dlsch_modulation.c 46.2 KB
Newer Older
1
/*******************************************************************************
2
    OpenAirInterface
ghaddab's avatar
ghaddab committed
3
    Copyright(c) 1999 - 2014 Eurecom
4

ghaddab's avatar
ghaddab committed
5 6 7 8
    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
9 10


ghaddab's avatar
ghaddab committed
11 12 13 14
    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
15

ghaddab's avatar
ghaddab committed
16
    You should have received a copy of the GNU General Public License
17 18
    along with OpenAirInterface.The full GNU General Public License is
   included in this distribution in the file called "COPYING". If not,
ghaddab's avatar
ghaddab committed
19
   see <http://www.gnu.org/licenses/>.
20 21

  Contact Information
ghaddab's avatar
ghaddab committed
22 23 24
  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
  OpenAirInterface Dev  : openair4g-devel@eurecom.fr
25

ghaddab's avatar
ghaddab committed
26
  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
27

ghaddab's avatar
ghaddab committed
28
 *******************************************************************************/
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

/*! \file PHY/LTE_TRANSPORT/dlsch_modulation.c
* \brief Top-level routines for generating the PDSCH physical channel from 36-211, V8.6 2009-03
* \author R. Knopp, F. Kaltenberger
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr,florian.kaltenberger@eurecom.fr
* \note
* \warning
*/
#include "PHY/defs.h"
#include "PHY/extern.h"
#include "PHY/CODING/defs.h"
#include "PHY/CODING/extern.h"
#include "PHY/CODING/lte_interleaver_inline.h"
#include "PHY/LTE_TRANSPORT/defs.h"
#include "defs.h"
47
#include "UTIL/LOG/vcd_signal_dumper.h"
48

49
//#define DEBUG_DLSCH_MODULATION
50 51 52

//#define is_not_pilot(pilots,re,nushift,use2ndpilots) ((pilots==0) || ((re!=nushift) && (re!=nushift+6)&&((re!=nushift+3)||(use2ndpilots==1))&&((re!=nushift+9)||(use2ndpilots==1)))?1:0)

53 54
uint8_t is_not_pilot(uint8_t pilots, uint8_t re, uint8_t nushift, uint8_t use2ndpilots)
{
55 56 57

  uint8_t offset = (pilots==2)?3:0;
  int nushiftmod3 = nushift%3;
58

59 60 61 62 63 64
  if (pilots==0)
    return(1);

  if (use2ndpilots==1) {  // This is for SISO (mode 1)
    if ((re!=nushift+offset) && (re!=((nushift+6+offset)%12)))
      return(1);
65
  } else { // 2 antenna pilots
66 67 68
    if ((re!=nushiftmod3) && (re!=nushiftmod3+6) && (re!=nushiftmod3+3) && (re!=nushiftmod3+9))
      return(1);
  }
69

70 71 72
  return(0);
}

73 74
uint8_t is_not_UEspecRS(int first_layer,int re)
{
Raymond Knopp's avatar
 
Raymond Knopp committed
75 76 77 78

  return(1);
}

79 80
void generate_64qam_table(void)
{
81 82 83 84

  int a,b,c,index;


85 86 87 88 89 90
  for (a=-1; a<=1; a+=2)
    for (b=-1; b<=1; b+=2)
      for (c=-1; c<=1; c+=2) {
        index = (1+a)*2 + (1+b) + (1+c)/2;
        qam64_table[index] = -a*(QAM64_n1 + b*(QAM64_n2 + (c*QAM64_n3))); // 0 1 2
      }
91 92
}

93 94
void generate_16qam_table(void)
{
95 96 97

  int a,b,index;

98 99 100 101 102
  for (a=-1; a<=1; a+=2)
    for (b=-1; b<=1; b+=2) {
      index = (1+a) + (1+b)/2;
      qam16_table[index] = -a*(QAM16_n1 + (b*QAM16_n2));
    }
103 104 105 106 107
}




108 109
void layer1prec2A(int32_t *antenna0_sample, int32_t *antenna1_sample, uint8_t precoding_index)
{
110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133

  switch (precoding_index) {

  case 0: // 1 1
    *antenna1_sample=*antenna0_sample;
    break;

  case 1: // 1 -1
    ((int16_t *)antenna1_sample)[0] = -((int16_t *)antenna0_sample)[0];
    ((int16_t *)antenna1_sample)[1] = -((int16_t *)antenna0_sample)[1];
    break;

  case 2: // 1 j
    ((int16_t *)antenna1_sample)[0] = -((int16_t *)antenna0_sample)[1];
    ((int16_t *)antenna1_sample)[1] = ((int16_t *)antenna0_sample)[0];
    break;

  case 3: // 1 -j
    ((int16_t *)antenna1_sample)[0] = ((int16_t *)antenna0_sample)[1];
    ((int16_t *)antenna1_sample)[1] = -((int16_t *)antenna0_sample)[0];
    break;
  }

  // normalize
134 135
  /*  ((int16_t *)antenna0_sample)[0] = (int16_t)((((int16_t *)antenna0_sample)[0]*ONE_OVER_SQRT2_Q15)>>15);
  ((int16_t *)antenna0_sample)[1] = (int16_t)((((int16_t *)antenna0_sample)[1]*ONE_OVER_SQRT2_Q15)>>15);  ((int16_t *)antenna1_sample)[0] = (int16_t)((((int16_t *)antenna1_sample)[0]*ONE_OVER_SQRT2_Q15)>>15);
136
  ((int16_t *)antenna1_sample)[1] = (int16_t)((((int16_t *)antenna1_sample)[1]*ONE_OVER_SQRT2_Q15)>>15);  */
137
}
138

139
int allocate_REs_in_RB(LTE_DL_FRAME_PARMS *frame_parms,
140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
                       mod_sym_t **txdataF,
                       uint32_t *jj,
                       uint32_t *jj2,
                       uint16_t re_offset,
                       uint32_t symbol_offset,
                       LTE_DL_eNB_HARQ_t *dlsch0_harq,
                       LTE_DL_eNB_HARQ_t *dlsch1_harq,
                       uint8_t pilots,
                       int16_t amp,
                       uint8_t precoder_index,
                       int16_t *qam_table_s0,
                       int16_t *qam_table_s1,
                       uint32_t *re_allocated,
                       uint8_t skip_dc,
                       uint8_t skip_half)
{
156 157 158 159 160 161


  uint8_t *x0             = dlsch0_harq->e;
  MIMO_mode_t mimo_mode   = dlsch0_harq->mimo_mode;

  int first_layer0        = dlsch0_harq->first_layer;
162
  int Nlayers0            = dlsch0_harq->Nlayers;
163 164 165
  uint8_t mod_order0      = get_Qm(dlsch0_harq->mcs);


