair1/PHY/MODULATION/modulation_UE.h

@@ -49,9 +49,17 @@ int slot_fep(PHY_VARS_UE *phy_vars_ue,
 	     int reset_freq_est);
 
 int nr_slot_fep(PHY_VARS_NR_UE *ue,
+                NR_DL_FRAME_PARMS *frame_parms,
                 const UE_nr_rxtx_proc_t *proc,
                 unsigned char symbol,
-                c16_t rxdataF[][ue->frame_parms.samples_per_slot_wCP]);
+                c16_t rxdataF[][frame_parms->samples_per_slot_wCP],
+                uint32_t linktype);
+int sl_nr_slot_fep(PHY_VARS_NR_UE *ue,
+                UE_nr_rxtx_proc_t *proc,
+                unsigned char symbol,
+                unsigned char Ns,
+                uint32_t sample_offset,
+                c16_t rxdataF[][ue->SL_UE_PHY_PARAMS.sl_frame_params.samples_per_slot_wCP]);
 
 int nr_slot_fep_init_sync(PHY_VARS_NR_UE *ue,
                           const UE_nr_rxtx_proc_t *proc,

openair1/PHY/MODULATION/slot_fep_nr.c

@@ -34,12 +34,106 @@
 #define LOG_I(A,B...) printf(A)
 #endif*/
 
+int sl_nr_slot_fep(PHY_VARS_NR_UE *ue,
+                UE_nr_rxtx_proc_t *proc,
+                unsigned char symbol,
+                unsigned char Ns,
+                uint32_t sample_offset,
+                c16_t rxdataF[][ue->SL_UE_PHY_PARAMS.sl_frame_params.samples_per_slot_wCP])
+{
+  NR_DL_FRAME_PARMS *frame_params = &ue->SL_UE_PHY_PARAMS.sl_frame_params;
+  NR_UE_COMMON *common_vars      = &ue->common_vars;
+
+  AssertFatal(symbol < frame_params->symbols_per_slot, "slot_fep: symbol must be between 0 and %d\n", frame_params->symbols_per_slot-1);
+  AssertFatal(Ns < frame_params->slots_per_frame, "slot_fep: Ns must be between 0 and %d\n", frame_params->slots_per_frame-1);
+
+  unsigned int nb_prefix_samples  = frame_params->nb_prefix_samples;
+  unsigned int nb_prefix_samples0 = frame_params->nb_prefix_samples0;
+
+
+  dft_size_idx_t dftsize = get_dft(frame_params->ofdm_symbol_size);
+  // This is for misalignment issues
+  int32_t tmp_dft_in[8192] __attribute__ ((aligned (32)));
+
+  unsigned int rx_offset = frame_params->get_samples_slot_timestamp(Ns,frame_params,0);
+  unsigned int abs_symbol = Ns * frame_params->symbols_per_slot + symbol;
+
+  rx_offset += sample_offset;
+
+  for (int idx_symb = Ns*frame_params->symbols_per_slot; idx_symb <= abs_symbol; idx_symb++)
+    rx_offset += (idx_symb%(0x7<<frame_params->numerology_index)) ? nb_prefix_samples : nb_prefix_samples0;
+  rx_offset += frame_params->ofdm_symbol_size * symbol;
+
+  // use OFDM symbol from within 1/8th of the CP to avoid ISI
+  rx_offset -= (nb_prefix_samples / frame_params->ofdm_offset_divisor);
+
+#ifdef SL_DEBUG_SLOT_FEP
+  //  if (ue->frame <100)
+  LOG_I(PHY, "slot_fep: slot %d, symbol %d, nb_prefix_samples %u, nb_prefix_samples0 %u, rx_offset %u\n",
+         Ns, symbol, nb_prefix_samples, nb_prefix_samples0, rx_offset);
+#endif
+
+  for (unsigned char aa=0; aa<frame_params->nb_antennas_rx; aa++) {
+    memset(&rxdataF[aa][frame_params->ofdm_symbol_size*symbol],0,frame_params->ofdm_symbol_size*sizeof(int32_t));
+
+    int16_t *rxdata_ptr = (int16_t *)&common_vars->rxdata[aa][rx_offset];
+
+    // if input to dft is not 256-bit aligned
+    if ((rx_offset & 7) != 0) {
+      memcpy((void *)&tmp_dft_in[0],
+             (void *)&common_vars->rxdata[aa][rx_offset],
+             frame_params->ofdm_symbol_size * sizeof(int32_t));
+
+      rxdata_ptr = (int16_t *)tmp_dft_in;
+    }
+
+    dft(dftsize,
+        rxdata_ptr,
+        (int16_t *)&rxdataF[aa][frame_params->ofdm_symbol_size*symbol],
+        1);
+
+
+    int symb_offset = (Ns%frame_params->slots_per_subframe)*frame_params->symbols_per_slot;
+    int32_t rot2 = ((uint32_t*)frame_params->symbol_rotation[1])[symbol+symb_offset];
+    ((int16_t*)&rot2)[1]=-((int16_t*)&rot2)[1];
+
+#ifdef SL_DEBUG_SLOT_FEP
+    //  if (ue->frame <100)
+    LOG_I(PHY, "slot_fep: slot %d, symbol %d rx_offset %u, rotation symbol %d %d.%d\n", Ns,symbol, rx_offset,
+	   symbol+symb_offset,((int16_t*)&rot2)[0],((int16_t*)&rot2)[1]);
+#endif
+
+    rotate_cpx_vector((c16_t *)&rxdataF[aa][frame_params->ofdm_symbol_size*symbol],
+		      (c16_t *)&rot2,
+		      (c16_t *)&rxdataF[aa][frame_params->ofdm_symbol_size*symbol],
+		      frame_params->ofdm_symbol_size,
+		      15);
+
+    int16_t *shift_rot = (int16_t *)frame_params->timeshift_symbol_rotation;
+
+    multadd_cpx_vector((int16_t *)&rxdataF[aa][frame_params->ofdm_symbol_size*symbol],
+          shift_rot,
+          (int16_t *)&rxdataF[aa][frame_params->ofdm_symbol_size*symbol],
+          1,
+          frame_params->ofdm_symbol_size,
+          15);
+  }
+
+
+
+  LOG_D(PHY, "SIDELINK RX: Slot FEP: done for symbol:%d\n", symbol);
+
+  return 0;
+}
+
 int nr_slot_fep(PHY_VARS_NR_UE *ue,
+                NR_DL_FRAME_PARMS *frame_parms,
                 const UE_nr_rxtx_proc_t *proc,
                 unsigned char symbol,
-                c16_t rxdataF[][ue->frame_parms.samples_per_slot_wCP])
+                c16_t rxdataF[][frame_parms->samples_per_slot_wCP],
+                uint32_t linktype)
 {
-  NR_DL_FRAME_PARMS *frame_parms = &ue->frame_parms;
+
   NR_UE_COMMON *common_vars      = &ue->common_vars;
   int Ns = proc->nr_slot_rx;
 
@@ -98,7 +192,7 @@ int nr_slot_fep(PHY_VARS_NR_UE *ue,
 
     apply_nr_rotation_RX(frame_parms,
                          rxdataF[aa],
-                         frame_parms->symbol_rotation[0],
+                         frame_parms->symbol_rotation[linktype],
                          Ns,
                          frame_parms->N_RB_DL,
                          0,

openair1/PHY/NR_REFSIG/nr_dmrs_rx.c

@@ -202,22 +202,32 @@ int nr_pdcch_dmrs_rx(PHY_VARS_NR_UE *ue,
   return(0);
 }
 
-void nr_pbch_dmrs_rx(const int symbol, const unsigned int *nr_gold_pbch, c16_t *output)
+void nr_pbch_dmrs_rx(int symbol,
+                     unsigned int *nr_gold_pbch,
+                     c16_t *output,
+                     bool sidelink)
 {
   int m,m0,m1;
   uint8_t idx=0;
-  AssertFatal(symbol>=0 && symbol <3,"illegal symbol %d\n",symbol);
-  if (symbol == 0) {
-    m0=0;
-    m1=60;
-  }
-  else if (symbol == 1) {
-    m0=60;
-    m1=84;
-  }
-  else {
-    m0=84;
-    m1=144;
+  if (sidelink) {
+    AssertFatal(symbol== 0 || (symbol>=5 && symbol <=12),"illegal symbol %d\n",symbol);
+    m0 = (symbol) ? (symbol - 4) * 33 : 0;
+    m1 = (symbol) ? (symbol - 3) * 33 : 33;
+
+  } else {
+    AssertFatal(symbol>=0 && symbol <3,"illegal symbol %d\n",symbol);
+    if (symbol == 0) {
+      m0=0;
+      m1=60;
+    }
+    else if (symbol == 1) {
+      m0=60;
+      m1=84;
+    }
+    else {
+      m0=84;
+      m1=144;
+    }
   }
   //    printf("Generating pilots symbol %d, m0 %d, m1 %d\n",symbol,m0,m1);
   /// QPSK modulation

openair1/PHY/NR_REFSIG/nr_gold_ue.c

@@ -20,6 +20,7 @@
  */
 
 #include "refsig_defs_ue.h"
+#include "PHY/NR_REFSIG/nr_mod_table.h"
 
