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Commit 53922c13 authored by hardy's avatar hardy
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Merge remote-tracking branch 'origin/ptrs_ul_phase_compensation' into integration_2020_wk37

parents 0d9fc950 8f58d1ec
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.gitignore
View file @ 53922c13
......@@ -12,3 +12,9 @@ targets/bin/
# vscode
.vscode
# Tags for vim/global
GPATH
GRTAGS
GTAGS
tags
cmake_targets/CMakeLists.txt
View file @ 53922c13
......@@ -2377,6 +2377,7 @@ add_library(LFDS7
add_library(SIMU_COMMON
${OPENAIR1_DIR}/SIMULATION/TOOLS/random_channel.c
${OPENAIR1_DIR}/SIMULATION/TOOLS/rangen_double.c
${OPENAIR1_DIR}/SIMULATION/TOOLS/phase_noise.c
)
# Simulation library
......
cmake_targets/autotests/test_case_list.xml
View file @ 53922c13
......@@ -1276,7 +1276,10 @@
(Test2: MCS 16 50 PRBs),
(Test3: MCS 28 50 PRBs),
(Test4: MCS 9 217 PRBs),
(Test5: MCS 9 273 PRBs)</desc>
(Test5: MCS 9 273 PRBs),
(Test6: DMRS Type A, 3 DMRS, 4 PTRS, 5 Interpolated Symbols),
(Test7: DMRS Type B, 3 DMRS, 2 PTRS, 7 Interpolated Symbols),
(Test8: DMRS Type B, 3 DMRS, 2 PTRS, 3 Interpolated Symbols)</desc>
<pre_compile_prog></pre_compile_prog>
<compile_prog>$OPENAIR_DIR/cmake_targets/build_oai</compile_prog>
<compile_prog_args> --phy_simulators -c </compile_prog_args>
......@@ -1287,8 +1290,11 @@
-n100 -m16 -s10
-n100 -m28 -s20
-n100 -m9 -R217 -r217 -s5
-n100 -m9 -R273 -r273 -s5</main_exec_args>
<tags>nr_ulsim.test1 nr_ulsim.test2 nr_ulsim.test3 nr_ulsim.test4 nr_ulsim.test5</tags>
-n100 -m9 -R273 -r273 -s5
-n100 -s5 -T 2 1 2 -U 2 0 2
-n100 -s5 -T 2 2 2 -U 2 1 2
-n100 -s5 -a4 -b8 -T 2 1 2 -U 2 1 3</main_exec_args>
<tags>nr_ulsim.test1 nr_ulsim.test2 nr_ulsim.test3 nr_ulsim.test4 nr_ulsim.test5 nr_ulsim.test6 nr_ulsim.test7 nr_ulsim.test8</tags>
<search_expr_true>PUSCH test OK</search_expr_true>
<search_expr_false>segmentation fault|assertion|exiting|fatal</search_expr_false>
<nruns>3</nruns>
......
cmake_targets/build_oai
View file @ 53922c13
......@@ -211,7 +211,7 @@ function main() {
GDB=0
CMAKE_BUILD_TYPE="RelWithDebInfo"
echo_info "Will Compile with gdb symbols"
CMAKE_CMD="$CMAKE_CMD -DCMAKE_BUILD_TYPE=RelWithDebInfo"
CMAKE_CMD="$CMAKE_CMD -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_EXPORT_COMPILE_COMMANDS=1"
shift
;;
"MinSizeRel")
......
openair1/PHY/INIT/nr_init.c
View file @ 53922c13
......@@ -251,6 +251,7 @@ int phy_init_nr_gNB(PHY_VARS_gNB *gNB,
pusch_vars[ULSCH_id]->ul_ch_estimates_ext = (int32_t **)malloc16(Prx*sizeof(int32_t *) );
pusch_vars[ULSCH_id]->ul_ch_ptrs_estimates = (int32_t **)malloc16(Prx*sizeof(int32_t *) );
pusch_vars[ULSCH_id]->ul_ch_ptrs_estimates_ext = (int32_t **)malloc16(Prx*sizeof(int32_t *) );
pusch_vars[ULSCH_id]->ptrs_phase_per_slot = (int32_t **)malloc16(Prx*sizeof(int32_t *) );
pusch_vars[ULSCH_id]->ul_ch_estimates_time = (int32_t **)malloc16(Prx*sizeof(int32_t *) );
pusch_vars[ULSCH_id]->rxdataF_comp = (int32_t **)malloc16(Prx*sizeof(int32_t *) );
pusch_vars[ULSCH_id]->ul_ch_mag0 = (int32_t **)malloc16(Prx*sizeof(int32_t *) );
......@@ -268,6 +269,7 @@ int phy_init_nr_gNB(PHY_VARS_gNB *gNB,
pusch_vars[ULSCH_id]->ul_ch_estimates_time[i] = (int32_t *)malloc16_clear( 2*sizeof(int32_t)*fp->ofdm_symbol_size );
pusch_vars[ULSCH_id]->ul_ch_ptrs_estimates[i] = (int32_t *)malloc16_clear( sizeof(int32_t)*fp->ofdm_symbol_size*2*fp->symbols_per_slot ); // max intensity in freq is 1 sc every 2 RBs
pusch_vars[ULSCH_id]->ul_ch_ptrs_estimates_ext[i] = (int32_t *)malloc16_clear( sizeof(int32_t)*fp->ofdm_symbol_size*2*fp->symbols_per_slot );
pusch_vars[ULSCH_id]->ptrs_phase_per_slot[i] = (int32_t *)malloc16_clear( sizeof(int32_t)*fp->symbols_per_slot); // symbols per slot
pusch_vars[ULSCH_id]->rxdataF_comp[i] = (int32_t *)malloc16_clear( sizeof(int32_t)*N_RB_UL*12*fp->symbols_per_slot );
pusch_vars[ULSCH_id]->ul_ch_mag0[i] = (int32_t *)malloc16_clear( fp->symbols_per_slot*sizeof(int32_t)*N_RB_UL*12 );
pusch_vars[ULSCH_id]->ul_ch_magb0[i] = (int32_t *)malloc16_clear( fp->symbols_per_slot*sizeof(int32_t)*N_RB_UL*12 );
......@@ -278,6 +280,7 @@ int phy_init_nr_gNB(PHY_VARS_gNB *gNB,
printf("ULSCH_id %d (before llr alloc) : %p\n",ULSCH_id,gNB->dlsch[0][0]->harq_processes[0]);
pusch_vars[ULSCH_id]->llr = (int16_t *)malloc16_clear( (8*((3*8*6144)+12))*sizeof(int16_t) ); // [hna] 6144 is LTE and (8*((3*8*6144)+12)) is not clear
printf("ULSCH_id %d (after llr alloc) : %p\n",ULSCH_id,gNB->dlsch[0][0]->harq_processes[0]);
pusch_vars[ULSCH_id]->ul_valid_re_per_slot = (int16_t *)malloc16_clear( sizeof(int16_t)*fp->symbols_per_slot);
} //ulsch_id
/*
for (ulsch_id=0; ulsch_id<NUMBER_OF_UE_MAX; ulsch_id++)
......@@ -338,6 +341,7 @@ void phy_free_nr_gNB(PHY_VARS_gNB *gNB)
free_and_zero(pusch_vars[ULSCH_id]->ul_ch_estimates_time[i]);
free_and_zero(pusch_vars[ULSCH_id]->ul_ch_ptrs_estimates[i]);
free_and_zero(pusch_vars[ULSCH_id]->ul_ch_ptrs_estimates_ext[i]);
free_and_zero(pusch_vars[ULSCH_id]->ptrs_phase_per_slot[i]);
free_and_zero(pusch_vars[ULSCH_id]->rxdataF_comp[i]);
free_and_zero(pusch_vars[ULSCH_id]->ul_ch_mag0[i]);
free_and_zero(pusch_vars[ULSCH_id]->ul_ch_magb0[i]);
......@@ -353,6 +357,8 @@ void phy_free_nr_gNB(PHY_VARS_gNB *gNB)
free_and_zero(pusch_vars[ULSCH_id]->ul_ch_ptrs_estimates);
free_and_zero(pusch_vars[ULSCH_id]->ul_ch_ptrs_estimates_ext);
free_and_zero(pusch_vars[ULSCH_id]->ul_ch_estimates_time);
free_and_zero(pusch_vars[ULSCH_id]->ptrs_phase_per_slot);
free_and_zero(pusch_vars[ULSCH_id]->ul_valid_re_per_slot);
free_and_zero(pusch_vars[ULSCH_id]->rxdataF_comp);
free_and_zero(pusch_vars[ULSCH_id]->ul_ch_mag0);
free_and_zero(pusch_vars[ULSCH_id]->ul_ch_magb0);
......
openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
View file @ 53922c13
......@@ -25,6 +25,8 @@
#include "nr_ul_estimation.h"
#include "PHY/sse_intrin.h"
#include "PHY/NR_REFSIG/nr_refsig.h"
#include "PHY/NR_REFSIG/ptrs_nr.h"
#include "PHY/NR_TRANSPORT/nr_transport_proto.h"
#include "PHY/NR_UE_ESTIMATION/filt16a_32.h"
//#define DEBUG_CH
......@@ -507,3 +509,408 @@ int nr_pusch_channel_estimation(PHY_VARS_gNB *gNB,
return(0);
}
/*******************************************************************
*
* NAME : nr_pusch_ptrs_processing
*
* PARAMETERS : gNB : gNB data structure
* rel15_ul : UL parameters
* UE_id : UE ID
* nr_tti_rx : slot rx TTI
* dmrs_symbol_flag: DMRS Symbol Flag
* symbol : OFDM Symbol
* nb_re_pusch : PUSCH RE's
* nb_re_pusch : PUSCH RE's
*
* RETURN : nothing
*
* DESCRIPTION :
* If ptrs is enabled process the symbol accordingly
* 1) Estimate phase noise per PTRS symbol
* 2) Interpolate PTRS estimated value in TD after all PTRS symbols
* 3) Compensated DMRS based estimated signal with PTRS estimation for slot
*********************************************************************/
void nr_pusch_ptrs_processing(PHY_VARS_gNB *gNB,
nfapi_nr_pusch_pdu_t *rel15_ul,
uint8_t ulsch_id,
uint8_t nr_tti_rx,
uint8_t dmrs_symbol_flag,
unsigned char symbol,
uint32_t nb_re_pusch)
{
NR_DL_FRAME_PARMS *frame_parms = &gNB->frame_parms;
int16_t *phase_per_symbol;
uint8_t L_ptrs = 0;
uint8_t right_side_ref = 0;
uint8_t left_side_ref = 0;
uint8_t nb_dmrs_in_slot = 0;
//#define DEBUG_UL_PTRS 1
/* First symbol calculate PTRS symbol index for slot & set the variables */
if(symbol == rel15_ul->start_symbol_index)
{
gNB->pusch_vars[ulsch_id]->ptrs_symbols = 0;
L_ptrs = 1<<(rel15_ul->pusch_ptrs.ptrs_time_density);
set_ptrs_symb_idx(&gNB->pusch_vars[ulsch_id]->ptrs_symbols,
rel15_ul->nr_of_symbols,
rel15_ul->start_symbol_index,
L_ptrs,
rel15_ul->ul_dmrs_symb_pos);
}/* First symbol check */
/* loop over antennas */
for (int aarx=0; aarx< frame_parms->nb_antennas_rx; aarx++)
{
phase_per_symbol = (int16_t*)gNB->pusch_vars[ulsch_id]->ptrs_phase_per_slot[aarx];
/* set the previous estimations to zero at first symbol */
if(symbol == rel15_ul->start_symbol_index)
{
memset(phase_per_symbol,0,sizeof(int32_t)*frame_parms->symbols_per_slot);
}
/* if not PTRS symbol set current ptrs symbol index to zero*/
gNB->pusch_vars[ulsch_id]->ptrs_symbol_index = 0;
gNB->pusch_vars[ulsch_id]->ptrs_sc_per_ofdm_symbol = 0;
/* Check if current symbol contains PTRS */
if(is_ptrs_symbol(symbol, gNB->pusch_vars[ulsch_id]->ptrs_symbols))
{
gNB->pusch_vars[ulsch_id]->ptrs_symbol_index = symbol;
/*------------------------------------------------------------------------------------------------------- */
/* 1) Estimate phase noise per PTRS symbol */
/*------------------------------------------------------------------------------------------------------- */
nr_pusch_phase_estimation(frame_parms,
rel15_ul,
(int16_t *)&gNB->pusch_vars[ulsch_id]->ul_ch_ptrs_estimates_ext[aarx][symbol*nb_re_pusch],
nr_tti_rx,
symbol,
(int16_t*)&gNB->pusch_vars[ulsch_id]->rxdataF_comp[aarx][(symbol * nb_re_pusch)],
gNB->nr_gold_pusch_dmrs[rel15_ul->scid],
&phase_per_symbol[2* symbol],
&gNB->pusch_vars[ulsch_id]->ptrs_sc_per_ofdm_symbol);
}
/* DMRS Symbol channel estimates extraction */
else if(dmrs_symbol_flag)
{
phase_per_symbol[2* symbol]= (int16_t)((1<<15)-1); // 32767
phase_per_symbol[2* symbol +1]= 0;// no angle
}
/* For last OFDM symbol at each antenna perform interpolation and compensation for the slot*/
if(symbol == (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols -1))
{
nb_dmrs_in_slot = get_dmrs_symbols_in_slot(rel15_ul->ul_dmrs_symb_pos,(rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols));
for(uint8_t dmrs_sym = 0; dmrs_sym < nb_dmrs_in_slot; dmrs_sym ++)
{
if(dmrs_sym == 0)
{
/* get first DMRS position */
left_side_ref = get_next_dmrs_symbol_in_slot(rel15_ul->ul_dmrs_symb_pos, rel15_ul->start_symbol_index, (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols));
/* get first DMRS position is not at start symbol position then we need to extrapolate left side */
if(left_side_ref > rel15_ul->start_symbol_index)
{
left_side_ref = rel15_ul->start_symbol_index;
}
}
/* get the next symbol from left_side_ref value */
right_side_ref = get_next_dmrs_symbol_in_slot(rel15_ul->ul_dmrs_symb_pos, left_side_ref+1, (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols));
/* if no symbol found then interpolate till end of slot*/
if(right_side_ref == 0)
{
right_side_ref = (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols);
}
/*------------------------------------------------------------------------------------------------------- */
/* 2) Interpolate PTRS estimated value in TD */
/*------------------------------------------------------------------------------------------------------- */
nr_pusch_phase_interpolation(phase_per_symbol,left_side_ref,right_side_ref);
/* set left to last dmrs */
left_side_ref = right_side_ref;
} /*loop over dmrs positions */
#ifdef DEBUG_UL_PTRS
LOG_M("ptrsEst.m","est",gNB->pusch_vars[ulsch_id]->ptrs_phase_per_slot[aarx],frame_parms->symbols_per_slot,1,1 );
LOG_M("rxdataF_bf_ptrs_comp.m","bf_ptrs_cmp",
&gNB->pusch_vars[0]->rxdataF_comp[aarx][rel15_ul->start_symbol_index * NR_NB_SC_PER_RB * rel15_ul->rb_size],
rel15_ul->nr_of_symbols * NR_NB_SC_PER_RB * rel15_ul->rb_size,1,1);
#endif
/*------------------------------------------------------------------------------------------------------- */
/* 3) Compensated DMRS based estimated signal with PTRS estimation */
/*--------------------------------------------------------------------------------------------------------*/
for(uint8_t i =rel15_ul->start_symbol_index; i< (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols);i++)
{
#ifdef DEBUG_UL_PTRS
printf("PTRS: Rotate Symbol %2d with %d + j* %d\n", i, phase_per_symbol[2* i],phase_per_symbol[(2* i) +1]);
#endif
rotate_cpx_vector((int16_t*)&gNB->pusch_vars[ulsch_id]->rxdataF_comp[aarx][(i * rel15_ul->rb_size * NR_NB_SC_PER_RB)],
&phase_per_symbol[2* i],
(int16_t*)&gNB->pusch_vars[ulsch_id]->rxdataF_comp[aarx][(i * rel15_ul->rb_size * NR_NB_SC_PER_RB)],
(rel15_ul->rb_size * NR_NB_SC_PER_RB),
15);
}// symbol loop
}//interpolation and compensation
}// Antenna loop
}
/*******************************************************************
*
* NAME : nr_pusch_phase_estimation