Raymond Knopp's avatar
 
Raymond Knopp committed
166 167 168 169 170
  uint8_t *x1=NULL;
  uint8_t mod_order1=2;
  // Fill these in later for TM8-10
  //  int Nlayers1;
  //  int first_layer1;
171 172 173


  int use2ndpilots = (frame_parms->mode1_flag==1)?1:0;
174 175 176 177 178 179 180

  uint32_t tti_offset,aa;
  uint8_t re;
  uint8_t qam64_table_offset_re = 0;
  uint8_t qam64_table_offset_im = 0;
  uint8_t qam16_table_offset_re = 0;
  uint8_t qam16_table_offset_im = 0;
181 182 183 184 185 186 187 188 189 190 191
  uint8_t qam64_table_offset_re0 = 0;
  uint8_t qam64_table_offset_im0 = 0;
  uint8_t qam16_table_offset_re0 = 0;
  uint8_t qam16_table_offset_im0 = 0;
  uint8_t qam64_table_offset_re1 = 0;
  uint8_t qam64_table_offset_im1 = 0;
  uint8_t qam16_table_offset_re1 = 0;
  uint8_t qam16_table_offset_im1 = 0;
  int16_t xx0_re,xx1_re;
  int16_t xx0_im,xx1_im;

192 193
  int16_t gain_lin_QPSK;//,gain_lin_16QAM1,gain_lin_16QAM2;
  int16_t re_off=re_offset;
194

195 196 197
  uint8_t first_re,last_re;
  int32_t tmp_sample1,tmp_sample2;
  int16_t tmp_amp=amp;
198 199 200 201 202 203 204
  int s=1;

  gain_lin_QPSK = (int16_t)((amp*ONE_OVER_SQRT2_Q15)>>15);
  //  if (mimo_mode == LARGE_CDD) gain_lin_QPSK>>=1;

  if (dlsch1_harq) {
    x1             = dlsch1_harq->e;
Raymond Knopp's avatar
 
Raymond Knopp committed
205
    // Fill these in later for TM8-10
206
    //    Nlayers1       = dlsch1_harq->Nlayers;
Raymond Knopp's avatar
 
Raymond Knopp committed
207
    //    first_layer1   = dlsch1_harq->first_layer;
208 209 210
    mod_order1     = get_Qm(dlsch1_harq->mcs);

  }
211

212 213 214 215
  /*
  switch (mod_order) {
  case 2:
    // QPSK single stream
216

217 218 219 220 221
    break;
  case 4:
    //16QAM Single stream
    gain_lin_16QAM1 = (int16_t)(((int32_t)amp*QAM16_n1)>>15);
    gain_lin_16QAM2 = (int16_t)(((int32_t)amp*QAM16_n2)>>15);
222

223
    break;
224

225 226 227 228 229 230
  case 6:
    //64QAM Single stream
    break;
  default:
    break;
  }
231
  */
232 233

#ifdef DEBUG_DLSCH_MODULATION
234
  printf("allocate_re (mod %d): symbol_offset %d re_offset %d (%d,%d), jj %d -> %d,%d\n",mod_order0,symbol_offset,re_offset,skip_dc,skip_half,*jj, x0[*jj], x0[1+*jj]);
235 236 237 238 239
#endif

  first_re=0;
  last_re=12;

240
  if (skip_half==1)
241 242 243
    last_re=6;
  else if (skip_half==2)
    first_re=6;
244 245

  for (re=first_re; re<last_re; re++) {
246 247


248 249
    if ((skip_dc == 1) && (re==6))
      re_off=re_off - frame_parms->ofdm_symbol_size+1;
250

251
    tti_offset = symbol_offset + re_off + re;
252

Raymond Knopp's avatar
 
Raymond Knopp committed
253 254
    // check that RE is not from Cell-specific RS

255
    if (is_not_pilot(pilots,re,frame_parms->nushift,use2ndpilots)==1) {
256
      //     printf("re %d (jj %d)\n",re,*jj);
Raymond Knopp's avatar
 
Raymond Knopp committed
257

258

259
      if (mimo_mode == SISO) {  //SISO mapping
260 261 262 263 264
        *re_allocated = *re_allocated + 1;

        switch (mod_order0) {
        case 2:  //QPSK

265
//          printf("%d(%d) : %d,%d => ",tti_offset,*jj,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
266 267 268 269 270 271 272 273 274 275 276 277
          for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
            ((int16_t*)&txdataF[aa][tti_offset])[0] += (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //I //b_i
          }

          *jj = *jj + 1;

          for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
            ((int16_t*)&txdataF[aa][tti_offset])[1] += (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //Q //b_{i+1}
          }

          *jj = *jj + 1;

278
 //         printf("%d,%d\n",((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359
          break;

        case 4:  //16QAM

          qam16_table_offset_re = 0;
          qam16_table_offset_im = 0;

          if (x0[*jj] == 1)
            qam16_table_offset_re+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam16_table_offset_im+=2;

          *jj=*jj+1;


          if (x0[*jj] == 1)
            qam16_table_offset_re+=1;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam16_table_offset_im+=1;

          *jj=*jj+1;

          for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
            ((int16_t *)&txdataF[aa][tti_offset])[0]+=qam_table_s0[qam16_table_offset_re];
            ((int16_t *)&txdataF[aa][tti_offset])[1]+=qam_table_s0[qam16_table_offset_im];
            //      ((int16_t *)&txdataF[aa][tti_offset])[0]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_re])>>15);
            //      ((int16_t *)&txdataF[aa][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_im])>>15);
          }

          break;

        case 6:  //64QAM


          qam64_table_offset_re = 0;
          qam64_table_offset_im = 0;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=4;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=4;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=1;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=1;

          *jj=*jj+1;

          for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
            ((int16_t *)&txdataF[aa][tti_offset])[0]+=qam_table_s0[qam64_table_offset_re];//(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_re])>>15);
            ((int16_t *)&txdataF[aa][tti_offset])[1]+=qam_table_s0[qam64_table_offset_im];//(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_im])>>15);
          }

          break;

        }
360
      }
361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383

      else if (mimo_mode == ALAMOUTI) {
        *re_allocated = *re_allocated + 1;
        // normalization for 2 tx antennas
        amp = (int16_t)(((int32_t)tmp_amp*ONE_OVER_SQRT2_Q15)>>15);

        switch (mod_order0) {
        case 2:  //QPSK

          // first antenna position n -> x0

          ((int16_t*)&tmp_sample1)[0] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
          *jj=*jj+1;
          ((int16_t*)&tmp_sample1)[1] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
          *jj=*jj+1;

          // second antenna position n -> -x1*

          ((int16_t*)&tmp_sample2)[0] = (x0[*jj]==1) ? (gain_lin_QPSK) : -gain_lin_QPSK;
          *jj=*jj+1;
          ((int16_t*)&tmp_sample2)[1] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
          *jj=*jj+1;

384
          // normalization for 2 tx antennas
385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865
          ((int16_t*)&txdataF[0][tti_offset])[0] += (int16_t)((((int16_t*)&tmp_sample1)[0]*ONE_OVER_SQRT2_Q15)>>15);
          ((int16_t*)&txdataF[0][tti_offset])[1] += (int16_t)((((int16_t*)&tmp_sample1)[1]*ONE_OVER_SQRT2_Q15)>>15);
          ((int16_t*)&txdataF[1][tti_offset])[0] += (int16_t)((((int16_t*)&tmp_sample2)[0]*ONE_OVER_SQRT2_Q15)>>15);
          ((int16_t*)&txdataF[1][tti_offset])[1] += (int16_t)((((int16_t*)&tmp_sample2)[1]*ONE_OVER_SQRT2_Q15)>>15);

          break;

        case 4:  //16QAM

          // Antenna 0 position n

          qam16_table_offset_re = 0;
          qam16_table_offset_im = 0;

          if (x0[*jj] == 1)
            qam16_table_offset_re+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam16_table_offset_im+=2;