 void nr_gold_pbch(PHY_VARS_NR_UE* ue)
 {
@@ -148,3 +149,66 @@ void init_nr_gold_prs(PHY_VARS_NR_UE* ue)
     } // for rsc
   } // for gnb
 }
+
+void sl_init_psbch_dmrs_gold_sequences(PHY_VARS_NR_UE *UE)
+{
+  unsigned int x1, x2;
+  uint16_t slss_id;
+  uint8_t reset;
+
+  for (slss_id = 0; slss_id < SL_NR_NUM_SLSS_IDs; slss_id++) {
+
+    reset = 1;
+    x2 = slss_id;
+
+#ifdef SL_DEBUG_INIT
+     printf("\nPSBCH DMRS GOLD SEQ for SLSSID :%d  :\n", slss_id);
+#endif
+
+    for (uint8_t n=0; n<SL_NR_NUM_PSBCH_DMRS_RE_DWORD; n++) {
+      UE->SL_UE_PHY_PARAMS.init_params.psbch_dmrs_gold_sequences[slss_id][n] = lte_gold_generic(&x1, &x2, reset);
+      reset = 0;
+
+#ifdef SL_DEBUG_INIT_DATA
+      printf("%x\n",SL_UE_INIT_PARAMS.sl_psbch_dmrs_gold_sequences[slss_id][n]);
+#endif
+
+    }
+  }
+}
+
+void sl_generate_psbch_dmrs_qpsk_sequences(PHY_VARS_NR_UE *UE,
+                                           struct complex16 *modulated_dmrs_sym,
+                                           uint16_t slss_id)
+{
+
+  uint8_t idx = 0;
+  uint32_t *sl_dmrs_sequence = UE->SL_UE_PHY_PARAMS.init_params.psbch_dmrs_gold_sequences[slss_id];
+  c16_t *mod_table = (c16_t *)nr_qpsk_mod_table;
+
+#ifdef SL_DEBUG_INIT
+  printf("SIDELINK INIT: PSBCH DMRS Generation with slss_id:%d\n", slss_id);
+#endif
+
+  /// QPSK modulation
+  for (int m=0; m<SL_NR_NUM_PSBCH_DMRS_RE; m++) {
+
+    idx = (((sl_dmrs_sequence[(m<<1)>>5])>>((m<<1)&0x1f))&3);
+    modulated_dmrs_sym[m].r = mod_table[idx].r;
+    modulated_dmrs_sym[m].i = mod_table[idx].i;
+
+#ifdef SL_DEBUG_INIT_DATA
+    printf("m:%d gold seq: %d b0-b1: %d-%d DMRS Symbols: %d %d\n", m, sl_dmrs_sequence[(m<<1)>>5], (((sl_dmrs_sequence[(m<<1)>>5])>>((m<<1)&0x1f))&1),
+           (((sl_dmrs_sequence[((m<<1)+1)>>5])>>(((m<<1)+1)&0x1f))&1), modulated_dmrs_sym[m].r, modulated_dmrs_sym[m].i);
+    printf("idx:%d, qpsk_table.r:%d, qpsk_table.i:%d\n", idx, mod_table[idx].r, mod_table[idx].i);
+#endif
+  }
+
+#ifdef SL_DUMP_INIT_SAMPLES
+  char filename[40], varname[25];
+  sprintf(filename,"sl_psbch_dmrs_slssid_%d.m", slss_id);
+  sprintf(varname,"sl_dmrs_id_%d.m", slss_id);
+  LOG_M(filename, varname, (void*)modulated_dmrs_sym, SL_NR_NUM_PSBCH_DMRS_RE, 1, 1);
+#endif
+
+}

openair1/PHY/NR_REFSIG/refsig_defs_ue.h

@@ -30,7 +30,10 @@
 /*!\brief This function generates the NR Gold sequence (38-211, Sec 5.2.1) for the PBCH DMRS.
 @param PHY_VARS_NR_UE* ue structure provides configuration, frame parameters and the pointers to the 32 bits sequence storage tables
  */
-void nr_pbch_dmrs_rx(const int dmrss, const unsigned int *nr_gold_pbch, c16_t *output);
+void nr_pbch_dmrs_rx(int dmrss,
+                     unsigned int *nr_gold_pbch,
+                     c16_t *output,
+                     bool sidelink);
 
 /*!\brief This function generates the NR Gold sequence (38-211, Sec 5.2.1) for the PDCCH DMRS.
 @param PHY_VARS_NR_UE* ue structure provides configuration, frame parameters and the pointers to the 32 bits sequence storage tables
@@ -66,5 +69,11 @@ void nr_init_pusch_dmrs(PHY_VARS_NR_UE* ue,
 
 void nr_init_csi_rs(const NR_DL_FRAME_PARMS *fp, uint32_t ***csi_rs, uint32_t Nid);
 void init_nr_gold_prs(PHY_VARS_NR_UE* ue);
-
+void sl_generate_pss(SL_NR_UE_INIT_PARAMS_t *sl_init_params, uint8_t n_sl_id2, uint16_t scaling);
+void sl_generate_pss_ifft_samples(sl_nr_ue_phy_params_t *sl_ue_params, SL_NR_UE_INIT_PARAMS_t *sl_init_params);
+void sl_generate_sss(SL_NR_UE_INIT_PARAMS_t *sl_init_params, uint16_t slss_id, uint16_t scaling);
+void sl_init_psbch_dmrs_gold_sequences(PHY_VARS_NR_UE *UE);
+void sl_generate_psbch_dmrs_qpsk_sequences(PHY_VARS_NR_UE *UE,
+                                           struct complex16 *modulated_dmrs_sym,
+                                           uint16_t slss_id);
 #endif

openair1/PHY/NR_REFSIG/sss_nr.h

@@ -67,8 +67,17 @@
 
 #define PHASE_HYPOTHESIS_NUMBER       (16)
 #define INDEX_NO_PHASE_DIFFERENCE (3) /* this is for no phase shift case */
+
 /************** FUNCTION ******************************************/
 
+static const c16_t phase_nr[PHASE_HYPOTHESIS_NUMBER] = {
+    // {pi/3 ---- pi/3, -pi/3 ---- pi/3}
+    {16384, -28377}, {20173, -25821}, {23571, -22762}, {26509, -19260},
+    {28932, -15383}, {30791, -11207}, {32051, -6813}, {32687, -2286},
+    {32687, 2286}, {32051, 6813}, {30791, 11207}, {28932, 15383},
+    {26509, 19260}, {23571, 22762}, {20173, 25821}, {16384, 28377}
+};
+
 void init_context_sss_nr(int amp);
 void free_context_sss_nr(void);
 

openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c

@@ -657,7 +657,7 @@ c32_t nr_pbch_dmrs_correlation(const PHY_VARS_NR_UE *ue,
   // generate pilot
   // Note: pilot returned by the following function is already the complex conjugate of the transmitted DMRS
   c16_t pilot[200] __attribute__((aligned(16)));
-  nr_pbch_dmrs_rx(dmrss, nr_gold_pbch, pilot);
+  nr_pbch_dmrs_rx(dmrss, (uint32_t *)nr_gold_pbch, pilot, false);
   c32_t computed_val = {0};
   for (int aarx=0; aarx<ue->frame_parms.nb_antennas_rx; aarx++) {
 
@@ -717,42 +717,70 @@ c32_t nr_pbch_dmrs_correlation(const PHY_VARS_NR_UE *ue,
 }
 
 int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
+                                NR_DL_FRAME_PARMS *fp,
                                int estimateSz,
                                struct complex16 dl_ch_estimates[][estimateSz],
-                               struct complex16 dl_ch_estimates_time[][ue->frame_parms.ofdm_symbol_size],
+                               struct complex16 dl_ch_estimates_time[][fp->ofdm_symbol_size],
                                const UE_nr_rxtx_proc_t *proc,
                                unsigned char symbol,
                                int dmrss,
                                uint8_t ssb_index,
                                uint8_t n_hf,
-                               c16_t rxdataF[][ue->frame_parms.samples_per_slot_wCP])
+                               c16_t rxdataF[][fp->samples_per_slot_wCP],
+                               bool sidelink,
+                               uint16_t Nid)
 {
   int Ns = proc->nr_slot_rx;
   c16_t pilot[200] __attribute__((aligned(16)));
   //int slot_pbch;
 
-  const int nushift = ue->frame_parms.Nid_cell % 4;
-  unsigned int  ssb_offset = ue->frame_parms.first_carrier_offset + ue->frame_parms.ssb_start_subcarrier;
-  if (ssb_offset>= ue->frame_parms.ofdm_symbol_size) ssb_offset-=ue->frame_parms.ofdm_symbol_size;
+  uint8_t nushift = 0, lastsymbol = 0, num_rbs = 0;
+  uint32_t *gold_seq = NULL;
 
-  const int ch_offset = ue->frame_parms.ofdm_symbol_size * symbol;
+  if (sidelink) {
+
+    AssertFatal(dmrss == 0 || (dmrss >= 5 && dmrss <= 12),
+	      "symbol %d is illegal for PSBCH DM-RS \n",
+	      dmrss);
 
-  AssertFatal(dmrss >= 0 && dmrss < 3,
+    sl_nr_ue_phy_params_t *sl_phy_params = &ue->SL_UE_PHY_PARAMS;
+
+    LOG_D(PHY,"PSBCH Channel Estimation SLSSID:%d\n", Nid);
+
+    gold_seq = sl_phy_params->init_params.psbch_dmrs_gold_sequences[Nid];
+    lastsymbol = 12;
+    num_rbs = SL_NR_NUM_PSBCH_RBS_IN_ONE_SYMBOL;
+
+  } else {
+
+    nushift =  fp->Nid_cell%4;
+
+    AssertFatal(dmrss >= 0 && dmrss < 3,
 	      "symbol %d is illegal for PBCH DM-RS \n",
 	      dmrss);
 
-  const int symbol_offset = ue->frame_parms.ofdm_symbol_size * symbol;
+    gold_seq = ue->nr_gold_pbch[n_hf][ssb_index];
+    lastsymbol = 2;
+    num_rbs = 20;
+  }
 
+  unsigned int  ssb_offset = fp->first_carrier_offset + fp->ssb_start_subcarrier;
+  if (ssb_offset>= fp->ofdm_symbol_size) ssb_offset-= fp->ofdm_symbol_size;
+
+  const int ch_offset = fp->ofdm_symbol_size*symbol;
+  const int symbol_offset = fp->ofdm_symbol_size*symbol;
   const int k = nushift;
-  const c16_t *fl, *fm, *fr;
+
   DEBUG_PBCH("PBCH Channel Estimation : gNB_id %d ch_offset %d, OFDM size %d, Ncp=%d, Ns=%d, k=%d symbol %d\n",
-             proc->gNB_id,
-             ch_offset,
-             ue->frame_parms.ofdm_symbol_size,
-             ue->frame_parms.Ncp,
-             Ns,
-             k,
-             symbol);
+              proc->gNB_id,
+              ch_offset,
+              fp->ofdm_symbol_size,
+              fp->Ncp,
+              Ns,
+              k,
+              symbol);
+
+  const c16_t *fl, *fm, *fr;
 
   switch (k) {
   case 0:
@@ -787,7 +815,7 @@ int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
 
   idft_size_idx_t idftsizeidx;
   