*
* PARAMETERS : frame_parms : UL frame parameters
* rel15_ul : UL PDU Structure
* Ns :
* Symbol : OFDM symbol index
* rxF : Channel compensated signal
* ptrs_gold_seq: Gold sequence for PTRS regeneration
* error_est : Estimated error output vector [Re Im]
* RETURN : nothing
*
* DESCRIPTION :
* perform phase estimation from regenerated PTRS SC and channel compensated
* signal
*********************************************************************/
void nr_pusch_phase_estimation(NR_DL_FRAME_PARMS *frame_parms,
nfapi_nr_pusch_pdu_t *rel15_ul,
int16_t *ptrs_ch_p,
unsigned char Ns,
unsigned char symbol,
int16_t *rxF_comp,
uint32_t ***ptrs_gold_seq,
int16_t *error_est,
uint16_t *ptrs_sc)
{
uint8_t is_ptrs_re = 0;
uint16_t re_cnt = 0;
uint16_t cnt = 0;
unsigned short nb_re_pusch = NR_NB_SC_PER_RB * rel15_ul->rb_size;
uint8_t K_ptrs = rel15_ul->pusch_ptrs.ptrs_freq_density;
uint16_t sc_per_symbol = (rel15_ul->rb_size + K_ptrs - 1)/K_ptrs;
int16_t *ptrs_p = (int16_t *)malloc(sizeof(int32_t)*(sc_per_symbol));
int16_t *dmrs_comp_p = (int16_t *)malloc(sizeof(int32_t)*(sc_per_symbol));
double abs = 0.0;
double real = 0.0;
double imag = 0.0;
#ifdef DEBUG_UL_PTRS
double alpha = 0;
#endif
/* generate PTRS RE for the symbol */
nr_gen_ref_conj_symbols(ptrs_gold_seq[Ns][symbol],sc_per_symbol*2,ptrs_p, NR_MOD_TABLE_QPSK_OFFSET,2);// 2 for QPSK
/* loop over all sub carriers to get compensated RE on ptrs symbols*/
for (int re = 0; re < nb_re_pusch; re++)
{
is_ptrs_re = is_ptrs_subcarrier(re,
rel15_ul->rnti,
0,
rel15_ul->dmrs_config_type,
K_ptrs,
rel15_ul->rb_size,
rel15_ul->pusch_ptrs.ptrs_ports_list[0].ptrs_re_offset,
0,// start_re is 0 here
frame_parms->ofdm_symbol_size);
if(is_ptrs_re)
{
dmrs_comp_p[re_cnt*2] = rxF_comp[re *2];
dmrs_comp_p[(re_cnt*2)+1] = rxF_comp[(re *2)+1];
re_cnt++;
}
else
{
/* Skip PTRS symbols and keep data in a continuous vector */
rxF_comp[cnt *2]= rxF_comp[re *2];
rxF_comp[(cnt *2)+1]= rxF_comp[(re *2)+1];
cnt++;
}
}/* RE loop */
/* update the total ptrs RE in a symbol */
*ptrs_sc = re_cnt;
/*Multiple compensated data with conj of PTRS */
mult_cpx_vector(dmrs_comp_p, ptrs_p, ptrs_ch_p,(1 + sc_per_symbol/4)*4,15); // 2^15 shifted
/* loop over all ptrs sub carriers in a symbol */
/* sum the error vector */
for(int i = 0;i < sc_per_symbol; i++)
{
real+= ptrs_ch_p[(2*i)];
imag+= ptrs_ch_p[(2*i)+1];
}
#ifdef DEBUG_UL_PTRS
alpha = atan(imag/real);
printf("PTRS: Symbol %d atan(Im,real):= %f \n",symbol, alpha );
#endif
/* mean */
real /= sc_per_symbol;
imag /= sc_per_symbol;
/* absolute calculation */
abs = sqrt(((real * real) + (imag * imag)));
/* normalized error estimation */
error_est[0]= (real / abs)*(1<<15);
/* compensation in given by conjugate of estimated phase (e^-j*2*pi*fd*t)*/
error_est[1]= (-1)*(imag / abs)*(1<<15);
#ifdef DEBUG_UL_PTRS
printf("PTRS: Estimated Symbol %d -> %d + j* %d \n",symbol, error_est[0], error_est[1] );
#endif
/* free vectors */
free(ptrs_p);
free(dmrs_comp_p);
}
/*******************************************************************
*
* NAME : nr_pusch_phase_interpolation
*
* PARAMETERS : *error_est : Data Pointer [Re Im Re Im ...]
* start_symbol : Start Symbol
* end_symbol : End Symbol
* RETURN : nothing
*
* DESCRIPTION :
* Perform Interpolation, extrapolation based upon the estimation
* location between the data Pointer Array.
*
*********************************************************************/
void nr_pusch_phase_interpolation(int16_t *error_est,
uint8_t start_symbol,
uint8_t end_symbol
)
{
int next = 0, prev = 0, candidates= 0, distance=0, leftEdge= 0, rightEdge = 0, getDiff =0 ;
double weight = 0.0;
double scale = 0.125 ; // to avoid saturation due to fixed point multiplication
#ifdef DEBUG_UL_PTRS
printf("PTRS: INT: Left limit %d, Right limit %d, Loop over %d Symbols \n",
start_symbol,end_symbol-1, (end_symbol -start_symbol)-1);
#endif
for(int i =start_symbol; i< end_symbol;i++)
{
/* Only update when an estimation is found */
if( error_est[i*2] != 0 )
{
/* if found a symbol then set next symbol also */
next = nr_ptrs_find_next_estimate(error_est, i, end_symbol);
/* left extrapolation, if first estimate value is zero */
if( error_est[i*2] == 0 )
{
leftEdge = 1;
}
/* right extrapolation, if next is 0 before end symbol */
if((next == 0) && (end_symbol > i))
{
rightEdge = 1;
/* special case as no right extrapolation possible with DMRS on left */
/* In this case take mean of most recent 2 estimated points */
if(prev ==0)
{
prev = start_symbol -1;
next = start_symbol -2;
getDiff =1;
}else
{
/* for right edge previous is second last from right side */
next = prev;
/* Set the current as recent estimation reference */
prev = i;
}
}
/* update current symbol as prev for next symbol */
if (rightEdge==0)
/* Set the current as recent estimation reference */
prev = i;
}
/*extrapolation left side*/
if(leftEdge)
{
distance = next - prev;
weight = 1.0/distance;
candidates = i;
for(int j = 1; j <= candidates; j++)
{
error_est[(i-j)*2] = 8 *(((double)(error_est[prev*2]) * scale * (distance + j) * weight) -
((double)(error_est[next*2]) * scale * j * weight));
error_est[((i-j)*2)+1]= 8 *(((double)(error_est[(prev*2)+1]) * scale* (distance + j) * weight) -
((double)(error_est[((next*2)+1)]) * scale * j * weight));
#ifdef DEBUG_UL_PTRS
printf("PTRS: INT: Left Edge i= %d weight= %f %d + j*%d, Prev %d Next %d \n",
(i-j),weight, error_est[(i-j)*2],error_est[((i-j)*2)+1], prev,next);
#endif
}
leftEdge = 0;
}
/* extrapolation at right side */
else if (rightEdge )
{
if(getDiff)
{
error_est[(i+1)*2] = ((1<<15) +(error_est[prev*2]) - error_est[next*2]);
error_est[((i+1)*2)+1]= error_est[(prev*2)+1] - error_est[(next*2)+1];
#ifdef DEBUG_UL_PTRS
printf("PTRS: INT: Right Edge Special Case i= %d weight= %f %d + j*%d, Prev %d Next %d \n",
(i+1),weight, error_est[(i+1)*2],error_est[((i+1)*2)+1], prev,next);
#endif
i++;
}
else
{
distance = prev - next;
candidates = (end_symbol -1) - i;
weight = 1.0/distance;
for(int j = 1; j <= candidates; j++)
{
error_est[(i+j)*2] = 8 *(((double)(error_est[prev*2]) * scale * (distance + j) * weight) -
((double)(error_est[next*2]) * scale * j * weight));
error_est[((i+j)*2)+1]= 8 *(((double)(error_est[(prev*2)+1]) * scale * (distance + j) * weight) -
((double)(error_est[((next*2)+1)]) * scale *j * weight));
#ifdef DEBUG_UL_PTRS
printf("PTRS: INT: Right Edge i= %d weight= %f %d + j*%d, Prev %d Next %d \n",