          *jj=*jj+1;


          if (x0[*jj] == 1)
            qam16_table_offset_re+=1;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam16_table_offset_im+=1;

          *jj=*jj+1;

          ((int16_t *)&txdataF[0][tti_offset])[0]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_re])>>15);
          ((int16_t *)&txdataF[0][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_im])>>15);

          // Antenna 1 position n Real part -> -x1*

          qam16_table_offset_re = 0;
          qam16_table_offset_im = 0;

          if (x0[*jj] == 1)
            qam16_table_offset_re+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam16_table_offset_im+=2;

          *jj=*jj+1;


          if (x0[*jj] == 1)
            qam16_table_offset_re+=1;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam16_table_offset_im+=1;

          *jj=*jj+1;

          ((int16_t *)&txdataF[1][tti_offset])[0]+=-(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_re])>>15);
          ((int16_t *)&txdataF[1][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_im])>>15);


          break;

        case 6:   // 64-QAM

          // Antenna 0
          qam64_table_offset_re = 0;
          qam64_table_offset_im = 0;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=4;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=4;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=1;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=1;

          *jj=*jj+1;

          ((int16_t *)&txdataF[0][tti_offset])[0]+=(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_re])>>15);
          ((int16_t *)&txdataF[0][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_im])>>15);


          // Antenna 1 => -x1*
          qam64_table_offset_re = 0;
          qam64_table_offset_im = 0;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=4;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=4;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=1;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=1;

          *jj=*jj+1;

          ((int16_t *)&txdataF[1][tti_offset])[0]+=-(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_re])>>15);
          ((int16_t *)&txdataF[1][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_im])>>15);

          break;
        }

        // fill in the rest of the ALAMOUTI precoding
        if (is_not_pilot(pilots,re + 1,frame_parms->nushift,use2ndpilots)==1) {
          ((int16_t *)&txdataF[0][tti_offset+1])[0] += -((int16_t *)&txdataF[1][tti_offset])[0]; //x1
          ((int16_t *)&txdataF[0][tti_offset+1])[1] += ((int16_t *)&txdataF[1][tti_offset])[1];
          ((int16_t *)&txdataF[1][tti_offset+1])[0] += ((int16_t *)&txdataF[0][tti_offset])[0];  //x0*
          ((int16_t *)&txdataF[1][tti_offset+1])[1] += -((int16_t *)&txdataF[0][tti_offset])[1];
        } else {
          ((int16_t *)&txdataF[0][tti_offset+2])[0] += -((int16_t *)&txdataF[1][tti_offset])[0]; //x1
          ((int16_t *)&txdataF[0][tti_offset+2])[1] += ((int16_t *)&txdataF[1][tti_offset])[1];
          ((int16_t *)&txdataF[1][tti_offset+2])[0] += ((int16_t *)&txdataF[0][tti_offset])[0];  //x0*
          ((int16_t *)&txdataF[1][tti_offset+2])[1] += -((int16_t *)&txdataF[0][tti_offset])[1];
        }
      } else if (mimo_mode == LARGE_CDD) {

        *re_allocated = *re_allocated + 1;

        if (frame_parms->nb_antennas_tx == 2) {
          switch (mod_order0) {
          default:
            LOG_E(PHY,"Unknown mod_order0 %d\n",mod_order0);
            xx0_re=xx0_im=0;
            break;

          case 2:  //QPSK
            //    printf("%d(%d) : %d,%d => ",tti_offset,*jj,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
            xx0_re = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
            *jj = *jj + 1;
            xx0_im = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
            *jj = *jj + 1;



            // printf("%d,%d\n",((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
            break;

          case 4:  //16QAM

            qam16_table_offset_re0 = 0;
            qam16_table_offset_im0 = 0;

            if (x0[*jj] == 1)
              qam16_table_offset_re0+=2;

            *jj=*jj+1;

            if (x0[*jj] == 1)
              qam16_table_offset_im0+=2;

            *jj=*jj+1;

            if (x0[*jj] == 1)
              qam16_table_offset_re0+=1;

            *jj=*jj+1;

            if (x0[*jj] == 1)
              qam16_table_offset_im0+=1;

            *jj=*jj+1;

            xx0_re = qam_table_s0[qam16_table_offset_re0];
            xx0_im = qam_table_s0[qam16_table_offset_im0];

            break;

          case 6:  //64QAM


            qam64_table_offset_re0 = 0;
            qam64_table_offset_im0 = 0;

            if (x0[*jj] == 1)
              qam64_table_offset_re0+=4;

            *jj=*jj+1;

            if (x0[*jj] == 1)
              qam64_table_offset_im0+=4;

            *jj=*jj+1;

            if (x0[*jj] == 1)
              qam64_table_offset_re0+=2;

            *jj=*jj+1;

            if (x0[*jj] == 1)
              qam64_table_offset_im0+=2;

            *jj=*jj+1;

            if (x0[*jj] == 1)
              qam64_table_offset_re0+=1;

            *jj=*jj+1;

            if (x0[*jj] == 1)
              qam64_table_offset_im0+=1;

            *jj=*jj+1;

            xx0_re = qam_table_s0[qam64_table_offset_re0];
            xx0_im = qam_table_s0[qam64_table_offset_im0];


            break;

          }

          switch (mod_order1) {
          default:
            LOG_E(PHY,"Unknown mod_order1 %d\n",mod_order1);
            xx1_re=xx1_im=0;
            break;

          case 2:  //QPSK
            //    printf("%d(%d) : %d,%d => ",tti_offset,*jj,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
            xx1_re = (x1[*jj2]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
            *jj2 = *jj2 + 1;
            xx1_im = (x1[*jj2]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
            *jj2 = *jj2 + 1;
            // printf("%d,%d\n",((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
            break;

          case 4:  //16QAM

            qam16_table_offset_re1 = 0;
            qam16_table_offset_im1 = 0;

            if (x1[*jj2] == 1)
              qam16_table_offset_re1+=2;

            *jj2 = *jj2 + 1;

            if (x1[*jj2] == 1)
              qam16_table_offset_im1+=2;

            *jj2 = *jj2 + 1;

            if (x1[*jj2] == 1)
              qam16_table_offset_re1+=1;

            *jj2 = *jj2 + 1;

            if (x1[*jj2] == 1)
              qam16_table_offset_im1+=1;

            *jj2 = *jj2 + 1;

            xx1_re = qam_table_s1[qam16_table_offset_re1];
            xx1_im = qam_table_s1[qam16_table_offset_im1];

            break;

          case 6:  //64QAM

            qam64_table_offset_re1 = 0;
            qam64_table_offset_im1 = 0;

            if (x1[*jj2] == 1)
              qam64_table_offset_re1+=4;

            *jj2 = *jj2 + 1;

            if (x1[*jj2] == 1)
              qam64_table_offset_im1+=4;

