diff --git a/openair1/PHY/NR_REFSIG/dmrs_nr.h b/openair1/PHY/NR_REFSIG/dmrs_nr.h
new file mode 100644
index 0000000000000000000000000000000000000000..a695006304762b3eee95e0d644ce2cb5b7d683e0
--- /dev/null
+++ b/openair1/PHY/NR_REFSIG/dmrs_nr.h
@@ -0,0 +1,62 @@
+/*
+ * 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
+ */
+
+/**********************************************************************
+*
+* FILENAME : dmrs.h
+*
+* MODULE : demodulation reference signals
+*
+* DESCRIPTION : generation of dmrs sequences for NR 5G
+* 3GPP TS 38.211
+*
+************************************************************************/
+
+#ifndef DMRS_NR_H
+#define DMRS_NR_H
+
+#include "PHY/defs_nr_UE.h"
+#include "PHY/types.h"
+#include "PHY/NR_REFSIG/ss_pbch_nr.h"
+#include "PHY/NR_REFSIG/pss_nr.h"
+#include "PHY/NR_REFSIG/sss_nr.h"
+
+/************** CODE GENERATION ***********************************/
+
+/************** DEFINE ********************************************/
+
+
+/************* STRUCTURES *****************************************/
+
+
+/************** VARIABLES *****************************************/
+
+/************** FUNCTION ******************************************/
+
+int pseudo_random_sequence(int M_PN, uint32_t *c, uint32_t cinit);
+void lte_gold_new(LTE_DL_FRAME_PARMS *frame_parms, uint32_t lte_gold_table[20][2][14], uint16_t Nid_cell);
+void generate_dmrs_pbch(uint32_t dmrs_pbch_bitmap[DMRS_PBCH_I_SSB][DMRS_PBCH_N_HF][DMRS_BITMAP_SIZE], uint16_t Nid_cell);
+
+#undef EXTERN
+
+#endif /* DMRS_NR_H */
+
+
diff --git a/openair1/PHY/NR_REFSIG/pss_nr.h b/openair1/PHY/NR_REFSIG/pss_nr.h
new file mode 100644
index 0000000000000000000000000000000000000000..c171cf501bdf64257c03df398f023dcacf798f92
--- /dev/null
+++ b/openair1/PHY/NR_REFSIG/pss_nr.h
@@ -0,0 +1,142 @@
+/*
+ * 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
+ */
+
+/**********************************************************************
+*
+* FILENAME : pss_nr.h
+*
+* MODULE : primary synchronisation signal
+*
+* DESCRIPTION : elements related to pss
+*
+************************************************************************/
+
+#ifndef PSS_NR_H
+#define PSS_NR_H
+
+#include "PHY/defs_nr_UE.h"
+#include "PHY/types.h"
+
+#include "PHY/NR_REFSIG/ss_pbch_nr.h"
+
+#ifdef DEFINE_VARIABLES_PSS_NR_H
+#define EXTERN
+#else
+#define EXTERN extern
+#endif
+
+/************** CODE GENERATION ***********************************/
+
+//#define PSS_DECIMATOR /* decimation of sample is done between time correlation */
+
+//#define CIC_DECIMATOR /* it allows enabling decimation based on CIC filter. By default, decimation is based on a FIF filter */
+
+#define TEST_SYNCHRO_TIMING_PSS (1) /* enable time profiling */
+
+//#define DBG_PSS_NR
+
