add synchro signals functions for NB-IoT

still needs integration

openair1/PHY/LTE_REFSIG/primary_synch_NB_IoT.h

+/***********************************************************************
+
+**********************************************************************/
+/*! \file PHY/LTE_REFSIG/primary_synch_NB_IoT.c
+* \Narrowband Primary Synchronisation Signal(NPSS) for NB-IoT,  TS 36-212, V13.4.0 2017-02
+* \author M. KANJ
+* \date 2017
+* \version 0.0
+* \company bcom
+* \email: matthieu.kanj@b-com.com
+* \note
+* \warning
+*/
+
+// 12x11= 132 RE ( x 2= 264 since Re,Img).
+// For the In-band case: the RE dedicated to LTE pilots are supposed to overwrite 16 REs of the NPSS signal.
+
+short primary_synch_NB_IoT[264] = {32767,0,-31440,-9232,-21458,-24764,-4664,32433,-31440,9231,13611,29805,-31440,9231,-4664,32433,-21458,-24764,-31440,-9232,32767,-1,0,0,32767,0,-31440,-9232,-21458,-24764,-4664,32433,-31440,9231,13611,29805,-31440,9231,-4664,32433,-21458,-24764,-31440,-9232,32767,-1,0,0,32767,0,-31440,-9232,-21458,-24764,-4664,32433,-31440,9231,13611,29805,-31440,9231,-4664,32433,-21458,-24764,-31440,-9232,32767,-1,0,0,32767,0,-31440,-9232,-21458,-24764,-4664,32433,-31440,9231,13611,29805,-31440,9231,-4664,32433,-21458,-24764,-31440,-9232,32767,-1,0,0,-32767,0,31439,9231,21457,24763,4663,-32434,31439,-9232,-13612,-29806,31439,-9232,4663,-32434,21457,24763,31439,9231,-32767,0,0,0,-32767,0,31439,9231,21457,24763,4663,-32434,31439,-9232,-13612,-29806,31439,-9232,4663,-32434,21457,24763,31439,9231,-32767,0,0,0,32767,0,-31440,-9232,-21458,-24764,-4664,32433,-31440,9231,13611,29805,-31440,9231,-4664,32433,-21458,-24764,-31440,-9232,32767,-1,0,0,32767,0,-31440,-9232,-21458,-24764,-4664,32433,-31440,9231,13611,29805,-31440,9231,-4664,32433,-21458,-24764,-31440,-9232,32767,-1,0,0,32767,0,-31440,-9232,-21458,-24764,-4664,32433,-31440,9231,13611,29805,-31440,9231,-4664,32433,-21458,-24764,-31440,-9232,32767,-1,0,0,-32767,0,31439,9231,21457,24763,4663,-32434,31439,-9232,-13612,-29806,31439,-9232,4663,-32434,21457,24763,31439,9231,-32767,0,0,0,32767,0,-31440,-9232,-21458,-24764,-4664,32433,-31440,9231,13611,29805,-31440,9231,-4664,32433,-21458,-24764,-31440,-9232,32767,-1,0,0};