(i+j),weight, error_est[(i+j)*2],error_est[((i+j)*2)+1], prev,next);
#endif
}
if(candidates > 1)
{
i+=candidates;
}
}
}
/* Interpolation between 2 estimated points */
else if(next != 0 && ( error_est[2*i] == 0 ))
{
distance = next - prev;
weight = 1.0/distance;
candidates = next - i ;
for(int j = 0; j < candidates; j++)
{
error_est[(i+j)*2] = 8 *(((double)(error_est[prev*2]) * scale * (distance - (j+1)) * weight) +
((double)(error_est[next*2]) * scale * (j+1) * weight));
error_est[((i+j)*2)+1]= 8 *(((double)(error_est[(prev*2)+1]) * scale *(distance - (j+1)) * weight) +
((double)(error_est[((next*2)+1)]) * scale *(j+1) * weight));
#ifdef DEBUG_UL_PTRS
printf("PTRS: INT: Interpolation i= %d weight= %f %d + j*%d, Prev %d Next %d\n",
(i+j),weight, error_est[(i+j)*2],error_est[((i+j)*2)+1],prev,next);
#endif
}
if(candidates > 1)
{
i+=candidates-1;
}
}// interpolation
}// symbol loop
}
/* Find the next non zero Real value in a complex vector */
int nr_ptrs_find_next_estimate(int16_t *error_est,
uint8_t counter,
uint8_t end_symbol)
{
for (int i = counter +1 ; i< end_symbol; i++)
{
if( error_est[2*i] != 0)
{
return i;
}
}
return 0;
}
openair1/PHY/NR_ESTIMATION/nr_ul_estimation.h
View file @ 53922c13
......@@ -51,4 +51,30 @@ void gNB_I0_measurements(PHY_VARS_gNB *gNB);
int nr_est_timing_advance_pusch(PHY_VARS_gNB* phy_vars_gNB, int UE_id);
void nr_pusch_ptrs_processing(PHY_VARS_gNB *gNB,
nfapi_nr_pusch_pdu_t *rel15_ul,
uint8_t ulsch_id,
uint8_t nr_tti_rx,
uint8_t dmrs_symbol_flag,
unsigned char symbol,
uint32_t nb_re_pusch);
void nr_pusch_phase_estimation(NR_DL_FRAME_PARMS *frame_parms,
nfapi_nr_pusch_pdu_t *rel15_ul,
int16_t *ptrs_ch_p,
unsigned char Ns,
unsigned char symbol,
int16_t *rxF_comp,
uint32_t ***ptrs_gold_seq,
int16_t *error_est,
uint16_t *ptrs_sc);
void nr_pusch_phase_interpolation(int16_t *error_est,
uint8_t start_symbol,
uint8_t end_symbol);
int nr_ptrs_find_next_estimate(int16_t *error_est,
uint8_t counter,
uint8_t end_symbol);
#endif
openair1/PHY/NR_REFSIG/dmrs_nr.c
View file @ 53922c13
......@@ -362,4 +362,25 @@ void generate_dmrs_pbch(uint32_t dmrs_pbch_bitmap[DMRS_PBCH_I_SSB][DMRS_PBCH_N_H
free(dmrs_sequence);
#endif
}
/* return the position of next dmrs symbol in a slot */
int get_next_dmrs_symbol_in_slot(uint16_t ul_dmrs_symb_pos, uint8_t counter, uint8_t end_symbol)
{
for(uint8_t symbol = counter; symbol < end_symbol; symbol++)
if((ul_dmrs_symb_pos >>symbol)&0x01 )
{
return symbol;
}
return 0;
}
/* return the total number of dmrs symbol in a slot */
uint8_t get_dmrs_symbols_in_slot(uint16_t l_prime_mask, uint16_t nb_symb)
{
uint8_t tmp = 0;
for (int i = 0; i < nb_symb; i++)
{
tmp += (l_prime_mask >> i) & 0x01;
}
return tmp;
}
openair1/PHY/NR_REFSIG/nr_dmrs_rx.c
View file @ 53922c13
......@@ -223,3 +223,27 @@ int nr_pbch_dmrs_rx(int symbol,
return(0);
}
/*!
\brief This function generate gold ptrs sequence for each OFDM symbol
\param *in gold sequence for ptrs per OFDM symbol
\param length is number of RE in a OFDM symbol
\param *output pointer to all ptrs RE in a OFDM symbol
*/
void nr_gen_ref_conj_symbols(uint32_t *in, uint32_t length, int16_t *output, uint16_t offset, int mod_order)
{
uint8_t idx, b_idx;
for (int i=0; i<length/mod_order; i++)
{
idx = 0;
for (int j=0; j<mod_order; j++)
{
b_idx = (i*mod_order+j)&0x1f;
if (i && (!b_idx))
in++;
idx ^= (((*in)>>b_idx)&1)<<(mod_order-j-1);
}
output[i<<1] = nr_rx_mod_table[(offset+idx)<<1];
output[(i<<1)+1] = nr_rx_mod_table[((offset+idx)<<1)+1];
}
}
openair1/PHY/NR_REFSIG/nr_refsig.h
View file @ 53922c13
......@@ -52,6 +52,9 @@ int nr_pusch_dmrs_rx(PHY_VARS_gNB *gNB,
uint8_t dmrs_type);
void init_scrambling_luts(void);
void nr_gen_ref_conj_symbols(uint32_t *in, uint32_t length, int16_t *output, uint16_t offset, int mod_order);
uint8_t get_next_dmrs_symbol_in_slot(uint16_t ul_dmrs_symb_pos, uint8_t counter, uint8_t end_symbol);
uint8_t get_dmrs_symbols_in_slot(uint16_t l_prime_mask, uint16_t nb_symb);
void nr_generate_modulation_table(void);
......
openair1/PHY/NR_TRANSPORT/nr_transport_proto.h
View file @ 53922c13
......@@ -157,7 +157,6 @@ void nr_ulsch_extract_rbs_single(int32_t **rxdataF,
NR_gNB_PUSCH *pusch_vars,
unsigned char symbol,
uint8_t is_dmrs_symbol,
uint8_t is_ptrs_symbol,
nfapi_nr_pusch_pdu_t *pusch_pdu,
NR_DL_FRAME_PARMS *frame_parms);
......
openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c
View file @ 53922c13
......@@ -226,25 +226,19 @@ void nr_ulsch_extract_rbs_single(int32_t **rxdataF,
NR_gNB_PUSCH *pusch_vars,
unsigned char symbol,
uint8_t is_dmrs_symbol,
uint8_t is_ptrs_symbol,
nfapi_nr_pusch_pdu_t *pusch_pdu,
NR_DL_FRAME_PARMS *frame_parms)
{
unsigned short start_re, re, nb_re_pusch;
unsigned char aarx;
uint8_t K_ptrs = 0;
uint32_t rxF_ext_index = 0;
uint32_t ul_ch0_ext_index = 0;
uint32_t ul_ch0_index = 0;
uint32_t ul_ch0_ptrs_ext_index = 0;
uint32_t ul_ch0_ptrs_index = 0;
uint8_t k_prime;
uint16_t n=0, num_ptrs_symbols;
uint16_t n;
int16_t *rxF,*rxF_ext;
int *ul_ch0,*ul_ch0_ext;
int *ul_ch0_ptrs,*ul_ch0_ptrs_ext;
uint16_t n_rnti = pusch_pdu->rnti;
uint8_t delta = 0;
#ifdef DEBUG_RB_EXT
......@@ -254,7 +248,7 @@ void nr_ulsch_extract_rbs_single(int32_t **rxdataF,
#endif
uint8_t is_dmrs_re=0,is_ptrs_re=0;
uint8_t is_dmrs_re;
start_re = (frame_parms->first_carrier_offset + (pusch_pdu->rb_start * NR_NB_SC_PER_RB))%frame_parms->ofdm_symbol_size;
nb_re_pusch = NR_NB_SC_PER_RB * pusch_pdu->rb_size;
#ifdef __AVX2__
......@@ -263,8 +257,6 @@ void nr_ulsch_extract_rbs_single(int32_t **rxdataF,
int nb_re_pusch2 = nb_re_pusch;
#endif
num_ptrs_symbols = 0;
for (aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++) {
rxF = (int16_t *)&rxdataF[aarx][symbol * frame_parms->ofdm_symbol_size];
......@@ -274,20 +266,17 @@ void nr_ulsch_extract_rbs_single(int32_t **rxdataF,
ul_ch0_ext = &pusch_vars->ul_ch_estimates_ext[aarx][symbol*nb_re_pusch2];
ul_ch0_ptrs = &pusch_vars->ul_ch_ptrs_estimates[aarx][pusch_vars->ptrs_symbol_index*frame_parms->ofdm_symbol_size]; // update channel estimates if new dmrs symbol are available
ul_ch0_ptrs_ext = &pusch_vars->ul_ch_ptrs_estimates_ext[aarx][symbol*nb_re_pusch];
n = 0;
k_prime = 0;
if (is_dmrs_symbol == 0 && is_ptrs_symbol == 0) {
if (is_dmrs_symbol == 0) {
//
//rxF[ ((start_re + re)*2) % (frame_parms->ofdm_symbol_size*2)]);
if (start_re + nb_re_pusch < frame_parms->ofdm_symbol_size) memcpy1((void*)rxF_ext,
