maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

created new directories for NBIoT and NR and split eNB/gNB/UE

Browse Source
This commit is contained in:
Raymond Knopp
2018-03-19 01:13:12 -07:00
parent d943cd281d
commit fe95f0f478
6 changed files with 7293 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/LTE_UE_TRANSPORT/dci_ue.c
Executable
+3681
View File
File diff suppressed because it is too large Load Diff
openair1/PHY/LTE_UE_TRANSPORT/pbch_ue.c
+631
View File
@@ -0,0 +1,631 @@
/*
* 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/pbch.c
* \brief Top-level routines for generating and decoding the PBCH/BCH physical/transport channel V8.6 2009-03
* \author R. Knopp, F. Kaltenberger
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr,florian.kaltenberger.fr
* \note
* \warning
*/
#include "PHY/defs.h"
#include "PHY/CODING/extern.h"
#include "PHY/CODING/lte_interleaver_inline.h"
#include "defs.h"
#include "extern.h"
#include "PHY/extern.h"
#include "PHY/sse_intrin.h"
//#define DEBUG_PBCH 1
//#define DEBUG_PBCH_ENCODING
//#define INTERFERENCE_MITIGATION 1
#define PBCH_A 24
uint16_t pbch_extract(int **rxdataF,
int **dl_ch_estimates,
int **rxdataF_ext,
int **dl_ch_estimates_ext,
uint32_t symbol,
uint32_t high_speed_flag,
LTE_DL_FRAME_PARMS *frame_parms)
{
uint16_t rb,nb_rb=6;
uint8_t i,j,aarx,aatx;
int *dl_ch0,*dl_ch0_ext,*rxF,*rxF_ext;
uint32_t nsymb = (frame_parms->Ncp==0) ? 7:6;
uint32_t symbol_mod = symbol % nsymb;
int rx_offset = frame_parms->ofdm_symbol_size-3*12;
int ch_offset = frame_parms->N_RB_DL*6-3*12;
int nushiftmod3 = frame_parms->nushift%3;
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
/*
printf("extract_rbs (nushift %d): symbol_mod=%d, rx_offset=%d, ch_offset=%d\n",frame_parms->nushift,symbol_mod,
(rx_offset + (symbol*(frame_parms->ofdm_symbol_size)))*2,
LTE_CE_OFFSET+ch_offset+(symbol_mod*(frame_parms->ofdm_symbol_size)));
*/
rxF = &rxdataF[aarx][(rx_offset + (symbol*(frame_parms->ofdm_symbol_size)))];
rxF_ext = &rxdataF_ext[aarx][symbol_mod*(6*12)];
for (rb=0; rb<nb_rb; rb++) {
// skip DC carrier
if (rb==3) {
rxF = &rxdataF[aarx][(1 + (symbol*(frame_parms->ofdm_symbol_size)))];
}
if ((symbol_mod==0) || (symbol_mod==1)) {
j=0;
for (i=0; i<12; i++) {
if ((i!=nushiftmod3) &&
(i!=(nushiftmod3+3)) &&
(i!=(nushiftmod3+6)) &&
(i!=(nushiftmod3+9))) {
rxF_ext[j++]=rxF[i];
}
}
rxF+=12;
rxF_ext+=8;
} else {
for (i=0; i<12; i++) {
rxF_ext[i]=rxF[i];
}
rxF+=12;
rxF_ext+=12;
}
}
for (aatx=0; aatx<4; aatx++) { //frame_parms->nb_antenna_ports_eNB;aatx++) {
if (high_speed_flag == 1)
dl_ch0 = &dl_ch_estimates[(aatx<<1)+aarx][LTE_CE_OFFSET+ch_offset+(symbol*(frame_parms->ofdm_symbol_size))];
else
dl_ch0 = &dl_ch_estimates[(aatx<<1)+aarx][LTE_CE_OFFSET+ch_offset];
