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openairinterface5g/openair1/PHY/NR_UE_TRANSPORT/dci_nr.c
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/*
* 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
*/
/*! \file PHY/LTE_TRANSPORT/dci_nr.c
* \brief Implements PDCCH physical channel TX/RX procedures (36.211) and DCI encoding/decoding (36.212/36.213). Current LTE compliance V8.6 2009-03.
* \author R. Knopp, A. Mico Pereperez
* \date 2018
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr
* \note
* \warning
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "executables/softmodem-common.h"
#include "nr_transport_proto_ue.h"
#include "PHY/CODING/nrPolar_tools/nr_polar_dci_defs.h"
#include "PHY/phy_extern_nr_ue.h"
#include "PHY/CODING/coding_extern.h"
#include "PHY/sse_intrin.h"
#include "common/utils/nr/nr_common.h"
#include <openair1/PHY/TOOLS/phy_scope_interface.h>
#include "assertions.h"
#include "T.h"
char nr_dci_format_string[8][30] = {
"NR_DL_DCI_FORMAT_1_0",
"NR_DL_DCI_FORMAT_1_1",
"NR_DL_DCI_FORMAT_2_0",
"NR_DL_DCI_FORMAT_2_1",
"NR_DL_DCI_FORMAT_2_2",
"NR_DL_DCI_FORMAT_2_3",
"NR_UL_DCI_FORMAT_0_0",
"NR_UL_DCI_FORMAT_0_1"};
//#define DEBUG_DCI_DECODING 1
//#define NR_PDCCH_DCI_DEBUG // activates NR_PDCCH_DCI_DEBUG logs
#ifdef NR_PDCCH_DCI_DEBUG
#define LOG_DDD(a, ...) printf("<-NR_PDCCH_DCI_DEBUG (%s)-> " a, __func__, ##__VA_ARGS__ )
#else
#define LOG_DDD(a...)
#endif
#define NR_NBR_CORESET_ACT_BWP 3 // The number of CoreSets per BWP is limited to 3 (including initial CORESET: ControlResourceId 0)
#define NR_NBR_SEARCHSPACE_ACT_BWP 10 // The number of SearSpaces per BWP is limited to 10 (including initial SEARCHSPACE: SearchSpaceId 0)
#ifdef LOG_I
#undef LOG_I
#define LOG_I(A,B...) printf(B)
#endif
//static const int16_t conjugate[8]__attribute__((aligned(32))) = {-1,1,-1,1,-1,1,-1,1};
static void nr_pdcch_demapping_deinterleaving(uint32_t *llr,
uint32_t *e_rx,
uint8_t coreset_time_dur,
uint8_t start_symbol,
uint32_t coreset_nbr_rb,
uint8_t reg_bundle_size_L,
uint8_t coreset_interleaver_size_R,
uint8_t n_shift,
uint8_t number_of_candidates,
uint16_t *CCE,
uint8_t *L) {
/*
* This function will do demapping and deinterleaving from llr containing demodulated symbols
* Demapping will regroup in REG and bundles
* Deinterleaving will order the bundles
*
* In the following example we can see the process. The llr contains the demodulated IQs, but they are not ordered from REG 0,1,2,..
* In e_rx (z) we will order the REG ids and group them into bundles.
* Then we will put the bundles in the correct order as indicated in subclause 7.3.2.2
*
llr --------------------------> e_rx (z) ----> e_rx (z)
| ...
| ...
| REG 26
symbol 2 | ...
| ...
| REG 5
| REG 2
| ...
| ...
| REG 25
symbol 1 | ...
| ...
| REG 4
| REG 1
| ...
| ... ... ...
| REG 24 (bundle 7) ... ...
symbol 0 | ... bundle 3 bundle 6
| ... bundle 2 bundle 1
| REG 3 bundle 1 bundle 7
| REG 0 (bundle 0) bundle 0 bundle 0
*/
int c = 0, r = 0;
uint16_t f_bundle_j = 0;
uint32_t coreset_C = 0;
uint16_t index_z, index_llr;
int coreset_interleaved = 0;
int N_regs = coreset_nbr_rb*coreset_time_dur;
if (reg_bundle_size_L != 0) { // interleaving will be done only if reg_bundle_size_L != 0
coreset_interleaved = 1;
coreset_C = (uint32_t) (N_regs / (coreset_interleaver_size_R * reg_bundle_size_L));
} else {
reg_bundle_size_L = 6;
}
int B_rb = reg_bundle_size_L/coreset_time_dur; // nb of RBs occupied by each REG bundle
int num_bundles_per_cce = 6/reg_bundle_size_L;
int n_cce = N_regs/6;
int max_bundles = n_cce*num_bundles_per_cce;
int f_bundle_j_list[max_bundles];
// for each bundle
for (int nb = 0; nb < max_bundles; nb++) {
if (coreset_interleaved == 0)
f_bundle_j = nb;
else {
if (r == coreset_interleaver_size_R) {
r = 0;
c++;
}
f_bundle_j = ((r * coreset_C) + c + n_shift) % (N_regs / reg_bundle_size_L);
r++;
}
f_bundle_j_list[nb] = f_bundle_j;
}
// Get cce_list indices by bundle index in ascending order
int f_bundle_j_list_ord[number_of_candidates][max_bundles];
for (int c_id = 0; c_id < number_of_candidates; c_id++ ) {
int start_bund_cand = CCE[c_id]*num_bundles_per_cce;
int max_bund_per_cand = L[c_id]*num_bundles_per_cce;
int f_bundle_j_list_id = 0;
for(int nb = 0; nb < max_bundles; nb++) {
for(int bund_cand = start_bund_cand; bund_cand < start_bund_cand+max_bund_per_cand; bund_cand++){
if (f_bundle_j_list[bund_cand] == nb) {
f_bundle_j_list_ord[c_id][f_bundle_j_list_id] = nb;
f_bundle_j_list_id++;
}
}
}
}
int rb_count = 0;
int data_sc = 9; // 9 sub-carriers with data per PRB
for (int c_id = 0; c_id < number_of_candidates; c_id++ ) {
for (int symbol_idx = start_symbol; symbol_idx < start_symbol+coreset_time_dur; symbol_idx++) {
for (int cce_count = 0; cce_count < L[c_id]; cce_count ++) {
for (int k=0; k<NR_NB_REG_PER_CCE/reg_bundle_size_L; k++) { // loop over REG bundles
int f = f_bundle_j_list_ord[c_id][k+NR_NB_REG_PER_CCE*cce_count/reg_bundle_size_L];
