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optimization of NR ULSCH unscrambling

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This commit is contained in:
Raymond Knopp
2020-08-15 09:42:05 +02:00
parent 9b138dec72
commit b16b2f7d99
6 changed files with 84 additions and 17 deletions
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openair1/PHY/NR_REFSIG/nr_refsig.h
+1
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@@ -55,5 +55,6 @@ void init_scrambling_luts(void);
extern __m64 byte2m64_re[256];
extern __m64 byte2m64_im[256];
extern __m128i byte2m128i[256];
#endif
openair1/PHY/NR_REFSIG/scrambling_luts.c
+17 -1
View File
@@ -32,6 +32,8 @@
__m64 byte2m64_re[256];
__m64 byte2m64_im[256];
__m128i byte2m128i[256];
void init_byte2m64(void) {
for (int s=0;s<256;s++) {
@@ -54,10 +56,24 @@ void init_byte2m64(void) {
}
}
void init_byte2m128i(void) {
for (int s=0;s<256;s++) {
byte2m128i[s] = _mm_insert_epi16(byte2m128i[s],(1-2*(s&1)),0);
byte2m128i[s] = _mm_insert_epi16(byte2m128i[s],(1-2*((s>>1)&1)),1);
byte2m128i[s] = _mm_insert_epi16(byte2m128i[s],(1-2*((s>>2)&1)),2);
byte2m128i[s] = _mm_insert_epi16(byte2m128i[s],(1-2*((s>>3)&1)),3);
byte2m128i[s] = _mm_insert_epi16(byte2m128i[s],(1-2*((s>>4)&1)),4);
byte2m128i[s] = _mm_insert_epi16(byte2m128i[s],(1-2*((s>>5)&1)),5);
byte2m128i[s] = _mm_insert_epi16(byte2m128i[s],(1-2*((s>>6)&1)),6);
byte2m128i[s] = _mm_insert_epi16(byte2m128i[s],(1-2*((s>>7)&1)),7);
}
}
void init_scrambling_luts(void) {
init_byte2m64();
init_byte2m128i();
}
#endif
openair1/PHY/NR_TRANSPORT/nr_ulsch.c
+35 -1
View File
@@ -33,7 +33,7 @@
#include <stdint.h>
#include "PHY/NR_TRANSPORT/nr_transport_common_proto.h"
#include "PHY/NR_TRANSPORT/nr_ulsch.h"
#include "PHY/LTE_REFSIG/lte_refsig.h"
#include "PHY/NR_REFSIG/nr_refsig.h"
int16_t find_nr_ulsch(uint16_t rnti, PHY_VARS_gNB *gNB,find_type_t type) {
@@ -103,3 +103,37 @@ void nr_ulsch_unscrambling(int16_t* llr,
llr[i] = -llr[i];
}
}
void nr_ulsch_unscrambling_optim(int16_t* llr,
uint32_t size,
uint8_t q,
uint32_t Nid,
uint32_t n_RNTI) {
#if defined(__x86_64__) || defined(__i386__)
uint8_t reset;
uint32_t x1, x2, s=0;
x2 = (n_RNTI<<15) + Nid;
uint8_t *s8=(uint8_t *)&s;
__m128i *llr128 = (__m128i*)llr;
int j=0;
s = lte_gold_generic(&x1, &x2, 1);
for (int i=0; i<((size>>5)+((size&0x1f) > 0 ? 1 : 0)); i++,j+=4) {
llr128[j] = _mm_mullo_epi16(llr128[j],byte2m128i[s8[0]]);
llr128[j+1] = _mm_mullo_epi16(llr128[j+1],byte2m128i[s8[1]]);
llr128[j+2] = _mm_mullo_epi16(llr128[j+2],byte2m128i[s8[2]]);
llr128[j+3] = _mm_mullo_epi16(llr128[j+3],byte2m128i[s8[3]]);
s = lte_gold_generic(&x1, &x2, 0);
}
#else
nr_ulsch_unscrambling(llr,
size,
q,
Nid,
n_RNTI);
#endif
}
openair1/PHY/NR_TRANSPORT/pucch_rx.c
+7 -7
View File
@@ -50,7 +50,7 @@
#include "T.h"
//#define DEBUG_NR_PUCCH_RX 1
#define DEBUG_NR_PUCCH_RX 1
NR_gNB_PUCCH_t *new_gNB_pucch(void){
NR_gNB_PUCCH_t *pucch;
@@ -385,28 +385,28 @@ void nr_decode_pucch0(PHY_VARS_gNB *gNB,
uci_pdu->sr = calloc(1,sizeof(*uci_pdu->sr));
if (xrtmag_dB>(gNB->measurements.n0_power_tot_dB+gNB->pucch0_thres)) {
uci_pdu->sr->sr_indication = 1;
uci_pdu->sr->sr_confidence_level = xrtmag_dB-(gNB->measurements.n0_power_tot_dB+gNB->pucch0_thres);
uci_pdu->sr->sr_confidence_level = xrtmag_dB-(gNB->measurements.n0_power_tot_dB+11+gNB->pucch0_thres);
} else {
uci_pdu->sr->sr_indication = 0;
uci_pdu->sr->sr_confidence_level = (gNB->measurements.n0_power_tot_dB+gNB->pucch0_thres)-xrtmag_dB;
uci_pdu->sr->sr_confidence_level = (gNB->measurements.n0_power_tot_dB+11+gNB->pucch0_thres)-xrtmag_dB;