            *jj2 = *jj2 + 1;

            if (x1[*jj2] == 1)
              qam64_table_offset_re1+=2;

            *jj2 = *jj2 + 1;

            if (x1[*jj2] == 1)
              qam64_table_offset_im1+=2;

            *jj2 = *jj2 + 1;

            if (x1[*jj2] == 1)
              qam64_table_offset_re1+=1;

            *jj2 = *jj2 + 1;

            if (x1[*jj2] == 1)
              qam64_table_offset_im1+=1;

            *jj2 = *jj2 + 1;

            xx1_re = qam_table_s1[qam64_table_offset_re1];
            xx1_im = qam_table_s1[qam64_table_offset_im1];


            break;

          }

          // This implements the Large CDD precoding for 2 TX antennas
          // -  -        -    -  -         -  -     -  -  -       -              -
          //| y0 |      | 1  0 || 1    0    || 1   1 || x0 |     |        x0 + x1 |
          //| y1 | = .5 | 0  1 || 0  (-1)^i || 1  -1 || x1 | = .5| (-1)^i(x0 - x1)|
          // -  -        -    -  -         -  -     -  -  -       -
          // Note: Factor .5 is accounted for in amplitude when calling this function
          ((int16_t *)&txdataF[0][tti_offset])[0]+=((xx0_re+xx1_re)>>1);
          ((int16_t *)&txdataF[1][tti_offset])[0]+=(s*((xx0_re-xx1_re)>>1));
          ((int16_t *)&txdataF[0][tti_offset])[1]+=((xx0_im+xx1_im)>>1);
          ((int16_t *)&txdataF[1][tti_offset])[1]+=(s*((xx0_im-xx1_im)>>1));
          /*
          printf("CDD: xx0 (%d,%d), xx1(%d,%d), s(%d), txF[0] (%d,%d), txF[1] (%d,%d)\n",
           xx0_re,xx0_im,xx1_re,xx1_im, s, ((int16_t *)&txdataF[0][tti_offset])[0],((int16_t *)&txdataF[0][tti_offset])[1],
           ((int16_t *)&txdataF[1][tti_offset])[0],((int16_t *)&txdataF[1][tti_offset])[1]);
          */
          // s alternates +1/-1 for each RE
          s = -s;
        }
      } else if ((mimo_mode >= UNIFORM_PRECODING11)&&(mimo_mode <= PUSCH_PRECODING1)) {
        // this is for transmission modes 4-6 (1 layer)
        *re_allocated = *re_allocated + 1;
        amp = (int16_t)(((int32_t)tmp_amp*ONE_OVER_SQRT2_Q15)>>15);

        switch (mod_order0) {
        case 2:  //QPSK

          ((int16_t*)&tmp_sample1)[0] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
          *jj = *jj + 1;
          ((int16_t*)&tmp_sample1)[1] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
          *jj = *jj + 1;

          // normalization for 2 tx antennas
          ((int16_t*)&txdataF[0][tti_offset])[0] += (int16_t)((((int16_t*)&tmp_sample1)[0]*ONE_OVER_SQRT2_Q15)>>15);
          ((int16_t*)&txdataF[0][tti_offset])[1] += (int16_t)((((int16_t*)&tmp_sample1)[1]*ONE_OVER_SQRT2_Q15)>>15);

          if (frame_parms->nb_antennas_tx == 2) {
            layer1prec2A(&tmp_sample1,&tmp_sample2,precoder_index);
            ((int16_t*)&txdataF[1][tti_offset])[0] += (int16_t)((((int16_t*)&tmp_sample2)[0]*ONE_OVER_SQRT2_Q15)>>15);
            ((int16_t*)&txdataF[1][tti_offset])[1] += (int16_t)((((int16_t*)&tmp_sample2)[1]*ONE_OVER_SQRT2_Q15)>>15);
          }

          break;

        case 4:  //16QAM

          qam16_table_offset_re = 0;
          qam16_table_offset_im = 0;

          if (x0[*jj] == 1)
            qam16_table_offset_re+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam16_table_offset_im+=2;

          *jj=*jj+1;


          if (x0[*jj] == 1)
            qam16_table_offset_re+=1;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam16_table_offset_im+=1;

          *jj=*jj+1;

          ((int16_t*)&tmp_sample1)[0] = (int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_re])>>15);
          ((int16_t*)&tmp_sample1)[1] = (int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_im])>>15);

          ((int16_t *)&txdataF[0][tti_offset])[0] += ((int16_t*)&tmp_sample1)[0];
          ((int16_t *)&txdataF[0][tti_offset])[1] += ((int16_t*)&tmp_sample1)[1];

          if (frame_parms->nb_antennas_tx == 2) {
            layer1prec2A(&tmp_sample1,&tmp_sample2,precoder_index);
            ((int16_t*)&txdataF[1][tti_offset])[0] += ((int16_t*)&tmp_sample2)[0];
            ((int16_t*)&txdataF[1][tti_offset])[1] += ((int16_t*)&tmp_sample2)[1];
          }

          break;

        case 6:  //64QAM


          qam64_table_offset_re = 0;
          qam64_table_offset_im = 0;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=4;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=4;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=2;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_re+=1;

          *jj=*jj+1;

          if (x0[*jj] == 1)
            qam64_table_offset_im+=1;

          *jj=*jj+1;

          ((int16_t*)&tmp_sample1)[0] = (int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_re])>>15);
          ((int16_t*)&tmp_sample1)[1] = (int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_im])>>15);

          ((int16_t *)&txdataF[0][tti_offset])[0] += ((int16_t*)&tmp_sample1)[0];
          ((int16_t *)&txdataF[0][tti_offset])[1] += ((int16_t*)&tmp_sample1)[1];

          if (frame_parms->nb_antennas_tx == 2) {
            layer1prec2A(&tmp_sample1,&tmp_sample2,precoder_index);
            ((int16_t*)&txdataF[1][tti_offset])[0] += ((int16_t*)&tmp_sample2)[0];
            ((int16_t*)&txdataF[1][tti_offset])[1] += ((int16_t*)&tmp_sample2)[1];
          }

          break;

        }
866
      }
867

868
      if (mimo_mode == ALAMOUTI) {
869 870 871 872 873 874 875
        re++;  // adjacent carriers are taken care of by precoding
        *re_allocated = *re_allocated + 1;

        if (is_not_pilot(pilots,re,frame_parms->nushift,use2ndpilots)==0) {
          re++;
          *re_allocated = *re_allocated + 1;
        }
876
      }
877

Raymond Knopp's avatar
 
Raymond Knopp committed
878 879
      if (mimo_mode >= TM8) { //TM8,TM9,TM10

880 881 882 883 884
        if (is_not_UEspecRS(first_layer0,re)) {
          switch (mod_order0) {
          case 2:  //QPSK

            //    printf("%d : %d,%d => ",tti_offset,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
885
            for (int layer=first_layer0; layer<=(first_layer0+Nlayers0); layer++) {
886 887 888 889 890 891 892 893 894
              ((int16_t*)&txdataF[layer][tti_offset])[0] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //I //b_i
              *jj = *jj + 1;
              ((int16_t*)&txdataF[layer][tti_offset])[1] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //Q //b_{i+1}
              *jj = *jj + 1;
            }

            break;

          case 4:  //16QAM
895
            if (is_not_UEspecRS(0/*layer (FIXME uninitialized!)*/,re)) {
896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918
              qam16_table_offset_re = 0;
              qam16_table_offset_im = 0;

              if (x0[*jj] == 1)
                qam16_table_offset_re+=2;