for(int rb=0; rb<B_rb; rb++) { // loop over the RBs of the bundle
index_z = data_sc * rb_count;
index_llr = (uint16_t) (f*B_rb + rb + symbol_idx * coreset_nbr_rb) * data_sc;
for (int i = 0; i < data_sc; i++) {
e_rx[index_z + i] = llr[index_llr + i];
#ifdef NR_PDCCH_DCI_DEBUG
LOG_I(PHY,"[candidate=%d,symbol_idx=%d,cce=%d,REG bundle=%d,PRB=%d] z[%d]=(%d,%d) <-> \t llr[%d]=(%d,%d) \n",
c_id,symbol_idx,cce_count,k,f*B_rb + rb,(index_z + i),*(int16_t *) &e_rx[index_z + i],*(1 + (int16_t *) &e_rx[index_z + i]),
(index_llr + i),*(int16_t *) &llr[index_llr + i], *(1 + (int16_t *) &llr[index_llr + i]));
#endif
}
rb_count++;
}
}
}
}
}
}
int32_t nr_pdcch_llr(NR_DL_FRAME_PARMS *frame_parms, int32_t rx_size, int32_t rxdataF_comp[][rx_size],
int16_t *pdcch_llr, uint8_t symbol,uint32_t coreset_nbr_rb) {
int16_t *rxF = (int16_t *) &rxdataF_comp[0][(symbol * coreset_nbr_rb * 12)];
int32_t i;
int16_t *pdcch_llrp;
pdcch_llrp = &pdcch_llr[2 * symbol * coreset_nbr_rb * 9];
if (!pdcch_llrp) {
LOG_E(PHY,"pdcch_qpsk_llr: llr is null, symbol %d\n", symbol);
return (-1);
}
LOG_DDD("llr logs: pdcch qpsk llr for symbol %d (pos %d), llr offset %ld\n",symbol,(symbol*frame_parms->N_RB_DL*12),pdcch_llrp-pdcch_llr);
//for (i = 0; i < (frame_parms->N_RB_DL * ((symbol == 0) ? 16 : 24)); i++) {
for (i = 0; i < (coreset_nbr_rb * ((symbol == 0) ? 18 : 18)); i++) {
if (*rxF > 31)
*pdcch_llrp = 31;
else if (*rxF < -32)
*pdcch_llrp = -32;
else
*pdcch_llrp = (*rxF);
LOG_DDD("llr logs: rb=%d i=%d *rxF:%d => *pdcch_llrp:%d\n",i/18,i,*rxF,*pdcch_llrp);
rxF++;
pdcch_llrp++;
}
return (0);
}
#if 0
int32_t pdcch_llr(NR_DL_FRAME_PARMS *frame_parms,
int32_t **rxdataF_comp,
char *pdcch_llr,
uint8_t symbol) {
int16_t *rxF= (int16_t *) &rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
int32_t i;
char *pdcch_llr8;
pdcch_llr8 = &pdcch_llr[2*symbol*frame_parms->N_RB_DL*12];
if (!pdcch_llr8) {
LOG_E(PHY,"pdcch_qpsk_llr: llr is null, symbol %d\n",symbol);
return(-1);
}
// printf("pdcch qpsk llr for symbol %d (pos %d), llr offset %d\n",symbol,(symbol*frame_parms->N_RB_DL*12),pdcch_llr8-pdcch_llr);
for (i=0; i<(frame_parms->N_RB_DL*((symbol==0) ? 16 : 24)); i++) {
if (*rxF>31)
*pdcch_llr8=31;
else if (*rxF<-32)
*pdcch_llr8=-32;
else
*pdcch_llr8 = (char)(*rxF);
// printf("%d %d => %d\n",i,*rxF,*pdcch_llr8);
rxF++;
pdcch_llr8++;
}
return(0);
}
#endif
//__m128i avg128P;
//compute average channel_level on each (TX,RX) antenna pair
void nr_pdcch_channel_level(int32_t rx_size,
int32_t dl_ch_estimates_ext[][rx_size],
NR_DL_FRAME_PARMS *frame_parms,
int32_t *avg,
int symbol,
uint8_t nb_rb) {
int16_t rb;
uint8_t aarx;
#if defined(__x86_64__) || defined(__i386__)
__m128i *dl_ch128;
__m128i avg128P;
#elif defined(__arm__) || defined(__aarch64__)
int16x8_t *dl_ch128;
int32x4_t *avg128P;
#endif
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
//clear average level
#if defined(__x86_64__) || defined(__i386__)
avg128P = _mm_setzero_si128();
dl_ch128=(__m128i *)&dl_ch_estimates_ext[aarx][symbol*nb_rb*12];
#elif defined(__arm__) || defined(__aarch64__)
dl_ch128=(int16x8_t *)&dl_ch_estimates_ext[aarx][symbol*nb_rb*12];
#endif
for (rb=0; rb<(nb_rb*3)>>2; rb++) {
#if defined(__x86_64__) || defined(__i386__)
avg128P = _mm_add_epi32(avg128P,_mm_madd_epi16(dl_ch128[0],dl_ch128[0]));
avg128P = _mm_add_epi32(avg128P,_mm_madd_epi16(dl_ch128[1],dl_ch128[1]));
avg128P = _mm_add_epi32(avg128P,_mm_madd_epi16(dl_ch128[2],dl_ch128[2]));
#elif defined(__arm__) || defined(__aarch64__)
#endif
// for (int i=0;i<24;i+=2) printf("pdcch channel re %d (%d,%d)\n",(rb*12)+(i>>1),((int16_t*)dl_ch128)[i],((int16_t*)dl_ch128)[i+1]);
dl_ch128+=3;
/*
if (rb==0) {
print_shorts("dl_ch128",&dl_ch128[0]);
print_shorts("dl_ch128",&dl_ch128[1]);
print_shorts("dl_ch128",&dl_ch128[2]);
}
*/
}
DevAssert( nb_rb );
avg[aarx] = (((int32_t *)&avg128P)[0] +
((int32_t *)&avg128P)[1] +
((int32_t *)&avg128P)[2] +
((int32_t *)&avg128P)[3])/(nb_rb*9);
LOG_DDD("Channel level : %d\n",avg[aarx]);
}
#if defined(__x86_64__) || defined(__i386__)
_mm_empty();
_m_empty();
#endif
}
#if defined(__x86_64) || defined(__i386__)
__m128i mmtmpPD0,mmtmpPD1,mmtmpPD2,mmtmpPD3;
#elif defined(__arm__) || defined(__aarch64__)
#endif
// This function will extract the mapped DM-RS PDCCH REs as per 38.211 Section 7.4.1.3.2 (Mapping to physical resources)
void nr_pdcch_extract_rbs_single(uint32_t rxdataF_sz,
c16_t rxdataF[][rxdataF_sz],
int32_t est_size,
int32_t dl_ch_estimates[][est_size],
int32_t rx_size,
int32_t rxdataF_ext[][rx_size],
int32_t dl_ch_estimates_ext[][rx_size],
uint8_t symbol,
NR_DL_FRAME_PARMS *frame_parms,
uint8_t *coreset_freq_dom,
uint32_t coreset_nbr_rb,
uint32_t n_BWP_start) {
/*
* This function is demapping DM-RS PDCCH RE
* Implementing 38.211 Section 7.4.1.3.2 Mapping to physical resources
* PDCCH DM-RS signals are mapped on RE a_k_l where:
* k = 12*n + 4*kprime + 1
* n=0,1,..