+/************** DEFINE ********************************************/
+
+/* PROFILING */
+#define TIME_PSS (0)
+#define TIME_RATE_CHANGE (TIME_PSS+1)
+#define TIME_SSS (TIME_RATE_CHANGE+1)
+#define TIME_LAST (TIME_SSS+1)
+
+/* PSS configuration */
+
+#define SYNCHRO_FFT_SIZE_MAX (2048) /* maximum size of fft for synchronisation */
+
+#define NO_RATE_CHANGE (1)
+
+#ifdef PSS_DECIMATOR
+ #define RATE_CHANGE (SYNCHRO_FFT_SIZE_MAX/SYNCHRO_FFT_SIZE_PSS)
+ #define SYNCHRO_FFT_SIZE_PSS (256)
+ #define OFDM_SYMBOL_SIZE_PSS (SYNCHRO_FFT_SIZE_PSS)
+ #define SYNCHRO_RATE_CHANGE_FACTOR (SYNCHRO_FFT_SIZE_MAX/SYNCHRO_FFT_SIZE_PSS)
+ #define CIC_FILTER_STAGE_NUMBER (4)
+#else
+ #define RATE_CHANGE (1)
+ #define SYNCHRO_RATE_CHANGE_FACTOR (1)
+#endif
+
+#define SYNC_TMP_SIZE (NB_ANTENNAS_RX*SYNCHRO_FFT_SIZE_MAX*IQ_SIZE) /* to be aligned with existing lte synchro */
+#define SYNCF_TMP_SIZE (SYNCHRO_FFT_SIZE_MAX*IQ_SIZE)
+
+/************* STRUCTURES *****************************************/
+
+
+/************** VARIABLES *****************************************/
+
+//#define STATIC_SYNC_BUFFER
+
+#ifdef STATIC_SYNC_BUFFER
+/* buffer defined in file lte_sync_time */
+EXTERN int16_t synchro_tmp[SYNC_TMP_SIZE] __attribute__((aligned(32)));
+EXTERN int16_t synchroF_tmp[SYNCF_TMP_SIZE] __attribute__((aligned(32)));
+#else
+EXTERN int16_t *synchro_tmp;
+EXTERN int16_t *synchroF_tmp;
+#endif
+
+EXTERN int16_t *primary_synchro_nr[NUMBER_PSS_SEQUENCE]
+#ifdef INIT_VARIABLES_PSS_NR_H
+= { NULL, NULL, NULL}
+#endif
+;
+EXTERN int16_t *primary_synchro_time_nr[NUMBER_PSS_SEQUENCE]
+#ifdef INIT_VARIABLES_PSS_NR_H
+= { NULL, NULL, NULL}
+#endif
+;
+
+EXTERN int *pss_corr_ue[NUMBER_PSS_SEQUENCE]
+#ifdef INIT_VARIABLES_PSS_NR_H
+= { NULL, NULL, NULL}
+#endif
+;
+
+/* profiling structure */
+EXTERN double cpuf;
+time_stats_t generic_time[TIME_LAST];
+
+#ifndef DEFINE_HEADER_ONLY
+
+/************** FUNCTION ******************************************/
+
+void *get_idft(int ofdm_symbol_size);
+void *get_dft(int ofdm_symbol_size);
+void init_context_synchro_nr(NR_DL_FRAME_PARMS *frame_parms_ue);
+void free_context_synchro_nr(void);
+void init_context_pss_nr(NR_DL_FRAME_PARMS *frame_parms_ue);
+void free_context_pss_nr(void);
+int set_pss_nr(int ofdm_symbol_size);
+int pss_synchro_nr(PHY_VARS_NR_UE *PHY_vars_UE, int rate_change);
+int pss_search_time_nr(int **rxdata, ///rx data in time domain
+ NR_DL_FRAME_PARMS *frame_parms,
+ int *eNB_id);
+
+#endif
+#undef EXTERN
+
+#endif /* PSS_NR_H */
+
+
diff --git a/openair1/PHY/NR_REFSIG/ss_pbch_nr.h b/openair1/PHY/NR_REFSIG/ss_pbch_nr.h
new file mode 100644
index 0000000000000000000000000000000000000000..e230d8035b86d49120f0812cd62cb6c0ef2027be
--- /dev/null
+++ b/openair1/PHY/NR_REFSIG/ss_pbch_nr.h
@@ -0,0 +1,81 @@