openair1/PHY/LTE_TRANSPORT/npss_NB_IoT.c

+/***********************************************************************
+
+**********************************************************************/
+/*! \file PHY/LTE_TRANSPORT/npss_NB_IoT.c
+* \Generation of Narrowband Primary Synchronisation Signal(NPSS) for NB-IoT,	 TS 36-212, V13.4.0 2017-02
+* \author M. KANJ
+* \date 2017
+* \version 0.0
+* \company bcom
+* \email: matthieu.kanj@b-com.com
+* \note
+* \warning
+*/
+
+#include "PHY/defs.h"
+#include "PHY/extern.h"
+
+int generate_npss_NB_IoT(int32_t **txdataF,
+						short amp,
+						LTE_DL_FRAME_PARMS *frame_parms,
+						unsigned short symbol_offset,				// symbol_offset should equal to 3 for NB-IoT 
+						unsigned short slot_offset,
+						unsigned short RB_IoT_ID)					// new attribute (values are between 0.. Max_RB_number-1), it does not exist for LTE
+{
+   unsigned short c,aa,a,s;
+   unsigned short slot_id;
+   short *primary_sync;
+   unsigned short NB_IoT_start; 			// Index of the first RE in the RB dedicated for NB-IoT
+   unsigned short bandwidth_even_odd;
+
+   slot_id = slot_offset;  							// The id(0..19) of the slot including the NPSS signal // For NB-IoT, slod_id should be 10 (SF5)
+   primary_sync = primary_synch_NB_IoT;     		// primary_synch_NB_IoT[264] of primary_synch_NB_IoT.h
+
+   // Signal amplitude
+   a = (frame_parms->nb_antennas_tx == 1) ? amp: (amp*ONE_OVER_SQRT2_Q15)>>15;
+
+   // Testing if the total number of RBs is even or odd (i.e. Identification of the bandwidth: 1.4, 3, 5, 10, ... MHz)
+   bandwidth_even_odd = frame_parms->N_RB_DL % 2;  		// 0 for even, 1 for odd
+
+   for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
+	
+		if(RB_IoT_ID < (frame_parms->N_RB_DL/2))
+		{
+			NB_IoT_start = frame_parms->ofdm_symbol_size - 12*(frame_parms->N_RB_DL/2) - (bandwidth_even_odd*6) + 12*(RB_IoT_ID%(ceil(frame_parms->N_RB_DL/(float)2)));
+		} else {
+			NB_IoT_start = (bandwidth_even_odd*6) + 12*(RB_IoT_ID%(ceil(frame_parms->N_RB_DL/(float)2)));
+		}
+		// For the In-band or Stand-alone case the REs of NPSS signal have the same positions
+		for (s=0; s<11; s++ )   				// loop on OFDM symbols
+		{	
+			for (c=0; c<12; c++) {   			// loop on NB-IoT carriers
+			
+				((short*)txdataF[aa])[2*( (slot_id*7*frame_parms->ofdm_symbol_size) + ((symbol_offset+s)*frame_parms->ofdm_symbol_size) + NB_IoT_start + c )] =
+			
+										(a * primary_sync[2*c + (2*12*s)]) >> 15;
+										
+				((short*)txdataF[aa])[2*( (slot_id*7*frame_parms->ofdm_symbol_size) + ((symbol_offset+s)*frame_parms->ofdm_symbol_size) + NB_IoT_start + c )+1] =
+			
+										(a * primary_sync[2*c + (2*12*s) + 1]) >> 15;
+			}
+		}
+	}
+
+  return(0);
+}
+
+/* (for LTE)
+int generate_pss_emul(PHY_VARS_eNB *phy_vars_eNb,uint8_t sect_id)
+{
+
+  msg("[PHY] EMUL eNB generate_pss_emul eNB %d, sect_id %d\n",phy_vars_eNb->Mod_id,sect_id);
+  eNB_transport_info[phy_vars_eNb->Mod_id][phy_vars_eNb->CC_id].cntl.pss=sect_id;
+  return(0);
+}
+*/