-  switch (ue->frame_parms.ofdm_symbol_size) {
+  switch (fp->ofdm_symbol_size) {
   case 128:
     idftsizeidx = IDFT_128;
     break;
@@ -835,19 +863,19 @@ int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
   
   // generate pilot
   // Note: pilot returned by the following function is already the complex conjugate of the transmitted DMRS
-  nr_pbch_dmrs_rx(dmrss, ue->nr_gold_pbch[n_hf][ssb_index], pilot);
+  nr_pbch_dmrs_rx(dmrss,gold_seq, &pilot[0], sidelink);
 
-  for (int aarx=0; aarx<ue->frame_parms.nb_antennas_rx; aarx++) {
+  for (int aarx=0; aarx<fp->nb_antennas_rx; aarx++) {
 
     int re_offset = ssb_offset;
     c16_t *pil = pilot;
     c16_t *rxF = &rxdataF[aarx][symbol_offset + k];
     c16_t *dl_ch = &dl_ch_estimates[aarx][ch_offset];
 
-    memset(dl_ch, 0, sizeof(c16_t) * ue->frame_parms.ofdm_symbol_size);
+    memset(dl_ch, 0, sizeof(c16_t) * fp->ofdm_symbol_size);
 
-    DEBUG_PBCH("pbch ch est pilot RB_DL %d\n", ue->frame_parms.N_RB_DL);
-    DEBUG_PBCH("k %d, first_carrier %d\n", k, ue->frame_parms.first_carrier_offset);
+    DEBUG_PBCH("pbch ch est pilot RB_DL %d\n", fp->N_RB_DL);
+    DEBUG_PBCH("k %d, first_carrier %d\n", k, fp->first_carrier_offset);
 
     // Treat first 2 pilots specially (left edge)
     c16_t ch;
@@ -855,31 +883,31 @@ int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
     DEBUG_PBCH("pilot 0: rxF= (%d,%d), ch= (%d,%d), pil=(%d,%d)\n", rxF[re_offset].r, rxF[re_offset].i, ch.r, ch.i, pil->r, pil->i);
     multaddRealVectorComplexScalar(fl, ch, dl_ch, 16);
     pil++;
-    re_offset = (re_offset + 4) % ue->frame_parms.ofdm_symbol_size;
+    re_offset = (re_offset + 4) % fp->ofdm_symbol_size;
 
     ch = c16mulShift(*pil, rxF[re_offset], 15);
 
     DEBUG_PBCH("pilot 1: rxF= (%d,%d), ch= (%d,%d), pil=(%d,%d)\n", rxF[re_offset].r, rxF[re_offset].i, ch.r, ch.i, pil->r, pil->i);
     multaddRealVectorComplexScalar(fm, ch, dl_ch, 16);
     pil++;
-    re_offset = (re_offset + 4) % ue->frame_parms.ofdm_symbol_size;
+    re_offset = (re_offset + 4) % fp->ofdm_symbol_size;
 
     ch = c16mulShift(*pil, rxF[re_offset], 15);
 
     DEBUG_PBCH("pilot 2: rxF= (%d,%d), ch= (%d,%d), pil=(%d,%d)\n", rxF[re_offset].r, rxF[re_offset].i, ch.r, ch.i, pil->r, pil->i);
     multaddRealVectorComplexScalar(fr, ch, dl_ch, 16);
     pil++;
-    re_offset = (re_offset + 4) % ue->frame_parms.ofdm_symbol_size;
+    re_offset = (re_offset + 4) % fp->ofdm_symbol_size;
     dl_ch += 24;
 
-    for (int pilot_cnt = 3; pilot_cnt < (3 * 20); pilot_cnt += 3) {
+    for (int pilot_cnt = 3; pilot_cnt < (3 * num_rbs); pilot_cnt += 3) {
       //	if (pilot_cnt == 30)
       //	  rxF   = (int16_t *)&rxdataF[aarx][(symbol_offset+k)];
 
       // in 2nd symbol, skip middle  REs (48 with DMRS,  144 for SSS, and another 48 with DMRS) 
       if (dmrss == 1 && pilot_cnt == 12) {
         pilot_cnt=48;
-        re_offset = (re_offset + 144) % ue->frame_parms.ofdm_symbol_size;
+        re_offset = (re_offset + 144) % fp->ofdm_symbol_size;
         dl_ch += 288;
       }
       ch = c16mulShift(*pil, rxF[re_offset], 15);
@@ -894,7 +922,7 @@ int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
       multaddRealVectorComplexScalar(fl, ch, dl_ch, 16);
 
       pil++;
-      re_offset = (re_offset+4) % ue->frame_parms.ofdm_symbol_size;
+      re_offset = (re_offset+4) % fp->ofdm_symbol_size;
       ch = c16mulShift(*pil, rxF[re_offset], 15);
       DEBUG_PBCH("pilot %u: rxF= (%d,%d), ch= (%d,%d), pil=(%d,%d)\n",
                  pilot_cnt + 1,
@@ -906,7 +934,7 @@ int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
                  pil->i);
       multaddRealVectorComplexScalar(fm, ch, dl_ch, 16);
       pil++;
-      re_offset = (re_offset+4) % ue->frame_parms.ofdm_symbol_size;
+      re_offset = (re_offset+4) % fp->ofdm_symbol_size;
       ch = c16mulShift(*pil, rxF[re_offset], 15);
       DEBUG_PBCH("pilot %u: rxF= (%d,%d), ch= (%d,%d), pil=(%d,%d)\n",
                  pilot_cnt + 2,
@@ -918,11 +946,11 @@ int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
                  pil->i);
       multaddRealVectorComplexScalar(fr, ch, dl_ch, 16);
       pil++;
-      re_offset = (re_offset + 4) % ue->frame_parms.ofdm_symbol_size;
+      re_offset = (re_offset + 4) % fp->ofdm_symbol_size;
       dl_ch += 12;
     }
 
-    if( dmrss == 2) // update time statistics for last PBCH symbol
+    if( dmrss == lastsymbol) // update time statistics for last PBCH symbol
     {
       // do ifft of channel estimate
       LOG_D(PHY,"Channel Impulse Computation Slot %d Symbol %d ch_offset %d\n", Ns, symbol, ch_offset);
@@ -933,13 +961,13 @@ int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
     }
   }
 
-  if (dmrss == 2)
+  if (!sidelink && dmrss == lastsymbol)
     UEscopeCopy(ue,
                 pbchDlChEstimateTime,
                 (void *)dl_ch_estimates_time,
                 sizeof(c16_t),
-                ue->frame_parms.nb_antennas_rx,
-                ue->frame_parms.ofdm_symbol_size,
+                fp->nb_antennas_rx,
+                fp->ofdm_symbol_size,
                 0);
 
   return(0);

openair1/PHY/NR_UE_ESTIMATION/nr_estimation.h

@@ -65,15 +65,18 @@ c32_t nr_pbch_dmrs_correlation(const PHY_VARS_NR_UE *ue,
                                const c16_t rxdataF[][ue->frame_parms.samples_per_slot_wCP]);
 
 int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
+                                NR_DL_FRAME_PARMS *fp,
                                int estimateSz,
                                struct complex16 dl_ch_estimates[][estimateSz],
-                               struct complex16 dl_ch_estimates_time[][ue->frame_parms.ofdm_symbol_size],
+                               struct complex16 dl_ch_estimates_time[][fp->ofdm_symbol_size],
                                const UE_nr_rxtx_proc_t *proc,
                                unsigned char symbol,
                                int dmrss,
                                uint8_t ssb_index,
                                uint8_t n_hf,
-                               c16_t rxdataF[][ue->frame_parms.samples_per_slot_wCP]);
+                               c16_t rxdataF[][fp->samples_per_slot_wCP],
+                               bool sidelink,
+                               uint16_t Nid);
 
 int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
                                 const UE_nr_rxtx_proc_t *proc,
@@ -137,5 +140,10 @@ void nr_pdsch_ptrs_processing(PHY_VARS_NR_UE *ue,
                               NR_UE_DLSCH_t dlsch[2]);
 
 float_t get_nr_RSRP(module_id_t Mod_id,uint8_t CC_id,uint8_t gNB_index);
+
+void nr_sl_psbch_rsrp_measurements(sl_nr_ue_phy_params_t *sl_phy_params,
+                                   NR_DL_FRAME_PARMS *fp,
+                                   c16_t rxdataF[][fp->samples_per_slot_wCP],
+                                   bool use_SSS);
 /** @}*/
 #endif