* kprime=0,1,2
* According to this equations, DM-RS PDCCH are mapped on k where k%12==1 || k%12==5 || k%12==9
*
*/
#define NBR_RE_PER_RB_WITH_DMRS 12
// after removing the 3 DMRS RE, the RB contains 9 RE with PDCCH
#define NBR_RE_PER_RB_WITHOUT_DMRS 9
uint16_t c_rb, nb_rb = 0;
//uint8_t rb_count_bit;
uint8_t i, j, aarx;
int32_t *dl_ch0, *dl_ch0_ext, *rxF, *rxF_ext;
for (aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++) {
dl_ch0 = &dl_ch_estimates[aarx][frame_parms->ofdm_symbol_size*symbol];
LOG_DDD("dl_ch0 = &dl_ch_estimates[aarx = (%d)][0]\n",aarx);
dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol * (coreset_nbr_rb * NBR_RE_PER_RB_WITH_DMRS)];
LOG_DDD("dl_ch0_ext = &dl_ch_estimates_ext[aarx = (%d)][symbol * (frame_parms->N_RB_DL * 9) = (%d)]\n",
aarx,symbol * (coreset_nbr_rb * NBR_RE_PER_RB_WITH_DMRS));
rxF_ext = &rxdataF_ext[aarx][symbol * (coreset_nbr_rb * NBR_RE_PER_RB_WITH_DMRS)];
LOG_DDD("rxF_ext = &rxdataF_ext[aarx = (%d)][symbol * (frame_parms->N_RB_DL * 9) = (%d)]\n",
aarx,symbol * (coreset_nbr_rb * NBR_RE_PER_RB_WITH_DMRS));
/*
* The following for loop handles treatment of PDCCH contained in table rxdataF (in frequency domain)
* In NR the PDCCH IQ symbols are contained within RBs in the CORESET defined by higher layers which is located within the BWP
* Lets consider that the first RB to be considered as part of the CORESET and part of the PDCCH is n_BWP_start
* Several cases have to be handled differently as IQ symbols are situated in different parts of rxdataF:
* 1. Number of RBs in the system bandwidth is even
* 1.1 The RB is < than the N_RB_DL/2 -> IQ symbols are in the second half of the rxdataF (from first_carrier_offset)
* 1.2 The RB is >= than the N_RB_DL/2 -> IQ symbols are in the first half of the rxdataF (from element 0)
* 2. Number of RBs in the system bandwidth is odd
* (particular case when the RB with DC as it is treated differently: it is situated in symbol borders of rxdataF)
* 2.1 The RB is < than the N_RB_DL/2 -> IQ symbols are in the second half of the rxdataF (from first_carrier_offset)
* 2.2 The RB is > than the N_RB_DL/2 -> IQ symbols are in the first half of the rxdataF (from element 0 + 2nd half RB containing DC)
* 2.3 The RB is == N_RB_DL/2 -> IQ symbols are in the upper border of the rxdataF for first 6 IQ element and the lower border of the rxdataF for the last 6 IQ elements
* If the first RB containing PDCCH within the UE BWP and within the CORESET is higher than half of the system bandwidth (N_RB_DL),
* then the IQ symbol is going to be found at the position 0+c_rb-N_RB_DL/2 in rxdataF and
* we have to point the pointer at (1+c_rb-N_RB_DL/2) in rxdataF
*/
int c_rb_by6;
c_rb = 0;
for (int rb=0;rb<coreset_nbr_rb;rb++,c_rb++) {
c_rb_by6 = c_rb/6;
// skip zeros in frequency domain bitmap
while ((coreset_freq_dom[c_rb_by6>>3] & (1<<(7-(c_rb_by6&7)))) == 0) {
c_rb+=6;
c_rb_by6 = c_rb/6;
}
rxF=NULL;
// first we set initial conditions for pointer to rxdataF depending on the situation of the first RB within the CORESET (c_rb = n_BWP_start)
if (((c_rb + n_BWP_start) < (frame_parms->N_RB_DL >> 1)) && ((frame_parms->N_RB_DL & 1) == 0)) {
//if RB to be treated is lower than middle system bandwidth then rxdataF pointed at (offset + c_br + symbol * ofdm_symbol_size): even case
rxF = (int32_t *)&rxdataF[aarx][(frame_parms->first_carrier_offset + 12 * c_rb + (symbol * (frame_parms->ofdm_symbol_size)))+n_BWP_start*12];
LOG_DDD("in even case c_rb (%d) is lower than half N_RB_DL -> rxF = &rxdataF[aarx = (%d)][(frame_parms->first_carrier_offset + 12 * c_rb + (symbol * (frame_parms->ofdm_symbol_size))) = (%d)]\n",
c_rb,aarx,(frame_parms->first_carrier_offset + 12 * c_rb + (symbol * (frame_parms->ofdm_symbol_size))));
}
if (((c_rb + n_BWP_start) >= (frame_parms->N_RB_DL >> 1)) && ((frame_parms->N_RB_DL & 1) == 0)) {
// number of RBs is even and c_rb is higher than half system bandwidth (we don't skip DC)
// if these conditions are true the pointer has to be situated at the 1st part of the rxdataF
rxF = (int32_t *)&rxdataF[aarx][12*(c_rb + n_BWP_start - (frame_parms->N_RB_DL>>1)) + symbol * frame_parms->ofdm_symbol_size]; // we point at the 1st part of the rxdataF in symbol
