/*******************************************************************************

  Eurecom OpenAirInterface
  Copyright(c) 1999 - 2011 Eurecom

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information
  Openair Admin: openair_admin@eurecom.fr
  Openair Tech : openair_tech@eurecom.fr
  Forums       : http://forums.eurecom.fsr/openairinterface
  Address      : Eurecom, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France

******************************************************************************/

/*! \file PHY/LTE_TRANSPORT/initial_sync.c
* \brief Routines for initial UE synchronization procedure (PSS,SSS,PBCH and frame format detection)
* \author R. Knopp, F. Kaltenberger
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr,kaltenberger@eurecom.fr
* \note
* \warning
*/
#include "PHY/types.h"
#include "PHY/defs.h"
#include "PHY/extern.h"
#include "SCHED/defs.h"
#include "SCHED/extern.h"
#include "defs.h"
#include "extern.h"
#ifdef EXMIMO
#include "gain_control.h"
#endif

//#define DEBUG_INITIAL_SYNCH

int pbch_detection(PHY_VARS_UE *phy_vars_ue, runmode_t mode) {

  uint8_t l,pbch_decoded,frame_mod4,pbch_tx_ant,dummy;
  LTE_DL_FRAME_PARMS *frame_parms=&phy_vars_ue->lte_frame_parms;
  char phich_resource[6];

#ifdef DEBUG_INITIAL_SYNCH
  LOG_I(PHY,"[UE%d] Initial sync: starting PBCH detection (rx_offset %d)\n",phy_vars_ue->Mod_id,
      phy_vars_ue->rx_offset);
#endif

  for (l=0;l<frame_parms->symbols_per_tti/2;l++) {
    
    slot_fep(phy_vars_ue,
	     l,
	     1,
	     phy_vars_ue->rx_offset,
	     0);
  }

  slot_fep(phy_vars_ue,
	   0,
	   2,
	   phy_vars_ue->rx_offset,
	   0);

  lte_ue_measurements(phy_vars_ue,
		      phy_vars_ue->rx_offset,
		      0,
		      0);

#ifdef DEBUG_INITIAL_SYNCH
  LOG_I(PHY,"[UE %d][initial sync] RX RSSI %d dBm, digital (%d, %d) dB, linear (%d, %d), avg rx power %d dB (%d lin), RX gain %d dB\n",
	phy_vars_ue->Mod_id,
	phy_vars_ue->PHY_measurements.rx_rssi_dBm[0] - ((phy_vars_ue->lte_frame_parms.nb_antennas_rx==2) ? 3 : 0), 
	phy_vars_ue->PHY_measurements.rx_power_dB[0][0],
	phy_vars_ue->PHY_measurements.rx_power_dB[0][1],
	phy_vars_ue->PHY_measurements.rx_power[0][0],
	phy_vars_ue->PHY_measurements.rx_power[0][1],		  
	phy_vars_ue->PHY_measurements.rx_power_avg_dB[0],
	phy_vars_ue->PHY_measurements.rx_power_avg[0],
	phy_vars_ue->rx_total_gain_dB);
  
  LOG_I(PHY,"[UE %d][initial sync] N0 %d dBm digital (%d, %d) dB, linear (%d, %d), avg noise power %d dB (%d lin)\n",
	phy_vars_ue->Mod_id,
	phy_vars_ue->PHY_measurements.n0_power_tot_dBm,
	phy_vars_ue->PHY_measurements.n0_power_dB[0],
	phy_vars_ue->PHY_measurements.n0_power_dB[1],
	phy_vars_ue->PHY_measurements.n0_power[0],
	phy_vars_ue->PHY_measurements.n0_power[1],
	phy_vars_ue->PHY_measurements.n0_power_avg_dB,
	phy_vars_ue->PHY_measurements.n0_power_avg);
#endif
  
  pbch_decoded = 0;
  for (frame_mod4=0;frame_mod4<4;frame_mod4++) {
    pbch_tx_ant = rx_pbch(&phy_vars_ue->lte_ue_common_vars,
			  phy_vars_ue->lte_ue_pbch_vars[0],
			  frame_parms,
			  0,
			  SISO,
			  frame_mod4);
    if ((pbch_tx_ant>0) && (pbch_tx_ant<=2)) {
      pbch_decoded = 1;
      break;
    }
    
