diff --git a/openair1/PHY/LTE_REFSIG/lte_dl_uespec.c b/openair1/PHY/LTE_REFSIG/lte_dl_uespec.c new file mode 100644 index 0000000000..4a9b42af66 --- /dev/null +++ b/openair1/PHY/LTE_REFSIG/lte_dl_uespec.c @@ -0,0 +1,361 @@ +/******************************************************************************* + + Eurecom OpenAirInterface + Copyright(c) 1999 - 2014 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, 450, route des chappes, 06410 Biot Sophia Antipolis, France + +*******************************************************************************/ + +/*! \file PHY/LTE_REFSIG/lte_dl_uespec.c +* \brief Top-level routines for generating UE-specific Reference signals from 36-211, V11.3.0 2013-06 +* \author R. Knopp +* \date 2014 +* \version 0.1 +* \company Eurecom +* \email: knopp@eurecom.fr +* \note +* \warning +*/ + +#ifdef USER_MODE +#include +#include +#endif + +#include "defs.h" +#include "PHY/defs.h" +#include "log.h" + +//extern unsigned int lte_gold_table[3][20][2][14]; +//#define DEBUG_DL_CELL_SPEC + +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}}; + +int lte_dl_ue_spec(PHY_VARS_eNB *phy_vars_eNB, + uint8_t UE_id, + mod_sym_t *output, + short amp, + uint8_t Ns, + uint8_t p, + int SS_flag ) { + + mod_sym_t qpsk[4],nqpsk[4],*qpsk_p,*output_p; + int16_t a; + int w,lprime,ind,l,ind_dword,ind_qpsk_symb,nPRB; + // LTE_eNB_DLSCH_t *dlsch = phy_vars_eNB->dlsch_eNB[UE_id][0]; + + a = (amp*ONE_OVER_SQRT2_Q15)>>15; + ((short *)&qpsk[0])[0] = a; + ((short *)&qpsk[0])[1] = a; + ((short *)&qpsk[1])[0] = -a; + ((short *)&qpsk[1])[1] = a; + ((short *)&qpsk[2])[0] = a; + ((short *)&qpsk[2])[1] = -a; + ((short *)&qpsk[3])[0] = -a; + ((short *)&qpsk[3])[1] = -a; + + ((short *)&nqpsk[0])[0] = -a; + ((short *)&nqpsk[0])[1] = -a; + ((short *)&nqpsk[1])[0] = a; + ((short *)&nqpsk[1])[1] = -a; + ((short *)&nqpsk[2])[0] = -a; + ((short *)&nqpsk[2])[1] = a; + ((short *)&nqpsk[3])[0] = a; + ((short *)&nqpsk[3])[1] = a; + + if (p>=7) { + if (SS_flag==0) { + if (phy_vars_eNB->lte_frame_parms.Ncp == NORMAL) { + // this is 3GPP 36-211 6.10.3.2, NORMAL CP, p>=7 + + + + // position output pointer to 5th symbol in slot + output_p = output+(60*phy_vars_eNB->lte_frame_parms.N_RB_DL); + // shift to 2nd RE in PRB for p=7,8,11,13 + if ((p==7) || (p==8) || (p==11) || (p==13)) output_p++; + + + for (lprime=0;lprime<2;lprime++) { + + ind = 3*lprime*phy_vars_eNB->lte_frame_parms.N_RB_DL; + l = lprime + ((Ns&1)<<1); + + // loop over pairs of PRBs, this is the periodicity of the W_bar_NCP sequence + // unroll the computations for the 6 pilots, select qpsk or nqpsk as function of W_bar_NCP + for (nPRB=0;nPRBlte_frame_parms.N_RB_DL;nPRB+=2) { + + // First pilot + w = Wbar_NCP[p-7][l]; + qpsk_p = (w==1) ? qpsk : nqpsk; + + + ind_dword = ind>>4; + ind_qpsk_symb = ind&0xf; + + *output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3]; + + +#ifdef DEBUG_DL_UESPEC + LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n", + Ns,l,m,mprime_dword,mprime_qpsk_symb); + LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3); +#endif + + output_p+=5; + ind++; + + w = Wbar_NCP[p-7][3-l]; + qpsk_p = (w==1) ? qpsk : nqpsk; + + // Second pilot + ind_dword = ind>>4; + ind_qpsk_symb = ind&0xf; + + *output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3]; + +#ifdef DEBUG_DL_UESPEC + LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n", + Ns,l,m,mprime_dword,mprime_qpsk_symb); + LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3); +#endif + + output_p+=5; + ind++; + + w = Wbar_NCP[p-7][l]; + qpsk_p = (w==1) ? qpsk : nqpsk; + // Third pilot + ind_dword = ind>>4; + ind_qpsk_symb = ind&0xf; + + *output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3]; + +#ifdef DEBUG_DL_UESPEC + LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n", + Ns,l,m,mprime_dword,mprime_qpsk_symb); + LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3); +#endif + + output_p+=2; + ind++; + + // Fourth pilot + w = Wbar_NCP[p-7][3-l]; + qpsk_p = (w==1) ? qpsk : nqpsk; + + + ind_dword = ind>>4; + ind_qpsk_symb = ind&0xf; + + *output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3]; + + +#ifdef