openair1/PHY/NR_UE_ESTIMATION/nr_ue_measurements.c

@@ -309,3 +309,57 @@ void nr_ue_rrc_measurements(PHY_VARS_NR_UE *ue,
         ue->measurements.n0_power_tot_dB + 30 - 10 * log10(pow(2, 30)) - dB_fixed(ue->frame_parms.ofdm_symbol_size)
             - ((int)rx_gain - (int)rx_gain_offset));
 }
+
+//PSBCH RSRP calculations according to 38.215 section 5.1.22
+void nr_sl_psbch_rsrp_measurements(sl_nr_ue_phy_params_t *sl_phy_params,
+                                   NR_DL_FRAME_PARMS *fp,
+                                   c16_t rxdataF[][fp->samples_per_slot_wCP],
+                                   bool use_SSS)
+{
+
+  SL_NR_UE_PSBCH_t *psbch_rx = &sl_phy_params->psbch;
+  uint8_t numsym = (fp->Ncp) ? SL_NR_NUM_SYMBOLS_SSB_EXT_CP
+                             : SL_NR_NUM_SYMBOLS_SSB_NORMAL_CP;
+  uint32_t re_offset = fp->first_carrier_offset + fp->ssb_start_subcarrier;
+  uint32_t rsrp = 0, num_re = 0;
+
+  LOG_D(PHY, "PSBCH RSRP MEAS: numsym:%d, re_offset:%d\n",numsym, re_offset);
+
+  for (int aarx = 0; aarx < fp->nb_antennas_rx; aarx++) {
+
+    //Calculate PSBCH RSRP based from DMRS REs
+    for (uint8_t symbol=0; symbol<numsym;) {
+
+      struct complex16 *rxF = &rxdataF[aarx][symbol*fp->ofdm_symbol_size];
+
+      for (int re=0;re<SL_NR_NUM_PSBCH_RE_IN_ONE_SYMBOL;re++) {
+
+        if (re%4 == 0) { //DMRS RE
+          uint16_t offset = (re_offset + re) % fp->ofdm_symbol_size;
+
+          rsrp += c16amp2(rxF[offset]);
+          num_re++;
+        }
+      }
+      symbol = (symbol == 0) ? 5 : symbol+1;
+    }
+  }
+
+  if (use_SSS) {
+    //TBD...
+    //UE can decide between using only PSBCH DMRS or PSBCH DMRS and SSS for PSBCH RSRP computation.
+    //If needed this can be implemented. Reference Spec 38.215
+  }
+
+  psbch_rx->rsrp_dB_per_RE = 10*log10(rsrp / num_re);
+  psbch_rx->rsrp_dBm_per_RE = psbch_rx->rsrp_dB_per_RE +
+                              30 - 10*log10(pow(2,30)) -
+                              ((int)openair0_cfg[0].rx_gain[0] - (int)openair0_cfg[0].rx_gain_offset[0]) -
+                              dB_fixed(fp->ofdm_symbol_size);
+
+
+  LOG_I(PHY, "PSBCH RSRP (DMRS REs): numREs:%d RSRP :%d dB/RE ,RSRP:%d dBm/RE\n",
+                              num_re, psbch_rx->rsrp_dB_per_RE, psbch_rx->rsrp_dBm_per_RE);
+
+}
+

openair1/PHY/NR_UE_TRANSPORT/nr_initial_sync.c

@@ -101,6 +101,7 @@ static bool nr_pbch_detection(const UE_nr_rxtx_proc_t *proc,
 
     for(int i=pbch_initial_symbol; i<pbch_initial_symbol+3;i++)
       nr_pbch_channel_estimation(ue,
+                                 &ue->frame_parms,
                                  estimateSz,
                                  dl_ch_estimates,
                                  dl_ch_estimates_time,
@@ -109,7 +110,9 @@ static bool nr_pbch_detection(const UE_nr_rxtx_proc_t *proc,
                                  i - pbch_initial_symbol,
                                  ssb->i_ssb,
                                  ssb->n_hf,
-                                 rxdataF);
+                                 rxdataF,
+                                 false,
+                                 frame_parms->Nid_cell);
 
     stop_meas(&ue->dlsch_channel_estimation_stats);
     fapiPbch_t result = {0};

openair1/PHY/NR_UE_TRANSPORT/nr_pbch.c

@@ -45,7 +45,6 @@
 //#include "PHY_INTERFACE/defs.h"
 
 #define PBCH_A 24
-#define PBCH_MAX_RE_PER_SYMBOL (20*12)
 #define PBCH_MAX_RE (PBCH_MAX_RE_PER_SYMBOL*4)
 #define print_shorts(s,x) printf("%s : %d,%d,%d,%d,%d,%d,%d,%d\n",s,((int16_t*)x)[0],((int16_t*)x)[1],((int16_t*)x)[2],((int16_t*)x)[3],((int16_t*)x)[4],((int16_t*)x)[5],((int16_t*)x)[6],((int16_t*)x)[7])
 
@@ -230,20 +229,19 @@ int nr_pbch_channel_level(struct complex16 dl_ch_estimates_ext[][PBCH_MAX_RE_PER
   return(avg2);
 }
 
-static void nr_pbch_channel_compensation(struct complex16 rxdataF_ext[][PBCH_MAX_RE_PER_SYMBOL],
-					 struct complex16 dl_ch_estimates_ext[][PBCH_MAX_RE_PER_SYMBOL],
-					 int nb_re,
-					 struct complex16 rxdataF_comp[][PBCH_MAX_RE_PER_SYMBOL],
-					 NR_DL_FRAME_PARMS *frame_parms,
-					 uint8_t output_shift) {
+void nr_pbch_channel_compensation(struct complex16 rxdataF_ext[][PBCH_MAX_RE_PER_SYMBOL],
+                                  struct complex16 dl_ch_estimates_ext[][PBCH_MAX_RE_PER_SYMBOL],
+                                  int nb_re,
+                                  struct complex16 rxdataF_comp[][PBCH_MAX_RE_PER_SYMBOL],
+                                  NR_DL_FRAME_PARMS *frame_parms,
+                                  uint8_t output_shift)
+{
   for (int aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
     simde__m128i *dl_ch128          = (simde__m128i *)dl_ch_estimates_ext[aarx];
     simde__m128i *rxdataF128        = (simde__m128i *)rxdataF_ext[aarx];
     simde__m128i *rxdataF_comp128   = (simde__m128i *)rxdataF_comp[aarx];
 
-    for (int re=0; re<nb_re; re+=12) {
-      *rxdataF_comp128++ = mulByConjugate128(rxdataF128++, dl_ch128++, output_shift);
-      *rxdataF_comp128++ = mulByConjugate128(rxdataF128++, dl_ch128++, output_shift);
+    for (int re=0; re<nb_re; re+=4) {
       *rxdataF_comp128++ = mulByConjugate128(rxdataF128++, dl_ch128++, output_shift);
     }
   }
@@ -272,7 +270,7 @@ void nr_pbch_detection_mrc(NR_DL_FRAME_PARMS *frame_parms,
   simde_m_empty();
 }
 
-static void nr_pbch_unscrambling(int16_t *demod_pbch_e,
+void nr_pbch_unscrambling(int16_t *demod_pbch_e,
                                  uint16_t Nid,
                                  uint8_t nushift,
                                  uint16_t M,
@@ -334,7 +332,7 @@ static void nr_pbch_unscrambling(int16_t *demod_pbch_e,
   }
 }
 
-static void nr_pbch_quantize(int16_t *pbch_llr8,
+void nr_pbch_quantize(int16_t *pbch_llr8,
                              int16_t *pbch_llr,
                              uint16_t len) {
   for (int i=0; i<len; i++) {