    pbch_tx_ant = rx_pbch(&phy_vars_ue->lte_ue_common_vars,
			  phy_vars_ue->lte_ue_pbch_vars[0],
			  frame_parms,
			  0,
			  ALAMOUTI,
			  frame_mod4);
    if ((pbch_tx_ant>0) && (pbch_tx_ant<=2)) {
      pbch_decoded = 1;
      break;
    }
  }
  
  
  if (pbch_decoded) {
    
    frame_parms->nb_antennas_tx_eNB = pbch_tx_ant;
    
    // set initial transmission mode to 1 or 2 depending on number of detected TX antennas
    frame_parms->mode1_flag = (pbch_tx_ant==1);
    // openair_daq_vars.dlsch_transmission_mode = (pbch_tx_ant>1) ? 2 : 1;
    

    // flip byte endian on 24-bits for MIB
    //    dummy = phy_vars_ue->lte_ue_pbch_vars[0]->decoded_output[0];
    //    phy_vars_ue->lte_ue_pbch_vars[0]->decoded_output[0] = phy_vars_ue->lte_ue_pbch_vars[0]->decoded_output[2];
    //    phy_vars_ue->lte_ue_pbch_vars[0]->decoded_output[2] = dummy;

    // now check for Bandwidth of Cell
    dummy = (phy_vars_ue->lte_ue_pbch_vars[0]->decoded_output[2]>>5)&7;
    switch (dummy) {
      
    case 0 : 
      frame_parms->N_RB_DL = 6;
      break;
    case 1 : 
      frame_parms->N_RB_DL = 15;
      break;
    case 2 : 
      frame_parms->N_RB_DL = 25;
      break;
    case 3 : 
      frame_parms->N_RB_DL = 50;
      break;
    case 4 : 
      frame_parms->N_RB_DL = 75;
      break;
    case 5:
      frame_parms->N_RB_DL = 100;
      break;
    default:
        LOG_E(PHY,"[UE%d] Initial sync: PBCH decoding: Unknown N_RB_DL\n",phy_vars_ue->Mod_id);
      return -1;
      break;
    }
#ifndef USER_MODE
    if (frame_parms->N_RB_DL != 25) {
        LOG_E(PHY,"[UE%d] Initial sync: PBCH decoding: Detected NB_RB %d, but CBMIMO1 can only handle NB_RB=25\n",phy_vars_ue->Mod_id,frame_parms->N_RB_DL);
      return -1;
    }
#endif
    
    // now check for PHICH parameters
    frame_parms->phich_config_common.phich_duration = (PHICH_DURATION_t)((phy_vars_ue->lte_ue_pbch_vars[0]->decoded_output[2]>>4)&1);
    dummy = (phy_vars_ue->lte_ue_pbch_vars[0]->decoded_output[2]>>2)&3;
    switch (dummy) {
    case 0:
      frame_parms->phich_config_common.phich_resource = oneSixth;
      sprintf(phich_resource,"1/6");
      break;
    case 1:
      frame_parms->phich_config_common.phich_resource = half;
      sprintf(phich_resource,"1/2");
      break;
    case 2:
      frame_parms->phich_config_common.phich_resource = one;
      sprintf(phich_resource,"1");
      break;
    case 3:
      frame_parms->phich_config_common.phich_resource = two;
      sprintf(phich_resource,"2");
      break;
    default:
        LOG_E(PHY,"[UE%d] Initial sync: Unknown PHICH_DURATION\n",phy_vars_ue->Mod_id);
      return -1;
      break;
    }
    
    phy_vars_ue->frame = 	(((phy_vars_ue->lte_ue_pbch_vars[0]->decoded_output[2]&3)<<6) + (phy_vars_ue->lte_ue_pbch_vars[0]->decoded_output[1]>>2))<<2;
    phy_vars_ue->frame += frame_mod4;