openair1/PHY/LTE_TRANSPORT/nsss_NB_IoT.c

+/***********************************************************************
+
+**********************************************************************/
+/*! \file PHY/LTE_TRANSPORT/nsss_NB_IoT.c
+* \Generation of Narrowband Secondary Synchronisation Signal(NSSS) for NB-IoT,	 TS 36-212, V13.4.0 2017-02
+* \author M. KANJ
+* \date 2017
+* \version 0.0
+* \company bcom
+* \email: matthieu.kanj@b-com.com
+* \note
+* \warning
+*/
+
+
+#include "PHY/defs.h"
+#include "defs.h"
+#include "PHY/extern.h"
+
+int generate_sss_NB_IoT(int32_t **txdataF,
+						int16_t amp,
+						LTE_DL_FRAME_PARMS *frame_parms, 
+						uint16_t symbol_offset, 				// symbol_offset = 3 for NB-IoT 
+						uint16_t slot_offset, 
+						unsigned short frame_number, 			// new attribute (Get value from higher layer), it does not exist for LTE
+						unsigned short RB_IoT_ID)				// new attribute (values are between 0.. Max_RB_number-1), it does not exist for LTE
+{
+	uint8_t aa,Nid_NB_IoT,Nid2,f,q,s,c,u;
+	int16_t *d;
+	uint8_t Nid2;
+	uint16_t n_f;
+	unsigned short a;
+	uint16_t slot_id;  						// slot_id = 17 in NB_IoT
+	unsigned short bandwidth_even_odd;
+	unsigned short NB_IoT_start;
+  
+	n_f = frame_number;
+	Nid_NB_IoT = frame_parms->Nid_cell;     // supposing Cell_Id of LTE = Cell_Id of NB-IoT  // if different , NB_IOT_DL_FRAME_PARMS should be includes as attribute
+  
+	f = (n_f/2) % 4;   						// f = 0, 1, 2, 3
+	q = Nid_NB_IoT/126; 					// q = 0, 1, 2, 3
+	u = (Nid_NB_IoT % 126); 
+  
+	Nid2 = q*4 + f; 						// Nid2 = 0..15
+  
+	switch (Nid2) {
+	case 0:
+		d = d0f0;
+		break;
+	case 1:
+		d = d0f1;
+		break;
+	case 2:
+		d = d0f2;
+		break;
+	case 3:
+		d = d0f3;
+		break;
+	case 4:
+		d = d1f0;
+		break;
+	case 5:
+		d = d1f1;
+		break;
+	case 6:
+		d = d1f2;
+		break;
+	case 7:
+		d = d1f3;
+		break;
+	case 8:
+		d = d2f0;
+		break;
+	case 9:
+		d = d2f1;
+		break;
+	case 10:
+		d = d2f2;
+		break;
+	case 11:
+		d = d2f3;
+	case 12:
+		d = d3f0;
+		break;
+	case 13:
+		d = d3f1;
+		break;
+	case 14:
+		d = d3f2;
+		break;
+	case 15:
+		d = d3f3;
+		break;
+
+	default:
+		msg("[NSSS] ERROR\n");
+		return(-1);
+	}
+
+	slot_id = slot_offset;
+   
+	//  Signal amplitude
+	a = (frame_parms->nb_antennas_tx == 1) ? amp: (amp*ONE_OVER_SQRT2_Q15)>>15;
+   
+	// Testing if the total number of RBs is even or odd (i.e. Identification of the bandwidth: 1.4, 3, 5, 10, ... MHz)
+	bandwidth_even_odd = frame_parms->N_RB_DL % 2;  		// 0 even, 1 odd
+
+	for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
+
+		if(RB_IoT_ID < (frame_parms->N_RB_DL/2))
+		{
+			NB_IoT_start = frame_parms->ofdm_symbol_size - 12*(frame_parms->N_RB_DL/2) - (bandwidth_even_odd*6) + 12*(RB_IoT_ID%(ceil(frame_parms->N_RB_DL/(float)2)));
+		} else {
+			NB_IoT_start = (bandwidth_even_odd*6) + 12*(RB_IoT_ID%(ceil(frame_parms->N_RB_DL/(float)2)));
+		}
+		// For the In-band or Stand-alone case the REs of NPSS signal have the same positions
+		for (s=0; s<11; s++ ) 								// loop on OFDM symbols
+		{		
+			for (c=0; c<12; c++) {							// loop on NB-IoT carriers
+			
+				((short*)txdataF[aa])[2*( (slot_id*7*frame_parms->ofdm_symbol_size) + ((symbol_offset+s)*frame_parms->ofdm_symbol_size) + NB_IoT_start + c )] =
+			
+										(a * d[(2*u*132) + (2*c) + (2*s*12) ]) >> 15;
+										
+				((short*)txdataF[aa])[2*( (slot_id*7*frame_parms->ofdm_symbol_size) + ((symbol_offset+s)*frame_parms->ofdm_symbol_size) + NB_IoT_start + c )+1] =
+			
+										(a * d[(2*u*132) + (2*c) + (2*s*12) + 1]) >> 15;
+
+			}
+		}
+	}
+  return(0);
+}
+
+