openair1/PHY/NR_UE_TRANSPORT/nr_psbch_rx.c

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.0  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include "PHY/defs_nr_UE.h"
+#include "PHY/CODING/nrPolar_tools/nr_polar_psbch_defs.h"
+#include "PHY/CODING/nrPolar_tools/nr_polar_defs.h"
+#include "common/utils/LOG/log.h"
+#include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h"
+
+
+//#define DEBUG_PSBCH
+
+static void nr_psbch_extract(uint32_t rxdataF_sz,
+                                c16_t rxdataF[][rxdataF_sz],
+                                int estimateSz,
+                                struct complex16 dl_ch_estimates[][estimateSz],
+                                struct complex16 rxdataF_ext[][SL_NR_NUM_PSBCH_DATA_RE_IN_ONE_SYMBOL],
+                                struct complex16 dl_ch_estimates_ext[][SL_NR_NUM_PSBCH_DATA_RE_IN_ONE_SYMBOL],
+                                uint32_t symbol,
+                                NR_DL_FRAME_PARMS *frame_params)
+{
+  uint16_t rb;
+  uint8_t i,j,aarx;
+  struct complex16 *dl_ch0,*dl_ch0_ext,*rxF,*rxF_ext;
+  const uint8_t nb_rb = SL_NR_NUM_PSBCH_RBS_IN_ONE_SYMBOL; 
+
+  AssertFatal((symbol == 0 || symbol >= 5), "SIDELINK: PSBCH DMRS not contained in symbol %d \n", symbol);
+
+  for (aarx=0; aarx<frame_params->nb_antennas_rx; aarx++) {
+    unsigned int rx_offset = frame_params->first_carrier_offset + frame_params->ssb_start_subcarrier;
+    rx_offset = rx_offset % frame_params->ofdm_symbol_size;
+
+    rxF        = &rxdataF[aarx][symbol*frame_params->ofdm_symbol_size];
+    rxF_ext    = &rxdataF_ext[aarx][0];
+
+    dl_ch0 = &dl_ch_estimates[aarx][symbol*frame_params->ofdm_symbol_size];
+    dl_ch0_ext = &dl_ch_estimates_ext[aarx][0];
+
+#ifdef DEBUG_PSBCH
+    LOG_I(PHY, "extract_rbs: rx_offset=%d, symbol %u\n", (rx_offset + (symbol*frame_params->ofdm_symbol_size)),symbol);
+#endif
+
+    for (rb=0; rb<nb_rb; rb++) {
+      j=0;
+
+      for (i=0; i<NR_NB_SC_PER_RB; i++) {
+        if (i%4 != 0) {
+          rxF_ext[j]=rxF[rx_offset];
+          dl_ch0_ext[j]=dl_ch0[i];
+
+#ifdef  DEBUG_PSBCH
+
+          LOG_I(PHY,"rxF ext[%d] = (%d,%d) rxF [%u]= (%d,%d)\n",
+                                              (9*rb) + j,rxF_ext[j].r,rxF_ext[j].i,
+                                              rx_offset,rxF[rx_offset].r,rxF[rx_offset].i);
+          LOG_I(PHY,"dl ch0 ext[%d] = (%d,%d)  dl_ch0 [%d]= (%d,%d)\n",
+                                               (9*rb) + j,dl_ch0_ext[j].r,dl_ch0_ext[j].i,
+                                                i, dl_ch0[i].r,dl_ch0[i].i);
+#endif
+          j++;
+        }
+        rx_offset=(rx_offset+1)%(frame_params->ofdm_symbol_size);
+      }
+
+      rxF_ext += SL_NR_NUM_PSBCH_DATA_RE_IN_ONE_RB;
+      dl_ch0_ext += SL_NR_NUM_PSBCH_DATA_RE_IN_ONE_RB;
+      dl_ch0 += NR_NB_SC_PER_RB;
+    }
+
+#ifdef DEBUG_PSBCH
+  char filename[40], varname[25];
+  sprintf(filename,"psbch_dlch_sym_%d.m", symbol);
+  sprintf(varname,"psbch_dlch%d.m", symbol);
+  LOG_M(filename, varname, (void*)dl_ch0, frame_params->ofdm_symbol_size, 1, 1);
+  sprintf(filename,"psbch_dlchext_sym_%d.m", symbol);
+  sprintf(varname,"psbch_dlchext%d.m", symbol);
+  LOG_M(filename, varname, (void*)&dl_ch_estimates_ext[0][0], SL_NR_NUM_PSBCH_DATA_RE_IN_ONE_SYMBOL , 1, 1);
+#endif
+
+  }
+
+  return;
+
+}
+
+int nr_rx_psbch(PHY_VARS_NR_UE *ue,
+                UE_nr_rxtx_proc_t *proc,
+                int estimateSz,
+                struct complex16 dl_ch_estimates[][estimateSz],
+                NR_DL_FRAME_PARMS *frame_parms,
+                uint8_t *decoded_output,
+                c16_t rxdataF[][frame_parms->samples_per_slot_wCP],
+                uint16_t slss_id)
+{
+
+  uint32_t decoderState=0;
+  int psbch_e_rx_idx = 0;
+  //Extra 2 bits needed as polar decoder expects a multiple of 4 as encoder length
+  //If these 2 bits are not added, runs compiled with --sanitize will fail.
+  int16_t psbch_e_rx[SL_NR_POLAR_PSBCH_E_NORMAL_CP+2]= {0};
+
+#ifdef DEBUG_PSBCH
+  write_output("psbch_rxdataF.m","psbchrxF",
+               &rxdataF[0][0],frame_parms->ofdm_symbol_size*SL_NR_NUM_SYMBOLS_SSB_NORMAL_CP,1,1);
+#endif
+  // symbol refers to symbol within SSB. symbol_offset is the offset of the SSB wrt start of slot
+  double log2_maxh = 0;
+
+  // 0 for Normal Cyclic Prefix and 1 for EXT CyclicPrefix
+  const int numsym = (frame_parms->Ncp) ? SL_NR_NUM_SYMBOLS_SSB_EXT_CP
+                                                             : SL_NR_NUM_SYMBOLS_SSB_NORMAL_CP;
+
+  for (int symbol=0; symbol<numsym;) {
+    const uint16_t nb_re = SL_NR_NUM_PSBCH_DATA_RE_IN_ONE_SYMBOL;
+    __attribute__ ((aligned(32))) struct complex16 rxdataF_ext[frame_parms->nb_antennas_rx][nb_re+1];
+    __attribute__ ((aligned(32))) struct complex16 dl_ch_estimates_ext[frame_parms->nb_antennas_rx][nb_re+1];
+    //memset(dl_ch_estimates_ext,0, sizeof  dl_ch_estimates_ext);
+    nr_psbch_extract(frame_parms->samples_per_slot_wCP,
+                     rxdataF,
+                     estimateSz,
+                     dl_ch_estimates,
+                     rxdataF_ext,
+                     dl_ch_estimates_ext,
+                     symbol,
+                     frame_parms);
+#ifdef DEBUG_PSBCH
+    LOG_I(PHY,"PSBCH RX Symbol %d ofdm size %d\n",symbol, frame_parms->ofdm_symbol_size );
+#endif
+
+    int max_h=0;
+    if (symbol == 0) {
+      max_h = nr_pbch_channel_level(dl_ch_estimates_ext,
+                                    frame_parms,
+                                    nb_re);
+      //log2_maxh = 3+(log2_approx(max_h)/2);
+      log2_maxh = 5 +(log2_approx(max_h)/2);// LLR32 crc error. LLR 16 CRC works
+
+    }
+#ifdef DEBUG_PSBCH
+    LOG_I(PHY,"PSBCH RX log2_maxh = %f (%d)\n", log2_maxh, max_h);
+#endif
+
+    __attribute__ ((aligned(32))) struct complex16 rxdataF_comp[frame_parms->nb_antennas_rx][nb_re+1];
+    nr_pbch_channel_compensation(rxdataF_ext,
+                                 dl_ch_estimates_ext,
+                                 nb_re,
+                                 rxdataF_comp,
+                                 frame_parms,
+                                 log2_maxh); // log2_maxh+I0_shift
+
+    nr_pbch_quantize(psbch_e_rx + psbch_e_rx_idx,
+		                 (short *)rxdataF_comp[0],
+		                 SL_NR_NUM_PSBCH_DATA_BITS_IN_ONE_SYMBOL);
+
+    psbch_e_rx_idx += SL_NR_NUM_PSBCH_DATA_BITS_IN_ONE_SYMBOL;
+
+    //SKIP 2 SL-PSS AND 2 SL-SSS symbols
+    //Symbols carrying PSBCH 0, 5-12
+    symbol = (symbol == 0) ? 5 : symbol + 1;
+  }
+
+
+
+#if 0 //ENABLE SCOPE LATER
+  UEscopeCopy(ue, psbchRxdataF_comp, psbch_unClipped, sizeof(struct complex16), frame_parms->nb_antennas_rx, psbch_e_rx_idx/2);
+  UEscopeCopy(ue, psbchLlr, psbch_e_rx, sizeof(int16_t), frame_parms->nb_antennas_rx, psbch_e_rx_idx);
+#endif
+
+#ifdef DEBUG_PSBCH
+  write_output("psbch_rxdataFcomp.m","psbch_rxFcomp",psbch_unClipped,SL_NR_NUM_PSBCH_DATA_RE_IN_ALL_SYMBOLS,1,1);
+#endif
+
+  //un-scrambling
+  LOG_D(PHY, "PSBCH RX POLAR DECODING: total PSBCH bits:%d, rx_slss_id:%d\n", psbch_e_rx_idx, slss_id);
+
+  nr_pbch_unscrambling(psbch_e_rx, slss_id, 0, 0, psbch_e_rx_idx,
+		                   0, 0,  0, NULL);
+  //polar decoding de-rate matching
+  uint64_t tmp=0;
+  decoderState = polar_decoder_int16(psbch_e_rx,(uint64_t *)&tmp,0,
+                                     SL_NR_POLAR_PSBCH_MESSAGE_TYPE, SL_NR_POLAR_PSBCH_PAYLOAD_BITS, SL_NR_POLAR_PSBCH_AGGREGATION_LEVEL);
+
+
+  uint32_t psbch_payload = tmp;
+
+  if(decoderState) {
+    LOG_D(PHY,"%d:%d PSBCH RX: NOK \n",proc->frame_rx, proc->nr_slot_rx);
+    return(decoderState);
+  }
+
+  // Decoder reversal
+  uint32_t a_reversed=0;
+
+  for (int i=0; i<SL_NR_POLAR_PSBCH_PAYLOAD_BITS; i++)
+    a_reversed |= (((uint64_t)psbch_payload>>i)&1)<<(31-i);
+
+  psbch_payload = a_reversed;
+
+  *((uint32_t *)decoded_output) = psbch_payload;
+
+#ifdef DEBUG_PSBCH
+  for (int i=0; i<4; i++) {
+    LOG_I(PHY, "decoded_output[%d]:%x\n", i, decoded_output[i]);
+  }
+#endif
+
+  ue->symbol_offset = 0;
+
+  //retrieve DFN and slot number from SL-MIB
+  uint32_t DFN = 0, slot_offset = 0;
+  DFN = (((psbch_payload & 0x0700) >> 1) | ((psbch_payload & 0xFE0000) >> 17));
+  slot_offset = (((psbch_payload  & 0x010000) >> 10) | ((psbch_payload & 0xFC000000) >> 26));
+
+  LOG_D(PHY, "PSBCH RX SL-MIB:%x, decoded DFN:slot %d:%d, %x\n",psbch_payload, DFN, slot_offset, *(uint32_t *)decoded_output);
+
+  return 0;
+}

openair1/PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h

@@ -418,6 +418,42 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, int frame, uint8_t
 
 void dump_nrdlsch(PHY_VARS_NR_UE *ue,uint8_t gNB_id,uint8_t nr_slot_rx,unsigned int *coded_bits_per_codeword,int round,  unsigned char harq_pid);
 void nr_a_sum_b(c16_t *input_x, c16_t *input_y, unsigned short nb_rb);
+
+int nr_rx_psbch(PHY_VARS_NR_UE *ue,
+                UE_nr_rxtx_proc_t *proc,
+                int estimateSz,
+                struct complex16 dl_ch_estimates[][estimateSz],
+                NR_DL_FRAME_PARMS *frame_parms,
+                uint8_t *decoded_output,
+                c16_t rxdataF[][frame_parms->samples_per_slot_wCP],
+                uint16_t slss_id);
+
+void nr_tx_psbch(PHY_VARS_NR_UE *UE, uint32_t frame_tx, uint32_t slot_tx,
+                 sl_nr_tx_config_psbch_pdu_t *psbch_vars,
+                 c16_t **txdataF);
+
+nr_initial_sync_t sl_nr_slss_search(PHY_VARS_NR_UE *UE, UE_nr_rxtx_proc_t *proc, int num_frames);
+
+//Reuse already existing PBCH functions
+int nr_pbch_channel_level(struct complex16 dl_ch_estimates_ext[][PBCH_MAX_RE_PER_SYMBOL],
+                          NR_DL_FRAME_PARMS *frame_parms,
+			                    int nb_re);
+void nr_pbch_channel_compensation(struct complex16 rxdataF_ext[][PBCH_MAX_RE_PER_SYMBOL],
+					                        struct complex16 dl_ch_estimates_ext[][PBCH_MAX_RE_PER_SYMBOL],
+					                        int nb_re,
+					                        struct complex16 rxdataF_comp[][PBCH_MAX_RE_PER_SYMBOL],
+					                        NR_DL_FRAME_PARMS *frame_parms,
+					                        uint8_t output_shift);
+void nr_pbch_unscrambling(int16_t *demod_pbch_e,
+                          uint16_t Nid,
+                          uint8_t nushift,
+                          uint16_t M,
+                          uint16_t length,
+                          uint8_t bitwise,
+                          uint32_t unscrambling_mask,
+                          uint32_t pbch_a_prime,
+                          uint32_t *pbch_a_interleaved);
+void nr_pbch_quantize(int16_t *pbch_llr8, int16_t *pbch_llr, uint16_t len);
 /**@}*/
 #endif
 

openair1/PHY/NR_UE_TRANSPORT/pss_nr.c

@@ -704,3 +704,103 @@ static int pss_search_time_nr(c16_t **rxdata, PHY_VARS_NR_UE *ue, int fo_flag, i
   return peak_position;
 }
 