#ifndef USER_MODE
    // one frame delay
    phy_vars_ue->frame ++;
#endif

#ifdef DEBUG_INITIAL_SYNCH
    LOG_I(PHY,"[UE%d] Initial sync: pbch decoded sucessfully mode1_flag %d, tx_ant %d, frame %d, N_RB_DL %d, phich_duration %d, phich_resource %s!\n",
	  phy_vars_ue->Mod_id,
	  frame_parms->mode1_flag,
	  pbch_tx_ant,
	  phy_vars_ue->frame,
	  frame_parms->N_RB_DL,
	  frame_parms->phich_config_common.phich_duration,
	  phich_resource);  //frame_parms->phich_config_common.phich_resource);
#endif
    return(0);
  }
  else {
    return(-1);
  }
  
}

int initial_sync(PHY_VARS_UE *phy_vars_ue, runmode_t mode) {
 
  uint32_t sync_pos,sync_pos2,sync_pos_slot;
  int32_t metric_fdd_ncp=0,metric_fdd_ecp=0,metric_tdd_ncp=0,metric_tdd_ecp=0;
  uint8_t phase_fdd_ncp,phase_fdd_ecp,phase_tdd_ncp,phase_tdd_ecp;
  uint8_t flip_fdd_ncp,flip_fdd_ecp,flip_tdd_ncp,flip_tdd_ecp;
  //  uint16_t Nid_cell_fdd_ncp=0,Nid_cell_fdd_ecp=0,Nid_cell_tdd_ncp=0,Nid_cell_tdd_ecp=0;
  LTE_DL_FRAME_PARMS *frame_parms = &phy_vars_ue->lte_frame_parms;
  //  uint8_t i;
  int ret=-1;
  int aarx,rx_power=0;

  //  LOG_I(PHY,"**************************************************************\n");
  // First try FDD normal prefix
  frame_parms->Ncp=0;
  frame_parms->frame_type=0;
  init_frame_parms(frame_parms,1);

  sync_pos = lte_sync_time(phy_vars_ue->lte_ue_common_vars.rxdata, 
			   frame_parms,
			   (int *)&phy_vars_ue->lte_ue_common_vars.eNb_id);

  if (sync_pos >= frame_parms->nb_prefix_samples)
    sync_pos2 = sync_pos - frame_parms->nb_prefix_samples;
  else
    sync_pos2 = sync_pos + FRAME_LENGTH_COMPLEX_SAMPLES - frame_parms->nb_prefix_samples;

#ifdef DEBUG_INITIAL_SYNCH
  LOG_I(PHY,"[UE%d] Initial sync : Estimated PSS position %d, Nid2 %d\n",phy_vars_ue->Mod_id,sync_pos,phy_vars_ue->lte_ue_common_vars.eNb_id);
#endif


  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) 
    rx_power += signal_energy(&phy_vars_ue->lte_ue_common_vars.rxdata[aarx][sync_pos2],
			      frame_parms->ofdm_symbol_size+frame_parms->nb_prefix_samples);
  phy_vars_ue->PHY_measurements.rx_power_avg_dB[0] = dB_fixed(rx_power/frame_parms->nb_antennas_rx);

#ifdef DEBUG_INITIAL_SYNCH
  LOG_I(PHY,"[UE%d] Initial sync : Estimated power: %d dB\n",phy_vars_ue->Mod_id,phy_vars_ue->PHY_measurements.rx_power_avg_dB[0] );
#endif
  
#ifdef EXMIMO
  if ((openair_daq_vars.rx_gain_mode == DAQ_AGC_ON) &&
      (mode != rx_calib_ue) && (mode != rx_calib_ue_med) && (mode != rx_calib_ue_byp) )
    //phy_adjust_gain(phy_vars_ue,0);
    gain_control_all(phy_vars_ue->PHY_measurements.rx_power_avg_dB[0],0);
#endif