dl_ch0_ext = &dl_ch_estimates_ext[(aatx<<1)+aarx][symbol_mod*(6*12)];
for (rb=0; rb<nb_rb; rb++) {
// skip DC carrier
// if (rb==3) dl_ch0++;
if (symbol_mod>1) {
memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int));
dl_ch0+=12;
dl_ch0_ext+=12;
} else {
j=0;
for (i=0; i<12; i++) {
if ((i!=nushiftmod3) &&
(i!=(nushiftmod3+3)) &&
(i!=(nushiftmod3+6)) &&
(i!=(nushiftmod3+9))) {
// printf("PBCH extract i %d j %d => (%d,%d)\n",i,j,*(short *)&dl_ch0[i],*(1+(short*)&dl_ch0[i]));
dl_ch0_ext[j++]=dl_ch0[i];
}
}
dl_ch0+=12;
dl_ch0_ext+=8;
}
}
} //tx antenna loop
}
return(0);
}
//__m128i avg128;
//compute average channel_level on each (TX,RX) antenna pair
int pbch_channel_level(int **dl_ch_estimates_ext,
LTE_DL_FRAME_PARMS *frame_parms,
uint32_t symbol)
{
int16_t rb, nb_rb=6;
uint8_t aatx,aarx;
#if defined(__x86_64__) || defined(__i386__)
__m128i avg128;
__m128i *dl_ch128;
#elif defined(__arm__)
int32x4_t avg128;
int16x8_t *dl_ch128;
#endif
int avg1=0,avg2=0;
uint32_t nsymb = (frame_parms->Ncp==0) ? 7:6;
uint32_t symbol_mod = symbol % nsymb;
for (aatx=0; aatx<4; aatx++) //frame_parms->nb_antenna_ports_eNB;aatx++)
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
//clear average level
#if defined(__x86_64__) || defined(__i386__)
avg128 = _mm_setzero_si128();
dl_ch128=(__m128i *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol_mod*6*12];
#elif defined(__arm__)
avg128 = vdupq_n_s32(0);
dl_ch128=(int16x8_t *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol_mod*6*12];
#endif
for (rb=0; rb<nb_rb; rb++) {
#if defined(__x86_64__) || defined(__i386__)
avg128 = _mm_add_epi32(avg128,_mm_madd_epi16(dl_ch128[0],dl_ch128[0]));
avg128 = _mm_add_epi32(avg128,_mm_madd_epi16(dl_ch128[1],dl_ch128[1]));
avg128 = _mm_add_epi32(avg128,_mm_madd_epi16(dl_ch128[2],dl_ch128[2]));
#elif defined(__arm__)
// to be filled in
#endif
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]);
}
*/
}
avg1 = (((int*)&avg128)[0] +
((int*)&avg128)[1] +
((int*)&avg128)[2] +
((int*)&avg128)[3])/(nb_rb*12);
if (avg1>avg2)
avg2 = avg1;
//msg("Channel level : %d, %d\n",avg1, avg2);
}
#if defined(__x86_64__) || defined(__i386__)
_mm_empty();
_m_empty();
#endif
return(avg2);
}
#if defined(__x86_64__) || defined(__i386__)
__m128i mmtmpP0,mmtmpP1,mmtmpP2,mmtmpP3;
#elif defined(__arm__)
int16x8_t mmtmpP0,mmtmpP1,mmtmpP2,mmtmpP3;
#endif
void pbch_channel_compensation(int **rxdataF_ext,
int **dl_ch_estimates_ext,
int **rxdataF_comp,
LTE_DL_FRAME_PARMS *frame_parms,
uint8_t symbol,
uint8_t output_shift)
{
uint16_t rb,nb_rb=6;
uint8_t aatx,aarx,symbol_mod;
#if defined(__x86_64__) || defined(__i386__)
__m128i *dl_ch128,*rxdataF128,*rxdataF_comp128;
#elif defined(__arm__)
#endif
symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
for (aatx=0; aatx<4; aatx++) //frame_parms->nb_antenna_ports_eNB;aatx++)
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
#if defined(__x86_64__) || defined(__i386__)
dl_ch128 = (__m128i *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol_mod*6*12];
rxdataF128 = (__m128i *)&rxdataF_ext[aarx][symbol_mod*6*12];
rxdataF_comp128 = (__m128i *)&rxdataF_comp[(aatx<<1)+aarx][symbol_mod*6*12];
#elif defined(__arm__)
// to be filled in
#endif
for (rb=0; rb<nb_rb; rb++) {
//printf("rb %d\n",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:",rxdataF128);
// print_shorts("ch:",dl_ch128);
// print_shorts("pack:",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);
if (symbol_mod>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);
dl_ch128+=3;
rxdataF128+=3;
rxdataF_comp128+=3;
} else {
dl_ch128+=2;
rxdataF128+=2;
rxdataF_comp128+=2;
}
#elif defined(__arm__)
// to be filled in
#endif
}
}
#if defined(__x86_64__) || defined(__i386__)
_mm_empty();
_m_empty();
#endif
}
void pbch_detection_mrc(LTE_DL_FRAME_PARMS *frame_parms,
int **rxdataF_comp,
uint8_t symbol)
{
uint8_t aatx, symbol_mod;
int i, nb_rb=6;
#if defined(__x86_64__) || defined(__i386__)
__m128i *rxdataF_comp128_0,*rxdataF_comp128_1;
#elif defined(__arm__)
int16x8_t *rxdataF_comp128_0,*rxdataF_comp128_1;
#endif
symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
if (frame_parms->nb_antennas_rx>1) {
for (aatx=0; aatx<4; aatx++) { //frame_parms->nb_antenna_ports_eNB;aatx++) {
#if defined(__x86_64__) || defined(__i386__)
rxdataF_comp128_0 = (__m128i *)&rxdataF_comp[(aatx<<1)][symbol_mod*6*12];
rxdataF_comp128_1 = (__m128i *)&rxdataF_comp[(aatx<<1)+1][symbol_mod*6*12];
#elif defined(__arm__)
rxdataF_comp128_0 = (int16x8_t *)&rxdataF_comp[(aatx<<1)][symbol_mod*6*12];
rxdataF_comp128_1 = (int16x8_t *)&rxdataF_comp[(aatx<<1)+1][symbol_mod*6*12];
#endif
// MRC on each re of rb, both on MF output and magnitude (for 16QAM/64QAM llr computation)
for (i=0; i<nb_rb*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__)
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
}
void pbch_unscrambling(LTE_DL_FRAME_PARMS *frame_parms,
int8_t* llr,
uint32_t length,
uint8_t frame_mod4)
{
int i;
uint8_t reset;
uint32_t x1, x2, s=0;
reset = 1;
// x1 is set in first call to lte_gold_generic
x2 = frame_parms->Nid_cell; //this is c_init in 36.211 Sec 6.6.1
// msg("pbch_unscrambling: Nid_cell = %d\n",x2);
for (i=0; i<length; i++) {
if (i%32==0) {
s = lte_gold_generic(&x1, &x2, reset);
// printf("lte_gold[%d]=%x\n",i,s);
reset = 0;
}
// take the quarter of the PBCH that corresponds to this frame
if ((i>=(frame_mod4*(length>>2))) && (i<((1+frame_mod4)*(length>>2)))) {