+void sl_generate_pss(SL_NR_UE_INIT_PARAMS_t *sl_init_params, uint8_t n_sl_id2, uint16_t scaling)
+{
+
+  int i = 0, m = 0;
+  int16_t x[SL_NR_PSS_SEQUENCE_LENGTH];
+  const int x_initial[7] = {0, 1, 1 , 0, 1, 1, 1};
+  int16_t *sl_pss = sl_init_params->sl_pss[n_sl_id2];
+  int16_t *sl_pss_for_sync = sl_init_params->sl_pss_for_sync[n_sl_id2];
+
+  LOG_D(PHY, "SIDELINK PSBCH INIT: PSS Generation with N_SL_id2:%d\n", n_sl_id2);
+
+#ifdef SL_DEBUG_INIT
+  printf("SIDELINK: PSS Generation with N_SL_id2:%d\n", n_sl_id2);
+#endif
+
+  /// Sequence generation
+  for (i=0; i < 7; i++)
+    x[i] = x_initial[i];
+
+  for (i=0; i < (SL_NR_PSS_SEQUENCE_LENGTH - 7); i++) {
+    x[i+7] = (x[i + 4] + x[i]) %2;
+  }
+
+  for (i=0; i < SL_NR_PSS_SEQUENCE_LENGTH; i++) {
+    m = (i + 22 + 43*n_sl_id2) % SL_NR_PSS_SEQUENCE_LENGTH;
+    sl_pss_for_sync[i] = (1 - 2*x[m]);
+    sl_pss[i] = sl_pss_for_sync[i] * scaling;
+
+#ifdef SL_DEBUG_INIT_DATA
+  printf("m:%d, sl_pss[%d]:%d\n", m, i, sl_pss[i]);
+#endif
+
+  }
+
+#ifdef SL_DUMP_INIT_SAMPLES
+  LOG_M("sl_pss_seq.m", "sl_pss", (void*)sl_pss, SL_NR_PSS_SEQUENCE_LENGTH, 1, 0);
+#endif
+
+
+
+}
+
+// This cannot be done at init time as ofdm symbol size, ssb start subcarrier depends on configuration
+// done at SLSS read time.
+void sl_generate_pss_ifft_samples(sl_nr_ue_phy_params_t *sl_ue_params, SL_NR_UE_INIT_PARAMS_t *sl_init_params)
+{
+
+  uint8_t id2 = 0;
+  int16_t *sl_pss = NULL;
+  NR_DL_FRAME_PARMS *sl_fp = &sl_ue_params->sl_frame_params;
+  int16_t scaling_factor = AMP;
+
+  int32_t *pss_T = NULL;
+
+  uint16_t k = 0;
+
+  c16_t pss_F[sl_fp->ofdm_symbol_size]; // IQ samples in freq domain
+
+  LOG_I(PHY, "SIDELINK INIT: Generation of PSS time domain samples. scaling_factor:%d\n", scaling_factor);
+
+  for (id2 = 0; id2 < SL_NR_NUM_IDs_IN_PSS; id2++) {
+
+    k = sl_fp->first_carrier_offset + sl_fp->ssb_start_subcarrier + 2; // PSS in from REs 2-129
+    if (k >= sl_fp->ofdm_symbol_size) k -= sl_fp->ofdm_symbol_size;
+
+    pss_T = &sl_init_params->sl_pss_for_correlation[id2][0];
+    sl_pss = sl_init_params->sl_pss[id2];
+
+    memset(pss_T, 0, sl_fp->ofdm_symbol_size * sizeof(pss_T[0]));
+    memset(pss_F, 0, sl_fp->ofdm_symbol_size * sizeof(c16_t));
+
+    for (int i=0; i < SL_NR_PSS_SEQUENCE_LENGTH; i++) {
+
+      pss_F[k].r = (sl_pss[i] * scaling_factor) >> 15;
+      //pss_F[2*k] = (sl_pss[i]/23170) * 4192;
+      //pss_F[2*k+1] = 0;
+
+#ifdef SL_DEBUG_INIT_DATA
+      printf("id:%d, k:%d, pss_F[%d]:%d, sl_pss[%d]:%d\n", id2, k, 2*k, pss_F[2*k], i, sl_pss[i]);
+#endif
+
+      k++;
+      if (k == sl_fp->ofdm_symbol_size) k=0;
+
+    }
+
+      idft((int16_t)get_idft(sl_fp->ofdm_symbol_size),
+           (int16_t *)&pss_F[0],   /* complex input */
+           (int16_t *)&pss_T[0],  /* complex output */
+           1);                 /* scaling factor */
+
+  }
+
+#ifdef SL_DUMP_PSBCH_TX_SAMPLES
+  LOG_M("sl_pss_TD_id0.m", "pss_TD_0", (void*)sl_init_params->sl_pss_for_correlation[0], sl_fp->ofdm_symbol_size, 1, 1);
+  LOG_M("sl_pss_TD_id1.m", "pss_TD_1", (void*)sl_init_params->sl_pss_for_correlation[1], sl_fp->ofdm_symbol_size, 1, 1);
+#endif
+
+}
+

openair1/PHY/NR_UE_TRANSPORT/sss_nr.c

@@ -63,13 +63,6 @@
 
 #define INITIAL_SSS_NR    (7)
 
-static const int16_t phase_re_nr[PHASE_HYPOTHESIS_NUMBER]
-    // -pi/3 ---- pi/3
-    = {16384, 20173, 23571, 26509, 28932, 30791, 32051, 32687, 32687, 32051, 30791, 28932, 26509, 23571, 20173, 16384};
-
-static const int16_t phase_im_nr[PHASE_HYPOTHESIS_NUMBER] // -pi/3 ---- pi/3
-    = {-28377, -25821, -22762, -19260, -15383, -11207, -6813, -2286, 2286, 6813, 11207, 15383, 19260, 22762, 25821, 28377};
-
 static int16_t d_sss[N_ID_2_NUMBER][N_ID_1_NUMBER][LENGTH_SSS_NR];
 
 void init_context_sss_nr(int amp)
@@ -475,7 +468,7 @@ bool rx_sss_nr(PHY_VARS_NR_UE *ue,
 
       // This is the inner product using one particular value of each unknown parameter
       for (i=0; i < LENGTH_SSS_NR; i++) {
-        metric_re += d[i] * ((phase_re_nr[phase] * sss[i].r - phase_im_nr[phase] * sss[i].i) >> SCALING_METRIC_SSS_NR);
+        metric_re += d[i] * ((phase_nr[phase].r * sss[i].r - phase_nr[phase].i * sss[i].i) >> SCALING_METRIC_SSS_NR);
       }
 
       metric = metric_re;
@@ -537,3 +530,54 @@ bool rx_sss_nr(PHY_VARS_NR_UE *ue,
 
   return true;
 }
+
+void sl_generate_sss(SL_NR_UE_INIT_PARAMS_t *sl_init_params, uint16_t slss_id, uint16_t scaling)
+{
+
+  int i = 0;
+  int m0, m1;
+  int n_sl_id1, n_sl_id2;
+  int16_t *sl_sss = sl_init_params->sl_sss[slss_id];
+  int16_t *sl_sss_for_sync = sl_init_params->sl_sss_for_sync[slss_id];
+
+  int16_t x0[SL_NR_SSS_SEQUENCE_LENGTH], x1[SL_NR_SSS_SEQUENCE_LENGTH];
+  const int x_initial[7] = { 1, 0, 0, 0, 0, 0, 0 };
+
+  n_sl_id1 = slss_id % 336;
+  n_sl_id2 = slss_id / 336;
+
+  LOG_D(PHY, "SIDELINK INIT: SSS Generation with N_SL_id1:%d N_SL_id2:%d\n", n_sl_id1, n_sl_id2);
+
+#ifdef SL_DEBUG_INIT
+  printf("SIDELINK: SSS Generation with slss_id:%d, N_SL_id1:%d, N_SL_id2:%d\n", slss_id, n_sl_id1, n_sl_id2);
+#endif
+
+  for ( i=0 ; i < 7 ; i++) {
+    x0[i] = x_initial[i];
+    x1[i] = x_initial[i];
+  }
+
+  for ( i=0 ; i < SL_NR_SSS_SEQUENCE_LENGTH - 7 ; i++) {
+    x0[i+7] = (x0[i + 4] + x0[i]) % 2;
+    x1[i+7] = (x1[i + 1] + x1[i]) % 2;
+  }
+
+  m0 = 15*(n_sl_id1/112) + (5*n_sl_id2);
+  m1 = n_sl_id1 % 112;
+
+  for (i = 0; i < SL_NR_SSS_SEQUENCE_LENGTH ; i++) {
+    sl_sss_for_sync[i] = (1 - 2*x0[(i + m0) % SL_NR_SSS_SEQUENCE_LENGTH] ) * (1 - 2*x1[(i + m1) % SL_NR_SSS_SEQUENCE_LENGTH] );
+    sl_sss[i] = sl_sss_for_sync[i] * scaling;
+
+#ifdef SL_DEBUG_INIT_DATA
+  printf("m0:%d, m1:%d, sl_sss_for_sync[%d]:%d, sl_sss[%d]:%d\n", m0, m1, i, sl_sss_for_sync[i], i, sl_sss[i]);
+#endif
+
+  }
+
+#ifdef SL_DUMP_PSBCH_TX_SAMPLES
+  LOG_M("sl_sss_seq.m", "sl_sss", (void*)sl_sss, SL_NR_SSS_SEQUENCE_LENGTH, 1, 0);
+  LOG_M("sl_sss_forsync_seq.m", "sl_sss_for_sync", (void*)sl_sss_for_sync, SL_NR_SSS_SEQUENCE_LENGTH, 1, 0);
+#endif
+
+}