if (start_re + nb_re_pusch < frame_parms->ofdm_symbol_size) {
memcpy1((void*)rxF_ext,
(void*)&rxF[start_re*2],
nb_re_pusch*sizeof(int32_t));
else {
} else {
int neg_length = frame_parms->ofdm_symbol_size-start_re;
int pos_length = nb_re_pusch-neg_length;
......@@ -299,34 +288,17 @@ void nr_ulsch_extract_rbs_single(int32_t **rxdataF,
else {
for (re = 0; re < nb_re_pusch; re++) {
if (is_dmrs_symbol) is_dmrs_re = (re == get_dmrs_freq_idx_ul(n, k_prime, delta, pusch_pdu->dmrs_config_type));
if (is_ptrs_symbol) {
K_ptrs = (pusch_pdu->pusch_ptrs.ptrs_freq_density)?4:2;
is_ptrs_re = is_ptrs_subcarrier((start_re + re) % frame_parms->ofdm_symbol_size,
n_rnti,
aarx,
pusch_pdu->dmrs_config_type,
K_ptrs,
pusch_pdu->rb_size,
pusch_pdu->pusch_ptrs.ptrs_ports_list[0].ptrs_re_offset,
start_re,
frame_parms->ofdm_symbol_size);
num_ptrs_symbols+=is_ptrs_re;
}
is_dmrs_re = (re == get_dmrs_freq_idx_ul(n, k_prime, delta, pusch_pdu->dmrs_config_type));
#ifdef DEBUG_RB_EXT
printf("re = %d, kprime %d, n %d, is_ptrs_symbol = %d, symbol = %d\n", re, k_prime,n,is_ptrs_symbol, symbol);
printf("re = %d, kprime %d, n %d, is_dmrs_symbol = %d, symbol = %d\n", re, k_prime, n, is_dmrs_symbol, symbol);
#endif
if ( is_dmrs_re == 0 && is_ptrs_re == 0) {
/* save only data and respective channel estimates */
if (is_dmrs_re == 0) {
rxF_ext[rxF_ext_index] = (rxF[ ((start_re + re)*2) % (frame_parms->ofdm_symbol_size*2)]);
rxF_ext[rxF_ext_index + 1] = (rxF[(((start_re + re)*2) + 1) % (frame_parms->ofdm_symbol_size*2)]);
ul_ch0_ext[ul_ch0_ext_index] = ul_ch0[ul_ch0_index];
ul_ch0_ptrs_ext[ul_ch0_ptrs_ext_index] = ul_ch0_ptrs[ul_ch0_ptrs_index];
#ifdef DEBUG_RB_EXT
printf("dmrs symb %d: rxF_ext[%d] = (%d,%d), ul_ch0_ext[%d] = (%d,%d)\n",
......@@ -334,20 +306,15 @@ void nr_ulsch_extract_rbs_single(int32_t **rxdataF,
ul_ch0_ext_index, ((int16_t*)&ul_ch0_ext[ul_ch0_ext_index])[0], ((int16_t*)&ul_ch0_ext[ul_ch0_ext_index])[1]);
#endif
ul_ch0_ext_index++;
ul_ch0_ptrs_ext_index++;
rxF_ext_index +=2;
} else {
k_prime++;
k_prime&=1;
n+=(k_prime)?0:1;
n += k_prime;
k_prime ^= 1;
}
ul_ch0_index++;
ul_ch0_ptrs_index++;
}
} // is_dmrs_symbol ==0 && is_ptrs_symbol == 0
}
pusch_vars->ptrs_sc_per_ofdm_symbol = num_ptrs_symbols;
}
}
void nr_ulsch_scale_channel(int **ul_ch_estimates_ext,
......@@ -1116,34 +1083,17 @@ int nr_rx_pusch(PHY_VARS_gNB *gNB,
{
uint8_t aarx, aatx, dmrs_symbol_flag; // dmrs_symbol_flag, a flag to indicate DMRS REs in current symbol
uint8_t ptrs_symbol_flag; // a flag to indicate PTRS REs in current symbol
uint32_t nb_re_pusch, bwp_start_subcarrier;
uint8_t L_ptrs = 0; // PTRS parameter
int avgs;
int avg[4];
NR_DL_FRAME_PARMS *frame_parms = &gNB->frame_parms;
nfapi_nr_pusch_pdu_t *rel15_ul = &gNB->ulsch[ulsch_id][0]->harq_processes[harq_pid]->ulsch_pdu;
dmrs_symbol_flag = 0;
ptrs_symbol_flag = 0;
gNB->pusch_vars[ulsch_id]->ptrs_sc_per_ofdm_symbol = 0;
if(symbol == rel15_ul->start_symbol_index){
gNB->pusch_vars[ulsch_id]->rxdataF_ext_offset = 0;
gNB->pusch_vars[ulsch_id]->dmrs_symbol = 0;
gNB->pusch_vars[ulsch_id]->cl_done = 0;
gNB->pusch_vars[ulsch_id]->ptrs_symbols = 0;
if (rel15_ul->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) { // if there is ptrs pdu
L_ptrs = 1<<(rel15_ul->pusch_ptrs.ptrs_time_density);
set_ptrs_symb_idx(&gNB->pusch_vars[ulsch_id]->ptrs_symbols,
rel15_ul->nr_of_symbols,
rel15_ul->start_symbol_index,
L_ptrs,
rel15_ul->ul_dmrs_symb_pos);
}
}
......@@ -1172,13 +1122,6 @@ int nr_rx_pusch(PHY_VARS_gNB *gNB,
nb_re_pusch = rel15_ul->rb_size * NR_NB_SC_PER_RB;
}
if (rel15_ul->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) { // if there is ptrs pdu
if(is_ptrs_symbol(symbol, gNB->pusch_vars[ulsch_id]->ptrs_symbols)) {
gNB->pusch_vars[ulsch_id]->ptrs_symbol_index = symbol;
ptrs_symbol_flag = 1;
}
}
//----------------------------------------------------------
//--------------------- Channel estimation ---------------------
//----------------------------------------------------------
......@@ -1206,16 +1149,21 @@ int nr_rx_pusch(PHY_VARS_gNB *gNB,
if (nb_re_pusch > 0) {
gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[symbol] = nb_re_pusch;
start_meas(&gNB->ulsch_rbs_extraction_stats);
nr_ulsch_extract_rbs_single(gNB->common_vars.rxdataF,
gNB->pusch_vars[ulsch_id],
symbol,
dmrs_symbol_flag,
ptrs_symbol_flag,
rel15_ul,
frame_parms);
stop_meas(&gNB->ulsch_rbs_extraction_stats);
//----------------------------------------------------------
//--------------------- Channel Scaling --------------------
//----------------------------------------------------------
nr_ulsch_scale_channel(gNB->pusch_vars[ulsch_id]->ul_ch_estimates_ext,
frame_parms,
gNB->ulsch[ulsch_id],
......@@ -1244,6 +1192,10 @@ int nr_rx_pusch(PHY_VARS_gNB *gNB,
gNB->pusch_vars[ulsch_id]->cl_done = 1;
}
//----------------------------------------------------------
//--------------------- Channel Compensation ---------------
//----------------------------------------------------------
start_meas(&gNB->ulsch_channel_compensation_stats);
nr_ulsch_channel_compensation(gNB->pusch_vars[ulsch_id]->rxdataF_ext,
gNB->pusch_vars[ulsch_id]->ul_ch_estimates_ext,
......@@ -1271,29 +1223,54 @@ int nr_rx_pusch(PHY_VARS_gNB *gNB,
nr_idft(&((uint32_t*)gNB->pusch_vars[ulsch_id]->rxdataF_ext[0])[symbol * rel15_ul->rb_size * NR_NB_SC_PER_RB], nb_re_pusch);
#endif
//----------------------------------------------------------
//-------------------- LLRs computation --------------------
//--------------------- PTRS Processing --------------------
//----------------------------------------------------------
start_meas(&gNB->ulsch_llr_stats);
AssertFatal(gNB->pusch_vars[ulsch_id]->rxdataF_ext_offset * rel15_ul->qam_mod_order+nb_re_pusch*rel15_ul->qam_mod_order < (8*((3*8*6144)+12)) , "Mysterious llr buffer size check");
/* In case PTRS is enabled then LLR will be calculated after PTRS symbols are processed *
* otherwise LLR are calculated for each symbol based upon DMRS channel estimates only. */
if (rel15_ul->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS)
{
start_meas(&gNB->ulsch_ptrs_processing_stats);
nr_pusch_ptrs_processing(gNB,
rel15_ul,
ulsch_id,
nr_tti_rx,
dmrs_symbol_flag,
symbol,
nb_re_pusch);
stop_meas(&gNB->ulsch_ptrs_processing_stats);
/* Subtract total PTRS RE's in the symbol from PUSCH RE's */
gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[symbol] -= gNB->pusch_vars[ulsch_id]->ptrs_sc_per_ofdm_symbol;