if (((s>>(i%32))&1)==0)
llr[i] = -llr[i];
}
}
}
void pbch_alamouti(LTE_DL_FRAME_PARMS *frame_parms,
int **rxdataF_comp,
uint8_t symbol)
{
int16_t *rxF0,*rxF1;
// __m128i *ch_mag0,*ch_mag1,*ch_mag0b,*ch_mag1b;
uint8_t rb,re,symbol_mod;
int jj;
// printf("Doing alamouti\n");
symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
jj = (symbol_mod*6*12);
rxF0 = (int16_t*)&rxdataF_comp[0][jj]; //tx antenna 0 h0*y
rxF1 = (int16_t*)&rxdataF_comp[2][jj]; //tx antenna 1 h1*y
for (rb=0; rb<6; rb++) {
for (re=0; re<12; re+=2) {
// Alamouti RX combining
rxF0[0] = rxF0[0] + rxF1[2];
rxF0[1] = rxF0[1] - rxF1[3];
rxF0[2] = rxF0[2] - rxF1[0];
rxF0[3] = rxF0[3] + rxF1[1];
rxF0+=4;
rxF1+=4;
}
}
}
void pbch_quantize(int8_t *pbch_llr8,
int16_t *pbch_llr,
uint16_t len)
{
uint16_t i;
for (i=0; i<len; i++) {
if (pbch_llr[i]>7)
pbch_llr8[i]=7;
else if (pbch_llr[i]<-8)
pbch_llr8[i]=-8;
else
pbch_llr8[i] = (char)(pbch_llr[i]);
}
}
static unsigned char dummy_w_rx[3*3*(16+PBCH_A)];
static int8_t pbch_w_rx[3*3*(16+PBCH_A)],pbch_d_rx[96+(3*(16+PBCH_A))];
uint16_t rx_pbch(LTE_UE_COMMON *lte_ue_common_vars,
LTE_UE_PBCH *lte_ue_pbch_vars,
LTE_DL_FRAME_PARMS *frame_parms,
uint8_t eNB_id,
MIMO_mode_t mimo_mode,
uint32_t high_speed_flag,
uint8_t frame_mod4)
{
uint8_t log2_maxh;//,aatx,aarx;
int max_h=0;
int symbol,i;
uint32_t nsymb = (frame_parms->Ncp==0) ? 14:12;
uint16_t pbch_E;
uint8_t pbch_a[8];
uint8_t RCC;
int8_t *pbch_e_rx;
uint8_t *decoded_output = lte_ue_pbch_vars->decoded_output;
uint16_t crc;
// pbch_D = 16+PBCH_A;
pbch_E = (frame_parms->Ncp==0) ? 1920 : 1728; //RE/RB * #RB * bits/RB (QPSK)
pbch_e_rx = &lte_ue_pbch_vars->llr[frame_mod4*(pbch_E>>2)];
#ifdef DEBUG_PBCH
LOG_D(PHY,"[PBCH] starting symbol loop (Ncp %d, frame_mod4 %d,mimo_mode %d\n",frame_parms->Ncp,frame_mod4,mimo_mode);
#endif
// clear LLR buffer
memset(lte_ue_pbch_vars->llr,0,pbch_E);
for (symbol=(nsymb>>1); symbol<(nsymb>>1)+4; symbol++) {
#ifdef DEBUG_PBCH
LOG_D(PHY,"[PBCH] starting extract\n");
#endif
pbch_extract(lte_ue_common_vars->common_vars_rx_data_per_thread[0].rxdataF,
lte_ue_common_vars->common_vars_rx_data_per_thread[0].dl_ch_estimates[eNB_id],
lte_ue_pbch_vars->rxdataF_ext,
lte_ue_pbch_vars->dl_ch_estimates_ext,
symbol,
high_speed_flag,
frame_parms);
#ifdef DEBUG_PBCH
LOG_D(PHY,"[PHY] PBCH Symbol %d\n",symbol);
LOG_D(PHY,"[PHY] PBCH starting channel_level\n");
#endif
max_h = pbch_channel_level(lte_ue_pbch_vars->dl_ch_estimates_ext,
frame_parms,
symbol);
log2_maxh = 3+(log2_approx(max_h)/2);
#ifdef DEBUG_PBCH
LOG_D(PHY,"[PHY] PBCH log2_maxh = %d (%d)\n",log2_maxh,max_h);
#endif
pbch_channel_compensation(lte_ue_pbch_vars->rxdataF_ext,
lte_ue_pbch_vars->dl_ch_estimates_ext,
lte_ue_pbch_vars->rxdataF_comp,
frame_parms,