  // SSS detection
 
  // PSS is hypothesized in last symbol of first slot in Frame
  sync_pos_slot = (frame_parms->samples_per_tti>>1) - frame_parms->ofdm_symbol_size - frame_parms->nb_prefix_samples;

  if (sync_pos2 >= sync_pos_slot)
    phy_vars_ue->rx_offset = sync_pos2 - sync_pos_slot;  
  else
    phy_vars_ue->rx_offset = FRAME_LENGTH_COMPLEX_SAMPLES + sync_pos2 - sync_pos_slot;

  if (((sync_pos2 - sync_pos_slot) >=0 ) && 
      ((sync_pos2 - sync_pos_slot) < ((FRAME_LENGTH_COMPLEX_SAMPLES-frame_parms->samples_per_tti/2)))) {
#ifdef DEBUG_INITIAL_SYNCH    
    LOG_I(PHY,"Calling sss detection (FDD normal CP)\n");
#endif
    rx_sss(phy_vars_ue,&metric_fdd_ncp,&flip_fdd_ncp,&phase_fdd_ncp);
    frame_parms->nushift  = frame_parms->Nid_cell%6;
    if (flip_fdd_ncp==1)
      phy_vars_ue->rx_offset += (FRAME_LENGTH_COMPLEX_SAMPLES>>1);
    init_frame_parms(&phy_vars_ue->lte_frame_parms,1);
    lte_gold(frame_parms,phy_vars_ue->lte_gold_table[0],frame_parms->Nid_cell);    
    ret = pbch_detection(phy_vars_ue,mode);

#ifdef DEBUG_INITIAL_SYNCH
    LOG_I(PHY,"FDD Normal prefix: CellId %d metric %d, phase %d, flip %d, pbch %d\n",
	  frame_parms->Nid_cell,metric_fdd_ncp,phase_fdd_ncp,flip_fdd_ncp,ret);
#endif 
  }
  else {
#ifdef DEBUG_INITIAL_SYNCH
      LOG_I(PHY,"FDD Normal prefix: SSS error condition: sync_pos %d, sync_pos_slot %d\n", sync_pos, sync_pos_slot);
#endif
  }


  if (ret==-1) {

    // Now FDD extended prefix
    frame_parms->Ncp=1;
    frame_parms->frame_type=0;
    init_frame_parms(frame_parms,1);
    if (sync_pos < frame_parms->nb_prefix_samples)
      sync_pos2 = sync_pos + FRAME_LENGTH_COMPLEX_SAMPLES - frame_parms->nb_prefix_samples;
    else
      sync_pos2 = sync_pos - frame_parms->nb_prefix_samples;
    // PSS is hypothesized in last symbol of first slot in Frame
    sync_pos_slot = (frame_parms->samples_per_tti>>1) - frame_parms->ofdm_symbol_size - (frame_parms->nb_prefix_samples);
    
    if (sync_pos2 >= sync_pos_slot)
      phy_vars_ue->rx_offset = sync_pos2 - sync_pos_slot;  
    else
      phy_vars_ue->rx_offset = FRAME_LENGTH_COMPLEX_SAMPLES + sync_pos2 - sync_pos_slot;

    //msg("nb_prefix_samples %d, rx_offset %d\n",frame_parms->nb_prefix_samples,phy_vars_ue->rx_offset);

    if (((sync_pos2 - sync_pos_slot) >=0 ) && 
      ((sync_pos2 - sync_pos_slot) < ((FRAME_LENGTH_COMPLEX_SAMPLES-frame_parms->samples_per_tti/2)))) {
      
      rx_sss(phy_vars_ue,&metric_fdd_ecp,&flip_fdd_ecp,&phase_fdd_ecp);
      frame_parms->nushift  = frame_parms->Nid_cell%6;
      if (flip_fdd_ecp==1)
	phy_vars_ue->rx_offset += (FRAME_LENGTH_COMPLEX_SAMPLES>>1);
      init_frame_parms(&phy_vars_ue->lte_frame_parms,1);
      lte_gold(frame_parms,phy_vars_ue->lte_gold_table[0],frame_parms->Nid_cell);    
      ret = pbch_detection(phy_vars_ue,mode);
      
