git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5352 818b1a75-f10b-46b9-bf7c-635c3b92a50f
This commit is contained in:
Raymond Knopp
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/*******************************************************************************
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Eurecom OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Contact Information
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Openair Admin: openair_admin@eurecom.fr
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Openair Tech : openair_tech@eurecom.fr
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Forums : http://forums.eurecom.fsr/openairinterface
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Address : Eurecom, 450, route des chappes, 06410 Biot Sophia Antipolis, France
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*******************************************************************************/
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/*! \file PHY/LTE_REFSIG/lte_dl_uespec.c
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* \brief Top-level routines for generating UE-specific Reference signals from 36-211, V11.3.0 2013-06
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* \author R. Knopp
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* \date 2014
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* \version 0.1
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* \company Eurecom
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* \email: knopp@eurecom.fr
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* \note
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* \warning
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*/
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#ifdef USER_MODE
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#include <stdio.h>
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#include <stdlib.h>
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#endif
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#include "defs.h"
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#include "PHY/defs.h"
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#include "log.h"
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//extern unsigned int lte_gold_table[3][20][2][14];
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//#define DEBUG_DL_CELL_SPEC
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int Wbar_NCP[8][4] = {{1,1,1,1},{1,-1,1,-1},{1,1,1,1},{1,-1,1,-1},{1,1,-1,-1},{-1,-1,1,1},{1,-1,-1,1},{-1,1,1,-1}};
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int lte_dl_ue_spec(PHY_VARS_eNB *phy_vars_eNB,
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uint8_t UE_id,
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mod_sym_t *output,
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short amp,
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uint8_t Ns,
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uint8_t p,
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int SS_flag ) {
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mod_sym_t qpsk[4],nqpsk[4],*qpsk_p,*output_p;
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int16_t a;
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int w,lprime,ind,l,ind_dword,ind_qpsk_symb,nPRB;
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// LTE_eNB_DLSCH_t *dlsch = phy_vars_eNB->dlsch_eNB[UE_id][0];
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a = (amp*ONE_OVER_SQRT2_Q15)>>15;
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((short *)&qpsk[0])[0] = a;
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((short *)&qpsk[0])[1] = a;
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((short *)&qpsk[1])[0] = -a;
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((short *)&qpsk[1])[1] = a;
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((short *)&qpsk[2])[0] = a;
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((short *)&qpsk[2])[1] = -a;
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((short *)&qpsk[3])[0] = -a;
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((short *)&qpsk[3])[1] = -a;
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((short *)&nqpsk[0])[0] = -a;
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((short *)&nqpsk[0])[1] = -a;
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((short *)&nqpsk[1])[0] = a;
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((short *)&nqpsk[1])[1] = -a;
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((short *)&nqpsk[2])[0] = -a;
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((short *)&nqpsk[2])[1] = a;
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((short *)&nqpsk[3])[0] = a;
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((short *)&nqpsk[3])[1] = a;
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if (p>=7) {
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if (SS_flag==0) {
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if (phy_vars_eNB->lte_frame_parms.Ncp == NORMAL) {
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// this is 3GPP 36-211 6.10.3.2, NORMAL CP, p>=7
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// position output pointer to 5th symbol in slot
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output_p = output+(60*phy_vars_eNB->lte_frame_parms.N_RB_DL);
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// shift to 2nd RE in PRB for p=7,8,11,13
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if ((p==7) || (p==8) || (p==11) || (p==13)) output_p++;
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for (lprime=0;lprime<2;lprime++) {
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ind = 3*lprime*phy_vars_eNB->lte_frame_parms.N_RB_DL;
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l = lprime + ((Ns&1)<<1);
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// loop over pairs of PRBs, this is the periodicity of the W_bar_NCP sequence
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// unroll the computations for the 6 pilots, select qpsk or nqpsk as function of W_bar_NCP
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for (nPRB=0;nPRB<phy_vars_eNB->lte_frame_parms.N_RB_DL;nPRB+=2) {
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// First pilot
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w = Wbar_NCP[p-7][l];
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qpsk_p = (w==1) ? qpsk : nqpsk;
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ind_dword = ind>>4;
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ind_qpsk_symb = ind&0xf;
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*output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3];
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#ifdef DEBUG_DL_UESPEC
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LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n",
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Ns,l,m,mprime_dword,mprime_qpsk_symb);
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LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3);
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#endif
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output_p+=5;
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ind++;
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w = Wbar_NCP[p-7][3-l];
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qpsk_p = (w==1) ? qpsk : nqpsk;
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// Second pilot
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ind_dword = ind>>4;
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ind_qpsk_symb = ind&0xf;
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*output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3];
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#ifdef DEBUG_DL_UESPEC
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LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n",
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Ns,l,m,mprime_dword,mprime_qpsk_symb);
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LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3);
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#endif
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output_p+=5;
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ind++;
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w = Wbar_NCP[p-7][l];
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qpsk_p = (w==1) ? qpsk : nqpsk;
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// Third pilot
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ind_dword = ind>>4;
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ind_qpsk_symb = ind&0xf;
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*output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3];
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#ifdef DEBUG_DL_UESPEC
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LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n",
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Ns,l,m,mprime_dword,mprime_qpsk_symb);
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LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3);
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#endif
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output_p+=2;
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ind++;
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// Fourth pilot
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w = Wbar_NCP[p-7][3-l];
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qpsk_p = (w==1) ? qpsk : nqpsk;
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ind_dword = ind>>4;
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ind_qpsk_symb = ind&0xf;
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*output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3];
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#ifdef DEBUG_DL_UESPEC
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LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n",
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Ns,l,m,mprime_dword,mprime_qpsk_symb);
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LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3);
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#endif
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output_p+=5;
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ind++;
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w = Wbar_NCP[p-7][l];
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qpsk_p = (w==1) ? qpsk : nqpsk;
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// Fifth pilot