symbol,
log2_maxh); // log2_maxh+I0_shift
if (frame_parms->nb_antennas_rx > 1)
pbch_detection_mrc(frame_parms,
lte_ue_pbch_vars->rxdataF_comp,
symbol);
if (mimo_mode == ALAMOUTI) {
pbch_alamouti(frame_parms,lte_ue_pbch_vars->rxdataF_comp,symbol);
} else if (mimo_mode != SISO) {
LOG_D(PHY,"[PBCH][RX] Unsupported MIMO mode\n");
return(-1);
}
if (symbol>(nsymb>>1)+1) {
pbch_quantize(pbch_e_rx,
(short*)&(lte_ue_pbch_vars->rxdataF_comp[0][(symbol%(nsymb>>1))*72]),
144);
pbch_e_rx+=144;
} else {
pbch_quantize(pbch_e_rx,
(short*)&(lte_ue_pbch_vars->rxdataF_comp[0][(symbol%(nsymb>>1))*72]),
96);
pbch_e_rx+=96;
}
}
pbch_e_rx = lte_ue_pbch_vars->llr;
//un-scrambling
#ifdef DEBUG_PBCH
LOG_D(PHY,"[PBCH] doing unscrambling\n");
#endif
pbch_unscrambling(frame_parms,
pbch_e_rx,
pbch_E,
frame_mod4);
//un-rate matching
#ifdef DEBUG_PBCH
LOG_D(PHY,"[PBCH] doing un-rate-matching\n");
#endif
memset(dummy_w_rx,0,3*3*(16+PBCH_A));
RCC = generate_dummy_w_cc(16+PBCH_A,
dummy_w_rx);
lte_rate_matching_cc_rx(RCC,pbch_E,pbch_w_rx,dummy_w_rx,pbch_e_rx);
sub_block_deinterleaving_cc((unsigned int)(PBCH_A+16),
&pbch_d_rx[96],
&pbch_w_rx[0]);
memset(pbch_a,0,((16+PBCH_A)>>3));
phy_viterbi_lte_sse2(pbch_d_rx+96,pbch_a,16+PBCH_A);
// Fix byte endian of PBCH (bit 23 goes in first)
for (i=0; i<(PBCH_A>>3); i++)
decoded_output[(PBCH_A>>3)-i-1] = pbch_a[i];
#ifdef DEBUG_PBCH
for (i=0; i<(PBCH_A>>3); i++)
LOG_I(PHY,"[PBCH] pbch_a[%d] = %x\n",i,decoded_output[i]);
#endif //DEBUG_PBCH
#ifdef DEBUG_PBCH
LOG_I(PHY,"PBCH CRC %x : %x\n",
crc16(pbch_a,PBCH_A),
((uint16_t)pbch_a[PBCH_A>>3]<<8)+pbch_a[(PBCH_A>>3)+1]);
#endif
crc = (crc16(pbch_a,PBCH_A)>>16) ^
(((uint16_t)pbch_a[PBCH_A>>3]<<8)+pbch_a[(PBCH_A>>3)+1]);
if (crc == 0x0000)
return(1);
else if (crc == 0xffff)
return(2);
else if (crc == 0x5555)
return(4);
else
return(-1);
}
openair1/PHY/LTE_UE_TRANSPORT/pcfich_ue.c
+312
View File
@@ -0,0 +1,312 @@
/*
* 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/pcfich.c
* \brief Top-level routines for generating and decoding the PCFICH/CFI physical/transport channel V8.6 2009-03
* \author R. Knopp
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr
* \note
* \warning
*/
#include "PHY/defs.h"
//#define DEBUG_PCFICH
void generate_pcfich_reg_mapping(LTE_DL_FRAME_PARMS *frame_parms)
{
uint16_t kbar = 6 * (frame_parms->Nid_cell %(2*frame_parms->N_RB_DL));
uint16_t first_reg;
uint16_t *pcfich_reg = frame_parms->pcfich_reg;
pcfich_reg[0] = kbar/6;
first_reg = pcfich_reg[0];
frame_parms->pcfich_first_reg_idx=0;
pcfich_reg[1] = ((kbar + (frame_parms->N_RB_DL>>1)*6)%(frame_parms->N_RB_DL*12))/6;
if (pcfich_reg[1] < pcfich_reg[0]) {
frame_parms->pcfich_first_reg_idx = 1;
first_reg = pcfich_reg[1];
}