}
/*---------------------------------------------------------------------------------------------------- */
/*-------------------- LLRs computation -------------------------------------------------------------*/
/*-----------------------------------------------------------------------------------------------------*/
if(symbol == (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols -1))
{
#ifdef __AVX2__
int off = ((rel15_ul->rb_size&1) == 1)? 4:0;
#else
int off = 0;
#endif
nr_ulsch_compute_llr(&gNB->pusch_vars[ulsch_id]->rxdataF_comp[0][symbol * (off+(rel15_ul->rb_size * NR_NB_SC_PER_RB))],
uint32_t rxdataF_ext_offset = 0;
for(uint8_t i =rel15_ul->start_symbol_index; i< (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols);i++) {
start_meas(&gNB->ulsch_llr_stats);
nr_ulsch_compute_llr(&gNB->pusch_vars[ulsch_id]->rxdataF_comp[0][i * (off + rel15_ul->rb_size * NR_NB_SC_PER_RB)],
gNB->pusch_vars[ulsch_id]->ul_ch_mag0,
gNB->pusch_vars[ulsch_id]->ul_ch_magb0,
&gNB->pusch_vars[ulsch_id]->llr[gNB->pusch_vars[ulsch_id]->rxdataF_ext_offset * rel15_ul->qam_mod_order],
&gNB->pusch_vars[ulsch_id]->llr[rxdataF_ext_offset * rel15_ul->qam_mod_order],
rel15_ul->rb_size,
nb_re_pusch,
symbol,
gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[i],
i,
rel15_ul->qam_mod_order);
stop_meas(&gNB->ulsch_llr_stats);
rxdataF_ext_offset += gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[i];
}// symbol loop
}// last symbol check
}
gNB->pusch_vars[ulsch_id]->rxdataF_ext_offset = gNB->pusch_vars[ulsch_id]->rxdataF_ext_offset + nb_re_pusch;
return (0);
}
openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c
View file @ 53922c13
......@@ -226,12 +226,12 @@ void nr_ue_ulsch_procedures(PHY_VARS_NR_UE *UE,
/////////////////////////PTRS parameters' initialization/////////////////////////
///////////
int16_t mod_ptrs[(nb_rb/2)*(NR_SYMBOLS_PER_SLOT-1)*2]; // assume maximum number of PTRS per pusch allocation
int16_t mod_ptrs[nb_rb] __attribute((aligned(16))); // assume maximum number of PTRS per pusch allocation
K_ptrs = 0; // just to avoid a warning
if (harq_process_ul_ue->pusch_pdu.pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) {
K_ptrs = (harq_process_ul_ue->pusch_pdu.pusch_ptrs.ptrs_freq_density)?4:2;
K_ptrs = harq_process_ul_ue->pusch_pdu.pusch_ptrs.ptrs_freq_density;
L_ptrs = 1<<harq_process_ul_ue->pusch_pdu.pusch_ptrs.ptrs_time_density;
beta_ptrs = 1; // temp value until power control is implemented
......@@ -322,7 +322,7 @@ void nr_ue_ulsch_procedures(PHY_VARS_NR_UE *UE,
uint16_t m=0, n=0, dmrs_idx=0, ptrs_idx = 0;
for (l=start_symbol; l<start_symbol+number_of_symbols; l++) {
ptrs_idx = 0; // every PTRS symbol has a new gold sequence
k = start_sc;
n = 0;
dmrs_idx = 0;
......
openair1/PHY/defs_gNB.h
View file @ 53922c13
......@@ -397,8 +397,6 @@ typedef struct {
/// - first index: rx antenna id [0..nb_antennas_rx[
/// - second index (definition from phy_init_lte_eNB()): ? [0..12*N_RB_UL*frame_parms->symbols_per_tti[
int32_t **rxdataF_ext2;
/// \brief Offset for calculating the index of rxdataF_ext for the current symbol
uint32_t rxdataF_ext_offset;
/// \brief Hold the channel estimates in time domain based on DRS.
/// - first index: rx antenna id [0..nb_antennas_rx[
/// - second index: ? [0..4*ofdm_symbol_size[
......@@ -466,6 +464,13 @@ typedef struct {
uint16_t ptrs_symbols;
// PTRS subcarriers per OFDM symbol
uint16_t ptrs_sc_per_ofdm_symbol;
/// \brief Estimated phase error based upon PTRS on each symbol .
/// - first index: ? [0..7] Number of Antenna
/// - second index: ? [0...14] smybol per slot
int32_t **ptrs_phase_per_slot;
/// \brief Total RE count after DMRS/PTRS RE's are extracted from respective symbol.
/// - first index: ? [0...14] smybol per slot
int16_t *ul_valid_re_per_slot;
/// flag to verify if channel level computation is done
uint8_t cl_done;
} NR_gNB_PUSCH;
......@@ -807,10 +812,12 @@ typedef struct PHY_VARS_gNB_s {
time_stats_t ulsch_deinterleaving_stats;
time_stats_t ulsch_unscrambling_stats;
time_stats_t ulsch_channel_estimation_stats;
time_stats_t ulsch_ptrs_processing_stats;
time_stats_t ulsch_channel_compensation_stats;
time_stats_t ulsch_rbs_extraction_stats;
time_stats_t ulsch_mrc_stats;
time_stats_t ulsch_llr_stats;
/*
time_stats_t rx_dft_stats;
time_stats_t ulsch_freq_offset_estimation_stats;
......
openair1/SIMULATION/NR_PHY/ulsim.c
View file @ 53922c13
......@@ -165,6 +165,13 @@ int main(int argc, char **argv)
//float eff_tp_check = 0.7;
uint8_t snrRun;
int enable_ptrs = 0;
int modify_dmrs = 0;
/* L_PTRS = ptrs_arg[0], K_PTRS = ptrs_arg[1] */
int ptrs_arg[2] = {-1,-1};// Invalid values
/* DMRS TYPE = dmrs_arg[0], Add Pos = dmrs_arg[1] */
int dmrs_arg[2] = {-1,-1};// Invalid values
UE_nr_rxtx_proc_t UE_proc;
FILE *scg_fd=NULL;
int file_offset = 0;
......@@ -181,7 +188,7 @@ int main(int argc, char **argv)
//logInit();
randominit(0);
while ((c = getopt(argc, argv, "a:b:c:d:ef:g:h:i:j:kl:m:n:p:r:s:y:z:F:M:N:PR:S:L:G:H:")) != -1) {
while ((c = getopt(argc, argv, "a:b:c:d:ef:g:h:i:j:kl:m:n:p:r:s:y:z:F:G:H:M:N:PR:S:T:U:L:")) != -1) {
printf("handling optarg %c\n",c);
switch (c) {
......@@ -360,6 +367,14 @@ int main(int argc, char **argv)
break;
case 'G':
file_offset = atoi(optarg);
break;
case 'H':
slot = atoi(optarg);
break;
case 'M':
// SSB_positions = atoi(optarg);
break;
......@@ -388,12 +403,18 @@ int main(int argc, char **argv)
loglvl = atoi(optarg);
break;
case 'G':
file_offset = atoi(optarg);
case 'T':
enable_ptrs=1;
for(i=0; i < atoi(optarg); i++){
ptrs_arg[i] = atoi(argv[optind++]);
}
break;
case 'H':
slot = atoi(optarg);
case 'U':
modify_dmrs = 1;
for(i=0; i < atoi(optarg); i++){
dmrs_arg[i] = atoi(argv[optind++]);
}
break;
default:
......@@ -425,6 +446,8 @@ int main(int argc, char **argv)
printf("-t Acceptable effective throughput (in percentage)\n");
printf("-S Ending SNR, runs from SNR0 to SNR1\n");
printf("-P Print ULSCH performances\n");
printf("-T Enable PTRS, arguments list L_PTRS{0,1,2} K_PTRS{2,4}, e.g. -T 2 0 2 \n");
printf("-U Change DMRS Config, arguments list DMRS TYPE{0=A,1=B} DMRS AddPos{0:3}, e.g. -U 2 0 2 \n");
exit(-1);
break;
......@@ -469,7 +492,7 @@ int main(int argc, char **argv)
UE2gNB->max_Doppler = maxDoppler;
RC.gNB = (PHY_VARS_gNB **) malloc(sizeof(PHY_VARS_gNB *));
RC.gNB[0] = malloc(sizeof(PHY_VARS_gNB));
