Using only one nr_modulation funtion across the code

cmake_targets/CMakeLists.txt

@@ -1272,6 +1272,7 @@ set(PHY_SRC_UE
   set(PHY_NR_SRC
   ${OPENAIR1_DIR}/PHY/INIT/nr_init.c
   ${OPENAIR1_DIR}/PHY/INIT/nr_parms.c
+  ${OPENAIR1_DIR}/PHY/MODULATION/nr_modulation.c
   ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_pss.c
   ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_sss.c
   ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_pbch.c
@@ -1303,8 +1304,9 @@ set(PHY_SRC_UE
   )
 
   set(PHY_NR_UE_SRC
-  ${OPENAIR1_DIR}/PHY/MODULATION/slot_fep_nr.c
   ${OPENAIR1_DIR}/PHY/INIT/nr_parms.c
+  ${OPENAIR1_DIR}/PHY/MODULATION/nr_modulation.c
+  ${OPENAIR1_DIR}/PHY/MODULATION/slot_fep_nr.c
   ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/pss_nr.c
   ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/sss_nr.c
   ${OPENAIR1_DIR}/PHY/NR_UE_TRANSPORT/cic_filter_nr.c

openair1/PHY/MODULATION/nr_modulation.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 1.1  (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
+ */
+
+#include "nr_modulation.h"
+
+extern short nr_mod_table[NR_MOD_TABLE_SIZE_SHORT];
+
+void nr_modulation(uint32_t *in,
+                   uint16_t length,
+                   uint16_t mod_order,
+                   int16_t *out) {
+
+  uint16_t offset;
+	uint16_t order;
+	int i,j;
+  uint8_t idx, b_idx;
+
+  offset = (mod_order==2)? NR_MOD_TABLE_QPSK_OFFSET : (mod_order==4)? NR_MOD_TABLE_QAM16_OFFSET : \
+                    (mod_order==6)? NR_MOD_TABLE_QAM64_OFFSET: (mod_order==8)? NR_MOD_TABLE_QAM256_OFFSET : 0;
+
+  for (i=0; i<length/mod_order; i++) {
+    idx = 0;
+
+    for (j=0; j<mod_order; j++) {
+      b_idx = (i*mod_order+j)&0x1f;
+      if (i && (!b_idx))
+        in++;
+      idx ^= (((*in)>>b_idx)&1)<<(mod_order-j-1);
+    }
+
+    out[i<<1] = nr_mod_table[(offset+idx)<<1];
+    out[(i<<1)+1] = nr_mod_table[((offset+idx)<<1)+1];
+  }
+}
\ No newline at end of file

openair1/PHY/MODULATION/nr_modulation.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
+ */
+
+#ifndef __NR_MODULATION_H__
+#define __NR_MODULATION_H__
+
+#include <stdint.h>
+#include "PHY/defs_nr_common.h"
+
+/*! \brief Perform NR modulation. TS 38.211 V15.4.0 subclause 5.1
+  @param[in] in, Pointer to input bits
+  @param[in] length, size of input bits
+  @param[in] modulation_type, modulation order
+  @param[out] out, complex valued modulated symbols
+*/
+
+void nr_modulation(uint32_t *in,
+                   uint16_t length,
+                   uint16_t mod_order,
+                   int16_t *out);
+
+#endif
\ No newline at end of file

openair1/PHY/NR_TRANSPORT/nr_dci.c

@@ -32,14 +32,13 @@
 
 #include "nr_dci.h"
 #include "nr_dlsch.h"
+#include "PHY/MODULATION/nr_modulation.h"
 
 //#define DEBUG_PDCCH_DMRS
 //#define DEBUG_DCI
 //#define DEBUG_CHANNEL_CODING
 
 
-extern short nr_mod_table[NR_MOD_TABLE_SIZE_SHORT];
-
 uint16_t nr_get_dci_size(nfapi_nr_dci_format_e format,
                          nfapi_nr_rnti_type_e rnti_type,
                          uint16_t N_RB,
@@ -217,9 +216,9 @@ uint8_t nr_generate_dci_top(NR_gNB_PDCCH pdcch_vars,
 #endif
       }
 
-      nr_modulation(dmrs_seq, dmrs_length, MOD_QPSK, mod_dmrs[symb]);
+      nr_modulation(dmrs_seq, dmrs_length, 2, mod_dmrs[symb]); //Qm = 2 as DMRS is QPSK modulated
     } else
-      nr_modulation(gold_pdcch_dmrs[symb], dmrs_length, MOD_QPSK, mod_dmrs[symb]);
+      nr_modulation(gold_pdcch_dmrs[symb], dmrs_length, 2, mod_dmrs[symb]); //Qm = 2 as DMRS is QPSK modulated
 