pcfich_reg[2] = ((kbar + (frame_parms->N_RB_DL)*6)%(frame_parms->N_RB_DL*12))/6;
if (pcfich_reg[2] < first_reg) {
frame_parms->pcfich_first_reg_idx = 2;
first_reg = pcfich_reg[2];
}
pcfich_reg[3] = ((kbar + ((3*frame_parms->N_RB_DL)>>1)*6)%(frame_parms->N_RB_DL*12))/6;
if (pcfich_reg[3] < first_reg) {
frame_parms->pcfich_first_reg_idx = 3;
first_reg = pcfich_reg[3];
}
//#ifdef DEBUG_PCFICH
printf("pcfich_reg : %d,%d,%d,%d\n",pcfich_reg[0],pcfich_reg[1],pcfich_reg[2],pcfich_reg[3]);
//#endif
}
void pcfich_scrambling(LTE_DL_FRAME_PARMS *frame_parms,
uint8_t subframe,
uint8_t *b,
uint8_t *bt)
{
uint32_t i;
uint8_t reset;
uint32_t x1, x2, s=0;
reset = 1;
// x1 is set in lte_gold_generic
x2 = ((((2*frame_parms->Nid_cell)+1)*(1+subframe))<<9) + frame_parms->Nid_cell; //this is c_init in 36.211 Sec 6.7.1
for (i=0; i<32; i++) {
if ((i&0x1f)==0) {
s = lte_gold_generic(&x1, &x2, reset);
//printf("lte_gold[%d]=%x\n",i,s);
reset = 0;
}
bt[i] = (b[i]&1) ^ ((s>>(i&0x1f))&1);
}
}
void pcfich_unscrambling(LTE_DL_FRAME_PARMS *frame_parms,
uint8_t subframe,
int16_t *d)
{
uint32_t i;
uint8_t reset;
uint32_t x1, x2, s=0;
reset = 1;
// x1 is set in lte_gold_generic
x2 = ((((2*frame_parms->Nid_cell)+1)*(1+subframe))<<9) + frame_parms->Nid_cell; //this is c_init in 36.211 Sec 6.7.1
for (i=0; i<32; i++) {
if ((i&0x1f)==0) {
s = lte_gold_generic(&x1, &x2, reset);
//printf("lte_gold[%d]=%x\n",i,s);
reset = 0;
}
if (((s>>(i&0x1f))&1) == 1)
d[i]=-d[i];
}
}
uint8_t pcfich_b[4][32]= {{0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1},
{1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0},
{1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
};
void generate_pcfich(uint8_t num_pdcch_symbols,
int16_t amp,
LTE_DL_FRAME_PARMS *frame_parms,
int32_t **txdataF,
uint8_t subframe)
{
uint8_t pcfich_bt[32],nsymb,pcfich_quad;
int32_t pcfich_d[2][16];
uint8_t i;
uint32_t symbol_offset,m,re_offset,reg_offset;
int16_t gain_lin_QPSK;
uint16_t *pcfich_reg = frame_parms->pcfich_reg;
int nushiftmod3 = frame_parms->nushift%3;
#ifdef DEBUG_PCFICH
LOG_D(PHY,"Generating PCFICH in subfrmae %d for %d PDCCH symbols, AMP %d, p %d, Ncp %d\n",
subframe,num_pdcch_symbols,amp,frame_parms->nb_antenna_ports_eNB,frame_parms->Ncp);
#endif
// scrambling
if ((num_pdcch_symbols>0) && (num_pdcch_symbols<4))
pcfich_scrambling(frame_parms,subframe,pcfich_b[num_pdcch_symbols-1],pcfich_bt);
// modulation
if (frame_parms->nb_antenna_ports_eNB==1)
gain_lin_QPSK = (int16_t)((amp*ONE_OVER_SQRT2_Q15)>>15);
else
gain_lin_QPSK = amp/2;
if (frame_parms->nb_antenna_ports_eNB==1) { // SISO
for (i=0; i<16; i++) {
((int16_t*)(&(pcfich_d[0][i])))[0] = ((pcfich_bt[2*i] == 1) ? -gain_lin_QPSK : gain_lin_QPSK);
((int16_t*)(&(pcfich_d[1][i])))[0] = ((pcfich_bt[2*i] == 1) ? -gain_lin_QPSK : gain_lin_QPSK);
