dci.c 124 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
/*! \file PHY/LTE_TRANSPORT/dci.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
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr
* \note
* \warning
*/
#ifdef USER_MODE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#endif
#include "PHY/defs.h"
#include "PHY/extern.h"
#include "SCHED/defs.h"
19
#include "SIMULATION/TOOLS/defs.h" // for taus 
20
#include "PHY/sse_intrin.h"
21

22
#include "assertions.h" 
23 24 25 26

//#define DEBUG_DCI_ENCODING 1
//#define DEBUG_DCI_DECODING 1
//#define DEBUG_PHY
27

28 29
//#undef ALL_AGGREGATION

30 31
//extern uint16_t phich_reg[MAX_NUM_PHICH_GROUPS][3];
//extern uint16_t pcfich_reg[4];
32

33 34
uint32_t check_phich_reg(LTE_DL_FRAME_PARMS *frame_parms,uint32_t kprime,uint8_t lprime,uint8_t mi)
{
35

36 37 38 39
  uint16_t i;
  uint16_t Ngroup_PHICH = (frame_parms->phich_config_common.phich_resource*frame_parms->N_RB_DL)/48;
  uint16_t mprime;
  uint16_t *pcfich_reg = frame_parms->pcfich_reg;
40 41 42 43 44 45 46 47 48 49 50 51 52 53

  if ((lprime>0) && (frame_parms->Ncp==0) )
    return(0);

  //  printf("check_phich_reg : mi %d\n",mi);

  // compute REG based on symbol
  if ((lprime == 0)||
      ((lprime==1)&&(frame_parms->nb_antennas_tx_eNB == 4)))
    mprime = kprime/6;
  else
    mprime = kprime>>2;

  // check if PCFICH uses mprime
54
  if ((lprime==0) &&
55 56 57 58 59
      ((mprime == pcfich_reg[0]) ||
       (mprime == pcfich_reg[1]) ||
       (mprime == pcfich_reg[2]) ||
       (mprime == pcfich_reg[3]))) {
#ifdef DEBUG_DCI_ENCODING
60
    printf("[PHY] REG %d allocated to PCFICH\n",mprime);
61 62 63 64 65 66 67 68 69 70
#endif
    return(1);
  }

  // handle Special subframe case for TDD !!!

  //  printf("Checking phich_reg %d\n",mprime);
  if (mi > 0) {
    if (((frame_parms->phich_config_common.phich_resource*frame_parms->N_RB_DL)%48) > 0)
      Ngroup_PHICH++;
71

72 73 74
    if (frame_parms->Ncp == 1) {
      Ngroup_PHICH<<=1;
    }
75 76 77 78 79 80 81



    for (i=0; i<Ngroup_PHICH; i++) {
      if ((mprime == frame_parms->phich_reg[i][0]) ||
          (mprime == frame_parms->phich_reg[i][1]) ||
          (mprime == frame_parms->phich_reg[i][2]))  {
82
#ifdef DEBUG_DCI_ENCODING
83
        printf("[PHY] REG %d (lprime %d) allocated to PHICH\n",mprime,lprime);
84
#endif
85
        return(1);
86 87 88
      }
    }
  }
89

90 91 92
  return(0);
}

93 94
uint16_t extract_crc(uint8_t *dci,uint8_t dci_len)
{
95

96 97
  uint16_t crc16;
  //  uint8_t i;
98 99

  /*
100 101
  uint8_t crc;
  crc = ((uint16_t *)dci)[DCI_LENGTH>>4];
102 103 104
  printf("crc1: %x, shift %d (DCI_LENGTH %d)\n",crc,DCI_LENGTH&0xf,DCI_LENGTH);
  crc = (crc>>(DCI_LENGTH&0xf));
  // clear crc bits
105 106 107
  ((uint16_t *)dci)[DCI_LENGTH>>4] &= (0xffff>>(16-(DCI_LENGTH&0xf)));
  printf("crc2: %x, dci0 %x\n",crc,((int16_t *)dci)[DCI_LENGTH>>4]);
  crc |= (((uint16_t *)dci)[1+(DCI_LENGTH>>4)])<<(16-(DCI_LENGTH&0xf));
108
  // clear crc bits
109
  (((uint16_t *)dci)[1+(DCI_LENGTH>>4)]) = 0;
110 111
  printf("extract_crc: crc %x\n",crc);
  */
112
#ifdef DEBUG_DCI_DECODING
113
  LOG_I(PHY,"dci_crc (%x,%x,%x), dci_len&0x7=%d\n",dci[dci_len>>3],dci[1+(dci_len>>3)],dci[2+(dci_len>>3)],
114
      dci_len&0x7);
115
#endif
116

117
  if ((dci_len&0x7) > 0) {
118 119
    ((uint8_t *)&crc16)[0] = dci[1+(dci_len>>3)]<<(dci_len&0x7) | dci[2+(dci_len>>3)]>>(8-(dci_len&0x7));
    ((uint8_t *)&crc16)[1] = dci[(dci_len>>3)]<<(dci_len&0x7) | dci[1+(dci_len>>3)]>>(8-(dci_len&0x7));
120
  } else {
121 122
    ((uint8_t *)&crc16)[0] = dci[1+(dci_len>>3)];
    ((uint8_t *)&crc16)[1] = dci[(dci_len>>3)];
123 124
  }

125
#ifdef DEBUG_DCI_DECODING
126
  LOG_I(PHY,"dci_crc =>%x\n",crc16);
127 128 129 130 131
#endif

  //  dci[(dci_len>>3)]&=(0xffff<<(dci_len&0xf));
  //  dci[(dci_len>>3)+1] = 0;
  //  dci[(dci_len>>3)+2] = 0;
132
  return((uint16_t)crc16);
133
  