              *jj = *jj + 1;

              if (x0[*jj] == 1)
                qam16_table_offset_im+=2;

              *jj = *jj + 1;

              if (x0[*jj] == 1)
                qam16_table_offset_re+=1;

              *jj = *jj + 1;

              if (x0[*jj] == 1)
                qam16_table_offset_im+=1;

              *jj = *jj + 1;

919
              for (int layer=first_layer0; layer<=(first_layer0+Nlayers0); layer++) {
920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962
                ((int16_t*)&txdataF[layer][tti_offset])[0] = qam_table_s0[qam16_table_offset_re];
                ((int16_t*)&txdataF[layer][tti_offset])[1] = qam_table_s0[qam16_table_offset_im];
              }
            }

            break;

          case 6:  //64QAM


            qam64_table_offset_re = 0;
            qam64_table_offset_im = 0;

            if (x0[*jj] == 1)
              qam64_table_offset_re+=4;

            *jj = *jj + 1;

            if (x0[*jj] == 1)
              qam64_table_offset_im+=4;

            *jj = *jj + 1;

            if (x0[*jj] == 1)
              qam64_table_offset_re+=2;

            *jj = *jj + 1;

            if (x0[*jj] == 1)
              qam64_table_offset_im+=2;

            *jj = *jj + 1;

            if (x0[*jj] == 1)
              qam64_table_offset_re+=1;

            *jj = *jj + 1;

            if (x0[*jj] == 1)
              qam64_table_offset_im+=1;

            *jj = *jj + 1;

963
            for (int layer=first_layer0; layer<=(first_layer0+Nlayers0); layer++) {
964 965 966 967 968 969 970 971 972 973 974
              ((int16_t*)&txdataF[layer][tti_offset])[0] = qam_table_s0[qam64_table_offset_re];
              ((int16_t*)&txdataF[layer][tti_offset])[1] = qam_table_s0[qam64_table_offset_im];
            }

            break;

          }
        }
      } else if (mimo_mode>=TM9_10) {
        msg("allocate_REs_in_RB() [dlsch.c] : ERROR, unknown mimo_mode %d\n",mimo_mode);
        return(-1);
Raymond Knopp's avatar
 
Raymond Knopp committed
975
      }
976
    }
977 978


979
  }
Raymond Knopp's avatar
 
Raymond Knopp committed
980

981 982 983 984
  return(0);
}

int allocate_REs_in_RB_MCH(mod_sym_t **txdataF,
985 986 987 988 989 990 991 992 993 994 995 996
                           uint32_t *jj,
                           uint16_t re_offset,
                           uint32_t symbol_offset,
                           uint8_t *x0,
                           uint8_t l,
                           uint8_t mod_order,
                           int16_t amp,
                           int16_t *qam_table_s,
                           uint32_t *re_allocated,
                           uint8_t skip_dc,
                           LTE_DL_FRAME_PARMS *frame_parms)
{
997 998 999 1000 1001 1002 1003 1004 1005

  uint32_t tti_offset,aa;
  uint8_t re;
  uint8_t qam64_table_offset_re = 0;
  uint8_t qam64_table_offset_im = 0;
  uint8_t qam16_table_offset_re = 0;
  uint8_t qam16_table_offset_im = 0;
  int16_t gain_lin_QPSK;//,gain_lin_16QAM1,gain_lin_16QAM2;
  int16_t re_off=re_offset;
1006
  gain_lin_QPSK = (int16_t)((amp*ONE_OVER_SQRT2_Q15)>>15);
1007 1008 1009
  uint8_t first_re,last_re;
  int inc;
#ifdef DEBUG_DLSCH_MODULATION
1010
  printf("allocate_re_MCH (mod %d): symbol_offset %d re_offset %d (%d), jj %d -> %d,%d\n",mod_order,symbol_offset,re_offset,skip_dc,*jj, x0[*jj], x0[1+*jj]);
1011 1012 1013 1014 1015
#endif

  last_re=12;
  first_re=0;
  inc=1;
1016

1017 1018 1019
  if ((l==2)||(l==10)) {
    inc=2;
    first_re=1;
1020
  } else if (l==6) {
1021 1022
    inc=2;
  }
1023 1024 1025

  for (re=first_re; re<last_re; re+=inc) {

1026 1027
    if ((skip_dc == 1) && (re==(6+first_re)))
      re_off=re_off - frame_parms->ofdm_symbol_size+1;
1028

1029
    tti_offset = symbol_offset + re_off + re;
1030

1031 1032
    //    printf("re %d (jj %d)\n",re,*jj);
    *re_allocated = *re_allocated + 1;
1033 1034


1035 1036
    switch (mod_order) {
    case 2:  //QPSK
1037

1038 1039
      //      printf("%d : %d,%d => ",tti_offset,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
      for (aa=0; aa<frame_parms->nb_antennas_tx; aa++)
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051
        ((int16_t*)&txdataF[aa][tti_offset])[0] += (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //I //b_i

      *jj = *jj + 1;

      for (aa=0; aa<frame_parms->nb_antennas_tx; aa++)
        ((int16_t*)&txdataF[aa][tti_offset])[1] += (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //Q //b_{i+1}

      *jj = *jj + 1;

      //  printf("%d,%d\n",((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
      break;

1052
    case 4:  //16QAM
1053

1054 1055
      qam16_table_offset_re = 0;
      qam16_table_offset_im = 0;
1056

1057
      if (x0[*jj] == 1)
1058 1059
        qam16_table_offset_re+=2;

1060
      *jj=*jj+1;
1061

1062
      if (x0[*jj] == 1)
1063 1064
        qam16_table_offset_im+=2;

1065
      *jj=*jj+1;
1066 1067


1068
      if (x0[*jj] == 1)
1069 1070
        qam16_table_offset_re+=1;

1071
      *jj=*jj+1;
1072

1073
      if (x0[*jj] == 1)
1074 1075
        qam16_table_offset_im+=1;

1076
      *jj=*jj+1;
1077

1078
      for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
1079 1080 1081 1082
        ((int16_t *)&txdataF[aa][tti_offset])[0]+=qam_table_s[qam16_table_offset_re];
        ((int16_t *)&txdataF[aa][tti_offset])[1]+=qam_table_s[qam16_table_offset_im];
        //      ((int16_t *)&txdataF[aa][tti_offset])[0]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_re])>>15);
        //      ((int16_t *)&txdataF[aa][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_im])>>15);
1083
      }
1084

1085
      break;
1086

1087
    case 6:  //64QAM
1088 1089


1090 1091
      qam64_table_offset_re = 0;
      qam64_table_offset_im = 0;
1092

1093
      if (x0[*jj] == 1)
1094 1095
        qam64_table_offset_re+=4;

1096
      *jj=*jj+1;
1097

1098
      if (x0[*jj] == 1)
1099 1100
        qam64_table_offset_im+=4;