((int16_t*)(&(pcfich_d[0][i])))[1] = ((pcfich_bt[2*i+1] == 1) ? -gain_lin_QPSK : gain_lin_QPSK);
((int16_t*)(&(pcfich_d[1][i])))[1] = ((pcfich_bt[2*i+1] == 1) ? -gain_lin_QPSK : gain_lin_QPSK);
}
} else { // ALAMOUTI
for (i=0; i<16; i+=2) {
// first antenna position n -> x0
((int16_t*)(&(pcfich_d[0][i])))[0] = ((pcfich_bt[2*i] == 1) ? -gain_lin_QPSK : gain_lin_QPSK);
((int16_t*)(&(pcfich_d[0][i])))[1] = ((pcfich_bt[2*i+1] == 1) ? -gain_lin_QPSK : gain_lin_QPSK);
// second antenna position n -> -x1*
((int16_t*)(&(pcfich_d[1][i])))[0] = ((pcfich_bt[2*i+2] == 1) ? gain_lin_QPSK : -gain_lin_QPSK);
((int16_t*)(&(pcfich_d[1][i])))[1] = ((pcfich_bt[2*i+3] == 1) ? -gain_lin_QPSK : gain_lin_QPSK);
// fill in the rest of the ALAMOUTI precoding
((int16_t*)&pcfich_d[0][i+1])[0] = -((int16_t*)&pcfich_d[1][i])[0];
((int16_t*)&pcfich_d[0][i+1])[1] = ((int16_t*)&pcfich_d[1][i])[1];
((int16_t*)&pcfich_d[1][i+1])[0] = ((int16_t*)&pcfich_d[0][i])[0];
((int16_t*)&pcfich_d[1][i+1])[1] = -((int16_t*)&pcfich_d[0][i])[1];
}
}
// mapping
nsymb = (frame_parms->Ncp==0) ? 14:12;
symbol_offset = (uint32_t)frame_parms->ofdm_symbol_size*(subframe*nsymb);
re_offset = frame_parms->first_carrier_offset;
// loop over 4 quadruplets and lookup REGs
m=0;
for (pcfich_quad=0; pcfich_quad<4; pcfich_quad++) {
reg_offset = re_offset+((uint16_t)pcfich_reg[pcfich_quad]*6);
if (reg_offset>=frame_parms->ofdm_symbol_size)
reg_offset=1 + reg_offset-frame_parms->ofdm_symbol_size;
for (i=0; i<6; i++) {
if ((i!=nushiftmod3)&&(i!=(nushiftmod3+3))) {
txdataF[0][symbol_offset+reg_offset+i] = pcfich_d[0][m];
if (frame_parms->nb_antenna_ports_eNB>1)
txdataF[1][symbol_offset+reg_offset+i] = pcfich_d[1][m];
m++;
}
}
}
}
uint8_t rx_pcfich(LTE_DL_FRAME_PARMS *frame_parms,
uint8_t subframe,
LTE_UE_PDCCH *lte_ue_pdcch_vars,
MIMO_mode_t mimo_mode)
{
uint8_t pcfich_quad;
uint8_t i,j;
uint16_t reg_offset;
int32_t **rxdataF_comp = lte_ue_pdcch_vars->rxdataF_comp;
int16_t pcfich_d[32],*pcfich_d_ptr;
int32_t metric,old_metric=-16384;
uint8_t num_pdcch_symbols=3;
uint16_t *pcfich_reg = frame_parms->pcfich_reg;
// demapping
// loop over 4 quadruplets and lookup REGs
// m=0;
pcfich_d_ptr = pcfich_d;
for (pcfich_quad=0; pcfich_quad<4; pcfich_quad++) {
reg_offset = (pcfich_reg[pcfich_quad]*4);
for (i=0; i<4; i++) {
pcfich_d_ptr[0] = ((int16_t*)&rxdataF_comp[0][reg_offset+i])[0]; // RE component
pcfich_d_ptr[1] = ((int16_t*)&rxdataF_comp[0][reg_offset+i])[1]; // IM component
#ifdef DEBUG_PCFICH
printf("rx_pcfich: quad %d, i %d, offset %d => (%d,%d) => pcfich_d_ptr[0] %d \n",pcfich_quad,i,reg_offset+i,
((int16_t*)&rxdataF_comp[0][reg_offset+i])[0],
((int16_t*)&rxdataF_comp[0][reg_offset+i])[1],