openair1/PHY/TOOLS/tools_defs.h

@@ -242,6 +242,13 @@ extern "C" {
     };
   }
 
+  __attribute__((always_inline)) inline c16_t c16xmulConstShift(const c16_t a, const int b, const int Shift) {
+    return (c16_t) {
+      .r = (int16_t)((a.r * b) >> Shift),
+      .i = (int16_t)((a.i * b) >> Shift)
+    };
+  }
+
   __attribute__((always_inline)) inline c32_t c32x16maddShift(const c16_t a, const c16_t b, const c32_t c, const int Shift) {
     return (c32_t) {
       .r = ((a.r * b.r - a.i * b.i) >> Shift) + c.r,

openair1/PHY/defs_nr_UE.h

@@ -39,6 +39,7 @@
 
 #include "defs_nr_common.h"
 #include "CODING/nrPolar_tools/nr_polar_pbch_defs.h"
+#include "PHY/defs_nr_sl_UE.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -591,6 +592,10 @@ typedef struct PHY_VARS_NR_UE_s {
   uint8_t *phy_sim_dlsch_b;
 
   notifiedFIFO_t tx_resume_ind_fifo[NR_MAX_SLOTS_PER_FRAME];
+
+  //Sidelink parameters
+  sl_nr_sidelink_mode_t sl_mode;
+  sl_nr_ue_phy_params_t SL_UE_PHY_PARAMS;
 } PHY_VARS_NR_UE;
 
 typedef struct {
@@ -612,11 +617,20 @@ typedef struct {
 typedef struct nr_phy_data_tx_s {
   NR_UE_ULSCH_t ulsch;
   NR_UE_PUCCH pucch_vars;
+
+  //Sidelink Rx action decided by MAC 
+  sl_nr_tx_config_type_enum_t sl_tx_action;
+  sl_nr_tx_config_psbch_pdu_t psbch_vars;
+
 } nr_phy_data_tx_t;
 
 typedef struct nr_phy_data_s {
   NR_UE_PDCCH_CONFIG phy_pdcch_config;
   NR_UE_DLSCH_t dlsch[2];
+
+  //Sidelink Rx action decided by MAC 
+  sl_nr_rx_config_type_enum_t sl_rx_action;
+
 } nr_phy_data_t;
 /* this structure is used to pass both UE phy vars and
  * proc to the function UE_thread_rxn_txnp4

openair1/PHY/defs_nr_common.h

@@ -96,6 +96,8 @@
 
 #define MAX_DELAY_COMP 20
 
+#define PBCH_MAX_RE_PER_SYMBOL (20*12)
+
 typedef enum {
   NR_MU_0=0,
   NR_MU_1,
@@ -168,8 +170,6 @@ struct NR_DL_FRAME_PARMS {
   /// Frame type (0 FDD, 1 TDD)
   frame_type_t frame_type;
   uint8_t tdd_config;
-  /// Sidelink Cell ID
-  uint16_t Nid_SL;
   /// Cell ID
   uint16_t Nid_cell;
   /// subcarrier spacing (15,30,60,120)

openair1/PHY/defs_nr_sl_UE.h

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+/*! \file PHY/defs_nr_sl_UE.h
+ \brief Top-level defines and structure definitions
+ \author
+ \date
+ \version
+ \company Fraunhofer
+ \email:
+ \note
+ \warning
+*/
+
+#ifndef	_DEFS_NR_SL_UE_H_
+#define	_DEFS_NR_SL_UE_H_
+
+
+
+#include "PHY/types.h"
+#include "PHY/defs_nr_common.h"
+#include "nfapi/open-nFAPI/nfapi/public_inc/sidelink_nr_ue_interface.h"
+#include "common/utils/time_meas.h"
+
+
+// (33*(13-4))
+// Normal CP - NUM_SSB_Symbols = 13. 4 symbols for PSS, SSS
+#define SL_NR_NUM_PSBCH_DMRS_RE  297
+//ceil(2(QPSK)*SL_NR_NUM_PSBCH_DMRS_RE/32)
+#define SL_NR_NUM_PSBCH_DMRS_RE_DWORD 20
+//11 RBs for PSBCH in one symbol * 12 REs
+#define SL_NR_NUM_PSBCH_RE_IN_ONE_SYMBOL 132
+//3 DMRS REs per RB * 11 RBS in one symbol
+#define SL_NR_NUM_PSBCH_DMRS_RE_IN_ONE_SYMBOL 33
+//9 PSBCH DATA REs * 11 RBS in one symbol
+#define SL_NR_NUM_PSBCH_DATA_RE_IN_ONE_SYMBOL 99
+#define SL_NR_NUM_PSBCH_RBS_IN_ONE_SYMBOL 11
+// SL_NR_POLAR_PSBCH_E_NORMAL_CP/2 bits because QPSK used for PSBCH.
+// 11 * (12-3 DMRS REs) * 9 symbols for PSBCH
+#define SL_NR_NUM_PSBCH_MODULATED_SYMBOLS 891
+#define SL_NR_NUM_PSBCH_DATA_RE_IN_ONE_RB 9
+#define SL_NR_NUM_PSBCH_DMRS_RE_IN_ONE_RB 3
+// 11 * (12-3 DMRS REs) * 9 symbols for PSBCH
+#define SL_NR_NUM_PSBCH_DATA_RE_IN_ALL_SYMBOLS 891
+
+
+
+#define SL_NR_NUM_SYMBOLS_SSB_NORMAL_CP 13
+#define SL_NR_NUM_SYMBOLS_SSB_EXT_CP 11
+#define SL_NR_NUM_PSS_SYMBOLS 2
+#define SL_NR_NUM_SSS_SYMBOLS 2
+#define SL_NR_PSS_START_SYMBOL 1
+#define SL_NR_SSS_START_SYMBOL 3
+#define SL_NR_NUM_PSS_OR_SSS_SYMBOLS 2
+#define SL_NR_PSS_SEQUENCE_LENGTH 127
+#define SL_NR_SSS_SEQUENCE_LENGTH 127
+#define SL_NR_NUM_IDs_IN_PSS 2
+#define SL_NR_NUM_IDs_IN_SSS 336
+#define SL_NR_NUM_SLSS_IDs 672
+
+typedef enum sl_nr_sidelink_mode {
+  SL_NOT_SUPPORTED = 0,
+  SL_MODE1_SUPPORTED,
+  SL_MODE2_SUPPORTED
+} sl_nr_sidelink_mode_t;
+
+//(11*(12-3 DMRS REs) * 2 (QPSK used)
+#define SL_NR_NUM_PSBCH_DATA_BITS_IN_ONE_SYMBOL 198
+
+typedef struct SL_NR_UE_INIT_PARAMS {
+
+  //gold sequences for PSBCH DMRS
+  uint32_t psbch_dmrs_gold_sequences[SL_NR_NUM_SLSS_IDs][SL_NR_NUM_PSBCH_DMRS_RE_DWORD]; // Gold sequences for PSBCH DMRS
+
+  //PSBCH DMRS QPSK modulated symbols for all possible SLSS Ids
+  struct complex16 psbch_dmrs_modsym[SL_NR_NUM_SLSS_IDs][SL_NR_NUM_PSBCH_DMRS_RE];
+
+  // Scaled values
+  int16_t sl_pss[SL_NR_NUM_IDs_IN_PSS][SL_NR_PSS_SEQUENCE_LENGTH];
+  int16_t sl_sss[SL_NR_NUM_SLSS_IDs][SL_NR_SSS_SEQUENCE_LENGTH];
+
+  // Contains Not scaled values just the simple generated sequence
+  int16_t sl_pss_for_sync[SL_NR_NUM_IDs_IN_PSS][SL_NR_PSS_SEQUENCE_LENGTH];
+  int16_t sl_sss_for_sync[SL_NR_NUM_SLSS_IDs][SL_NR_SSS_SEQUENCE_LENGTH];
+
+  int32_t **sl_pss_for_correlation; // IFFT samples for correlation
+
+} SL_NR_UE_INIT_PARAMS_t;
+
+typedef struct SL_NR_SYNC_PARAMS {
+
+  // Indicating start of SSB block in the initial set of samples
+  uint32_t ssb_offset;
+  // Freq Offset calculated
+  int32_t freq_offset;
+
+  uint32_t remaining_frames;
+  uint32_t rx_offset;
+  uint32_t slot_offset;
+  uint16_t N_sl_id2; //id2 determined from PSS during sync ref UE selection
+  uint16_t N_sl_id1; //id2 determined from SSS during sync ref UE selection
+  uint16_t N_sl_id; //ID calculated from ID1 and ID2
+  int32_t  psbch_rsrp; //rsrp of the decoded psbch during sync ref ue selection
+  uint32_t DFN; // DFN calculated after sync ref UE search
+
+} SL_NR_SYNC_PARAMS_t;
+
+typedef struct SL_NR_UE_PSBCH {
+
+  // AVG POWER OF PSBCH DMRS in dB/RE
+  int16_t rsrp_dB_per_RE;
+  // AVG POWER OF PSBCH DMRS in dBm/RE
+  int16_t rsrp_dBm_per_RE;
+
+  // STATS - CRC Errors observed during PSBCH reception
+  uint16_t rx_errors;
+
+  // STATS - Receptions with CRC OK
+  uint16_t rx_ok;
+
+  // STATS - transmissions of PSBCH by the UE
+  uint16_t num_psbch_tx;
+
+} SL_NR_UE_PSBCH_t;
+
+typedef struct sl_nr_ue_phy_params {
+
+  SL_NR_UE_INIT_PARAMS_t init_params;
+
+  SL_NR_SYNC_PARAMS_t sync_params;
+
+  // Sidelink PHY PARAMETERS USED FOR PSBCH reception/Txn
+  SL_NR_UE_PSBCH_t psbch;
+
+  //Configuration parameters from MAC
+  sl_nr_phy_config_request_t sl_config;
+
+  NR_DL_FRAME_PARMS sl_frame_params;
+
+  time_stats_t phy_proc_sl_tx;
+  time_stats_t phy_proc_sl_rx;
+  time_stats_t channel_estimation_stats;
+  time_stats_t ue_sl_indication_stats;
+
+} sl_nr_ue_phy_params_t;
+
+
+#endif
\ No newline at end of file

openair1/SCHED_NR_UE/defs.h

@@ -165,5 +165,28 @@ void nr_ue_csi_rs_procedures(PHY_VARS_NR_UE *ue,
                              const UE_nr_rxtx_proc_t *proc,
                              c16_t rxdataF[][ue->frame_parms.samples_per_slot_wCP]);
 
