integrate send_IF4 with alaw lut

openair1/PHY/LTE_TRANSPORT/if4_tools.c

@@ -29,7 +29,7 @@
 
 /*! \file PHY/LTE_TRANSPORT/if4_tools.c
 * \brief 
-* \author Mauricio Gunther, S. Sandeep Kumar, Raymond Knopp
+* \author Fredrik Skretteberg, Tobias Schuster, Mauricio Gunther, S. Sandeep Kumar, Raymond Knopp
 * \date 2016
 * \version 0.1
 * \company Eurecom
@@ -43,6 +43,7 @@
 #include <stdint.h>
 #else
 #include "PHY/LTE_TRANSPORT/if4_tools.h"
+#include "PHY/TOOLS/ALAW/alaw_lut.h"
 #endif
 
 // Get device information
@@ -50,11 +51,15 @@ void send_IF4(PHY_VARS_eNB *eNB, eNB_rxtx_proc_t *proc) {
 	int frame = proc->frame_tx;
 	int subframe = proc->subframe_tx;
 	LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
+	int32_t **txdataF = eNB->common_vars.txdataF[0];
   
-	uint16_t i;
+	uint16_t symbol_id, element_id;
+  uint16_t db_fulllength = 12*fp->N_RB_DL;
+  uint16_t db_halflength = db_fulllength>>1;
+  int slotoffsetF = (subframe_tx)*(fp->ofdm_symbol_size)*((fp->Ncp==1) ? 12 : 14) + 1;
+  int blockoffsetF = slotoffsetF + fp->ofdm_symbol_size - db_halflength; 
   
-  float_t data_block_length = 1200*(fp->ofdm_symbol_size/2048);
-  uint16_t *data_block = (uint16_t*)malloc(data_block_length*sizeof(uint16_t));
+  int16_t *data_block = (int16_t*)malloc(db_fulllength*sizeof(int16_t));  
 
   // Caller: RCC - DL *** handle RRU case - UL and PRACH *** 
   if (eNB->node_function == NGFI_RCC_IF4) {
@@ -63,13 +68,16 @@ void send_IF4(PHY_VARS_eNB *eNB, eNB_rxtx_proc_t *proc) {
 		
     dl_packet->data_block = data_block;
 
-    for(i=0; i<fp->symbols_per_tti; i++) {
+    for (symbol_id=0; symbol_id<fp->symbols_per_tti; symbol_id++) {
 
-      //Do compression of the two parts and generate data blocks
+      // Do compression of the two parts and generate data blocks			
+      for (element_id=0; element_id<db_halflength; element_id++) {
+        data_block[element_id]  = lin2alaw[ (txdataF[0][blockoffsetF+element_id])&0xffff + 32768 ];          
+        data_block[element_id] |= lin2alaw[ (txdataF[0][blockoffsetF+element_id])>>16 + 32768 ]<<8;  
         
-      //symbol = eNB->common_vars.txdataF[0][0 /*antenna number*/][subframe*fp->ofdm_symbol_size*(fp->symbols_per_tti)]
-      //data_block[j] = Atan(symbol[fp->ofmd_symbol_size - NrOfNonZeroValues + j -1])<<16 + Atan(symbol[fp->ofmd_symbol_size - NrOfNonZeroValues + j]);
-      //data_block[j+NrOfNonZeroValues] = Atan(subframe[i][j+1])<<16 + Atan(subframe[i][j+2]);
+        data_block[element_id+db_halflength]  = lin2alaw[ (txdataF[0][slotoffsetF+element_id])&0xffff + 32768 ];     
+        data_block[element_id+db_halflength] |= lin2alaw[ (txdataF[0][slotoffsetF+element_id])>>16 + 32768 ]<<8;  
+      }
 				 		
       // Update information in generated packet
       dl_packet->frame_status.sym_num = i; 
@@ -83,6 +91,9 @@ void send_IF4(PHY_VARS_eNB *eNB, eNB_rxtx_proc_t *proc) {
       //                                               0)) < 0) {
       //  perror("RCC : ETHERNET write");
       //}
+      
+      slotoffsetF  += fp->ofdm_symbol_size;
+      blockoffsetF += fp->ofdm_symbol_size;    
     }
   }else {
     IF4_ul_packet_t *ul_packet = (IF4_ul_packet_t*)malloc(sizeof_IF4_ul_packet_t);
@@ -90,32 +101,34 @@ void send_IF4(PHY_VARS_eNB *eNB, eNB_rxtx_proc_t *proc) {
 		
     ul_packet->data_block = data_block;
 
-    for(i=0; i<fp->symbols_per_tti; i++) {
+    for (symbol_id=0; symbol_id<fp->symbols_per_tti; symbol_id++) {			
 