LOG_DDD("in even case c_rb (%d) is higher than half N_RB_DL (not DC) -> rxF = &rxdataF[aarx = (%d)][12*(c_rb + n_BWP_start - (frame_parms->N_RB_DL>>1)) + symbol * frame_parms->ofdm_symbol_size = (%d)]\n",
c_rb,aarx,(12*(c_rb + n_BWP_start - (frame_parms->N_RB_DL>>1)) + symbol * frame_parms->ofdm_symbol_size));
}
if (((c_rb + n_BWP_start) < (frame_parms->N_RB_DL >> 1)) && ((frame_parms->N_RB_DL & 1) != 0)) {
//if RB to be treated is lower than middle system bandwidth then rxdataF pointed at (offset + c_br + symbol * ofdm_symbol_size): odd case
rxF = (int32_t *)&rxdataF[aarx][frame_parms->first_carrier_offset + 12 * (c_rb + n_BWP_start) + symbol * frame_parms->ofdm_symbol_size];
LOG_DDD("in odd case c_rb (%d) is lower or equal than half N_RB_DL -> rxF = &rxdataF[aarx = (%d)][frame_parms->first_carrier_offset + 12 * (c_rb + n_BWP_start) + symbol * frame_parms->ofdm_symbol_size = (%d)]\n",
c_rb,aarx,(frame_parms->first_carrier_offset + 12 * (c_rb + n_BWP_start) + symbol * frame_parms->ofdm_symbol_size));
}
if (((c_rb + n_BWP_start) > (frame_parms->N_RB_DL >> 1)) && ((frame_parms->N_RB_DL & 1) != 0)) {
// number of RBs is odd and c_rb is higher than half system bandwidth + 1
// if these conditions are true the pointer has to be situated at the 1st part of the rxdataF just after the first IQ symbols of the RB containing DC
rxF = (int32_t *)&rxdataF[aarx][12*(c_rb + n_BWP_start - (frame_parms->N_RB_DL>>1)) - 6 + symbol * frame_parms->ofdm_symbol_size]; // we point at the 1st part of the rxdataF in symbol
LOG_DDD("in odd case c_rb (%d) is higher than half N_RB_DL (not DC) -> rxF = &rxdataF[aarx = (%d)][12*(c_rb + n_BWP_start - (frame_parms->N_RB_DL>>1)) - 6 + symbol * frame_parms->ofdm_symbol_size = (%d)]\n",
c_rb,aarx,(12*(c_rb + n_BWP_start - (frame_parms->N_RB_DL>>1)) - 6 + symbol * frame_parms->ofdm_symbol_size));
}
if (((c_rb + n_BWP_start) == (frame_parms->N_RB_DL >> 1)) && ((frame_parms->N_RB_DL & 1) != 0)) { // treatment of RB containing the DC
// if odd number RBs in system bandwidth and first RB to be treated is higher than middle system bandwidth (around DC)
// we have to treat the RB in two parts: first part from i=0 to 5, the data is at the end of rxdataF (pointing at the end of the table)
rxF = (int32_t *)&rxdataF[aarx][frame_parms->first_carrier_offset + 12 * (c_rb + n_BWP_start) + symbol * frame_parms->ofdm_symbol_size];
LOG_DDD("in odd case c_rb (%d) is half N_RB_DL + 1 we treat DC case -> rxF = &rxdataF[aarx = (%d)][frame_parms->first_carrier_offset + 12 * (c_rb + n_BWP_start) + symbol * frame_parms->ofdm_symbol_size = (%d)]\n",
c_rb,aarx,(frame_parms->first_carrier_offset + 12 * (c_rb + n_BWP_start) + symbol * frame_parms->ofdm_symbol_size));
j = 0;
for (i = 0; i < 6; i++) { //treating first part of the RB note that i=5 would correspond to DC. We treat it in NR
if ((i != 1) && (i != 5)) {
dl_ch0_ext[j] = dl_ch0[i];
rxF_ext[j] = rxF[i];
LOG_DDD("RB[c_rb %d] \t RE[re %d] => rxF_ext[%d]=(%d,%d)\t rxF[%d]=(%d,%d)\n",
c_rb, i, j, *(short *) &rxF_ext[j],*(1 + (short *) &rxF_ext[j]), i,
*(short *) &rxF[i], *(1 + (short *) &rxF[i]));
j++;
} else {
LOG_DDD("RB[c_rb %d] \t RE[re %d] => rxF_ext[%d]=(%d,%d)\t rxF[%d]=(%d,%d) \t\t <==> DM-RS PDCCH, this is a pilot symbol\n",
c_rb, i, j, *(short *) &rxF_ext[j], *(1 + (short *) &rxF_ext[j]), i,
*(short *) &rxF[i], *(1 + (short *) &rxF[i]));
}
}
// then we point at the begining of the symbol part of rxdataF do process second part of RB
rxF = (int32_t *)&rxdataF[aarx][symbol * frame_parms->ofdm_symbol_size]; // we point at the 1st part of the rxdataF in symbol
LOG_DDD("in odd case c_rb (%d) is half N_RB_DL +1 we treat DC case -> rxF = &rxdataF[aarx = (%d)][symbol * frame_parms->ofdm_symbol_size = (%d)]\n",
c_rb,aarx,(symbol * frame_parms->ofdm_symbol_size));
for (; i < 12; i++) {
if ((i != 9)) {
dl_ch0_ext[j] = dl_ch0[i];
rxF_ext[j] = rxF[i - 6];
LOG_DDD("RB[c_rb %d] \t RE[re %d] => rxF_ext[%d]=(%d,%d)\t rxF[%d]=(%d,%d)\n",
c_rb, i, j, *(short *) &rxF_ext[j],*(1 + (short *) &rxF_ext[j]), i,
*(short *) &rxF[i-6], *(1 + (short *) &rxF[i-6]));
