adjust_gain.c 6.13 KB
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/*******************************************************************************
    OpenAirInterface 
    Copyright(c) 1999 - 2014 Eurecom

    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.


    OpenAirInterface is distributed in the hope that 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 OpenAirInterface.The full GNU General Public License is 
   included in this distribution in the file called "COPYING". If not, 
   see <http://www.gnu.org/licenses/>.

  Contact Information
  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
  OpenAirInterface Dev  : openair4g-devel@eurecom.fr
  
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  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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 *******************************************************************************/
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#include "PHY/types.h"
#include "PHY/defs.h"
#include "PHY/extern.h"
#include "MAC_INTERFACE/defs.h"
#include "MAC_INTERFACE/extern.h"

#ifdef EXMIMO
#include "openair0_lib.h"
extern int card;
#endif

void
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phy_adjust_gain (PHY_VARS_UE *phy_vars_ue, uint8_t eNB_id) {
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    uint16_t rx_power_fil_dB;
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#ifdef EXMIMO
  exmimo_config_t *p_exmimo_config = openair0_exmimo_pci[card].exmimo_config_ptr;
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  uint16_t i;
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#endif
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  int rssi;
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  rssi = dB_fixed(phy_vars_ue->PHY_measurements.rssi);
  if (rssi>0) rx_power_fil_dB = dB_fixed(phy_vars_ue->PHY_measurements.rssi);
  else rx_power_fil_dB = phy_vars_ue->PHY_measurements.rx_power_avg_dB[eNB_id];
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  // Gain control with hysterisis
  // Adjust gain in phy_vars_ue->rx_vars[0].rx_total_gain_dB

  if (rx_power_fil_dB < TARGET_RX_POWER - 5) //&& (phy_vars_ue->rx_total_gain_dB < MAX_RF_GAIN) )
    phy_vars_ue->rx_total_gain_dB+=5;
  else if (rx_power_fil_dB > TARGET_RX_POWER + 5) //&& (phy_vars_ue->rx_total_gain_dB > MIN_RF_GAIN) )
    phy_vars_ue->rx_total_gain_dB-=5;

  if (phy_vars_ue->rx_total_gain_dB>MAX_RF_GAIN) {
    /*
    if ((openair_daq_vars.rx_rf_mode==0) && (openair_daq_vars.mode == openair_NOT_SYNCHED)) {
      openair_daq_vars.rx_rf_mode=1;
      phy_vars_ue->rx_total_gain_dB = max(MIN_RF_GAIN,MAX_RF_GAIN-25);
    }
    else {
    */
    phy_vars_ue->rx_total_gain_dB = MAX_RF_GAIN;
  }
  else if (phy_vars_ue->rx_total_gain_dB<MIN_RF_GAIN) {
    /*
    if ((openair_daq_vars.rx_rf_mode==1) && (openair_daq_vars.mode == openair_NOT_SYNCHED)) {
      openair_daq_vars.rx_rf_mode=0;
      phy_vars_ue->rx_total_gain_dB = min(MAX_RF_GAIN,MIN_RF_GAIN+25);
    }
    else {
    */
    phy_vars_ue->rx_total_gain_dB = MIN_RF_GAIN;
  }

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  printf("Gain control: rx_total_gain_dB = %d (max %d,rxpf %d)\n",phy_vars_ue->rx_total_gain_dB,MAX_RF_GAIN,rx_power_fil_dB);
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#ifdef EXMIMO

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  if (phy_vars_ue->rx_total_gain_dB>phy_vars_ue->rx_gain_max[0]) {
    phy_vars_ue->rx_total_gain_dB = phy_vars_ue->rx_gain_max[0];
    for (i=0;i<phy_vars_ue->lte_frame_parms.nb_antennas_rx;i++) {
      p_exmimo_config->rf.rx_gain[i][0] = 30;
    }
    