+
+int psbch_pscch_processing(PHY_VARS_NR_UE *ue,
+                            UE_nr_rxtx_proc_t *proc,
+                            nr_phy_data_t *phy_data);
+int phy_procedures_nrUE_SL_TX(PHY_VARS_NR_UE *ue,
+                            UE_nr_rxtx_proc_t *proc,
+                            nr_phy_data_tx_t *phy_data);
+/*! \brief This function prepares the sl indication to pass to the MAC
+ */
+void nr_fill_sl_indication(nr_sidelink_indication_t *sl_ind,
+                           sl_nr_rx_indication_t *rx_ind,
+                           sl_nr_sci_indication_t *sci_ind,
+                           UE_nr_rxtx_proc_t *proc,
+                           PHY_VARS_NR_UE *ue,
+                           void *phy_data);
+void nr_fill_sl_rx_indication(sl_nr_rx_indication_t *rx_ind,
+                              uint8_t pdu_type,
+                              PHY_VARS_NR_UE *ue,
+                              uint16_t n_pdus,
+                              UE_nr_rxtx_proc_t *proc,
+                              void *typeSpecific,
+                              uint16_t rx_slss_id);
+
 #endif
 /** @}*/

openair1/SCHED_NR_UE/phy_procedures_nr_ue.c

@@ -866,12 +866,15 @@ int pbch_pdcch_processing(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc, nr_
 
           for (int i=1; i<4; i++) {
             nr_slot_fep(ue,
+                        fp,
                         proc,
                         (ssb_start_symbol+i)%(fp->symbols_per_slot),
-                        rxdataF);
+                        rxdataF,
+                        link_type_dl);
 
             start_meas(&ue->dlsch_channel_estimation_stats);
             nr_pbch_channel_estimation(ue,
+                                       &ue->frame_parms,
                                        estimateSz,
                                        dl_ch_estimates,
                                        dl_ch_estimates_time,
@@ -880,7 +883,9 @@ int pbch_pdcch_processing(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc, nr_
                                        i-1,
                                        ssb_index&7,
                                        ssb_slot_2 == nr_slot_rx,
-                                       rxdataF);
+                                       rxdataF,
+                                       false,
+                                       fp->Nid_cell);
             stop_meas(&ue->dlsch_channel_estimation_stats);
           }
 
@@ -922,9 +927,11 @@ int pbch_pdcch_processing(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc, nr_
           for(int j = prs_config->SymbolStart; j < (prs_config->SymbolStart+prs_config->NumPRSSymbols); j++)
           {
             nr_slot_fep(ue,
+                        fp,
                         proc,
                         (j%fp->symbols_per_slot),
-                        rxdataF);
+                        rxdataF,
+                        link_type_dl);
           }
           nr_prs_channel_estimation(gNB_id, rsc_id, i, ue, proc, fp, rxdataF);
         }
@@ -956,9 +963,11 @@ int pbch_pdcch_processing(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc, nr_
 
     start_meas(&ue->ofdm_demod_stats);
     nr_slot_fep(ue,
+                fp,
                 proc,
                 l,
-                rxdataF);
+                rxdataF,
+                link_type_dl);
   }
 
     // Hold the channel estimates in frequency domain.
@@ -1016,9 +1025,11 @@ void pdsch_processing(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc, nr_phy_
 
     for (uint16_t m=start_symb_sch;m<(nb_symb_sch+start_symb_sch) ; m++){
       nr_slot_fep(ue,
+                  &ue->frame_parms,
                   proc,
                   m,  //to be updated from higher layer
-                  rxdataF);
+                  rxdataF,
+                  link_type_dl);
     }
     VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SLOT_FEP_PDSCH, VCD_FUNCTION_OUT);
 
@@ -1106,7 +1117,7 @@ void pdsch_processing(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc, nr_phy_
       }
       l_csiim[symb_idx] = ue->csiim_vars[gNB_id]->csiim_config_pdu.l_csiim[symb_idx];
       if(nr_slot_fep_done == false) {
-        nr_slot_fep(ue, proc, ue->csiim_vars[gNB_id]->csiim_config_pdu.l_csiim[symb_idx], rxdataF);
+        nr_slot_fep(ue, &ue->frame_parms, proc, ue->csiim_vars[gNB_id]->csiim_config_pdu.l_csiim[symb_idx], rxdataF, link_type_dl);
       }
     }
     nr_ue_csi_im_procedures(ue, proc, rxdataF);
@@ -1117,7 +1128,7 @@ void pdsch_processing(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc, nr_phy_
   if ((ue->csirs_vars[gNB_id]) && (ue->csirs_vars[gNB_id]->active == 1)) {
     for(int symb = 0; symb < NR_SYMBOLS_PER_SLOT; symb++) {
       if(is_csi_rs_in_symbol(ue->csirs_vars[gNB_id]->csirs_config_pdu,symb)) {
-        nr_slot_fep(ue, proc, symb, rxdataF);
+        nr_slot_fep(ue, &ue->frame_parms, proc, symb, rxdataF, link_type_dl);
       }
     }
     nr_ue_csi_rs_procedures(ue, proc, rxdataF);

openair1/SIMULATION/NR_PHY/pbchsim.c

@@ -786,36 +786,38 @@ int main(int argc, char **argv)
         int ssb_slot = (UE->symbol_offset/14)+(n_hf*(frame_parms->slots_per_frame>>1));
         proc.nr_slot_rx = ssb_slot;
         proc.gNB_id = 0;
-	for (int i=UE->symbol_offset+1; i<UE->symbol_offset+4; i++) {
+	      for (int i=UE->symbol_offset+1; i<UE->symbol_offset+4; i++) {
           nr_slot_fep(UE,
+                      frame_parms,
                       &proc,
                       i%frame_parms->symbols_per_slot,
-                      rxdataF);
+                      rxdataF, link_type_dl);
 
-          nr_pbch_channel_estimation(UE,estimateSz, dl_ch_estimates, dl_ch_estimates_time, &proc, 
-				     i%frame_parms->symbols_per_slot,i-(UE->symbol_offset+1),ssb_index%8,n_hf,rxdataF);
+          nr_pbch_channel_estimation(UE,&UE->frame_parms, estimateSz, dl_ch_estimates, dl_ch_estimates_time, &proc,
+                                     i%frame_parms->symbols_per_slot,i-(UE->symbol_offset+1),
+                                     ssb_index%8,n_hf,rxdataF,false,frame_parms->Nid_cell);
 
         }
-	fapiPbch_t result;
+	      fapiPbch_t result;
         ret = nr_rx_pbch(UE, &proc, estimateSz, dl_ch_estimates, frame_parms, ssb_index % 8, &result, rxdataF);
 
-	if (ret==0) {
-	  //UE->rx_ind.rx_indication_body->mib_pdu.ssb_index;  //not yet detected automatically
-	  //UE->rx_ind.rx_indication_body->mib_pdu.ssb_length; //Lmax, not yet detected automatically
-	  uint8_t gNB_xtra_byte=0;
-	  for (int i=0; i<8; i++)
-	    gNB_xtra_byte |= ((gNB->pbch.pbch_a>>(31-i))&1)<<(7-i);
- 
-	  payload_ret = (result.xtra_byte == gNB_xtra_byte);
-	  for (i=0;i<3;i++){
-	    payload_ret += (result.decoded_output[i] == ((msgDataTx.ssb[ssb_index].ssb_pdu.ssb_pdu_rel15.bchPayload>>(8*i)) & 0xff));
-	  } 
-	  //printf("ret %d\n", payload_ret);
-	  if (payload_ret!=4) 
-	    n_errors_payload++;
-	}
-
-	if (ret!=0) n_errors++;
+        if (ret==0) {
+          //UE->rx_ind.rx_indication_body->mib_pdu.ssb_index;  //not yet detected automatically
+          //UE->rx_ind.rx_indication_body->mib_pdu.ssb_length; //Lmax, not yet detected automatically
+          uint8_t gNB_xtra_byte=0;
+          for (int i=0; i<8; i++)
+            gNB_xtra_byte |= ((gNB->pbch.pbch_a>>(31-i))&1)<<(7-i);
+      
+          payload_ret = (result.xtra_byte == gNB_xtra_byte);
+          for (i=0;i<3;i++){
+            payload_ret += (result.decoded_output[i] == ((msgDataTx.ssb[ssb_index].ssb_pdu.ssb_pdu_rel15.bchPayload>>(8*i)) & 0xff));
+          } 
+          //printf("ret %d\n", payload_ret);
+          if (payload_ret!=4) 
+            n_errors_payload++;
+        }
+
+        if (ret!=0) n_errors++;
       }
     } //noise trials
     printf("SNR %f: trials %d, n_errors_crc = %d, n_errors_payload %d\n", SNR,n_trials,n_errors,n_errors_payload);

openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.h

@@ -98,7 +98,7 @@ typedef struct {
     uint32_t gNB_index;
     /// component carrier id
     int cc_id;
-    /// frame
+    /// frame rx
     frame_t frame_rx;
     /// slot rx
     uint32_t slot_rx;