134 135 136 137
}



138 139
static uint8_t d[3*(MAX_DCI_SIZE_BITS + 16) + 96];
static uint8_t w[3*3*(MAX_DCI_SIZE_BITS+16)];
140

141
void dci_encoding(uint8_t *a,
142 143 144 145 146
                  uint8_t A,
                  uint16_t E,
                  uint8_t *e,
                  uint16_t rnti)
{
147 148


149 150
  uint8_t D = (A + 16);
  uint32_t RCC;
151 152

#ifdef DEBUG_DCI_ENCODING
153
  int32_t i;
154
#endif
155
  // encode dci
156 157

#ifdef DEBUG_DCI_ENCODING
158
  printf("Doing DCI encoding for %d bits, e %p, rnti %x\n",A,e,rnti);
159 160 161 162 163 164 165
#endif

  memset((void *)d,LTE_NULL,96);

  ccodelte_encode(A,2,a,d+96,rnti);

#ifdef DEBUG_DCI_ENCODING
166 167

  for (i=0; i<16+A; i++)
168
    printf("%d : (%d,%d,%d)\n",i,*(d+96+(3*i)),*(d+97+(3*i)),*(d+98+(3*i)));
169

170
#endif
171

172
#ifdef DEBUG_DCI_ENCODING
173
  printf("Doing DCI interleaving for %d coded bits, e %p\n",D*3,e);
174 175 176 177
#endif
  RCC = sub_block_interleaving_cc(D,d+96,w);

#ifdef DEBUG_DCI_ENCODING
178
  printf("Doing DCI rate matching for %d channel bits, RCC %d, e %p\n",E,RCC,e);
179 180 181 182 183 184 185
#endif
  lte_rate_matching_cc(RCC,E,w,e);


}


186
uint8_t *generate_dci0(uint8_t *dci,
187 188 189 190 191 192
                       uint8_t *e,
                       uint8_t DCI_LENGTH,
                       uint8_t aggregation_level,
                       uint16_t rnti)
{

193 194
  uint16_t coded_bits;
  uint8_t dci_flip[8];
195 196

  if (aggregation_level>3) {
197
    printf("dci.c: generate_dci FATAL, illegal aggregation_level %d\n",aggregation_level);
198 199 200 201 202
    return NULL;
  }

  coded_bits = 72 * (1<<aggregation_level);

203 204 205
  /*

  #ifdef DEBUG_DCI_ENCODING
206
  for (i=0;i<1+((DCI_LENGTH+16)/8);i++)
207
    printf("i %d : %x\n",i,dci[i]);
208
  #endif
209
  */
210
  if (DCI_LENGTH<=32) {
211 212 213
    dci_flip[0] = dci[3];
    dci_flip[1] = dci[2];
    dci_flip[2] = dci[1];
214 215
    dci_flip[3] = dci[0];
  } else {
216 217 218 219 220 221 222 223
    dci_flip[0] = dci[7];
    dci_flip[1] = dci[6];
    dci_flip[2] = dci[5];
    dci_flip[3] = dci[4];
    dci_flip[4] = dci[3];
    dci_flip[5] = dci[2];
    dci_flip[6] = dci[1];
    dci_flip[7] = dci[0];
224
#ifdef DEBUG_DCI_ENCODING
225
    printf("DCI => %x,%x,%x,%x,%x,%x,%x,%x\n",
226 227
        dci_flip[0],dci_flip[1],dci_flip[2],dci_flip[3],
        dci_flip[4],dci_flip[5],dci_flip[6],dci_flip[7]);
228
#endif
229
  }
230

231 232 233 234 235
  dci_encoding(dci_flip,DCI_LENGTH,coded_bits,e,rnti);

  return(e+coded_bits);
}

236
uint32_t Y;
237 238 239 240 241 242 243 244

#define CCEBITS 72
#define CCEPERSYMBOL 33  // This is for 1200 RE
#define CCEPERSYMBOL0 22  // This is for 1200 RE
#define DCI_BITS_MAX ((2*CCEPERSYMBOL+CCEPERSYMBOL0)*CCEBITS)
#define Msymb (DCI_BITS_MAX/2)
//#define Mquad (Msymb/4)

245
static uint32_t bitrev_cc_dci[32] = {1,17,9,25,5,21,13,29,3,19,11,27,7,23,15,31,0,16,8,24,4,20,12,28,2,18,10,26,6,22,14,30};
246
static int32_t wtemp[2][Msymb];
247

248
void pdcch_interleaving(LTE_DL_FRAME_PARMS *frame_parms,int32_t **z, int32_t **wbar,uint8_t n_symbols_pdcch,uint8_t mi)
249
{
250

251
  int32_t *wptr,*wptr2,*zptr;
252 253 254 255
  uint32_t Mquad = get_nquad(n_symbols_pdcch,frame_parms,mi);
  uint32_t RCC = (Mquad>>5), ND;
  uint32_t row,col,Kpi,index;
  int32_t i,k,a;
256
#ifdef RM_DEBUG
257
  int32_t nulled=0;
258
#endif
259

260
  //  printf("[PHY] PDCCH Interleaving Mquad %d (Nsymb %d)\n",Mquad,n_symbols_pdcch);
261 262
  if ((Mquad&0x1f) > 0)
    RCC++;
263

264 265 266 267
  Kpi = (RCC<<5);
  ND = Kpi - Mquad;

  k=0;
268 269

  for (col=0; col<32; col++) {
270 271
    index = bitrev_cc_dci[col];