pcfich_d_ptr[0]);
#endif
pcfich_d_ptr+=2;
}
/*
}
else { // ALAMOUTI
for (i=0;i<4;i+=2) {
pcfich_d_ptr[0] = 0;
pcfich_d_ptr[1] = 0;
pcfich_d_ptr[2] = 0;
pcfich_d_ptr[3] = 0;
for (j=0;j<frame_parms->nb_antennas_rx;j++) {
pcfich_d_ptr[0] += (((int16_t*)&rxdataF_comp[j][reg_offset+i])[0]+
((int16_t*)&rxdataF_comp[j+2][reg_offset+i+1])[0]); // RE component
pcfich_d_ptr[1] += (((int16_t*)&rxdataF_comp[j][reg_offset+i])[1] -
((int16_t*)&rxdataF_comp[j+2][reg_offset+i+1])[1]);// IM component
pcfich_d_ptr[2] += (((int16_t*)&rxdataF_comp[j][reg_offset+i+1])[0]-
((int16_t*)&rxdataF_comp[j+2][reg_offset+i])[0]); // RE component
pcfich_d_ptr[3] += (((int16_t*)&rxdataF_comp[j][reg_offset+i+1])[1] +
((int16_t*)&rxdataF_comp[j+2][reg_offset+i])[1]);// IM component
}
pcfich_d_ptr+=4;
}
*/
}
// pcfhich unscrambling
pcfich_unscrambling(frame_parms,subframe,pcfich_d);
// pcfich detection
for (i=0; i<3; i++) {
metric = 0;
for (j=0; j<32; j++) {
// printf("pcfich_b[%d][%d] %d => pcfich_d[%d] %d\n",i,j,pcfich_b[i][j],j,pcfich_d[j]);
metric += (int32_t)(((pcfich_b[i][j]==0) ? (pcfich_d[j]) : (-pcfich_d[j])));
}
#ifdef DEBUG_PCFICH
printf("metric %d : %d\n",i,metric);
#endif
if (metric > old_metric) {
num_pdcch_symbols = 1+i;
old_metric = metric;
}
}
#ifdef DEBUG_PCFICH
printf("[PHY] PCFICH detected for %d PDCCH symbols\n",num_pdcch_symbols);
#endif
return(num_pdcch_symbols);
}
openair1/PHY/LTE_UE_TRANSPORT/pch_ue.c
+54
View File
@@ -0,0 +1,54 @@
/*
* 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 "PHY/defs.h"
#include "PHY/extern.h"
#include "assertions.h"
const unsigned int Ttab[4] = {32,64,128,256};
// This function implements the initialization of paging parameters for UE (See Section 7, 36.304)
// It must be called after setting IMSImod1024 during UE startup and after receiving SIB2
int init_ue_paging_info(PHY_VARS_UE *ue, long defaultPagingCycle, long nB) {
LTE_DL_FRAME_PARMS *fp = &ue->frame_parms;
unsigned int T = Ttab[defaultPagingCycle];
unsigned int N = (nB<=2) ? T : (T>>(nB-2));
unsigned int Ns = (nB<2) ? (1<<(2-nB)) : 1;
unsigned int UE_ID = ue->IMSImod1024;
unsigned int i_s = (UE_ID/N)%Ns;
ue->PF = (T/N) * (UE_ID % N);
// This implements Section 7.2 from 36.304
if (Ns==1)
ue->PO = (fp->frame_type==FDD) ? 9 : 0;
else if (Ns==2)
ue->PO = (fp->frame_type==FDD) ? (4+(5*i_s)) : (5*i_s);
else if (Ns==4)
ue->PO = (fp->frame_type==FDD) ? (4*(i_s&1)+(5*(i_s>>1))) : ((i_s&1)+(5*(i_s>>1)));
else
AssertFatal(1==0,"init_ue_paging_info: Ns is %d\n",Ns);
return(0);
}
openair1/PHY/LTE_UE_TRANSPORT/phich_ue.c
+1570
View File
File diff suppressed because it is too large Load Diff
openair1/PHY/LTE_UE_TRANSPORT/pmch_ue.c
+1045
View File
File diff suppressed because it is too large Load Diff