RC.gNB[0] = calloc(1,sizeof(PHY_VARS_gNB));
gNB = RC.gNB[0];
//gNB_config = &gNB->gNB_config;
......@@ -513,7 +536,7 @@ int main(int argc, char **argv)
0);
fix_scc(scc,ssb_bitmap);
xer_fprint(stdout, &asn_DEF_NR_CellGroupConfig, (const void*)secondaryCellGroup);
// xer_fprint(stdout, &asn_DEF_NR_CellGroupConfig, (const void*)secondaryCellGroup);
AssertFatal((gNB->if_inst = NR_IF_Module_init(0))!=NULL,"Cannot register interface");
......@@ -607,13 +630,9 @@ int main(int argc, char **argv)
nr_scheduled_response_t scheduled_response;
fapi_nr_ul_config_request_t ul_config;
fapi_nr_tx_request_t tx_req;
fapi_nr_tx_request_body_t tx_req_body;
unsigned int TBS;
uint16_t number_dmrs_symbols = 0;
unsigned int available_bits;
uint8_t nb_re_dmrs;
unsigned char mod_order;
uint16_t code_rate;
uint8_t ptrs_mcs1 = 2;
uint8_t ptrs_mcs2 = 4;
uint8_t ptrs_mcs3 = 10;
......@@ -624,23 +643,74 @@ int main(int argc, char **argv)
uint8_t max_rounds = 4;
uint8_t crc_status = 0;
uint8_t length_dmrs = pusch_len1; // [hna] remove dmrs struct
uint16_t l_prime_mask = get_l_prime(nb_symb_sch, typeB, pusch_dmrs_pos0, length_dmrs); // [hna] remove dmrs struct
unsigned char mod_order = nr_get_Qm_ul(Imcs, 0);
uint16_t code_rate = nr_get_code_rate_ul(Imcs, 0);
uint8_t mapping_type = typeB; // Default Values
pusch_dmrs_type_t dmrs_config_type = pusch_dmrs_type1; // Default Values
pusch_dmrs_AdditionalPosition_t add_pos = pusch_dmrs_pos0; // Default Values
/* validate parameters othwerwise default values are used */
/* -U flag can be used to set DMRS parameters*/
if(modify_dmrs)
{
if(dmrs_arg[0] == 0)
{
mapping_type = typeA;
}
else if (dmrs_arg[0] == 1)
{
mapping_type = typeB;
}
/* Additional DMRS positions */
if(dmrs_arg[1] >= 0 && dmrs_arg[1] <=3 )
{
add_pos = dmrs_arg[1];
}
printf("NOTE: DMRS config is modified with Mapping Type %d , Additional Position %d \n", mapping_type, add_pos );
}
uint8_t length_dmrs = pusch_len1;
uint16_t l_prime_mask = get_l_prime(nb_symb_sch, mapping_type, add_pos, length_dmrs);
uint16_t number_dmrs_symbols = get_dmrs_symbols_in_slot(l_prime_mask, nb_symb_sch);
uint8_t nb_re_dmrs = (dmrs_config_type == pusch_dmrs_type1) ? 6 : 4;
unsigned int available_bits = nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, number_dmrs_symbols, mod_order, 1);
unsigned int TBS = nr_compute_tbs(mod_order, code_rate, nb_rb, nb_symb_sch, nb_re_dmrs * number_dmrs_symbols, 0, 0, precod_nbr_layers);
uint8_t ulsch_input_buffer[TBS/8];
ulsch_input_buffer[0] = 0x31;
for (i = 1; i < TBS/8; i++) {
ulsch_input_buffer[i] = (unsigned char) rand();
}
uint8_t ptrs_time_density = get_L_ptrs(ptrs_mcs1, ptrs_mcs2, ptrs_mcs3, Imcs, mcs_table);
uint8_t ptrs_freq_density = get_K_ptrs(n_rb0, n_rb1, nb_rb);
int ptrs_symbols = 0; // to calculate total PTRS RE's in a slot
double ts = 1.0/(frame_parms->subcarrier_spacing * frame_parms->ofdm_symbol_size);
/* -T option enable PTRS */
if(enable_ptrs)
{
/* validate parameters othwerwise default values are used */
if(ptrs_arg[0] == 0 || ptrs_arg[0] == 1 || ptrs_arg[0] == 2 )
{
ptrs_time_density = ptrs_arg[0];
}
if(ptrs_arg[1] == 2 || ptrs_arg[1] == 4 )
{
ptrs_freq_density = ptrs_arg[1];
}
pdu_bit_map |= PUSCH_PDU_BITMAP_PUSCH_PTRS;
printf("NOTE: PTRS Enabled with L %d, K %d \n", ptrs_time_density, ptrs_freq_density );
}
if (input_fd != NULL) max_rounds=1;
if(1<<ptrs_time_density >= nb_symb_sch)
pdu_bit_map &= ~PUSCH_PDU_BITMAP_PUSCH_PTRS; // disable PUSCH PTRS
for (i = 0; i < nb_symb_sch; i++) {
number_dmrs_symbols += (l_prime_mask >> i) & 0x01;
}
mod_order = nr_get_Qm_ul(Imcs, 0);
code_rate = nr_get_code_rate_ul(Imcs, 0);
printf("\n");
//for (int i=0;i<16;i++) printf("%f\n",gaussdouble(0.0,1.0));
......@@ -715,6 +785,7 @@ int main(int argc, char **argv)
reset_meas(&gNB->ulsch_ldpc_decoding_stats);
reset_meas(&gNB->ulsch_unscrambling_stats);
reset_meas(&gNB->ulsch_channel_estimation_stats);
reset_meas(&gNB->ulsch_ptrs_processing_stats);
reset_meas(&gNB->ulsch_llr_stats);
reset_meas(&gNB->ulsch_mrc_stats);
reset_meas(&gNB->ulsch_channel_compensation_stats);
......@@ -723,23 +794,6 @@ int main(int argc, char **argv)
UE_proc.nr_tti_tx = slot;
UE_proc.frame_tx = frame;
// --------- setting parameters for gNB --------
/*
rel15_ul->rnti = n_rnti;
rel15_ul->ulsch_pdu_rel15.start_rb = start_rb;
rel15_ul->ulsch_pdu_rel15.number_rbs = nb_rb;
rel15_ul->ulsch_pdu_rel15.start_symbol = start_symbol;
rel15_ul->ulsch_pdu_rel15.number_symbols = nb_symb_sch;
rel15_ul->ulsch_pdu_rel15.length_dmrs = length_dmrs;
rel15_ul->ulsch_pdu_rel15.Qm = mod_order;
rel15_ul->ulsch_pdu_rel15.mcs = Imcs;
rel15_ul->ulsch_pdu_rel15.rv = 0;
rel15_ul->ulsch_pdu_rel15.ndi = 0;
rel15_ul->ulsch_pdu_rel15.n_layers = precod_nbr_layers;
rel15_ul->ulsch_pdu_rel15.R = code_rate;
///////////////////////////////////////////////////
*/
UL_tti_req->SFN = frame;
UL_tti_req->Slot = slot;
UL_tti_req->n_pdus = 1;
......@@ -766,6 +820,7 @@ int main(int argc, char **argv)
pusch_pdu->bwp_size = abwp_size;
}
pusch_pdu->pusch_data.tb_size = TBS/8;
pusch_pdu->pdu_bit_map = pdu_bit_map;
pusch_pdu->rnti = n_rnti;
pusch_pdu->mcs_index = Imcs;
......@@ -776,7 +831,7 @@ int main(int argc, char **argv)
pusch_pdu->data_scrambling_id = *scc->physCellId;
pusch_pdu->nrOfLayers = 1;
pusch_pdu->ul_dmrs_symb_pos = l_prime_mask << start_symbol;
pusch_pdu->dmrs_config_type = 0;
pusch_pdu->dmrs_config_type = dmrs_config_type;
pusch_pdu->ul_dmrs_scrambling_id = *scc->physCellId;
pusch_pdu->scid = 0;
pusch_pdu->dmrs_ports = 1;
......@@ -809,8 +864,17 @@ int main(int argc, char **argv)
scheduled_response.slot = slot;
scheduled_response.dl_config = NULL;
scheduled_response.ul_config = &ul_config;
scheduled_response.tx_request = (fapi_nr_tx_request_t *) malloc(sizeof(fapi_nr_tx_request_t));
scheduled_response.tx_request->tx_request_body = (fapi_nr_tx_request_body_t *) malloc(sizeof(fapi_nr_tx_request_body_t));
scheduled_response.tx_request = &tx_req;
scheduled_response.tx_request->tx_request_body = &tx_req_body;
// Config UL TX PDU
tx_req.slot = slot;
tx_req.sfn = frame;
// tx_req->tx_config // TbD
tx_req.number_of_pdus = 1;
tx_req_body.pdu_length = TBS/8;
tx_req_body.pdu_index = 0;
tx_req_body.pdu = &ulsch_input_buffer[0];
ul_config.slot = slot;
ul_config.number_pdus = 1;
......@@ -822,27 +886,22 @@ int main(int argc, char **argv)
ul_config.ul_config_list[0].pusch_config_pdu.nr_of_symbols = nb_symb_sch;