DEBUG_DL_UESPEC + LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n", + Ns,l,m,mprime_dword,mprime_qpsk_symb); + LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3); +#endif + + output_p+=5; + ind++; + + w = Wbar_NCP[p-7][l]; + qpsk_p = (w==1) ? qpsk : nqpsk; + + // Fifth pilot + ind_dword = ind>>4; + ind_qpsk_symb = ind&0xf; + + *output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3]; + +#ifdef DEBUG_DL_UESPEC + LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n", + Ns,l,m,mprime_dword,mprime_qpsk_symb); + LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3); +#endif + + output_p+=5; + ind++; + + w = Wbar_NCP[p-7][3-l]; + qpsk_p = (w==1) ? qpsk : nqpsk; + // Sixth pilot + ind_dword = ind>>4; + ind_qpsk_symb = ind&0xf; + + *output_p = qpsk_p[(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3]; + +#ifdef DEBUG_DL_UESPEC + LOG_D(PHY,"Ns %d, l %d, m %d,ind_dword %d, ind_qpsk_symbol %d\n", + Ns,l,m,mprime_dword,mprime_qpsk_symb); + LOG_D(PHY,"index = %d\n",(phy_vars_eNB->lte_gold_uespec_table[0][Ns][lprime][ind_dword]>>(2*ind_qpsk_symb))&3); +#endif + + output_p+=2; + ind++; + } + } + } + else { + LOG_E(PHY,"Special subframe not supported for UE specific pilots yet\n"); + } + } + } + else if (p==5) { + LOG_E(PHY,"p=5 not supported for UE specific pilots yet\n"); + } + else { + LOG_E(PHY,"Illegal p %d UE specific pilots\n",p); + } + return(0); +} + +/* +int lte_dl_cell_spec_rx(PHY_VARS_UE *phy_vars_ue, + uint8_t eNB_offset, + int *output, + unsigned char Ns, + unsigned char l, + unsigned char p) { + + + unsigned char mprime,mprime_dword,mprime_qpsk_symb,m; + unsigned short k=0; + unsigned int qpsk[4]; + short pamp; + + // Compute the correct pilot amplitude, sqrt_rho_b = Q3.13 + pamp = ONE_OVER_SQRT2_Q15; + + // This includes complex conjugate for channel estimation + + ((short *)&qpsk[0])[0] = pamp; + ((short *)&qpsk[0])[1] = -pamp; + ((short *)&qpsk[1])[0] = -pamp; + ((short *)&qpsk[1])[1] = -pamp; + ((short *)&qpsk[2])[0] = pamp; + ((short *)&qpsk[2])[1] = pamp; + ((short *)&qpsk[3])[0] = -pamp; + ((short *)&qpsk[3])[1] = pamp; + + mprime = 110 - phy_vars_ue->lte_frame_parms.N_RB_DL; + + for (m=0;mlte_frame_parms.N_RB_DL<<1;m++) { + + mprime_dword = mprime>>4; + mprime_qpsk_symb = mprime&0xf; + + // this is r_mprime from 3GPP 36-211 6.10.1.2 + output[k] = qpsk[(phy_vars_ue->lte_gold_table[eNB_offset][Ns][l][mprime_dword]>>(2*mprime_qpsk_symb))&3]; +#ifdef DEBUG_DL_CELL_SPEC + printf("Ns %d, l %d, m %d,mprime_dword %d, mprime_qpsk_symbol %d\n", + Ns,l,m,mprime_dword,mprime_qpsk_symb); + printf("index = %d (k %d)\n",(phy_vars_ue->lte_gold_table[eNB_offset][Ns][l][mprime_dword]>>(2*mprime_qpsk_symb))&3,k); +#endif + + mprime++; +#ifdef DEBUG_DL_CELL_SPEC + if (m<4) + printf("Ns %d l %d output[%d] = (%d,%d)\n",Ns,l,k,((short *)&output[k])[0],((short *)&output[k])[1]); +#endif + k++; + } + return(0); +} + +*/ + +#ifdef LTE_DL_CELL_SPEC_MAIN + + + +//extern int write_output(const char *,const char *,void *,int,int,char); +// flag change eren +extern int write_output(const char *,const char *,void *,int,int,char); +main() { + + unsigned short Nid_cell=0; + unsigned int Ncp = 0; + int output00[1024]; + int output01[1024]; + int output10[1024]; + int output11[1024]; + + memset(output00,0,1024*sizeof(int)); + memset(output01,0,1024*sizeof(int)); + memset(output10,0,1024*sizeof(int)); + memset(output11,0,1024*sizeof(int)); + + lte_gold(Nid_cell,Ncp); + + lte_dl_cell_spec(output00, + ONE_OVER_SQRT2_Q15, + 50, + Nid_cell, + Ncp, + 0, + 0, + 0, + 0); + + lte_dl_cell_spec(output10, + ONE_OVER_SQRT2_Q15, + 50, + Nid_cell, + Ncp, + 0, + 1, + 0, + 0); + + lte_dl_cell_spec(output01, + ONE_OVER_SQRT2_Q15, + 50, + Nid_cell, + Ncp, + 0, + 0, + 1, + 0); + + lte_dl_cell_spec(output11, + ONE_OVER_SQRT2_Q15, + 50, + Nid_cell, + Ncp, + 0, + 1, + 1, + 0); + + + write_output("dl_cell_spec00.m","dl_cs00",output00,1024,1,1); + write_output("dl_cell_spec01.m","dl_cs01",output01,1024,1,1); + write_output("dl_cell_spec10.m","dl_cs10",output10,1024,1,1); + write_output("dl_cell_spec11.m","dl_cs11",output11,1024,1,1); +} + + +#endif