1101
      *jj=*jj+1;
1102

1103
      if (x0[*jj] == 1)
1104 1105
        qam64_table_offset_re+=2;

1106
      *jj=*jj+1;
1107

1108
      if (x0[*jj] == 1)
1109 1110
        qam64_table_offset_im+=2;

1111
      *jj=*jj+1;
1112

1113
      if (x0[*jj] == 1)
1114 1115
        qam64_table_offset_re+=1;

1116
      *jj=*jj+1;
1117

1118
      if (x0[*jj] == 1)
1119 1120
        qam64_table_offset_im+=1;

1121
      *jj=*jj+1;
1122

1123
      for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
1124 1125
        ((int16_t *)&txdataF[aa][tti_offset])[0]+=qam_table_s[qam64_table_offset_re];//(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_re])>>15);
        ((int16_t *)&txdataF[aa][tti_offset])[1]+=qam_table_s[qam64_table_offset_im];//(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_im])>>15);
1126
      }
1127

1128
      break;
1129

1130
    }
1131 1132
  }

1133 1134 1135
  return(0);
}

1136 1137
uint8_t get_pmi(uint8_t N_RB_DL,LTE_DL_eNB_HARQ_t *dlsch_harq,uint16_t rb)
{
1138 1139 1140 1141


  MIMO_mode_t mode   = dlsch_harq->mimo_mode;
  uint32_t pmi_alloc = dlsch_harq->pmi_alloc;
1142 1143

  //  printf("Getting pmi for RB %d => %d\n",rb,(pmi_alloc>>((rb>>2)<<1))&3);
Raymond Knopp's avatar
 
Raymond Knopp committed
1144 1145 1146 1147 1148
  switch (N_RB_DL) {
  case 6:   // 1 PRB per subband
    if (mode <= PUSCH_PRECODING1)
      return((pmi_alloc>>(rb<<1))&3);
    else
1149 1150
      return((pmi_alloc>>rb)&1);

Raymond Knopp's avatar
 
Raymond Knopp committed
1151
    break;
1152

1153
  default:
Raymond Knopp's avatar
 
Raymond Knopp committed
1154 1155 1156 1157 1158
  case 25:  // 4 PRBs per subband
    if (mode <= PUSCH_PRECODING1)
      return((pmi_alloc>>((rb>>2)<<1))&3);
    else
      return((pmi_alloc>>(rb>>2))&1);
1159

Raymond Knopp's avatar
 
Raymond Knopp committed
1160
    break;
1161

Raymond Knopp's avatar
 
Raymond Knopp committed
1162 1163 1164 1165 1166
  case 50: // 6 PRBs per subband
    if (mode <= PUSCH_PRECODING1)
      return((pmi_alloc>>((rb/6)<<1))&3);
    else
      return((pmi_alloc>>(rb/6))&1);
1167

Raymond Knopp's avatar
 
Raymond Knopp committed
1168
    break;
1169

Raymond Knopp's avatar
 
Raymond Knopp committed
1170 1171 1172 1173
  case 100: // 8 PRBs per subband
    if (mode <= PUSCH_PRECODING1)
      return((pmi_alloc>>((rb>>3)<<1))&3);
    else
1174 1175
      return((pmi_alloc>>(rb>>3))&1);

Raymond Knopp's avatar
 
Raymond Knopp committed
1176 1177
    break;
  }
1178 1179
}

Raymond Knopp's avatar
 
Raymond Knopp committed
1180

1181
int dlsch_modulation(mod_sym_t **txdataF,
1182 1183 1184 1185 1186 1187 1188
                     int16_t amp,
                     uint32_t subframe_offset,
                     LTE_DL_FRAME_PARMS *frame_parms,
                     uint8_t num_pdcch_symbols,
                     LTE_eNB_DLSCH_t *dlsch0,
                     LTE_eNB_DLSCH_t *dlsch1)
{
1189 1190

  uint8_t nsymb;
1191 1192 1193 1194
  uint8_t harq_pid = dlsch0->current_harq_pid;
  LTE_DL_eNB_HARQ_t *dlsch0_harq = dlsch0->harq_processes[harq_pid];
  LTE_DL_eNB_HARQ_t *dlsch1_harq; //= dlsch1->harq_processes[harq_pid];
  uint32_t i,jj,jj2,re_allocated,symbol_offset;
1195 1196
  uint16_t l,rb,re_offset;
  uint32_t rb_alloc_ind;
1197
  uint32_t *rb_alloc = dlsch0_harq->rb_alloc;
1198 1199
  uint8_t pilots=0;
  uint8_t skip_dc,skip_half;
1200
  uint8_t mod_order0 = get_Qm(dlsch0_harq->mcs);
1201
  uint8_t mod_order1 = 0;
1202
  int16_t amp_rho_a, amp_rho_b;
1203 1204 1205
  int16_t qam16_table_a0[4],qam64_table_a0[8],qam16_table_b0[4],qam64_table_b0[8];
  int16_t qam16_table_a1[4],qam64_table_a1[8],qam16_table_b1[4],qam64_table_b1[8];
  int16_t *qam_table_s0,*qam_table_s1;
Raymond Knopp's avatar
 
Raymond Knopp committed
1206
#ifdef DEBUG_DLSCH_MODULATION
1207 1208
  uint8_t Nl0 = dlsch0_harq->Nl;
  uint8_t Nl1;
Raymond Knopp's avatar
 
Raymond Knopp committed
1209
#endif
1210 1211 1212 1213 1214 1215 1216 1217

  if (dlsch1) {
    dlsch1_harq = dlsch1->harq_processes[harq_pid];
    mod_order1 = get_Qm(dlsch1_harq->mcs);
#ifdef DEBUG_DLSCH_MODULATION
    Nl1 = dlsch1_harq->Nl;
#endif
  }
1218

1219
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_DLSCH_MODULATION, VCD_FUNCTION_IN);
1220

1221
  nsymb = (frame_parms->Ncp==0) ? 14:12;
1222

1223 1224
  amp_rho_a = (int16_t)(((int32_t)amp*dlsch0->sqrt_rho_a)>>13);
  amp_rho_b = (int16_t)(((int32_t)amp*dlsch0->sqrt_rho_b)>>13);
1225

1226
  if (mod_order0 == 4)
1227
    for (i=0; i<4; i++) {
1228 1229
      qam16_table_a0[i] = (int16_t)(((int32_t)qam16_table[i]*amp_rho_a)>>15);
      qam16_table_b0[i] = (int16_t)(((int32_t)qam16_table[i]*amp_rho_b)>>15);
1230
    }
1231
  else if (mod_order0 == 6)
1232
    for (i=0; i<8; i++) {
1233 1234
      qam64_table_a0[i] = (int16_t)(((int32_t)qam64_table[i]*amp_rho_a)>>15);
      qam64_table_b0[i] = (int16_t)(((int32_t)qam64_table[i]*amp_rho_b)>>15);
1235
    }
1236 1237

  if (mod_order1 == 4)
1238
    for (i=0; i<4; i++) {
1239 1240 1241
      qam16_table_a1[i] = (int16_t)(((int32_t)qam16_table[i]*amp_rho_a)>>15);
      qam16_table_b1[i] = (int16_t)(((int32_t)qam16_table[i]*amp_rho_b)>>15);
    }
Raymond Knopp's avatar
Raymond Knopp committed
1242
  else if (mod_order1 == 6)
1243
    for (i=0; i<8; i++) {
1244 1245
      qam64_table_a1[i] = (int16_t)(((int32_t)qam64_table[i]*amp_rho_a)>>15);
      qam64_table_b1[i] = (int16_t)(((int32_t)qam64_table[i]*amp_rho_b)>>15);
1246 1247
    }