-      //Do compression of the two parts and generate data blocks
+      // Do compression of the two parts and generate data blocks			
+      for (element_id=0; element_id<db_halflength; element_id++) {
+        data_block[element_id]  = lin2alaw[ (txdataF[0][blockoffsetF+element_id])&0xffff + 32768 ];          
+        data_block[element_id] |= lin2alaw[ (txdataF[0][blockoffsetF+element_id])>>16 + 32768 ]<<8;  
         
-      //symbol = eNB->common_vars.txdataF[0][0 /*antenna number*/][subframe*fp->ofdm_symbol_size*(fp->symbols_per_tti)]
-      //data_block[j] = Atan(symbol[fp->ofmd_symbol_size - NrOfNonZeroValues + j -1])<<16 + Atan(symbol[fp->ofmd_symbol_size - NrOfNonZeroValues + j]);
-      //data_block[j+NrOfNonZeroValues] = Atan(subframe[i][j+1])<<16 + Atan(subframe[i][j+2]);
+        data_block[element_id+db_halflength]  = lin2alaw[ (txdataF[0][slotoffsetF+element_id])&0xffff + 32768 ];     
+        data_block[element_id+db_halflength] |= lin2alaw[ (txdataF[0][slotoffsetF+element_id])>>16 + 32768 ]<<8;  
+      }
        			
       // Update information in generated packet
       ul_packet->frame_status.sym_num = i; 
 			
       // Write the packet(s) to the fronthaul 
 
+      slotoffsetF  += fp->ofdm_symbol_size;
+      blockoffsetF += fp->ofdm_symbol_size;    
     }		
 	}
   		    
 }
 
-void recv_IF4(PHY_VARS_eNB *eNB, eNB_rxtx_proc_t *proc) {
+void recv_IF4(PHY_VARS_eNB *eNB, eNB_rxtx_proc_t *proc, uint16_t *packet_type, uint32_t *symbol_number) {
 
   // Caller: RRU - DL *** handle RCC case - UL and PRACH *** 
-
   if (eNB->node_function == NGFI_RRU_IF4) {
   
-  
-  
     for(i=0; i<fp->symbols_per_tti; i++) {  
       // Read packet(s) from the fronthaul    
       if (dev->eth_dev.trx_read_func (&dev->eth_dev,
@@ -140,7 +153,7 @@ void recv_IF4(PHY_VARS_eNB *eNB, eNB_rxtx_proc_t *proc) {
 
 void gen_IF4_dl_packet(IF4_dl_packet_t *dl_packet, eNB_rxtx_proc_t *proc) {      
   // Set Type and Sub-Type
-  dl_packet->type = 0x080A; 
+  dl_packet->type = IF4_PACKET_TYPE; 
   dl_packet->sub_type = IF4_PDLFFT;
 
   // Leave reserved as it is 
@@ -160,7 +173,7 @@ void gen_IF4_dl_packet(IF4_dl_packet_t *dl_packet, eNB_rxtx_proc_t *proc) {
 
 void gen_IF4_ul_packet(IF4_ul_packet_t *ul_packet, eNB_rxtx_proc_t *proc) {  
   // Set Type and Sub-Type
-  ul_packet->type = 0x080A; 
+  ul_packet->type = IF4_PACKET_TYPE; 
   ul_packet->sub_type = IF4_PULFFT;
 
   // Leave reserved as it is 
@@ -184,7 +197,7 @@ void gen_IF4_ul_packet(IF4_ul_packet_t *ul_packet, eNB_rxtx_proc_t *proc) {
 
 void gen_IF4_prach_packet(IF4_prach_packet_t *prach_packet, eNB_rxtx_proc_t *proc) {
   // Set Type and Sub-Type
-  prach_packet->type = 0x080A; 
+  prach_packet->type = IF4_PACKET_TYPE; 
   prach_packet->sub_type = IF4_PRACH;
 
   // Leave reserved as it is 

openair1/PHY/LTE_TRANSPORT/if4_tools.h

@@ -38,6 +38,8 @@
 * \warning
 */
 
+/// Macro for IF4 packet type
+#define IF4_PACKET_TYPE 0x080A 
 #define IF4_PULFFT 0x0019 
 #define IF4_PDLFFT 0x0020
 #define IF4_PRACH 0x0021
@@ -179,4 +181,4 @@ void gen_IF4_prach_packet(IF4_prach_packet_t*, eNB_rxtx_proc_t*);
 
 void send_IF4(PHY_VARS_eNB*, eNB_rxtx_proc_t*);
 
-void recv_IF4(PHY_VARS_eNB*, eNB_rxtx_proc_t*, int*, int*);
+void recv_IF4(PHY_VARS_eNB*, eNB_rxtx_proc_t*, uint16_t*, uint32_t*);