 #ifdef DEBUG_PDCCH_DMRS
 
@@ -264,7 +263,7 @@ uint8_t nr_generate_dci_top(NR_gNB_PDCCH pdcch_vars,
 #endif
   /// QPSK modulation
   int16_t mod_dci[NR_MAX_DCI_SIZE>>1];
-  nr_modulation(scrambled_output, encoded_length, MOD_QPSK, mod_dci);
+  nr_modulation(scrambled_output, encoded_length, 2, mod_dci); //Qm = 2 as DMRS is QPSK modulated
 #ifdef DEBUG_DCI
 
   for (int i=0; i<encoded_length>>1; i++)

openair1/PHY/NR_TRANSPORT/nr_dlsch.c

@@ -33,13 +33,11 @@
 #include "nr_dlsch.h"
 #include "nr_dci.h"
 #include "nr_sch_dmrs.h"
+#include "PHY/MODULATION/nr_modulation.h"
 
 //#define DEBUG_DLSCH
 //#define DEBUG_DLSCH_MAPPING
 
-uint8_t mod_order[5] = {1, 2, 4, 6, 8};
-uint16_t mod_offset[5] = {1,3,7,23,87};
-
 void nr_pdsch_codeword_scrambling(uint8_t *in,
                          uint16_t size,
                          uint8_t q,
@@ -67,54 +65,6 @@ void nr_pdsch_codeword_scrambling(uint8_t *in,
 
 }
 
-void nr_modulation(uint32_t *in,
-                   uint16_t length,
-                   nr_mod_t modulation_type,
-                   int16_t *out) {
-
-  uint16_t offset;
-	uint16_t order;
-	order = mod_order[modulation_type];
-	offset = mod_offset[modulation_type];
-   
-  for (int i=0; i<length/order; i++) {
-    uint8_t idx = 0, b_idx;
-
-    for (int j=0; j<order; j++) {
-      b_idx = (i*order+j)&0x1f;
-      if (i && (!b_idx))
-        in++;
-      idx ^= (((*in)>>b_idx)&1)<<(order-j-1);
-    }
-
-    out[i<<1] = nr_mod_table[(offset+idx)<<1];
-    out[(i<<1)+1] = nr_mod_table[((offset+idx)<<1)+1];
-  }
-}
-
-void nr_pdsch_codeword_modulation(uint32_t *in,
-                         uint8_t  Qm,
-                         uint32_t length,
-                         int16_t *out) {
-
-  uint16_t offset = (Qm==2)? NR_MOD_TABLE_QPSK_OFFSET : (Qm==4)? NR_MOD_TABLE_QAM16_OFFSET : \
-                    (Qm==6)? NR_MOD_TABLE_QAM64_OFFSET: (Qm==8)? NR_MOD_TABLE_QAM256_OFFSET : 0;
-  AssertFatal(offset, "Invalid modulation order %d\n", Qm);
-
-  for (int i=0; i<length/Qm; i++) {
-    uint8_t idx = 0, b_idx;
-
-    for (int j=0; j<Qm; j++) {
-      b_idx = (i*Qm+j)&0x1f;
-      if (i && (!b_idx))
-        in++;
-      idx ^= (((*in)>>b_idx)&1)<<(Qm-j-1);
-    }
-
-    out[i<<1] = nr_mod_table[(offset+idx)<<1];
-    out[(i<<1)+1] = nr_mod_table[((offset+idx)<<1)+1];
-  }
-}
 
 void nr_pdsch_layer_mapping(int16_t **mod_symbs,
                          uint8_t n_layers,
@@ -255,10 +205,11 @@ for (int i=0; i<encoded_length>>8; i++) {
 #endif
  
   /// Modulation
+
   for (int q=0; q<rel15->nb_codewords; q++)
-    nr_pdsch_codeword_modulation(scrambled_output[q],
-                         Qm,
+    nr_modulation(scrambled_output[q],
                          encoded_length,
+                         Qm,
                          mod_symbs[q]);
 #ifdef DEBUG_DLSCH
 printf("PDSCH Modulation: Qm %d(%d)\n", Qm, nb_symbols);
@@ -297,8 +248,8 @@ for (int l=0; l<rel15->nb_layers; l++)
   uint8_t mapping_type = config.pdsch_config.mapping_type.value;
 
   l0 = get_l0(mapping_type, 2);//config.pdsch_config.dmrs_typeA_position.value);
-  nr_modulation(pdsch_dmrs[l0][0], n_dmrs, MOD_QPSK, mod_dmrs); // currently only codeword 0 is modulated
-  
+  nr_modulation(pdsch_dmrs[l0][0], n_dmrs, 2, mod_dmrs); // currently only codeword 0 is modulated. Qm = 2 as DMRS is QPSK modulated
+
 #ifdef DEBUG_DLSCH
 printf("DMRS modulation (single symbol %d, %d symbols, type %d):\n", l0, n_dmrs>>1, dmrs_type);
 for (int i=0; i<n_dmrs>>4; i++) {

openair1/PHY/NR_TRANSPORT/nr_dlsch.h

@@ -30,9 +30,10 @@
 * \warning
 */
 
-#include "PHY/defs_gNB.h"
+#ifndef __NR_DLSCH__H
+#define __NR_DLSCH__H
 
-extern short nr_mod_table[NR_MOD_TABLE_SIZE_SHORT];
+#include "PHY/defs_gNB.h"
 
 void nr_get_time_domain_allocation_type(nfapi_nr_config_request_t config,
                                         nfapi_nr_dl_config_dci_dl_pdu dci_pdu,
@@ -67,16 +68,6 @@ void nr_pdsch_codeword_scrambling(uint8_t *in,
                          uint32_t n_RNTI,
                          uint32_t* out);
 