#ifdef DEBUG_INITIAL_SYNCH
      LOG_I(PHY,"FDD Extended prefix: CellId %d metric %d, phase %d, flip %d, pbch %d\n",
	  frame_parms->Nid_cell,metric_fdd_ecp,phase_fdd_ecp,flip_fdd_ecp,ret);
#endif
    }
    else {
#ifdef DEBUG_INITIAL_SYNCH
        LOG_I(PHY,"FDD Extended prefix: SSS error condition: sync_pos %d, sync_pos_slot %d\n", sync_pos, sync_pos_slot);
#endif
    }

    if (ret==-1) {
      // Now TDD normal prefix
      frame_parms->Ncp=0;
      frame_parms->frame_type=1;
      init_frame_parms(frame_parms,1);

      if (sync_pos >= frame_parms->nb_prefix_samples)
	sync_pos2 = sync_pos - frame_parms->nb_prefix_samples;
      else
	sync_pos2 = sync_pos + FRAME_LENGTH_COMPLEX_SAMPLES - frame_parms->nb_prefix_samples;

      // PSS is hypothesized in 2nd symbol of third slot in Frame (S-subframe)
      sync_pos_slot = frame_parms->samples_per_tti + 
	(frame_parms->ofdm_symbol_size<<1) + 
	frame_parms->nb_prefix_samples0 + 
      	(frame_parms->nb_prefix_samples);
      
      if (sync_pos2 >= sync_pos_slot)
	phy_vars_ue->rx_offset = sync_pos2 - sync_pos_slot;  
      else
	phy_vars_ue->rx_offset = (FRAME_LENGTH_COMPLEX_SAMPLES>>1) + sync_pos2 - sync_pos_slot;
      
      /*if (((sync_pos2 - sync_pos_slot) >=0 ) && 
	((sync_pos2 - sync_pos_slot) < ((FRAME_LENGTH_COMPLEX_SAMPLES-frame_parms->samples_per_tti/2)))) {*/
	
	
	rx_sss(phy_vars_ue,&metric_tdd_ncp,&flip_tdd_ncp,&phase_tdd_ncp);
	if (flip_tdd_ncp==1)
	  phy_vars_ue->rx_offset += (FRAME_LENGTH_COMPLEX_SAMPLES>>1);
	frame_parms->nushift  = frame_parms->Nid_cell%6;
	init_frame_parms(&phy_vars_ue->lte_frame_parms,1);

	lte_gold(frame_parms,phy_vars_ue->lte_gold_table[0],frame_parms->Nid_cell);    
	ret = pbch_detection(phy_vars_ue,mode);
	

#ifdef DEBUG_INITIAL_SYNCH
	LOG_I(PHY,"TDD Normal prefix: CellId %d metric %d, phase %d, flip %d, pbch %d\n",
	    frame_parms->Nid_cell,metric_tdd_ncp,phase_tdd_ncp,flip_tdd_ncp,ret);
#endif
	/*}
      else {
#ifdef DEBUG_INITIAL_SYNCH
          LOG_I(PHY,"TDD Normal prefix: SSS error condition: sync_pos %d, sync_pos_slot %d\n", sync_pos, sync_pos_slot);
#endif
}*/
   

      if (ret==-1) {
	// Now TDD extended prefix
	frame_parms->Ncp=1;
	frame_parms->frame_type=1;
	init_frame_parms(frame_parms,1);
	sync_pos2 = sync_pos - frame_parms->nb_prefix_samples;
	if (sync_pos >= frame_parms->nb_prefix_samples)
	  sync_pos2 = sync_pos - frame_parms->nb_prefix_samples;
	else
	  sync_pos2 = sync_pos + FRAME_LENGTH_COMPLEX_SAMPLES - frame_parms->nb_prefix_samples;

	// PSS is hypothesized in 2nd symbol of third slot in Frame (S-subframe)
	sync_pos_slot = frame_parms->samples_per_tti + (frame_parms->ofdm_symbol_size<<1) + (frame_parms->nb_prefix_samples<<1);
	
	if (sync_pos2 >= sync_pos_slot)
	  phy_vars_ue->rx_offset = sync_pos2 - sync_pos_slot;  
	else
	  phy_vars_ue->rx_offset = (FRAME_LENGTH_COMPLEX_SAMPLES>>1) + sync_pos2 - sync_pos_slot;
	