272
    for (row=0; row<RCC; row++) {
273
      //printf("col %d, index %d, row %d\n",col,index,row);
274
      if (index>=ND) {
275
        for (a=0; a<frame_parms->nb_antennas_tx_eNB; a++) {
276
          //printf("a %d k %d\n",a,k);
277 278 279

          wptr = &wtemp[a][k<<2];
          zptr = &z[a][(index-ND)<<2];
280

281
          //printf("wptr=%p, zptr=%p\n",wptr,zptr);
282

283 284 285 286 287
          wptr[0] = zptr[0];
          wptr[1] = zptr[1];
          wptr[2] = zptr[2];
          wptr[3] = zptr[3];
        }
288

289
        k++;
290
      }
291

292 293 294 295 296
      index+=32;
    }
  }

  // permutation
297 298 299
  for (i=0; i<Mquad; i++) {

    for (a=0; a<frame_parms->nb_antennas_tx_eNB; a++) {
300 301 302 303 304 305 306 307 308 309 310 311 312

      //wptr  = &wtemp[a][i<<2];
      //wptr2 = &wbar[a][((i+frame_parms->Nid_cell)%Mquad)<<2];
      wptr = &wtemp[a][((i+frame_parms->Nid_cell)%Mquad)<<2];
      wptr2 = &wbar[a][i<<2];
      wptr2[0] = wptr[0];
      wptr2[1] = wptr[1];
      wptr2[2] = wptr[2];
      wptr2[3] = wptr[3];
    }
  }
}

313 314
void pdcch_demapping(uint16_t *llr,uint16_t *wbar,LTE_DL_FRAME_PARMS *frame_parms,uint8_t num_pdcch_symbols,uint8_t mi)
{
315

316 317 318
  uint32_t i, lprime;
  uint16_t kprime,kprime_mod12,mprime,symbol_offset,tti_offset,tti_offset0;
  int16_t re_offset,re_offset0;
319 320 321 322 323 324 325 326 327

  // This is the REG allocation algorithm from 36-211, second part of Section 6.8.5

  int Msymb2;

  switch (frame_parms->N_RB_DL) {
  case 100:
    Msymb2 = Msymb;
    break;
328

329 330 331
  case 75:
    Msymb2 = 3*Msymb/4;
    break;
332

333 334 335
  case 50:
    Msymb2 = Msymb>>1;
    break;
336

337 338 339
  case 25:
    Msymb2 = Msymb>>2;
    break;
340

341 342 343
  case 15:
    Msymb2 = Msymb*15/100;
    break;
344

345 346 347
  case 6:
    Msymb2 = Msymb*6/100;
    break;
348

349 350 351 352
  default:
    Msymb2 = Msymb>>2;
    break;
  }
353

354 355 356 357 358
  mprime=0;


  re_offset = 0;
  re_offset0 = 0; // counter for symbol with pilots (extracted outside!)
359 360 361

  for (kprime=0; kprime<frame_parms->N_RB_DL*12; kprime++) {
    for (lprime=0; lprime<num_pdcch_symbols; lprime++) {
362

363
      symbol_offset = (uint32_t)frame_parms->N_RB_DL*12*lprime;
364

365 366
      tti_offset = symbol_offset + re_offset;
      tti_offset0 = symbol_offset + re_offset0;
367

368 369
      // if REG is allocated to PHICH, skip it
      if (check_phich_reg(frame_parms,kprime,lprime,mi) == 1) {
370 371 372
	//        printf("dci_demapping : skipping REG %d (RE %d)\n",(lprime==0)?kprime/6 : kprime>>2,kprime);
	if ((lprime == 0)&&((kprime%6)==0))
	  re_offset0+=4;
373
      } else { // not allocated to PHICH/PCFICH
374
	//        printf("dci_demapping: REG %d\n",(lprime==0)?kprime/6 : kprime>>2);
375 376 377 378 379 380 381 382 383
        if (lprime == 0) {
          // first symbol, or second symbol+4 TX antennas skip pilots
          kprime_mod12 = kprime%12;

          if ((kprime_mod12 == 0) || (kprime_mod12 == 6)) {
            // kprime represents REG

            for (i=0; i<4; i++) {
              wbar[mprime] = llr[tti_offset0+i];
384
#ifdef DEBUG_DCI_DECODING
385
              LOG_I(PHY,"PDCCH demapping mprime %d.%d <= llr %d (symbol %d re %d) -> (%d,%d)\n",mprime/4,i,tti_offset0+i,symbol_offset,re_offset0,*(char*)&wbar[mprime],*(1+(char*)&wbar[mprime]));
386
#endif
387 388 389 390 391 392 393 394 395 396 397 398 399
              mprime++;
              re_offset0++;
            }
          }
        } else if ((lprime==1)&&(frame_parms->nb_antennas_tx_eNB == 4)) {
          // LATER!!!!
        } else { // no pilots in this symbol
          kprime_mod12 = kprime%12;

          if ((kprime_mod12 == 0) || (kprime_mod12 == 4) || (kprime_mod12 == 8)) {
            // kprime represents REG
            for (i=0; i<4; i++) {
              wbar[mprime] = llr[tti_offset+i];
400
#ifdef DEBUG_DCI_DECODING
401
              LOG_I(PHY,"PDCCH demapping mprime %d.%d <= llr %d (symbol %d re %d) -> (%d,%d)\n",mprime/4,i,tti_offset+i,symbol_offset,re_offset+i,*(char*)&wbar[mprime],*(1+(char*)&wbar[mprime]));
402
#endif
403 404 405 406
              mprime++;
            }
          }  // is representative
        } // no pilots case
407 408 409 410
      } // not allocated to PHICH/PCFICH

      // Stop when all REGs are copied in
      if (mprime>=Msymb2)
411
        break;
412
    } //lprime loop
413