+/*
+ * 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
+ */
+
+/**********************************************************************
+*
+* FILENAME : ss_pbch_nr.h
+*
+* MODULE : this file contains define only
+*
+* DESCRIPTION : define elements related to SS/PBCH block ie synchronisation (pss/sss) and pbch
+*
+* see TS 38.211 7.4.2 Synchronisation Signals
+* see TS 38.213 4 Synchronisation procedures
+*
+************************************************************************/
+
+#ifndef SS_PBCH_NR_H
+#define SS_PBCH_NR_H
+
+/************** DEFINE ********************************************/
+
+#define VOID_PARAMETER (void) /* avoid a compiler warning for unused parameters of function */
+
+/* PSS parameters */
+#define NUMBER_PSS_SEQUENCE (3)
+#define INVALID_PSS_SEQUENCE (NUMBER_PSS_SEQUENCE)
+#define LENGTH_PSS_NR (127)
+#define N_SC_RB (12) /* Resource block size in frequency domain expressed as a number if subcarriers */
+#define SCALING_PSS_NR (3)
+#define SCALING_CE_PSS_NR (13) /* scaling channel estimation based on ps */
+#define PSS_IFFT_SIZE (256)
+
+#define PSS_SC_START_NR (52) /* see from TS 38.211 table 7.4.3.1-1: Resources within an SS/PBCH block for PSS... */
+
+/* define ofdm symbol offset in the SS/PBCH block of NR synchronisation */
+#define PSS_SYMBOL_NB (0) /* symbol numbers for each element */
+#define PBCH_SYMBOL_NB (1)
+#define SSS_SYMBOL_NB (2)
+#define PBCH_LAST_SYMBOL_NB (3)
+
+/* SS/PBCH parameters */
+#define N_RB_SS_PBCH_BLOCK (20)
+#define NB_SYMBOLS_PBCH (3)
+
+#define IQ_SIZE (sizeof(int16_t) * 2) /* I and Q are alternatively stored into buffers */
+#define N_SYMB_SLOT (14)
+
+/* SS/PBCH parameters : see from TS 38.211 table 7.4.3.1-1: Resources within an SS/PBCH block for PSS... */
+#define DMRS_PBCH_PER_RB (N_SC_RB >> 4) /* at 0+v, 4+v, 8+v for a resource block with v = NcellID modulo 4 */
+#define DMRS_END_FIRST_PART (44)
+#define DMRS_START_SECOND_PART (192)
+#define DMRS_END_SECOND_PART (236)
+#define DMRS_PBCH_NUMBER (NB_SYMBOLS_PBCH*(N_RB_SS_PBCH_BLOCK * DMRS_PBCH_PER_RB)) /* there are both PBCH and SSS/(Set to 0) at the second OFDM symbol of SS/PBCH so size is increased */
+
+/* see TS 38211 7.4.1.4 Demodulation reference signals for PBCH */
+#define DMRS_PBCH_I_SSB (8) /* maximum index value for SSB/PBCH which can have alength of L=4 or L=8 */
+#define DMRS_PBCH_N_HF (2) /* half frame indication - 0 for first part of frame and 1 for second part of frame */
+#define DMRS_ALIGNMENT_32_BIT (20) /* it is just for ensuring a 32 bits alignment for storing dmrs pbch into a 32 bits map */
+#define DMRS_BITMAP_SIZE ((DMRS_PBCH_NUMBER-DMRS_ALIGNMENT_32_BIT)/32) /* size is divided by 32 (to get bitmap on uint32) DMRS_PBCH_NUMBER should be a multiple of 32 */
+
