Lionel Gauthier
56c9000558
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7117 818b1a75-f10b-46b9-bf7c-635c3b92a50f
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenAirInterface is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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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 "openair0_lib.h"
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#include "gain_control.h"
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//#define DEBUG_PHY
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#ifdef DEBUG_PHY
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#include "UTIL/LOG/log_extern.h"
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#endif
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void gain_control_all (unsigned int rx_power_fil_dB, unsigned int card) {
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unsigned int ant;
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for (ant=0; ant<4; ant++)
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gain_control (rx_power_fil_dB,ant,card);
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}
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void gain_control (unsigned int rx_power_fil_dB, unsigned int ant, unsigned int card) {
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exmimo_config_t *p_exmimo_config = openair0_exmimo_pci[card].exmimo_config_ptr;
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unsigned int rf_mode, rx_gain, LNA;
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rx_gain = p_exmimo_config->rf.rx_gain[ant][0];
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rf_mode = p_exmimo_config->rf.rf_mode[ant];
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LNA = rf_mode & LNAGAINMASK;
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// Gain control with hysterisis
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if (rx_power_fil_dB < TARGET_RX_POWER_MIN) { //increase gain
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switch (LNA) {
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case LNAByp:
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p_exmimo_config->rf.rf_mode[ant] = (rf_mode & (~LNAGAINMASK)) | LNAMed;
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break;
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case LNAMed:
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p_exmimo_config->rf.rf_mode[ant] = (rf_mode & (~LNAGAINMASK)) | LNAMax;
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break;
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case LNAMax:
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p_exmimo_config->rf.rx_gain[ant][0] = min(30,rx_gain+5);
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break;
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default:
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break;
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}
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} else if (rx_power_fil_dB > TARGET_RX_POWER_MAX) { //decrease gain
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if (rx_gain==0) {
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switch (LNA) {
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case LNAMax:
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p_exmimo_config->rf.rf_mode[ant] = (rf_mode & (~LNAGAINMASK)) | LNAMed;
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break;
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case LNAMed:
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p_exmimo_config->rf.rf_mode[ant] = (rf_mode & (~LNAGAINMASK)) | LNAByp;
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break;
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case LNAByp:
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break;
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default:
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break;
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}
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} else {
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p_exmimo_config->rf.rx_gain[ant][0] = max(0,(int)rx_gain-5);
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}
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}
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#ifdef DEBUG_PHY
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LOG_D(PHY,"AGC for chain %d: rx_power_fil_dB=%d, rx_gain=%d, LNA=%d (1=Byp,2=Med,3=Max)\n",ant,rx_power_fil_dB,p_exmimo_config->rf.rx_gain[ant][0],(p_exmimo_config->rf.rf_mode[ant]&LNAGAINMASK)>>14);
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#endif //DEBUG_PHY
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}
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