414 415 416 417 418
    re_offset++;

  } // kprime loop
}

419
static uint16_t wtemp_rx[Msymb];
420 421
void pdcch_deinterleaving(LTE_DL_FRAME_PARMS *frame_parms,uint16_t *z, uint16_t *wbar,uint8_t number_pdcch_symbols,uint8_t mi)
{
422

423
  uint16_t *wptr,*zptr,*wptr2;
424

425 426 427 428
  uint16_t Mquad=get_nquad(number_pdcch_symbols,frame_parms,mi);
  uint32_t RCC = (Mquad>>5), ND;
  uint32_t row,col,Kpi,index;
  int32_t i,k;
429 430 431 432 433


  //  printf("Mquad %d, RCC %d\n",Mquad,RCC);

  if (!z) {
434
    printf("dci.c: pdcch_deinterleaving: FATAL z is Null\n");
435 436
    return;
  }
437

438
  // undo permutation
439
  for (i=0; i<Mquad; i++) {
440 441 442 443 444 445 446
    wptr = &wtemp_rx[((i+frame_parms->Nid_cell)%Mquad)<<2];
    wptr2 = &wbar[i<<2];

    wptr[0] = wptr2[0];
    wptr[1] = wptr2[1];
    wptr[2] = wptr2[2];
    wptr[3] = wptr2[3];
447 448 449 450 451 452 453 454 455 456
    /*    
    printf("pdcch_deinterleaving (%p,%p): quad %d (%d) -> (%d,%d %d,%d %d,%d %d,%d)\n",wptr,wptr2,i,(i+frame_parms->Nid_cell)%Mquad,
	   ((char*)wptr2)[0],
	   ((char*)wptr2)[1],
	   ((char*)wptr2)[2],
	   ((char*)wptr2)[3],
	   ((char*)wptr2)[4],
	   ((char*)wptr2)[5],
	   ((char*)wptr2)[6],
	   ((char*)wptr2)[7]);
457
    */
458 459 460 461 462

  }

  if ((Mquad&0x1f) > 0)
    RCC++;
463

464 465 466 467
  Kpi = (RCC<<5);
  ND = Kpi - Mquad;

  k=0;
468 469

  for (col=0; col<32; col++) {
470 471
    index = bitrev_cc_dci[col];

472
    for (row=0; row<RCC; row++) {
473 474 475 476 477
      //      printf("row %d, index %d, Nd %d\n",row,index,ND);
      if (index>=ND) {



478 479 480 481 482 483 484 485
        wptr = &wtemp_rx[k<<2];
        zptr = &z[(index-ND)<<2];

        zptr[0] = wptr[0];
        zptr[1] = wptr[1];
        zptr[2] = wptr[2];
        zptr[3] = wptr[3];

486
	/*        
487 488 489 490 491 492 493 494 495
        printf("deinterleaving ; k %d, index-Nd %d  => (%d,%d,%d,%d,%d,%d,%d,%d)\n",k,(index-ND),
               ((int8_t *)wptr)[0],
               ((int8_t *)wptr)[1],
               ((int8_t *)wptr)[2],
               ((int8_t *)wptr)[3],
               ((int8_t *)wptr)[4],
               ((int8_t *)wptr)[5],
               ((int8_t *)wptr)[6],
               ((int8_t *)wptr)[7]);
496
	*/
497
        k++;
498
      }
499

500
      index+=32;
501

502 503 504
    }
  }

505
  for (i=0; i<Mquad; i++) {
506
    zptr = &z[i<<2];
507
    /*    
508
    printf("deinterleaving ; quad %d  => (%d,%d,%d,%d,%d,%d,%d,%d)\n",i,
509 510 511 512 513 514 515 516
     ((int8_t *)zptr)[0],
     ((int8_t *)zptr)[1],
     ((int8_t *)zptr)[2],
     ((int8_t *)zptr)[3],
     ((int8_t *)zptr)[4],
     ((int8_t *)zptr)[5],
     ((int8_t *)zptr)[6],
     ((int8_t *)zptr)[7]);
517
    */  
518
  }
519

520 521 522
}


523
int32_t pdcch_qpsk_qpsk_llr(LTE_DL_FRAME_PARMS *frame_parms,
524 525 526 527 528 529 530
                            int32_t **rxdataF_comp,
                            int32_t **rxdataF_comp_i,
                            int32_t **rho_i,
                            int16_t *pdcch_llr16,
                            int16_t *pdcch_llr8in,
                            uint8_t symbol)
{
531

532 533 534 535
  int16_t *rxF=(int16_t*)&rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rxF_i=(int16_t*)&rxdataF_comp_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rho=(int16_t*)&rho_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *llr128;
536
  int32_t i;
537
  char *pdcch_llr8;
538
  int16_t *pdcch_llr;
539 540 541 542
  pdcch_llr8 = (char *)&pdcch_llr8in[symbol*frame_parms->N_RB_DL*12];
  pdcch_llr = &pdcch_llr16[symbol*frame_parms->N_RB_DL*12];

  //  printf("dlsch_qpsk_qpsk: symbol %d\n",symbol);
543

544
  llr128 = (int16_t*)pdcch_llr;
545 546

  if (!llr128) {
547
    printf("dlsch_qpsk_qpsk_llr: llr is null, symbol %d\n",symbol);
548 549 550
    return -1;
  }

551 552 553 554
  qpsk_qpsk(rxF,
            rxF_i,
            llr128,
            rho,
555
            frame_parms->N_RB_DL*12);
556 557