1248
  //Modulation mapping (difference w.r.t. LTE specs)
1249 1250 1251

  jj=0;
  jj2=0;
1252
  re_allocated=0;
1253

1254
  //  printf("num_pdcch_symbols %d, nsymb %d\n",num_pdcch_symbols,nsymb);
1255 1256
  for (l=num_pdcch_symbols; l<nsymb; l++) {

1257
#ifdef DEBUG_DLSCH_MODULATION
1258
    msg("Generating DLSCH (harq_pid %d,mimo %d, pmi_alloc0 %llx, mod0 %d, mod1 %d, rb_alloc[0] %d) in %d\n",
1259 1260 1261 1262 1263 1264 1265 1266
        harq_pid,
        dlsch0_harq->mimo_mode,
        pmi2hex_2Ar1(dlsch0_harq->pmi_alloc),
        mod_order0,
        mod_order1,
        rb_alloc[0],
        l);
#endif
1267 1268 1269

    if (frame_parms->Ncp==0) { // normal prefix
      if ((l==4)||(l==11))
1270
        pilots=2;   // pilots in nushift+3, nushift+9
1271
      else if (l==7)
1272
        pilots=1;   // pilots in nushift, nushift+6
1273
      else
1274 1275
        pilots=0;
    } else {
1276
      if ((l==3)||(l==9))
1277
        pilots=2;
1278
      else if (l==6)
1279
        pilots=1;
1280
      else
1281
        pilots=0;
1282 1283 1284 1285 1286 1287
    }

    re_offset = frame_parms->first_carrier_offset;
    symbol_offset = (uint32_t)frame_parms->ofdm_symbol_size*(l+(subframe_offset*nsymb));

    //for (aa=0;aa<frame_parms->nb_antennas_tx;aa++)
1288
    //  memset(&txdataF[aa][symbol_offset],0,frame_parms->ofdm_symbol_size<<2);
1289
    //printf("symbol_offset %d,subframe offset %d : pilots %d\n",symbol_offset,subframe_offset,pilots);
1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421
    for (rb=0; rb<frame_parms->N_RB_DL; rb++) {

      if (rb < 32)
        rb_alloc_ind = (rb_alloc[0]>>rb) & 1;
      else if (rb < 64)
        rb_alloc_ind = (rb_alloc[1]>>(rb-32)) & 1;
      else if (rb < 96)
        rb_alloc_ind = (rb_alloc[2]>>(rb-64)) & 1;
      else if (rb < 100)
        rb_alloc_ind = (rb_alloc[3]>>(rb-96)) & 1;
      else
        rb_alloc_ind = 0;

      // check for PBCH
      skip_half=0;

      if ((frame_parms->N_RB_DL&1) == 1) { // ODD N_RB_DL

        if (rb==(frame_parms->N_RB_DL>>1))
          skip_dc = 1;
        else
          skip_dc = 0;

        // PBCH
        if ((subframe_offset==0) &&
            (rb>((frame_parms->N_RB_DL>>1)-3)) &&
            (rb<((frame_parms->N_RB_DL>>1)+3)) &&
            (l>=(nsymb>>1)) &&
            (l<((nsymb>>1) + 4))) {
          rb_alloc_ind = 0;
        }

        //PBCH subframe 0, symbols nsymb>>1 ... nsymb>>1 + 3
        if ((subframe_offset==0) &&
            (rb==((frame_parms->N_RB_DL>>1)-3)) &&
            (l>=(nsymb>>1)) &&
            (l<((nsymb>>1) + 4)))
          skip_half=1;
        else if ((subframe_offset==0) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l>=(nsymb>>1)) && (l<((nsymb>>1) + 4)))
          skip_half=2;

        if (frame_parms->frame_type == TDD) { // TDD
          //SSS TDD
          if (((subframe_offset==0)||(subframe_offset==5)) && (rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==(nsymb-1)) ) {
            rb_alloc_ind = 0;
          }

          //SSS TDD
          if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)-3)) && (l==(nsymb-1)))
            skip_half=1;
          else if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l==(nsymb-1)))
            skip_half=2;

          //PSS TDD
          if (((subframe_offset==1) || (subframe_offset==6)) && (rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==2) ) {
            rb_alloc_ind = 0;
          }

          //PSS TDD
          if (((subframe_offset==1)||(subframe_offset==6)) && (rb==((frame_parms->N_RB_DL>>1)-3)) && (l==2))
            skip_half=1;
          else if (((subframe_offset==1)||(subframe_offset==6)) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l==2))
            skip_half=2;
        } else {
          //PSS FDD
          if (((subframe_offset==0)||(subframe_offset==5)) &&
              (rb>((frame_parms->N_RB_DL>>1)-3)) &&
              (rb<((frame_parms->N_RB_DL>>1)+3)) &&
              (l==((nsymb>>1)-1)) ) {
            rb_alloc_ind = 0;
          }

          //PSS FDD
          if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)-3)) && (l==((nsymb>>1)-1)))
            skip_half=1;
          else if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l==(((nsymb>>1)-1))))
            skip_half=2;

          //SSS FDD
          if (((subframe_offset==0)||(subframe_offset==5)) && (rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==((nsymb>>1)-2)) ) {
            rb_alloc_ind = 0;
          }

          //SSS FDD
          if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)-3)) && ((l==((nsymb>>1)-2))))
            skip_half=1;
          else if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)+3)) && ((l==(nsymb>>1)-2)))
            skip_half=2;

        }

      } else { // EVEN N_RB_DL
        //PBCH
        if ((subframe_offset==0) &&
            (rb>=((frame_parms->N_RB_DL>>1)-3)) &&
            (rb<((frame_parms->N_RB_DL>>1)+3)) &&
            (l>=nsymb>>1) && (l<((nsymb>>1) + 4)))
          rb_alloc_ind = 0;

        skip_dc=0;
        skip_half=0;

        if (frame_parms->frame_type == TDD) { // TDD
          //SSS
          if (((subframe_offset==0)||
               (subframe_offset==5)) &&
              (rb>=((frame_parms->N_RB_DL>>1)-3)) &&
              (rb<((frame_parms->N_RB_DL>>1)+3)) &&
              (l==nsymb-1) ) {
            rb_alloc_ind = 0;
          }

          //PSS
          if (((subframe_offset==1)||
               (subframe_offset==6)) &&
              (rb>=((frame_parms->N_RB_DL>>1)-3)) &&
              (rb<((frame_parms->N_RB_DL>>1)+3)) &&
              (l==2) ) {
            rb_alloc_ind = 0;
          }
        } else { // FDD
          //SSS
          if (((subframe_offset==0)||(subframe_offset==5)) && (rb>=((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==((nsymb>>1)-2)) ) {
            rb_alloc_ind = 0;
          }