  }
  else if (phy_vars_ue->rx_total_gain_dB<(phy_vars_ue->rx_gain_max[0]-30)) {
    // for the moment we stay in max gain mode
    phy_vars_ue->rx_total_gain_dB = phy_vars_ue->rx_gain_max[0] - 30;
    for (i=0;i<phy_vars_ue->lte_frame_parms.nb_antennas_rx;i++) {
      p_exmimo_config->rf.rx_gain[i][0] = 0;
    }
    /*
      phy_vars_ue->rx_gain_mode[0] = byp;
      phy_vars_ue->rx_gain_mode[1] = byp;
      exmimo_pci_interface->rf.rf_mode0 = 22991; //bypass
      exmimo_pci_interface->rf.rf_mode1 = 22991; //bypass
      
      if (phy_vars_ue->rx_total_gain_dB<(phy_vars_ue->rx_gain_byp[0]-50)) {
      exmimo_pci_interface->rf.rx_gain00 = 0;
      exmimo_pci_interface->rf.rx_gain10 = 0;
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      }
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    */
  }
  else {

    for (i=0;i<phy_vars_ue->lte_frame_parms.nb_antennas_rx;i++) {
      p_exmimo_config->rf.rx_gain[i][0] =  30 - phy_vars_ue->rx_gain_max[0] + phy_vars_ue->rx_total_gain_dB;
    }
  }
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      /*
        break;
      case med_gain:
      case byp_gain:
          if (phy_vars_ue->rx_total_gain_dB>phy_vars_ue->rx_gain_byp[0]) {
              phy_vars_ue->rx_gain_mode[0]   = max_gain;
              phy_vars_ue->rx_gain_mode[1]   = max_gain;
              exmimo_pci_interface->rf.rf_mode0 = 55759; //max gain
              exmimo_pci_interface->rf.rf_mode1 = 55759; //max gain
              
              if (phy_vars_ue->rx_total_gain_dB>phy_vars_ue->rx_gain_max[0]) {
                  exmimo_pci_interface->rf.rx_gain00 = 50;
                  exmimo_pci_interface->rf.rx_gain10 = 50;
              }
              else {
                  exmimo_pci_interface->rf.rx_gain00 = 50 - phy_vars_ue->rx_gain_max[0] + phy_vars_ue->rx_total_gain_dB;
                  exmimo_pci_interface->rf.rx_gain10 = 50 - phy_vars_ue->rx_gain_max[1] + phy_vars_ue->rx_total_gain_dB;
              }
          }
          else if (phy_vars_ue->rx_total_gain_dB<(phy_vars_ue->rx_gain_byp[0]-50)) {
              exmimo_pci_interface->rf.rx_gain00 = 0;
              exmimo_pci_interface->rf.rx_gain10 = 0;
          }
          else {
              exmimo_pci_interface->rf.rx_gain00 = 50 - phy_vars_ue->rx_gain_byp[0] + phy_vars_ue->rx_total_gain_dB;
              exmimo_pci_interface->rf.rx_gain10 = 50 - phy_vars_ue->rx_gain_byp[1] + phy_vars_ue->rx_total_gain_dB;
          }
          break;
      default:
          exmimo_pci_interface->rf.rx_gain00 = 50;
          exmimo_pci_interface->rf.rx_gain10 = 50;
          break;
      }
          */
#endif

#ifdef DEBUG_PHY
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      /*  if ((phy_vars_ue->frame%100==0) || (phy_vars_ue->frame < 10))
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    msg("[PHY][ADJUST_GAIN] frame %d,  rx_power = %d, rx_power_fil = %d, rx_power_fil_dB = %d, coef=%d, ncoef=%d, rx_total_gain_dB = %d (%d,%d,%d)\n",
        phy_vars_ue->frame,rx_power,rx_power_fil,rx_power_fil_dB,coef,ncoef,phy_vars_ue->rx_total_gain_dB,
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	TARGET_RX_POWER,MAX_RF_GAIN,MIN_RF_GAIN);
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      */
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#endif //DEBUG_PHY
	
}