  //prepare for Viterbi which accepts 8 bit, but prefers 4 bit, soft input.
558
  for (i=0; i<(frame_parms->N_RB_DL*24); i++) {
559 560 561 562 563 564 565 566 567 568 569 570 571 572 573
    if (*pdcch_llr>7)
      *pdcch_llr8=7;
    else if (*pdcch_llr<-8)
      *pdcch_llr8=-8;
    else
      *pdcch_llr8 = (char)(*pdcch_llr);

    pdcch_llr++;
    pdcch_llr8++;
  }

  return(0);
}


574
int32_t pdcch_llr(LTE_DL_FRAME_PARMS *frame_parms,
575 576 577 578
                  int32_t **rxdataF_comp,
                  char *pdcch_llr,
                  uint8_t symbol)
{
579

580 581
  int16_t *rxF= (int16_t*) &rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  int32_t i;
582 583 584
  char *pdcch_llr8;

  pdcch_llr8 = &pdcch_llr[2*symbol*frame_parms->N_RB_DL*12];
585

586
  if (!pdcch_llr8) {
587
    printf("pdcch_qpsk_llr: llr is null, symbol %d\n",symbol);
588 589
    return(-1);
  }
590

591
  //    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);
592

593
  for (i=0; i<(frame_parms->N_RB_DL*((symbol==0) ? 16 : 24)); i++) {
594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610

    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);

}

611
//__m128i avg128P;
612 613

//compute average channel_level on each (TX,RX) antenna pair
614
void pdcch_channel_level(int32_t **dl_ch_estimates_ext,
615 616 617 618
                         LTE_DL_FRAME_PARMS *frame_parms,
                         int32_t *avg,
                         uint8_t nb_rb)
{
619

620 621
  int16_t rb;
  uint8_t aatx,aarx;
622
#if defined(__x86_64__) || defined(__i386__)
623
  __m128i *dl_ch128;
624 625 626 627 628
  __m128i avg128P;
#elif defined(__arm__)
  int16x8_t *dl_ch128;
  int32x4_t *avg128P;
#endif
629 630
  for (aatx=0; aatx<frame_parms->nb_antennas_tx_eNB; aatx++)
    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
631
      //clear average level
632
#if defined(__x86_64__) || defined(__i386__)
633
      avg128P = _mm_setzero_si128();
634
      dl_ch128=(__m128i *)&dl_ch_estimates_ext[(aatx<<1)+aarx][frame_parms->N_RB_DL*12];
635
#elif defined(__arm__)
636

637
#endif
638 639
      for (rb=0; rb<nb_rb; rb++) {

640
#if defined(__x86_64__) || defined(__i386__)
641 642 643
        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]));
644
#elif defined(__arm__)
645

646
#endif
647 648 649 650 651 652 653 654
        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]);
          }
        */
655 656
      }

657
      DevAssert( nb_rb );
658 659 660 661
      avg[(aatx<<1)+aarx] = (((int32_t*)&avg128P)[0] +
                             ((int32_t*)&avg128P)[1] +
                             ((int32_t*)&avg128P)[2] +
                             ((int32_t*)&avg128P)[3])/(nb_rb*12);
662

663
      //            printf("Channel level : %d\n",avg[(aatx<<1)+aarx]);
664
    }
665

666
#if defined(__x86_64__) || defined(__i386__)
667 668
  _mm_empty();
  _m_empty();
669
#endif
670 671 672

}

673
#if defined(__x86_64) || defined(__i386__)
674
__m128i mmtmpPD0,mmtmpPD1,mmtmpPD2,mmtmpPD3;
675
#elif defined(__arm__)
676

677
#endif
678
void pdcch_dual_stream_correlation(LTE_DL_FRAME_PARMS *frame_parms,
679 680 681 682 683 684
                                   uint8_t symbol,
                                   int32_t **dl_ch_estimates_ext,
                                   int32_t **dl_ch_estimates_ext_i,
                                   int32_t **dl_ch_rho_ext,
                                   uint8_t output_shift)
{
685

686
  uint16_t rb;
687
#if defined(__x86_64__) || defined(__i386__)
688
  __m128i *dl_ch128,*dl_ch128i,*dl_ch_rho128;
689 690 691
#elif defined(__arm__)

#endif
692
  uint8_t aarx;
693 694 695 696

  //  printf("dlsch_dual_stream_correlation: symbol %d\n",symbol);


697
  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
698

699
#if defined(__x86_64__) || defined(__i386__)
700 701 702 703
    dl_ch128          = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch128i         = (__m128i *)&dl_ch_estimates_ext_i[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch_rho128      = (__m128i *)&dl_ch_rho_ext[aarx][symbol*frame_parms->N_RB_DL*12];

704 705 706
#elif defined(__arm__)

#endif
707

708
    for (rb=0; rb<frame_parms->N_RB_DL; rb++) {
709
      // multiply by conjugated channel
710
#if defined(__x86_64__) || defined(__i386__)
711
      mmtmpPD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128i[0]);
712 713
      //  print_ints("re",&mmtmpPD0);

714 715 716 717
      // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[0],_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)&conjugate[0]);
718
      //  print_ints("im",&mmtmpPD1);
719 720 721
      mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128i[0]);
      // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
722
      //  print_ints("re(shift)",&mmtmpPD0);
723
      mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
724
      //  print_ints("im(shift)",&mmtmpPD1);
725 726
      mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
      mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);
727 728
      //        print_ints("c0",&mmtmpPD2);
      //  print_ints("c1",&mmtmpPD3);
729
      dl_ch_rho128[0] = _mm_packs_epi32(mmtmpPD2,mmtmpPD3);
730

731 732 733
      //print_shorts("rx:",dl_ch128_2);
      //print_shorts("ch:",dl_ch128);
      //print_shorts("pack:",rho128);
734