j++;
} else {
LOG_DDD("RB[c_rb %d] \t RE[re %d] => rxF_ext[%d]=(%d,%d)\t rxF[%d]=(%d,%d) \t\t <==> DM-RS PDCCH, this is a pilot symbol\n",
c_rb, i, j, *(short *) &rxF_ext[j], *(1 + (short *) &rxF_ext[j]), i,
*(short *) &rxF[i-6], *(1 + (short *) &rxF[i-6]));
}
}
nb_rb++;
dl_ch0_ext += NBR_RE_PER_RB_WITHOUT_DMRS;
rxF_ext += NBR_RE_PER_RB_WITHOUT_DMRS;
dl_ch0 += 12;
} else { // treatment of any RB that does not contain the DC
j = 0;
for (i = 0; i < 12; i++) {
if ((i != 1) && (i != 5) && (i != 9)) {
rxF_ext[j] = rxF[i];
LOG_DDD("RB[c_rb %d] \t RE[re %d] => rxF_ext[%d]=(%d,%d)\t rxF[%d]=(%d,%d)\n",
c_rb, i, j, *(short *) &rxF_ext[j],*(1 + (short *) &rxF_ext[j]), i,
*(short *) &rxF[i], *(1 + (short *) &rxF[i]));
dl_ch0_ext[j] = dl_ch0[i];
j++;
} else {
LOG_DDD("RB[c_rb %d] \t RE[re %d] => rxF_ext[%d]=(%d,%d)\t rxF[%d]=(%d,%d) \t\t <==> DM-RS PDCCH, this is a pilot symbol\n",
c_rb, i, j, *(short *) &rxF_ext[j], *(1 + (short *) &rxF_ext[j]), i,
*(short *) &rxF[i], *(1 + (short *) &rxF[i]));
}
}
nb_rb++;
dl_ch0_ext += NBR_RE_PER_RB_WITHOUT_DMRS;
rxF_ext += NBR_RE_PER_RB_WITHOUT_DMRS;
dl_ch0 += 12;
}
}
}
}
#define print_shorts(s,x) printf("%s %d,%d,%d,%d,%d,%d,%d,%d\n",s,(x)[0],(x)[1],(x)[2],(x)[3],(x)[4],(x)[5],(x)[6],(x)[7])
void nr_pdcch_channel_compensation(int32_t rx_size, int32_t rxdataF_ext[][rx_size],
int32_t dl_ch_estimates_ext[][rx_size],
int32_t rxdataF_comp[][rx_size],
int32_t **rho,
NR_DL_FRAME_PARMS *frame_parms,
uint8_t symbol,
uint8_t output_shift,
uint32_t coreset_nbr_rb) {
uint16_t rb; //,nb_rb=20;
uint8_t aarx;
#if defined(__x86_64__) || defined(__i386__)
__m128i mmtmpP0,mmtmpP1,mmtmpP2,mmtmpP3;
#elif defined(__arm__) || defined(__aarch64__)
int16x8_t mmtmpP0,mmtmpP1,mmtmpP2,mmtmpP3;
#endif
#if defined(__x86_64__) || defined(__i386__)
__m128i *dl_ch128,*rxdataF128,*rxdataF_comp128;
#elif defined(__arm__) || defined(__aarch64__)
#endif
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
#if defined(__x86_64__) || defined(__i386__)
dl_ch128 = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*coreset_nbr_rb*12];
rxdataF128 = (__m128i *)&rxdataF_ext[aarx][symbol*coreset_nbr_rb*12];
rxdataF_comp128 = (__m128i *)&rxdataF_comp[aarx][symbol*coreset_nbr_rb*12];
//printf("ch compensation dl_ch ext addr %p \n", &dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*20*12]);
//printf("rxdataf ext addr %p symbol %d\n", &rxdataF_ext[aarx][symbol*20*12], symbol);
//printf("rxdataf_comp addr %p\n",&rxdataF_comp[(aatx<<1)+aarx][symbol*20*12]);
#elif defined(__arm__) || defined(__aarch64__)
// to be filled in
#endif
for (rb=0; rb<(coreset_nbr_rb*3)>>2; rb++) {
#if defined(__x86_64__) || defined(__i386__)
// multiply by conjugated channel
mmtmpP0 = _mm_madd_epi16(dl_ch128[0],rxdataF128[0]);
//print_ints("re",&mmtmpP0);
// mmtmpP0 contains real part of 4 consecutive outputs (32-bit)
mmtmpP1 = _mm_shufflelo_epi16(dl_ch128[0],_MM_SHUFFLE(2,3,0,1));
mmtmpP1 = _mm_shufflehi_epi16(mmtmpP1,_MM_SHUFFLE(2,3,0,1));
mmtmpP1 = _mm_sign_epi16(mmtmpP1,*(__m128i *)&conjugate[0]);
//print_ints("im",&mmtmpP1);
mmtmpP1 = _mm_madd_epi16(mmtmpP1,rxdataF128[0]);
// mmtmpP1 contains imag part of 4 consecutive outputs (32-bit)
mmtmpP0 = _mm_srai_epi32(mmtmpP0,output_shift);
// print_ints("re(shift)",&mmtmpP0);
mmtmpP1 = _mm_srai_epi32(mmtmpP1,output_shift);
// print_ints("im(shift)",&mmtmpP1);
mmtmpP2 = _mm_unpacklo_epi32(mmtmpP0,mmtmpP1);
mmtmpP3 = _mm_unpackhi_epi32(mmtmpP0,mmtmpP1);
//print_ints("c0",&mmtmpP2);
//print_ints("c1",&mmtmpP3);
rxdataF_comp128[0] = _mm_packs_epi32(mmtmpP2,mmtmpP3);
// print_shorts("rx:",(int16_t*)rxdataF128);
// print_shorts("ch:",(int16_t*)dl_ch128);
// print_shorts("pack:",(int16_t*)rxdataF_comp128);
// multiply by conjugated channel
mmtmpP0 = _mm_madd_epi16(dl_ch128[1],rxdataF128[1]);
// mmtmpP0 contains real part of 4 consecutive outputs (32-bit)
mmtmpP1 = _mm_shufflelo_epi16(dl_ch128[1],_MM_SHUFFLE(2,3,0,1));
mmtmpP1 = _mm_shufflehi_epi16(mmtmpP1,_MM_SHUFFLE(2,3,0,1));
mmtmpP1 = _mm_sign_epi16(mmtmpP1,*(__m128i *)&conjugate[0]);
mmtmpP1 = _mm_madd_epi16(mmtmpP1,rxdataF128[1]);