	/*if (((sync_pos2 - sync_pos_slot) >=0 ) && 
	  ((sync_pos2 - sync_pos_slot) < ((FRAME_LENGTH_COMPLEX_SAMPLES-frame_parms->samples_per_tti/2)))) {*/
	  
	  rx_sss(phy_vars_ue,&metric_tdd_ecp,&flip_tdd_ecp,&phase_tdd_ecp);
	  frame_parms->nushift  = frame_parms->Nid_cell%6;
	  if (flip_tdd_ecp==1)
	    phy_vars_ue->rx_offset += (FRAME_LENGTH_COMPLEX_SAMPLES>>1);
	  init_frame_parms(&phy_vars_ue->lte_frame_parms,1);
	  lte_gold(frame_parms,phy_vars_ue->lte_gold_table[0],frame_parms->Nid_cell);    
	  ret = pbch_detection(phy_vars_ue,mode);
	  
#ifdef DEBUG_INITIAL_SYNCH
      LOG_I(PHY,"TDD Extended prefix: CellId %d metric %d, phase %d, flip %d, pbch %d\n",
	  frame_parms->Nid_cell,metric_tdd_ecp,phase_tdd_ecp,flip_tdd_ecp,ret);
#endif
      /*}
	else {
#ifdef DEBUG_INITIAL_SYNCH
        LOG_I(PHY,"TDD Extended prefix: SSS error condition: sync_pos %d, sync_pos_slot %d\n", sync_pos, sync_pos_slot);
#endif
}*/
    
      }
    }
  }
 
  if (ret==0) {  // PBCH found so indicate sync to higher layers and configure frame parameters

#ifdef DEBUG_INITIAL_SYNCH
      LOG_I(PHY,"[PHY][UE%d] In synch, rx_offset %d samples\n",phy_vars_ue->Mod_id, phy_vars_ue->rx_offset);
#endif
#ifdef OPENAIR2
      LOG_I(PHY,"[PHY][UE%d] Sending synch status to higher layers\n",phy_vars_ue->Mod_id);
    //mac_resynch();
	mac_xface->dl_phy_sync_success(phy_vars_ue->Mod_id,phy_vars_ue->frame,0,1);//phy_vars_ue->lte_ue_common_vars.eNb_id);
#endif //OPENAIR2
 
    generate_pcfich_reg_mapping(frame_parms);
    generate_phich_reg_mapping(frame_parms);
    //    init_prach625(frame_parms);
   
    phy_vars_ue->UE_mode[0] = PRACH;
    //phy_vars_ue->lte_ue_pbch_vars[0]->pdu_errors=0;
    phy_vars_ue->lte_ue_pbch_vars[0]->pdu_errors_conseq=0;
    //phy_vars_ue->lte_ue_pbch_vars[0]->pdu_errors_last=0;

  }
  else {
#ifdef DEBUG_INITIAL_SYNC
      LOG_I(PHY,"[UE%d] Initial sync : PBCH not ok\n",phy_vars_ue->Mod_id);
      LOG_I(PHY,"[UE%d] Initial sync : Estimated PSS position %d, Nid2 %d\n",phy_vars_ue->Mod_id,sync_pos,phy_vars_ue->lte_ue_common_vars.eNb_id);
      /*      LOG_I(PHY,"[UE%d] Initial sync: (metric fdd_ncp %d (%d), metric fdd_ecp %d (%d), metric_tdd_ncp %d (%d), metric_tdd_ecp %d (%d))\n", 
            phy_vars_ue->Mod_id, 
            metric_fdd_ncp,Nid_cell_fdd_ncp, 
            metric_fdd_ecp,Nid_cell_fdd_ecp,
            metric_tdd_ncp,Nid_cell_tdd_ncp,
            metric_tdd_ecp,Nid_cell_tdd_ecp);*/
      LOG_I(PHY,"[UE%d] Initial sync : Estimated Nid_cell %d, Frame_type %d\n",phy_vars_ue->Mod_id,
            frame_parms->Nid_cell,frame_parms->frame_type);
#endif
      
      phy_vars_ue->UE_mode[0] = NOT_SYNCHED;
      phy_vars_ue->lte_ue_pbch_vars[0]->pdu_errors_last=phy_vars_ue->lte_ue_pbch_vars[0]->pdu_errors;
      phy_vars_ue->lte_ue_pbch_vars[0]->pdu_errors++;
      phy_vars_ue->lte_ue_pbch_vars[0]->pdu_errors_conseq++;
      
  }

  return ret;
}