735 736 737 738 739 740 741 742 743 744 745 746
      // multiply by conjugated channel
      mmtmpPD0 = _mm_madd_epi16(dl_ch128[1],dl_ch128i[1]);
      // mmtmpPD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[1],_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)conjugate);
      mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128i[1]);
      // mmtmpPD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
      mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
      mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
      mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);
747 748


749 750 751
      dl_ch_rho128[1] =_mm_packs_epi32(mmtmpPD2,mmtmpPD3);
      //print_shorts("rx:",dl_ch128_2+1);
      //print_shorts("ch:",dl_ch128+1);
752
      //print_shorts("pack:",rho128+1);
753 754 755 756 757 758 759 760 761 762 763 764
      // multiply by conjugated channel
      mmtmpPD0 = _mm_madd_epi16(dl_ch128[2],dl_ch128i[2]);
      // mmtmpPD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[2],_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)conjugate);
      mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128i[2]);
      // mmtmpPD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
      mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
      mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
      mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);
765

766 767 768 769
      dl_ch_rho128[2] = _mm_packs_epi32(mmtmpPD2,mmtmpPD3);
      //print_shorts("rx:",dl_ch128_2+2);
      //print_shorts("ch:",dl_ch128+2);
      //print_shorts("pack:",rho128+2);
770

771 772 773
      dl_ch128+=3;
      dl_ch128i+=3;
      dl_ch_rho128+=3;
774 775


776
#elif defined(__arm__)
777

778 779 780 781
#endif
     }
  }
#if defined(__x86_64__) || defined(__i386__)
782 783
  _mm_empty();
  _m_empty();
784
#endif
785

786 787 788 789
}


void pdcch_detection_mrc_i(LTE_DL_FRAME_PARMS *frame_parms,
790 791 792 793 794 795
                           int32_t **rxdataF_comp,
                           int32_t **rxdataF_comp_i,
                           int32_t **rho,
                           int32_t **rho_i,
                           uint8_t symbol)
{
796

797
  uint8_t aatx;
798

799
#if defined(__x86_64__) || defined(__i386__)
800
  __m128i *rxdataF_comp128_0,*rxdataF_comp128_1,*rxdataF_comp128_i0,*rxdataF_comp128_i1,*rho128_0,*rho128_1,*rho128_i0,*rho128_i1;
801 802 803
#elif defined(__arm__)
  int16x8_t *rxdataF_comp128_0,*rxdataF_comp128_1,*rxdataF_comp128_i0,*rxdataF_comp128_i1,*rho128_0,*rho128_1,*rho128_i0,*rho128_i1;
#endif
804
  int32_t i;
805 806

  if (frame_parms->nb_antennas_rx>1) {
807
    for (aatx=0; aatx<frame_parms->nb_antennas_tx_eNB; aatx++) {
808 809
      //if (frame_parms->mode1_flag && (aatx>0)) break;

810
#if defined(__x86_64__) || defined(__i386__)
811
      rxdataF_comp128_0   = (__m128i *)&rxdataF_comp[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
812
      rxdataF_comp128_1   = (__m128i *)&rxdataF_comp[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
813 814 815 816
#elif defined(__arm__)
      rxdataF_comp128_0   = (int16x8_t *)&rxdataF_comp[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_1   = (int16x8_t *)&rxdataF_comp[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
#endif
817
      // MRC on each re of rb on MF output
818
      for (i=0; i<frame_parms->N_RB_DL*3; i++) {
819
#if defined(__x86_64__) || defined(__i386__)
820
        rxdataF_comp128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_0[i],1),_mm_srai_epi16(rxdataF_comp128_1[i],1));
821 822 823
#elif defined(__arm__)
        rxdataF_comp128_0[i] = vhaddq_s16(rxdataF_comp128_0[i],rxdataF_comp128_1[i]);
#endif
824 825
      }
    }
826

827
#if defined(__x86_64__) || defined(__i386__)
828 829
    rho128_0 = (__m128i *) &rho[0][symbol*frame_parms->N_RB_DL*12];
    rho128_1 = (__m128i *) &rho[1][symbol*frame_parms->N_RB_DL*12];
830 831 832 833
#elif defined(__arm__)
    rho128_0 = (int16x8_t *) &rho[0][symbol*frame_parms->N_RB_DL*12];
    rho128_1 = (int16x8_t *) &rho[1][symbol*frame_parms->N_RB_DL*12];
#endif
834
    for (i=0; i<frame_parms->N_RB_DL*3; i++) {
835
#if defined(__x86_64__) || defined(__i386__)
836
      rho128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rho128_0[i],1),_mm_srai_epi16(rho128_1[i],1));
837 838 839
#elif defined(__arm__)
      rho128_0[i] = vhaddq_s16(rho128_0[i],rho128_1[i]);
#endif
840
    }
841

842
#if defined(__x86_64__) || defined(__i386__)
843 844
    rho128_i0 = (__m128i *) &rho_i[0][symbol*frame_parms->N_RB_DL*12];
    rho128_i1 = (__m128i *) &rho_i[1][symbol*frame_parms->N_RB_DL*12];
845
    rxdataF_comp128_i0   = (__m128i *)&rxdataF_comp_i[0][symbol*frame_parms->N_RB_DL*12];
846
    rxdataF_comp128_i1   = (__m128i *)&rxdataF_comp_i[1][symbol*frame_parms->N_RB_DL*12];
847 848 849 850 851
#elif defined(__arm__)
    rho128_i0 = (int16x8_t*) &rho_i[0][symbol*frame_parms->N_RB_DL*12];
    rho128_i1 = (int16x8_t*) &rho_i[1][symbol*frame_parms->N_RB_DL*12];
    rxdataF_comp128_i0   = (int16x8_t *)&rxdataF_comp_i[0][symbol*frame_parms->N_RB_DL*12];
    rxdataF_comp128_i1   = (int16x8_t *)&rxdataF_comp_i[1][symbol*frame_parms->N_RB_DL*12];
852