}
}
else if (pucch_pdu->bit_len_harq==1) {
uci_pdu->harq = calloc(1,sizeof(*uci_pdu->harq));
uci_pdu->harq->num_harq = 1;
uci_pdu->harq->harq_confidence_level = xrtmag_dB-(gNB->measurements.n0_power_tot_dB+gNB->pucch0_thres);
uci_pdu->harq->harq_confidence_level = xrtmag_dB-(gNB->measurements.n0_power_tot_dB+11+gNB->pucch0_thres);
uci_pdu->harq->harq_list = (nfapi_nr_harq_t*)malloc(1);
uci_pdu->harq->harq_list[0].harq_value = index&0x01;
if (pucch_pdu->sr_flag == 1) {
uci_pdu->sr = calloc(1,sizeof(*uci_pdu->sr));
uci_pdu->sr->sr_indication = (index>1) ? 1 : 0;
uci_pdu->sr->sr_confidence_level = xrtmag_dB-(gNB->measurements.n0_power_tot_dB+gNB->pucch0_thres);
uci_pdu->sr->sr_confidence_level = xrtmag_dB-(gNB->measurements.n0_power_tot_dB+11+gNB->pucch0_thres);
}
}
else {
uci_pdu->harq = calloc(1,sizeof(*uci_pdu->harq));
uci_pdu->harq->num_harq = 2;
uci_pdu->harq->harq_confidence_level = xrtmag_dB-(gNB->measurements.n0_power_tot_dB+gNB->pucch0_thres);
uci_pdu->harq->harq_confidence_level = xrtmag_dB-(gNB->measurements.n0_power_tot_dB+11+gNB->pucch0_thres);
uci_pdu->harq->harq_list = (nfapi_nr_harq_t*)malloc(2);
uci_pdu->harq->harq_list[1].harq_value = index&0x01;
@@ -415,7 +415,7 @@ void nr_decode_pucch0(PHY_VARS_gNB *gNB,
if (pucch_pdu->sr_flag == 1) {
uci_pdu->sr = calloc(1,sizeof(*uci_pdu->sr));
uci_pdu->sr->sr_indication = (index>3) ? 1 : 0;
uci_pdu->sr->sr_confidence_level = xrtmag_dB-(gNB->measurements.n0_power_tot_dB+gNB->pucch0_thres);
uci_pdu->sr->sr_confidence_level = xrtmag_dB-(gNB->measurements.n0_power_tot_dB+11+gNB->pucch0_thres);
}
}
}
openair1/SCHED_NR/phy_procedures_nr_gNB.c
+5 -5
View File
@@ -244,11 +244,11 @@ void nr_ulsch_procedures(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx, int ULSCH
//------------------- ULSCH unscrambling -------------------
//----------------------------------------------------------
start_meas(&gNB->ulsch_unscrambling_stats);
nr_ulsch_unscrambling(gNB->pusch_vars[ULSCH_id]->llr,
G,
0,
pusch_pdu->data_scrambling_id,
pusch_pdu->rnti);
nr_ulsch_unscrambling_optim(gNB->pusch_vars[ULSCH_id]->llr,
G,
0,
pusch_pdu->data_scrambling_id,
pusch_pdu->rnti);
stop_meas(&gNB->ulsch_unscrambling_stats);
//----------------------------------------------------------
//--------------------- ULSCH decoding ---------------------
openair1/SIMULATION/NR_PHY/pucchsim.c
+19 -3
View File
@@ -84,7 +84,7 @@ int main(int argc, char **argv)
uint8_t transmission_mode = 1,n_tx=1,n_rx=1;
uint16_t Nid_cell=0;
uint64_t SSB_positions=0x01;
channel_desc_t *gNB2UE;
channel_desc_t *UE2gNB;
int format=0;
//uint8_t extended_prefix_flag=0;
FILE *input_fd=NULL;
@@ -100,6 +100,8 @@ int main(int argc, char **argv)
uint16_t nrofPRB=2;
uint8_t timeDomainOCC=0;
SCM_t channel_model=AWGN;//Rayleigh1_anticorr;
double DS_TDL = .03;
int N_RB_DL=273,mu=1;
float target_error_rate=0.001;
@@ -162,6 +164,20 @@ int main(int argc, char **argv)
case 'G':
channel_model=ETU;
break;
case 'H':
channel_model = TDL_C;
DS_TDL = .030; // 30 ns
break;
case 'I':
channel_model = TDL_C;
DS_TDL = .3; // 300ns
break;
case 'J':
channel_model=TDL_D;
DS_TDL = .03;
break;
default:
printf("Unsupported channel model!\n");
@@ -402,9 +418,9 @@ int main(int argc, char **argv)
printf("FFO = %lf; IFO = %d\n",eps-IFO,IFO);
}
gNB2UE = new_channel_desc_scm(n_tx, n_rx, channel_model, fs, bw, 0, 0, 0);
UE2gNB = new_channel_desc_scm(n_tx, n_rx, channel_model, fs, bw, DS_TDL,0, 0, 0);
if (gNB2UE==NULL) {
if (UE2gNB==NULL) {
printf("Problem generating channel model. Exiting.\n");
exit(-1);
}