ul_config.ul_config_list[0].pusch_config_pdu.start_symbol_index = start_symbol;
ul_config.ul_config_list[0].pusch_config_pdu.ul_dmrs_symb_pos = l_prime_mask << start_symbol;
ul_config.ul_config_list[0].pusch_config_pdu.dmrs_config_type = 0;
ul_config.ul_config_list[0].pusch_config_pdu.dmrs_config_type = dmrs_config_type;
ul_config.ul_config_list[0].pusch_config_pdu.mcs_index = Imcs;
ul_config.ul_config_list[0].pusch_config_pdu.mcs_table = mcs_table;
ul_config.ul_config_list[0].pusch_config_pdu.num_dmrs_cdm_grps_no_data = 1;
ul_config.ul_config_list[0].pusch_config_pdu.num_dmrs_cdm_grps_no_data = msg3_flag == 0 ? 1 : 2;
ul_config.ul_config_list[0].pusch_config_pdu.nrOfLayers = precod_nbr_layers;
ul_config.ul_config_list[0].pusch_config_pdu.absolute_delta_PUSCH = 0;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.tb_size = TBS;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.new_data_indicator = trial & 0x1;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.rv_index = rv_index;
ul_config.ul_config_list[0].pusch_config_pdu.nrOfLayers = precod_nbr_layers;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.harq_process_id = harq_pid;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_time_density = ptrs_time_density;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_freq_density = ptrs_freq_density;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_ports_list = (nfapi_nr_ue_ptrs_ports_t *) malloc(2*sizeof(nfapi_nr_ue_ptrs_ports_t));
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_ports_list[0].ptrs_re_offset = 0;
//there are plenty of other parameters that we don't seem to be using for now. e.g.
ul_config.ul_config_list[0].pusch_config_pdu.absolute_delta_PUSCH = 0;
nb_re_dmrs = ((ul_config.ul_config_list[0].pusch_config_pdu.dmrs_config_type == pusch_dmrs_type1) ? 6 : 4);
available_bits = nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, number_dmrs_symbols, mod_order, 1);
TBS = nr_compute_tbs(mod_order, code_rate, nb_rb, nb_symb_sch, nb_re_dmrs * number_dmrs_symbols, 0, 0, precod_nbr_layers);
pusch_pdu->pusch_data.tb_size = TBS>>3;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.tb_size = TBS;
nr_fill_ulsch(gNB,frame,slot,pusch_pdu);
......@@ -905,6 +964,11 @@ int main(int argc, char **argv)
for (ap=0; ap<frame_parms->nb_antennas_rx; ap++) {
((int16_t*) &gNB->common_vars.rxdata[ap][slot_offset])[(2*i) + (delay*2)] = (int16_t)((tx_gain*r_re[ap][i]) + (sqrt(sigma/2)*gaussdouble(0.0,1.0))); // convert to fixed point
((int16_t*) &gNB->common_vars.rxdata[ap][slot_offset])[(2*i)+1 + (delay*2)] = (int16_t)((tx_gain*r_im[ap][i]) + (sqrt(sigma/2)*gaussdouble(0.0,1.0)));
/* Add phase noise if enabled */
if (pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) {
phase_noise(ts, &((int16_t*)&gNB->common_vars.rxdata[ap][slot_offset])[(2*i)],
&((int16_t*)&gNB->common_vars.rxdata[ap][slot_offset])[(2*i)+1]);
}
}
}
......@@ -963,6 +1027,20 @@ int main(int argc, char **argv)
}
if(n_trials==1) printf("end of round %d rv_index %d\n",round, rv_index);
//----------------------------------------------------------
//----------------- count and print errors -----------------
//----------------------------------------------------------
if ((pusch_pdu->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) && (SNR==snr0) && (trial==0) && (round==0)) {
ptrs_symbols = 0;
for (int i = pusch_pdu->start_symbol_index; i < pusch_pdu->start_symbol_index + pusch_pdu->nr_of_symbols; i++){
ptrs_symbols += ((gNB->pusch_vars[UE_id]->ptrs_symbols) >> i) & 1;
}
/* 2*5*(50/2), for RB = 50,K = 2 for 5 OFDM PTRS symbols */
available_bits -= 2 * ptrs_symbols * ((nb_rb + ptrs_freq_density - 1) /ptrs_freq_density);
printf("After PTRS subtraction available_bits are : %u \n", available_bits);
}
for (i = 0; i < available_bits; i++) {
if(((ulsch_ue[0]->g[i] == 0) && (gNB->pusch_vars[UE_id]->llr[i] <= 0)) ||
......@@ -977,12 +1055,6 @@ int main(int argc, char **argv)
} // round
//----------------------------------------------------------
//----------------- count and print errors -----------------
//----------------------------------------------------------
if (n_trials == 1 && errors_scrambling[0] > 0) {
printf("\x1B[31m""[frame %d][trial %d]\tnumber of errors in unscrambling = %u\n" "\x1B[0m", frame, trial, errors_scrambling[0]);
}
......@@ -1044,6 +1116,7 @@ int main(int argc, char **argv)
printDistribution(&gNB->phy_proc_rx,table_rx,"Total PHY proc rx");
printStatIndent(&gNB->rx_pusch_stats,"RX PUSCH time");
printStatIndent2(&gNB->ulsch_channel_estimation_stats,"ULSCH channel estimation time");
printStatIndent2(&gNB->ulsch_ptrs_processing_stats,"ULSCH PTRS Processing time");
printStatIndent2(&gNB->ulsch_rbs_extraction_stats,"ULSCH rbs extraction time");
printStatIndent2(&gNB->ulsch_channel_compensation_stats,"ULSCH channel compensation time");
printStatIndent2(&gNB->ulsch_mrc_stats,"ULSCH mrc computation");
......
openair1/SIMULATION/TOOLS/phase_noise.c 0 → 100644
View file @ 53922c13
/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include "sim.h"
/* linear phase noise model */
void phase_noise(double ts, int16_t * InRe, int16_t * InIm)
{
double fd = 300;//0.01*30000
static double i=0;
double real, imag,x ,y;
i++;
real = cos(fd * 2 * M_PI * i * ts);
imag = sin (fd * 2 * M_PI * i * ts);
x = ((real * (double)InRe[0]) - (imag * (double)InIm[0])) ;
y= ((real * (double)InIm[0]) + (imag * (double)InRe[0])) ;
InRe[0]= (int16_t)(x);
InIm[0]= (int16_t)(y);
}
openair1/SIMULATION/TOOLS/sim.h
View file @ 53922c13
......@@ -460,6 +460,14 @@ void init_channelmod(void) ;
double N_RB2sampling_rate(uint16_t N_RB);
double N_RB2channel_bandwidth(uint16_t N_RB);
/* Linear phase noise model */
/*!
\brief This function produce phase noise and add to input signal
\param ts Sampling time
\param *Re *Im Real and Imag part of the signal
*/
void phase_noise(double ts, int16_t * InRe, int16_t * InIm);
#include "targets/RT/USER/rfsim.h"
void do_DL_sig(sim_t *sim,
......
openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c
View file @ 53922c13
......@@ -1940,9 +1940,9 @@ uint8_t get_K_ptrs(uint16_t nrb0, uint16_t nrb1, uint16_t N_RB) {
LOG_I(PHY,"PUSH PT-RS is not present.\n");
return -1;
} else if (N_RB >= nrb0 && N_RB < nrb1)
return 0;
return 2;
else
return 1;
return 4;
}
uint16_t nr_dci_size(NR_ServingCellConfigCommon_t *scc,
......
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