853
#endif
854 855
    // MRC on each re of rb on MF and rho
    for (i=0; i<frame_parms->N_RB_DL*3; i++) {
856
#if defined(__x86_64__) || defined(__i386__)
857 858
      rxdataF_comp128_i0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_i0[i],1),_mm_srai_epi16(rxdataF_comp128_i1[i],1));
      rho128_i0[i]          = _mm_adds_epi16(_mm_srai_epi16(rho128_i0[i],1),_mm_srai_epi16(rho128_i1[i],1));
859 860 861 862 863
#elif defined(__arm__)
      rxdataF_comp128_i0[i] = vhaddq_s16(rxdataF_comp128_i0[i],rxdataF_comp128_i1[i]);
      rho128_i0[i]          = vhaddq_s16(rho128_i0[i],rho128_i1[i]);

#endif
864 865
    }
  }
866

867
#if defined(__x86_64__) || defined(__i386__)
868 869
  _mm_empty();
  _m_empty();
870
#endif
871 872 873
}


874
void pdcch_extract_rbs_single(int32_t **rxdataF,
875 876 877 878 879 880 881
                              int32_t **dl_ch_estimates,
                              int32_t **rxdataF_ext,
                              int32_t **dl_ch_estimates_ext,
                              uint8_t symbol,
                              uint32_t high_speed_flag,
                              LTE_DL_FRAME_PARMS *frame_parms)
{
882 883


884 885 886
  uint16_t rb,nb_rb=0;
  uint8_t i,j,aarx;
  int32_t *dl_ch0,*dl_ch0_ext,*rxF,*rxF_ext;
887

888 889

  int nushiftmod3 = frame_parms->nushift%3;
890
  uint8_t symbol_mod;
891 892 893

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
#ifdef DEBUG_DCI_DECODING
894
  LOG_I(PHY, "extract_rbs_single: symbol_mod %d\n",symbol_mod);
895
#endif
896 897

  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
898 899 900 901 902

    if (high_speed_flag == 1)
      dl_ch0     = &dl_ch_estimates[aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
    else
      dl_ch0     = &dl_ch_estimates[aarx][5];
903

904 905 906 907 908
    dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];

    rxF_ext   = &rxdataF_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];

    rxF       = &rxdataF[aarx][(frame_parms->first_carrier_offset + (symbol*(frame_parms->ofdm_symbol_size)))];
909

910
    if ((frame_parms->N_RB_DL&1) == 0)  { // even number of RBs
911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956
      for (rb=0; rb<frame_parms->N_RB_DL; rb++) {

        // For second half of RBs skip DC carrier
        if (rb==(frame_parms->N_RB_DL>>1)) {
          rxF       = &rxdataF[aarx][(1 + (symbol*(frame_parms->ofdm_symbol_size)))];

          //dl_ch0++;
        }

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));

          for (i=0; i<12; i++) {

            rxF_ext[i]=rxF[i];

          }

          nb_rb++;
          dl_ch0_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          rxF+=12;
        } else {
          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];
              //                        printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j++]=dl_ch0[i];
              //                printf("ch %d => (%d,%d)\n",i,*(short *)&dl_ch0[i],*(1+(short*)&dl_ch0[i]));
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          rxF_ext+=8;

          dl_ch0+=12;
          rxF+=12;
        }
957
      }
958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994
    } else { // Odd number of RBs
      for (rb=0; rb<frame_parms->N_RB_DL>>1; rb++) {

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));

          for (i=0; i<12; i++)
            rxF_ext[i]=rxF[i];

          nb_rb++;
          dl_ch0_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          rxF+=12;
        } else {
          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];
              //                        printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j++]=dl_ch0[i];
              //                printf("ch %d => (%d,%d)\n",i,*(short *)&dl_ch0[i],*(1+(short*)&dl_ch0[i]));
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          rxF_ext+=8;

          dl_ch0+=12;
          rxF+=12;
        }
995
      }
996

997
      // Do middle RB (around DC)
998
      //  printf("dlch_ext %d\n",dl_ch0_ext-&dl_ch_estimates_ext[aarx][0]);
999 1000

      if (symbol_mod==0) {
1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049
        j=0;

        for (i=0; i<6; i++) {
          if ((i!=nushiftmod3) &&
              (i!=(nushiftmod3+3))) {
            dl_ch0_ext[j]=dl_ch0[i];
            rxF_ext[j++]=rxF[i];
            //              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
          }
        }

        rxF       = &rxdataF[aarx][((symbol*(frame_parms->ofdm_symbol_size)))];

        for (; i<12; i++) {
          if ((i!=(nushiftmod3+6)) &&
              (i!=(nushiftmod3+9))) {
            dl_ch0_ext[j]=dl_ch0[i];
            rxF_ext[j++]=rxF[(1+i-6)];
            //              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
          }
        }


        nb_rb++;
        dl_ch0_ext+=8;
        rxF_ext+=8;
        dl_ch0+=12;
        rxF+=7;
        rb++;
      } else {
        for (i=0; i<6; i++) {
          dl_ch0_ext[i]=dl_ch0[i];
          rxF_ext[i]=rxF[i];
        }

        rxF       = &rxdataF[aarx][((symbol*(frame_parms->ofdm_symbol_size)))];

        for (; i<12; i++) {
          dl_ch0_ext[i]=dl_ch0[i];
          rxF_ext[i]=rxF[(1+i-6)];
        }


        nb_rb++;
        dl_ch0_ext+=12;
        rxF_ext+=12;
        dl_ch0+=12;
        rxF+=7;
        rb++;
1050 1051
      }