// mmtmpP1 contains imag part of 4 consecutive outputs (32-bit)
mmtmpP0 = _mm_srai_epi32(mmtmpP0,output_shift);
mmtmpP1 = _mm_srai_epi32(mmtmpP1,output_shift);
mmtmpP2 = _mm_unpacklo_epi32(mmtmpP0,mmtmpP1);
mmtmpP3 = _mm_unpackhi_epi32(mmtmpP0,mmtmpP1);
rxdataF_comp128[1] = _mm_packs_epi32(mmtmpP2,mmtmpP3);
//print_shorts("rx:",rxdataF128+1);
//print_shorts("ch:",dl_ch128+1);
//print_shorts("pack:",rxdataF_comp128+1);
// multiply by conjugated channel
mmtmpP0 = _mm_madd_epi16(dl_ch128[2],rxdataF128[2]);
// mmtmpP0 contains real part of 4 consecutive outputs (32-bit)
mmtmpP1 = _mm_shufflelo_epi16(dl_ch128[2],_MM_SHUFFLE(2,3,0,1));
mmtmpP1 = _mm_shufflehi_epi16(mmtmpP1,_MM_SHUFFLE(2,3,0,1));
mmtmpP1 = _mm_sign_epi16(mmtmpP1,*(__m128i *)&conjugate[0]);
mmtmpP1 = _mm_madd_epi16(mmtmpP1,rxdataF128[2]);
// mmtmpP1 contains imag part of 4 consecutive outputs (32-bit)
mmtmpP0 = _mm_srai_epi32(mmtmpP0,output_shift);
mmtmpP1 = _mm_srai_epi32(mmtmpP1,output_shift);
mmtmpP2 = _mm_unpacklo_epi32(mmtmpP0,mmtmpP1);
mmtmpP3 = _mm_unpackhi_epi32(mmtmpP0,mmtmpP1);
rxdataF_comp128[2] = _mm_packs_epi32(mmtmpP2,mmtmpP3);
///////////////////////////////////////////////////////////////////////////////////////////////
//print_shorts("rx:",rxdataF128+2);
//print_shorts("ch:",dl_ch128+2);
//print_shorts("pack:",rxdataF_comp128+2);
for (int i=0; i<12 ; i++)
LOG_DDD("rxdataF128[%d]=(%d,%d) X dlch[%d]=(%d,%d) rxdataF_comp128[%d]=(%d,%d)\n",
(rb*12)+i, ((short *)rxdataF128)[i<<1],((short *)rxdataF128)[1+(i<<1)],
(rb*12)+i, ((short *)dl_ch128)[i<<1],((short *)dl_ch128)[1+(i<<1)],
(rb*12)+i, ((short *)rxdataF_comp128)[i<<1],((short *)rxdataF_comp128)[1+(i<<1)]);
dl_ch128+=3;
rxdataF128+=3;
rxdataF_comp128+=3;
#elif defined(__arm__) || defined(__aarch64__)
// to be filled in
#endif
}
}
#if defined(__x86_64__) || defined(__i386__)
_mm_empty();
_m_empty();
#endif
}
void nr_pdcch_detection_mrc(NR_DL_FRAME_PARMS *frame_parms,
int32_t rx_size,
int32_t rxdataF_comp[][rx_size],
uint8_t symbol) {
#if defined(__x86_64__) || defined(__i386__)
__m128i *rxdataF_comp128_0,*rxdataF_comp128_1;
#elif defined(__arm__) || defined(__aarch64__)
int16x8_t *rxdataF_comp128_0,*rxdataF_comp128_1;
#endif
int32_t i;
if (frame_parms->nb_antennas_rx>1) {
#if defined(__x86_64__) || defined(__i386__)
rxdataF_comp128_0 = (__m128i *)&rxdataF_comp[0][symbol*frame_parms->N_RB_DL*12];
rxdataF_comp128_1 = (__m128i *)&rxdataF_comp[1][symbol*frame_parms->N_RB_DL*12];
#elif defined(__arm__) || defined(__aarch64__)
rxdataF_comp128_0 = (int16x8_t *)&rxdataF_comp[0][symbol*frame_parms->N_RB_DL*12];
rxdataF_comp128_1 = (int16x8_t *)&rxdataF_comp[1][symbol*frame_parms->N_RB_DL*12];
#endif
// MRC on each re of rb
for (i=0; i<frame_parms->N_RB_DL*3; i++) {
#if defined(__x86_64__) || defined(__i386__)
rxdataF_comp128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_0[i],1),_mm_srai_epi16(rxdataF_comp128_1[i],1));
#elif defined(__arm__) || defined(__aarch64__)
rxdataF_comp128_0[i] = vhaddq_s16(rxdataF_comp128_0[i],rxdataF_comp128_1[i]);
#endif
}
}
#if defined(__x86_64__) || defined(__i386__)
_mm_empty();
_m_empty();
#endif
}
int32_t nr_rx_pdcch(PHY_VARS_NR_UE *ue,
UE_nr_rxtx_proc_t *proc,
int32_t pdcch_est_size,
int32_t pdcch_dl_ch_estimates[][pdcch_est_size],
int16_t *pdcch_e_rx,
fapi_nr_dl_config_dci_dl_pdu_rel15_t *rel15,
c16_t rxdataF[][ue->frame_parms.samples_per_slot_wCP]) {
uint32_t frame = proc->frame_rx;
uint32_t slot = proc->nr_slot_rx;
NR_DL_FRAME_PARMS *frame_parms = &ue->frame_parms;
uint8_t log2_maxh, aarx;
int32_t avgs;
int32_t avgP[4];
int n_rb,rb_offset;
get_coreset_rballoc(rel15->coreset.frequency_domain_resource,&n_rb,&rb_offset);
// Pointers to extracted PDCCH symbols in frequency-domain.
int32_t rx_size = ((4 * frame_parms->N_RB_DL * 12 + 31) >> 5) << 5;
__attribute__ ((aligned(32))) int32_t rxdataF_ext[frame_parms->nb_antennas_rx][rx_size];
__attribute__ ((aligned(32))) int32_t rxdataF_comp[frame_parms->nb_antennas_rx][rx_size];
__attribute__ ((aligned(32))) int32_t pdcch_dl_ch_estimates_ext[frame_parms->nb_antennas_rx][rx_size];
memset(rxdataF_comp, 0, sizeof(rxdataF_comp));
// Pointer to llrs, 4-bit resolution.