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ind_dword = ind>>4;
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ind_qpsk_symb = ind&0xf;
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*output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3];
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#ifdef DEBUG_DL_UESPEC
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LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n",
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Ns,l,m,mprime_dword,mprime_qpsk_symb);
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LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3);
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#endif
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output_p+=5;
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ind++;
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w = Wbar_NCP[p-7][3-l];
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qpsk_p = (w==1) ? qpsk : nqpsk;
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// Sixth pilot
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ind_dword = ind>>4;
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ind_qpsk_symb = ind&0xf;
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*output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3];
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#ifdef DEBUG_DL_UESPEC
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LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n",
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Ns,l,m,mprime_dword,mprime_qpsk_symb);
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LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3);
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#endif
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output_p+=2;
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ind++;
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}
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}
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}
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else {
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LOG_E(PHY,"Special subframe not supported for UE specific pilots yet\n");
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}
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}
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}
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else if (p==5) {
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LOG_E(PHY,"p=5 not supported for UE specific pilots yet\n");
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}
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else {
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LOG_E(PHY,"Illegal p %d UE specific pilots\n",p);
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}
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return(0);
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}
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/*
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int lte_dl_cell_spec_rx(PHY_VARS_UE *phy_vars_ue,
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uint8_t eNB_offset,
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int *output,
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unsigned char Ns,
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unsigned char l,
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unsigned char p) {
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unsigned char mprime,mprime_dword,mprime_qpsk_symb,m;
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unsigned short k=0;
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unsigned int qpsk[4];
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short pamp;
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// Compute the correct pilot amplitude, sqrt_rho_b = Q3.13
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pamp = ONE_OVER_SQRT2_Q15;
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// This includes complex conjugate for channel estimation
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((short *)&qpsk[0])[0] = pamp;
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((short *)&qpsk[0])[1] = -pamp;
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((short *)&qpsk[1])[0] = -pamp;
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((short *)&qpsk[1])[1] = -pamp;
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((short *)&qpsk[2])[0] = pamp;
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((short *)&qpsk[2])[1] = pamp;
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((short *)&qpsk[3])[0] = -pamp;
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((short *)&qpsk[3])[1] = pamp;
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mprime = 110 - phy_vars_ue->lte_frame_parms.N_RB_DL;
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for (m=0;m<phy_vars_ue->lte_frame_parms.N_RB_DL<<1;m++) {
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mprime_dword = mprime>>4;
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mprime_qpsk_symb = mprime&0xf;
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// this is r_mprime from 3GPP 36-211 6.10.1.2
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output[k] = qpsk[(phy_vars_ue->lte_gold_table[eNB_offset][Ns][l][mprime_dword]>>(2*mprime_qpsk_symb))&3];
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#ifdef DEBUG_DL_CELL_SPEC
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printf("Ns %d, l %d, m %d,mprime_dword %d, mprime_qpsk_symbol %d\n",
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Ns,l,m,mprime_dword,mprime_qpsk_symb);
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printf("index = %d (k %d)\n",(phy_vars_ue->lte_gold_table[eNB_offset][Ns][l][mprime_dword]>>(2*mprime_qpsk_symb))&3,k);
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#endif
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mprime++;
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#ifdef DEBUG_DL_CELL_SPEC
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if (m<4)
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printf("Ns %d l %d output[%d] = (%d,%d)\n",Ns,l,k,((short *)&output[k])[0],((short *)&output[k])[1]);
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#endif
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k++;
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}
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return(0);
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}
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*/
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#ifdef LTE_DL_CELL_SPEC_MAIN
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//extern int write_output(const char *,const char *,void *,int,int,char);
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// flag change eren
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extern int write_output(const char *,const char *,void *,int,int,char);
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main() {
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unsigned short Nid_cell=0;
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unsigned int Ncp = 0;
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int output00[1024];
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int output01[1024];
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int output10[1024];
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int output11[1024];
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memset(output00,0,1024*sizeof(int));
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memset(output01,0,1024*sizeof(int));
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memset(output10,0,1024*sizeof(int));
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memset(output11,0,1024*sizeof(int));
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lte_gold(Nid_cell,Ncp);
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lte_dl_cell_spec(output00,
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ONE_OVER_SQRT2_Q15,
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50,
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Nid_cell,
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Ncp,
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0,
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0,
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0,
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0);
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lte_dl_cell_spec(output10,
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ONE_OVER_SQRT2_Q15,
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50,
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Nid_cell,
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Ncp,
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0,
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1,
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0,
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0);
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lte_dl_cell_spec(output01,
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ONE_OVER_SQRT2_Q15,
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50,
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Nid_cell,
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Ncp,
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0,
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0,
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1,
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0);
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lte_dl_cell_spec(output11,
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ONE_OVER_SQRT2_Q15,
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50,
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Nid_cell,
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Ncp,
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0,
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1,
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1,
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0);
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write_output("dl_cell_spec00.m","dl_cs00",output00,1024,1,1);
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write_output("dl_cell_spec01.m","dl_cs01",output01,1024,1,1);
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write_output("dl_cell_spec10.m","dl_cs10",output10,1024,1,1);
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write_output("dl_cell_spec11.m","dl_cs11",output11,1024,1,1);
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}
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#endif
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