          //PSS
          if (((subframe_offset==0)||(subframe_offset==5)) && (rb>=((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==((nsymb>>1)-1)) ) {
            rb_alloc_ind = 0;
          }
        }
      }
1422

1423 1424 1425
      if (dlsch0_harq->Nlayers>1) {
        msg("Nlayers %d: re_offset %d, symbol %d offset %d\n",dlsch0_harq->Nlayers,re_offset,l,symbol_offset);
        return(-1);
1426
      }
1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467

      if (dlsch1) {
        if (dlsch1_harq->Nlayers>1) {
          msg("Nlayers %d: re_offset %d, symbol %d offset %d\n",dlsch0_harq->Nlayers,re_offset,l,symbol_offset);
          return(-1);
        }
      }

      if (mod_order0 == 4)
        qam_table_s0 = ((pilots) ? qam16_table_b0 : qam16_table_a0);
      else if (mod_order0 == 6)
        qam_table_s0 = ((pilots) ? qam64_table_b0 : qam64_table_a0);
      else
        qam_table_s0 = NULL;

      if (mod_order1 == 4)
        qam_table_s1 = ((pilots) ? qam16_table_b1 : qam16_table_a1);
      else if (mod_order1 == 6)
        qam_table_s1 = ((pilots) ? qam64_table_b1 : qam64_table_a1);
      else
        qam_table_s1 = NULL;

      if (rb_alloc_ind > 0) {
        //    printf("Allocated rb %d/symbol %d, skip_half %d, subframe_offset %d, symbol_offset %d, re_offset %d, jj %d\n",rb,l,skip_half,subframe_offset,symbol_offset,re_offset,jj);
        allocate_REs_in_RB(frame_parms,
                           txdataF,
                           &jj,
                           &jj2,
                           re_offset,
                           symbol_offset,
                           dlsch0->harq_processes[harq_pid],
                           (dlsch1==NULL) ? NULL : dlsch1->harq_processes[harq_pid],
                           pilots,
                           ((pilots) ? amp_rho_b : amp_rho_a),
                           get_pmi(frame_parms->N_RB_DL,dlsch0->harq_processes[harq_pid],rb),
                           qam_table_s0,
                           qam_table_s1,
                           &re_allocated,
                           skip_dc,
                           skip_half);

1468
      }
1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481

      re_offset+=12; // go to next RB


      // check if we crossed the symbol boundary and skip DC
      if (re_offset >= frame_parms->ofdm_symbol_size) {
        if (skip_dc == 0)  //even number of RBs (doesn't straddle DC)
          re_offset=1;
        else
          re_offset=7;  // odd number of RBs
      }
    }

1482
  }
1483

1484 1485 1486


#ifdef DEBUG_DLSCH_MODULATION
1487
  msg("generate_dlsch : jj = %d,re_allocated = %d (G %d)\n",jj,re_allocated,get_G(frame_parms,dlsch0_harq->nb_rb,dlsch0_harq->rb_alloc,mod_order0,Nl0,2,0,subframe_offset));
1488
#endif
1489

1490
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_DLSCH_MODULATION, VCD_FUNCTION_OUT);
1491

1492 1493 1494 1495
  return (re_allocated);
}

int mch_modulation(mod_sym_t **txdataF,
1496 1497 1498 1499 1500 1501
                   int16_t amp,
                   uint32_t subframe_offset,
                   LTE_DL_FRAME_PARMS *frame_parms,
                   LTE_eNB_DLSCH_t *dlsch)
{

1502 1503 1504 1505 1506 1507 1508 1509 1510 1511
  uint8_t nsymb,nsymb_pmch;
  uint32_t i,jj,re_allocated,symbol_offset;
  uint16_t l,rb,re_offset;
  uint8_t skip_dc=0;
  uint8_t mod_order = get_Qm(dlsch->harq_processes[0]->mcs);
  int16_t qam16_table_a[4],qam64_table_a[8];//,qam16_table_b[4],qam64_table_b[8];
  int16_t *qam_table_s;

  nsymb_pmch = 12;
  nsymb = (frame_parms->Ncp == NORMAL) ? 14 : 12;
1512

1513
  if (mod_order == 4)
1514
    for (i=0; i<4; i++) {
1515 1516 1517
      qam16_table_a[i] = (int16_t)(((int32_t)qam16_table[i]*amp)>>15);
    }
  else if (mod_order == 6)
1518
    for (i=0; i<8; i++) {
1519
      qam64_table_a[i] = (int16_t)(((int32_t)qam64_table[i]*amp)>>15);
1520 1521 1522
    }

  jj=0;
1523
  re_allocated=0;
1524

1525
  //  printf("num_pdcch_symbols %d, nsymb %d\n",num_pdcch_symbols,nsymb);
1526 1527
  for (l=2; l<nsymb_pmch; l++) {

1528 1529
#ifdef DEBUG_DLSCH_MODULATION
    msg("Generating MCH (mod %d) in %d\n",mod_order, l);
1530
#endif
1531 1532 1533 1534

    re_offset = frame_parms->first_carrier_offset;
    symbol_offset = (uint32_t)frame_parms->ofdm_symbol_size*(l+(subframe_offset*nsymb));

1535 1536
    for (rb=0; rb<frame_parms->N_RB_DL; rb++) {

1537 1538

      if ((frame_parms->N_RB_DL&1) == 1) { // ODD N_RB_DL
1539 1540 1541 1542 1543

        if (rb==(frame_parms->N_RB_DL>>1))
          skip_dc = 1;
        else
          skip_dc = 0;
1544 1545 1546

      }

1547

1548
      if (mod_order == 4)
1549
        qam_table_s = qam16_table_a;
1550
      else if (mod_order == 6)
1551
        qam_table_s = qam64_table_a;
1552
      else
1553
        qam_table_s = NULL;
1554 1555 1556

      //      printf("Allocated rb %d, subframe_offset %d\n",rb,subframe_offset);
      allocate_REs_in_RB_MCH(txdataF,
1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568
                             &jj,
                             re_offset,
                             symbol_offset,
                             dlsch->harq_processes[0]->e,
                             l,
                             mod_order,
                             amp,
                             qam_table_s,
                             &re_allocated,
                             skip_dc,
                             frame_parms);

1569
      re_offset+=12; // go to next RB
1570 1571


1572 1573
      // check if we crossed the symbol boundary and skip DC
      if (re_offset >= frame_parms->ofdm_symbol_size) {
1574 1575 1576 1577
        if (skip_dc == 0)  //even number of RBs (doesn't straddle DC)
          re_offset=1;
        else
          re_offset=7;  // odd number of RBs
1578 1579 1580 1581
      }
    }
  }

1582 1583


1584 1585 1586


#ifdef DEBUG_DLSCH_MODULATION
1587
  msg("generate_dlsch(MCH) : jj = %d,re_allocated = %d (G %d)\n",jj,re_allocated,get_G(frame_parms,dlsch->harq_processes[0]->nb_rb,dlsch->harq_processes[0]->rb_alloc,mod_order,1,2,0,subframe_offset));
1588
#endif
1589 1590

  return (re_allocated);
1591
}