int32_t llr_size = 2*4*n_rb*9;
int16_t llr[llr_size];
memset(llr, 0, sizeof(llr));
LOG_D(PHY,"pdcch coreset: freq %x, n_rb %d, rb_offset %d\n",
rel15->coreset.frequency_domain_resource[0],n_rb,rb_offset);
for (int s=rel15->coreset.StartSymbolIndex; s<(rel15->coreset.StartSymbolIndex+rel15->coreset.duration); s++) {
LOG_D(PHY,"in nr_pdcch_extract_rbs_single(rxdataF -> rxdataF_ext || dl_ch_estimates -> dl_ch_estimates_ext)\n");
nr_pdcch_extract_rbs_single(ue->frame_parms.samples_per_slot_wCP,
rxdataF,
pdcch_est_size,
pdcch_dl_ch_estimates,
rx_size,
rxdataF_ext,
pdcch_dl_ch_estimates_ext,
s,
frame_parms,
rel15->coreset.frequency_domain_resource,
n_rb,
rel15->BWPStart);
LOG_D(PHY,"we enter nr_pdcch_channel_level(avgP=%d) => compute channel level based on ofdm symbol 0, pdcch_vars[eNB_id]->dl_ch_estimates_ext\n",*avgP);
LOG_D(PHY,"in nr_pdcch_channel_level(dl_ch_estimates_ext -> dl_ch_estimates_ext)\n");
// compute channel level based on ofdm symbol 0
nr_pdcch_channel_level(rx_size,
pdcch_dl_ch_estimates_ext,
frame_parms,
avgP,
s,
n_rb);
avgs = 0;
for (aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++)
avgs = cmax(avgs, avgP[aarx]);
log2_maxh = (log2_approx(avgs) / 2) + 5; //+frame_parms->nb_antennas_rx;
#ifdef UE_DEBUG_TRACE
LOG_D(PHY,"slot %d: pdcch log2_maxh = %d (%d,%d)\n",slot,log2_maxh,avgP[0],avgs);
#endif
#if T_TRACER
T(T_UE_PHY_PDCCH_ENERGY, T_INT(0), T_INT(0), T_INT(frame%1024), T_INT(slot),
T_INT(avgP[0]), T_INT(avgP[1]), T_INT(avgP[2]), T_INT(avgP[3]));
#endif
LOG_D(PHY,"we enter nr_pdcch_channel_compensation(log2_maxh=%d)\n",log2_maxh);
LOG_D(PHY,"in nr_pdcch_channel_compensation(rxdataF_ext x dl_ch_estimates_ext -> rxdataF_comp)\n");
// compute LLRs for ofdm symbol 0 only
nr_pdcch_channel_compensation(rx_size, rxdataF_ext,
pdcch_dl_ch_estimates_ext,
rxdataF_comp,
NULL,
frame_parms,
s,
log2_maxh,
n_rb); // log2_maxh+I0_shift
UEscopeCopy(ue, pdcchRxdataF_comp, rxdataF_comp, sizeof(struct complex16), frame_parms->nb_antennas_rx, rx_size);
if (frame_parms->nb_antennas_rx > 1) {
LOG_D(PHY,"we enter nr_pdcch_detection_mrc(frame_parms->nb_antennas_rx=%d)\n", frame_parms->nb_antennas_rx);
nr_pdcch_detection_mrc(frame_parms, rx_size, rxdataF_comp,s);
}
LOG_D(PHY,"we enter nr_pdcch_llr(for symbol %d), pdcch_vars[eNB_id]->rxdataF_comp ---> pdcch_vars[eNB_id]->llr \n",s);
LOG_D(PHY,"in nr_pdcch_llr(rxdataF_comp -> llr)\n");
nr_pdcch_llr(frame_parms,
rx_size,
rxdataF_comp,
llr,
s,
n_rb);
UEscopeCopy(ue, pdcchLlr, llr, sizeof(int16_t), 1, llr_size);
#if T_TRACER
// T(T_UE_PHY_PDCCH_IQ, T_INT(frame_parms->N_RB_DL), T_INT(frame_parms->N_RB_DL),
// T_INT(n_pdcch_symbols),
// T_BUFFER(pdcch_vars[eNB_id]->rxdataF_comp, frame_parms->N_RB_DL*12*n_pdcch_symbols* 4));
#endif
#ifdef DEBUG_DCI_DECODING
printf("demapping: slot %d, mi %d\n",slot,get_mi(frame_parms,slot));
#endif
}
LOG_D(PHY,"we enter nr_pdcch_demapping_deinterleaving(), number of candidates %d\n",rel15->number_of_candidates);
nr_pdcch_demapping_deinterleaving((uint32_t *) llr,
(uint32_t *) pdcch_e_rx,
rel15->coreset.duration,
rel15->coreset.StartSymbolIndex,
n_rb,
rel15->coreset.RegBundleSize,
rel15->coreset.InterleaverSize,
rel15->coreset.ShiftIndex,
rel15->number_of_candidates,
rel15->CCE,
rel15->L);
LOG_D(PHY,"we end nr_pdcch_demapping_deinterleaving()\n");
LOG_D(PHY,"Ending nr_rx_pdcch() function\n");
return (0);
}
void nr_pdcch_unscrambling(int16_t *e_rx,
uint16_t scrambling_RNTI,
uint32_t length,
uint16_t pdcch_DMRS_scrambling_id,
int16_t *z2) {
int i;
uint8_t reset;
uint32_t x1 = 0, x2 = 0, s = 0;
uint16_t n_id; //{0,1,...,65535}
uint32_t rnti = (uint32_t) scrambling_RNTI;
reset = 1;
// x1 is set in first call to lte_gold_generic
n_id = pdcch_DMRS_scrambling_id;
x2 = ((rnti<<16) + n_id); //mod 2^31 is implicit //this is c_init in 38.211 v15.1.0 Section 7.3.2.3
LOG_D(PHY,"PDCCH Unscrambling x2 %x : scrambling_RNTI %x\n", x2, rnti);
for (i = 0; i < length; i++) {
if ((i & 0x1f) == 0) {
s = lte_gold_generic(&x1, &x2, reset);
reset = 0;
}
if (((s >> (i % 32)) & 1) == 1)
z2[i] = -e_rx[i];
else
z2[i]=e_rx[i];
}
}
/* This function compares the received DCI bits with
* re-encoded DCI bits and returns the number of mismatched bits
*/
static uint16_t nr_dci_false_detection(uint64_t *dci,
int16_t *soft_in,
int encoded_length,
int rnti,
int8_t messageType,
uint16_t messageLength,
uint8_t aggregation_level
) {
uint32_t encoder_output[NR_MAX_DCI_SIZE_DWORD];
polar_encoder_fast(dci, (void*)encoder_output, rnti, 1,
messageType, messageLength, aggregation_level);