1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085
      for (; rb<frame_parms->N_RB_DL; rb++) {
        if (symbol_mod > 0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));

          for (i=0; i<12; i++)
            rxF_ext[i]=rxF[i];

          nb_rb++;
          dl_ch0_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          rxF+=12;
        } else {
          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];
              //                printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j++]=dl_ch0[i];
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          rxF_ext+=8;

          dl_ch0+=12;
          rxF+=12;
        }
1086 1087 1088 1089 1090
      }
    }
  }
}

1091
void pdcch_extract_rbs_dual(int32_t **rxdataF,
1092 1093 1094 1095 1096 1097 1098 1099
                            int32_t **dl_ch_estimates,
                            int32_t **rxdataF_ext,
                            int32_t **dl_ch_estimates_ext,
                            uint8_t symbol,
                            uint32_t high_speed_flag,
                            LTE_DL_FRAME_PARMS *frame_parms)
{

1100

1101 1102 1103 1104
  uint16_t rb,nb_rb=0;
  uint8_t i,aarx,j;
  int32_t *dl_ch0,*dl_ch0_ext,*dl_ch1,*dl_ch1_ext,*rxF,*rxF_ext;
  uint8_t symbol_mod;
1105 1106 1107 1108
  int nushiftmod3 = frame_parms->nushift%3;

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

1109
  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
1110 1111 1112 1113

    if (high_speed_flag==1) {
      dl_ch0     = &dl_ch_estimates[aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
      dl_ch1     = &dl_ch_estimates[2+aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
1114
    } else {
1115 1116 1117
      dl_ch0     = &dl_ch_estimates[aarx][5];
      dl_ch1     = &dl_ch_estimates[2+aarx][5];
    }
1118

1119 1120 1121
    dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];
    dl_ch1_ext = &dl_ch_estimates_ext[2+aarx][symbol*(frame_parms->N_RB_DL*12)];

1122
    //    printf("pdcch extract_rbs: rxF_ext pos %d\n",symbol*(frame_parms->N_RB_DL*12));
1123 1124 1125
    rxF_ext   = &rxdataF_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];

    rxF       = &rxdataF[aarx][(frame_parms->first_carrier_offset + (symbol*(frame_parms->ofdm_symbol_size)))];
1126

1127
    if ((frame_parms->N_RB_DL&1) == 0)  // even number of RBs
1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141
      for (rb=0; rb<frame_parms->N_RB_DL; rb++) {

        // For second half of RBs skip DC carrier
        if (rb==(frame_parms->N_RB_DL>>1)) {
          rxF       = &rxdataF[aarx][(1 + (symbol*(frame_parms->ofdm_symbol_size)))];
          //    dl_ch0++;
          //dl_ch1++;
        }

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));
          memcpy(dl_ch1_ext,dl_ch1,12*sizeof(int32_t));

          /*
1142
            printf("rb %d\n",rb);
1143
            for (i=0;i<12;i++)
1144 1145
            printf("(%d %d)",((int16_t *)dl_ch0)[i<<1],((int16_t*)dl_ch0)[1+(i<<1)]);
            printf("\n");
1146 1147 1148
          */
          for (i=0; i<12; i++) {
            rxF_ext[i]=rxF[i];
1149
            //      printf("%d : (%d,%d)\n",(rxF+(2*i)-&rxdataF[aarx][( (symbol*(frame_parms->ofdm_symbol_size)))*2])/2,
1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180
            //  ((int16_t*)&rxF[i<<1])[0],((int16_t*)&rxF[i<<1])[0]);
          }

          nb_rb++;
          dl_ch0_ext+=12;
          dl_ch1_ext+=12;
          rxF_ext+=12;
        } else {
          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];
              //                            printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j]  =dl_ch0[i];
              dl_ch1_ext[j++]=dl_ch1[i];
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          dl_ch1_ext+=8;
          rxF_ext+=8;
        }

        dl_ch0+=12;
        dl_ch1+=12;
        rxF+=12;
1181
      }
1182

1183
    else {  // Odd number of RBs
1184 1185
      for (rb=0; rb<frame_parms->N_RB_DL>>1; rb++) {

1186
        //  printf("rb %d: %d\n",rb,rxF-&rxdataF[aarx][(symbol*(frame_parms->ofdm_symbol_size))*2]);
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));
          memcpy(dl_ch1_ext,dl_ch1,12*sizeof(int32_t));

          for (i=0; i<12; i++)
            rxF_ext[i]=rxF[i];

          nb_rb++;
          dl_ch0_ext+=12;
          dl_ch1_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          dl_ch1+=12;
          rxF+=12;

        } else {
          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];
              //                        printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j]=dl_ch0[i];
              dl_ch1_ext[j++]=dl_ch1[i];
              //                printf("ch %d => (%d,%d)\n",i,*(short *)&dl_ch0[i],*(1+(short*)&dl_ch0[i]));
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          dl_ch1_ext+=8;
          rxF_ext+=8;


          dl_ch0+=12;
          dl_ch1+=12;
          rxF+=12;
        }
      }

      // Do middle RB (around DC)
1233 1234

      if (symbol_mod > 0) {
1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291
        for (i=0; i<6; i++) {
          dl_ch0_ext[i]=dl_ch0[i];
          dl_ch1_ext[i]=dl_ch1[i];
          rxF_ext[i]=rxF[i];
        }

        rxF       = &rxdataF