-void nr_modulation(uint32_t *in,
-                   uint16_t length,
-                   nr_mod_t modulation_type,
-                   int16_t *out);
-
-void nr_pdsch_codeword_modulation(uint32_t *in,
-                         uint8_t  Qm,
-                         uint32_t length,
-                         int16_t *out);
-
 void nr_pdsch_layer_mapping(int16_t **mod_symbs,
                          uint8_t n_layers,
                          uint16_t n_symbs,
@@ -120,3 +111,4 @@ int nr_dlsch_encoding(unsigned char *a,int frame,
 
 void nr_emulate_dlsch_payload(uint8_t* payload, uint16_t size);
 
+#endif

openair1/PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h

@@ -1070,18 +1070,6 @@ void nr_pusch_codeword_scrambling(uint8_t *in,
                          uint32_t* out);
 
 
-/*! \brief Perform PUSCH modulation. TS 38.211 V15.4.0 subclause 6.3.1.2
-  @param[in] in, Pointer to input bits
-  @param[in] Qm, modulation order
-  @param[in] length, size of input bits
-  @param[out] out, complex valued modulated symbols
-*/
-
-void nr_pusch_codeword_modulation(uint32_t *in,
-                         uint8_t  Qm,
-                         uint32_t length,
-                         int16_t *out);
-
 
 uint32_t  nr_dlsch_decoding_mthread(PHY_VARS_NR_UE *phy_vars_ue,
 						 UE_nr_rxtx_proc_t *proc,

openair1/PHY/NR_UE_TRANSPORT/nr_ulsch.c

@@ -34,8 +34,6 @@
 #include "PHY/NR_TRANSPORT/nr_transport_common_proto.h"
 #include "PHY/defs_nr_common.h"
 
-extern short nr_mod_table[NR_MOD_TABLE_SIZE_SHORT];
-
 
 
 void nr_pusch_codeword_scrambling(uint8_t *in,
@@ -67,29 +65,4 @@ void nr_pusch_codeword_scrambling(uint8_t *in,
     //printf("i %d b_idx %d in %d s 0x%08x out 0x%08x\n", i, b_idx, in[i], s, *out);
   }
 
-}
-
-// This function is copied from PHY/NR_TRANSPORT/nr_dlsch.c
-void nr_pusch_codeword_modulation(uint32_t *in,
-                         uint8_t  Qm,
-                         uint32_t length,
-                         int16_t *out) {
-
-  uint16_t offset = (Qm==2)? NR_MOD_TABLE_QPSK_OFFSET : (Qm==4)? NR_MOD_TABLE_QAM16_OFFSET : \
-                    (Qm==6)? NR_MOD_TABLE_QAM64_OFFSET: (Qm==8)? NR_MOD_TABLE_QAM256_OFFSET : 0;
-  AssertFatal(offset, "Invalid modulation order %d\n", Qm);
-
-  for (int i=0; i<length/Qm; i++) {
-    uint8_t idx = 0, b_idx;
-
-    for (int j=0; j<Qm; j++) {
-      b_idx = (i*Qm+j)&0x1f;
-      if (i && (!b_idx))
-        in++;
-      idx ^= (((*in)>>b_idx)&1)<<(Qm-j-1);
-    }
-
-    out[i<<1] = nr_mod_table[(offset+idx)<<1];
-    out[(i<<1)+1] = nr_mod_table[((offset+idx)<<1)+1];
-  }
-}
+}
\ No newline at end of file

openair1/SIMULATION/NR_PHY/ulsim.c

@@ -40,6 +40,7 @@
 #include "PHY/INIT/phy_init.h"
 #include "PHY/NR_REFSIG/refsig_defs_ue.h"
 #include "PHY/NR_REFSIG/nr_mod_table.h"
+#include "PHY/MODULATION/nr_modulation.h"
 #include "PHY/MODULATION/modulation_eNB.h"
 #include "PHY/MODULATION/modulation_UE.h"
 #include "PHY/NR_TRANSPORT/nr_transport.h"
@@ -569,10 +570,10 @@ int main(int argc, char **argv) {
   /////////////////////////ULSCH modulation/////////////////////////
   ///////////
 
-  nr_pusch_codeword_modulation(scrambled_output[0], // assume one codeword for the moment
-                               mod_order,
-                               encoded_length,
-                               ulsch_ue->d);
+  nr_modulation(scrambled_output[0], // assume one codeword for the moment
+                encoded_length,
+                mod_order,
+                ulsch_ue->d);
 
   ///////////
   ////////////////////////////////////////////////////////////////////////