uint8_t *enout_p = (uint8_t*)encoder_output;
uint16_t x = 0;
for (int i=0; i<encoded_length/8; i++) {
x += ( enout_p[i] & 1 ) ^ ( ( soft_in[i*8] >> 15 ) & 1);
x += ( ( enout_p[i] >> 1 ) & 1 ) ^ ( ( soft_in[i*8+1] >> 15 ) & 1 );
x += ( ( enout_p[i] >> 2 ) & 1 ) ^ ( ( soft_in[i*8+2] >> 15 ) & 1 );
x += ( ( enout_p[i] >> 3 ) & 1 ) ^ ( ( soft_in[i*8+3] >> 15 ) & 1 );
x += ( ( enout_p[i] >> 4 ) & 1 ) ^ ( ( soft_in[i*8+4] >> 15 ) & 1 );
x += ( ( enout_p[i] >> 5 ) & 1 ) ^ ( ( soft_in[i*8+5] >> 15 ) & 1 );
x += ( ( enout_p[i] >> 6 ) & 1 ) ^ ( ( soft_in[i*8+6] >> 15 ) & 1 );
x += ( ( enout_p[i] >> 7 ) & 1 ) ^ ( ( soft_in[i*8+7] >> 15 ) & 1 );
}
return x;
}
uint8_t nr_dci_decoding_procedure(PHY_VARS_NR_UE *ue,
UE_nr_rxtx_proc_t *proc,
int16_t *pdcch_e_rx,
fapi_nr_dci_indication_t *dci_ind,
fapi_nr_dl_config_dci_dl_pdu_rel15_t *rel15) {
//int gNB_id = 0;
int16_t tmp_e[16*108];
rnti_t n_rnti;
int e_rx_cand_idx = 0;
for (int j=0;j<rel15->number_of_candidates;j++) {
int CCEind = rel15->CCE[j];
int L = rel15->L[j];
// Loop over possible DCI lengths
for (int k = 0; k < rel15->num_dci_options; k++) {
// skip this candidate if we've already found one with the
// same rnti and format at a different aggregation level
int dci_found=0;
for (int ind=0;ind < dci_ind->number_of_dcis ; ind++) {
if (rel15->rnti== dci_ind->dci_list[ind].rnti &&
rel15->dci_format_options[k]==dci_ind->dci_list[ind].dci_format) {
dci_found=1;
break;
}
}
if (dci_found==1) continue;
int dci_length = rel15->dci_length_options[k];
uint64_t dci_estimation[2]= {0};
LOG_D(PHY, "(%i.%i) Trying DCI candidate %d of %d number of candidates, CCE %d (%d), L %d, length %d, format %s\n",
proc->frame_rx, proc->nr_slot_rx, j, rel15->number_of_candidates, CCEind, e_rx_cand_idx, L, dci_length, nr_dci_format_string[rel15->dci_format_options[k]]);
nr_pdcch_unscrambling(&pdcch_e_rx[e_rx_cand_idx], rel15->coreset.scrambling_rnti, L*108, rel15->coreset.pdcch_dmrs_scrambling_id, tmp_e);
#ifdef DEBUG_DCI_DECODING
uint32_t *z = (uint32_t *) &e_rx[e_rx_cand_idx];
for (int index_z = 0; index_z < L*6; index_z++){
for (int i=0; i<9; i++) {
LOG_I(PHY,"z[%d]=(%d,%d) \n", (9*index_z + i), *(int16_t *) &z[9*index_z + i],*(1 + (int16_t *) &z[9*index_z + i]));
}
}
#endif
uint16_t crc = polar_decoder_int16(tmp_e,
dci_estimation,
1,
NR_POLAR_DCI_MESSAGE_TYPE, dci_length, L);
n_rnti = rel15->rnti;
LOG_D(PHY, "(%i.%i) dci indication (rnti %x,dci format %s,n_CCE %d,payloadSize %d,payload %llx )\n",
proc->frame_rx, proc->nr_slot_rx,n_rnti,nr_dci_format_string[rel15->dci_format_options[k]],CCEind,dci_length, *(unsigned long long*)dci_estimation);
if (crc == n_rnti) {
LOG_D(PHY, "(%i.%i) Received dci indication (rnti %x,dci format %s,n_CCE %d,payloadSize %d,payload %llx)\n",
proc->frame_rx, proc->nr_slot_rx,n_rnti,nr_dci_format_string[rel15->dci_format_options[k]],CCEind,dci_length,*(unsigned long long*)dci_estimation);
uint16_t mb = nr_dci_false_detection(dci_estimation,tmp_e,L*108,n_rnti, NR_POLAR_DCI_MESSAGE_TYPE, dci_length, L);
ue->dci_thres = (ue->dci_thres + mb) / 2;
if (mb > (ue->dci_thres+30)) {
LOG_W(PHY,"DCI false positive. Dropping DCI index %d. Mismatched bits: %d/%d. Current DCI threshold: %d\n",j,mb,L*108,ue->dci_thres);
continue;
}
else {
dci_ind->SFN = proc->frame_rx;
dci_ind->slot = proc->nr_slot_rx;
dci_ind->dci_list[dci_ind->number_of_dcis].rnti = n_rnti;
dci_ind->dci_list[dci_ind->number_of_dcis].n_CCE = CCEind;
dci_ind->dci_list[dci_ind->number_of_dcis].N_CCE = L;
dci_ind->dci_list[dci_ind->number_of_dcis].dci_format = rel15->dci_format_options[k];
dci_ind->dci_list[dci_ind->number_of_dcis].ss_type = rel15->dci_type_options[k];
int n_rb, rb_offset;
get_coreset_rballoc(rel15->coreset.frequency_domain_resource, &n_rb, &rb_offset);
dci_ind->dci_list[dci_ind->number_of_dcis].cset_start = rel15->BWPStart + rb_offset;
dci_ind->dci_list[dci_ind->number_of_dcis].payloadSize = dci_length;
memcpy((void*)dci_ind->dci_list[dci_ind->number_of_dcis].payloadBits,(void*)dci_estimation,8);
dci_ind->number_of_dcis++;
break; // If DCI is found, no need to check for remaining DCI lengths
}
} else {
LOG_D(PHY,"(%i.%i) Decoded crc %x does not match rnti %x for DCI format %d\n", proc->frame_rx, proc->nr_slot_rx, crc, n_rnti, rel15->dci_format_options[k]);
}
}
e_rx_cand_idx += 9*L*6*2; //e_rx index for next candidate (L CCEs, 6 REGs per CCE and 9 REs per REG and 2 uint16_t per RE)
}
return(dci_ind->number_of_dcis);
}
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