+#endif /* SS_PBCH_NR_H */
+
+
diff --git a/openair1/PHY/NR_REFSIG/sss_nr.h b/openair1/PHY/NR_REFSIG/sss_nr.h
new file mode 100644
index 0000000000000000000000000000000000000000..fb16bb1ca4d430191e6d99983774174af3cfb403
--- /dev/null
+++ b/openair1/PHY/NR_REFSIG/sss_nr.h
@@ -0,0 +1,107 @@
+/*
+ * 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
+ */
+
+/***********************************************************************
+*
+* FILENAME : sss_nr.h
+*
+* MODULE : Secondary synchronisation signal
+*
+* DESCRIPTION : variables related to sss
+*
+************************************************************************/
+
+#ifndef SSS_NR_H
+#define SSS_NR_H
+
+#include "PHY/defs_nr_UE.h"
+#include "PHY/types.h"
+
+#include "pss_nr.h"
+
+#ifdef DEFINE_VARIABLES_SSS_NR_H
+#define EXTERN
+#define INIT_VARIABLES_SSS_NR_H
+#else
+#define EXTERN extern
+#endif
+
+/************** DEFINE ********************************************/
+
+#define INT_MIN (-2147483647 - 1)
+#define SAMPLES_IQ (sizeof(int16_t)*2)
+#define NUMBER_SSS_SEQUENCE (336)
+#define INVALID_SSS_SEQUENCE (NUMBER_SSS_SEQUENCE)
+#define LENGTH_SSS_NR (127)
+#define SCALING_METRIC_SSS_NR (19)
+
+#define N_ID_2_NUMBER (NUMBER_PSS_SEQUENCE)
+#define N_ID_1_NUMBER (NUMBER_SSS_SEQUENCE)
+
+#define GET_NID2(Nid_cell) (Nid_cell%3)
+#define GET_NID1(Nid_cell) (Nid_cell/3)
+
+#define PSS_SC_START_NR (52) /* see from TS 38.211 table 7.4.3.1-1: Resources within an SS/PBCH block for PSS... */
+
+/************** VARIABLES *****************************************/
+
+#define PHASE_HYPOTHESIS_NUMBER (7)
+#define INDEX_NO_PHASE_DIFFERENCE (3) /* this is for no phase shift case */
+
+EXTERN const int16_t phase_re_nr[PHASE_HYPOTHESIS_NUMBER]
+#ifdef INIT_VARIABLES_SSS_NR_H
+= {16383, 25101, 30791, 32767, 30791, 25101, 16383}
+#endif
+;
+
+EXTERN const int16_t phase_im_nr[PHASE_HYPOTHESIS_NUMBER]
+#ifdef INIT_VARIABLES_SSS_NR_H
+= {-28378, -21063, -11208, 0, 11207, 21062, 28377};
+#endif
+;
+
+EXTERN int16_t d_sss[N_ID_2_NUMBER][N_ID_1_NUMBER][LENGTH_SSS_NR];
+
+/************** FUNCTION ******************************************/
+
+void init_context_sss_nr(int amp);
+void free_context_sss_nr(void);
+
+void insert_sss_nr(int16_t *sss_time,
+ NR_DL_FRAME_PARMS *frame_parms);
+
+int pss_ch_est_nr(PHY_VARS_NR_UE *ue,
+ int32_t pss_ext[NB_ANTENNAS_RX][LENGTH_PSS_NR],
+ int32_t sss_ext[NB_ANTENNAS_RX][LENGTH_SSS_NR]);
+
+int _do_pss_sss_extract_nr(PHY_VARS_NR_UE *ue,
+ int32_t pss_ext[NB_ANTENNAS_RX][LENGTH_PSS_NR],
+ int32_t sss_ext[NB_ANTENNAS_RX][LENGTH_SSS_NR],
+ uint8_t doPss, uint8_t doSss,
+ uint8_t subframe);
+
+int rx_sss_nr(PHY_VARS_NR_UE *ue, int32_t *tot_metric, uint8_t *phase_max);
+
+#undef INIT_VARIABLES_SSS_NR_H
+#undef EXTERN
+
+#endif /* SSS_NR_H */
+