mirror of https://github.com/pvnis/srsRAN_4G.git
Merge branch 'next' into next_testers
Ismael Gomez
7 years ago
commit
a7cd65e307
@ -0,0 +1,152 @@
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/**
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*
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* \section COPYRIGHT
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||||
*
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||||
* Copyright 2013-2015 Software Radio Systems Limited
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*
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||||
* \section LICENSE
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||||
*
|
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* This file is part of the srsLTE library.
|
||||
*
|
||||
* srsLTE is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Affero General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of
|
||||
* the License, or (at your option) any later version.
|
||||
*
|
||||
* srsLTE 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 Affero General Public License for more details.
|
||||
*
|
||||
* A copy of the GNU Affero General Public License can be found in
|
||||
* the LICENSE file in the top-level directory of this distribution
|
||||
* and at http://www.gnu.org/licenses/.
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||||
*
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||||
*/
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||||
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/******************************************************************************
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* File: pmch.h
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*
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* Description: Physical multicast channel
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*
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* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.5
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*****************************************************************************/
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#ifndef PMCH_
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#define PMCH_
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#include "srslte/config.h"
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#include "srslte/phy/common/phy_common.h"
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#include "srslte/phy/mimo/precoding.h"
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#include "srslte/phy/mimo/layermap.h"
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#include "srslte/phy/modem/mod.h"
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#include "srslte/phy/modem/demod_soft.h"
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#include "srslte/phy/scrambling/scrambling.h"
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#include "srslte/phy/phch/dci.h"
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#include "srslte/phy/phch/regs.h"
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#include "srslte/phy/phch/sch.h"
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#include "srslte/phy/common/sequence.h"
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typedef struct {
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srslte_sequence_t seq[SRSLTE_NSUBFRAMES_X_FRAME];
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} srslte_pmch_seq_t;
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typedef struct SRSLTE_API {
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srslte_cbsegm_t cb_segm;
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srslte_ra_dl_grant_t grant;
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srslte_ra_nbits_t nbits[SRSLTE_MAX_CODEWORDS];
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uint32_t sf_idx;
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} srslte_pmch_cfg_t;
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/* PMCH object */
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typedef struct SRSLTE_API {
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srslte_cell_t cell;
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uint32_t nof_rx_antennas;
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uint32_t max_re;
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/* buffers */
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// void buffers are shared for tx and rx
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cf_t *ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS];
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cf_t *symbols[SRSLTE_MAX_PORTS];
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cf_t *x[SRSLTE_MAX_PORTS];
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cf_t *d;
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void *e;
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/* tx & rx objects */
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srslte_modem_table_t mod[4];
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// This is to generate the scrambling seq for multiple MBSFN Area IDs
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srslte_pmch_seq_t **seqs;
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srslte_sch_t dl_sch;
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} srslte_pmch_t;
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SRSLTE_API int srslte_pmch_init(srslte_pmch_t *q,
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uint32_t max_prb);
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SRSLTE_API int srslte_pmch_init_multi(srslte_pmch_t *q,
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uint32_t max_prb,
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uint32_t nof_rx_antennas);
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SRSLTE_API void srslte_pmch_free(srslte_pmch_t *q);
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SRSLTE_API int srslte_pmch_set_area_id(srslte_pmch_t *q, uint16_t area_id);
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SRSLTE_API void srslte_pmch_free_area_id(srslte_pmch_t *q, uint16_t area_id);
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SRSLTE_API int srslte_pmch_get(srslte_pmch_t *q, cf_t *sf_symbols, cf_t *symbols, uint32_t lstart);
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SRSLTE_API int srslte_pmch_put(srslte_pmch_t *q, cf_t *symbols, cf_t *sf_symbols, uint32_t lstart);
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SRSLTE_API int srslte_pmch_cp(srslte_pmch_t *q, cf_t *input, cf_t *output, uint32_t lstart_grant, bool put);
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SRSLTE_API float srslte_pmch_coderate(uint32_t tbs,
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uint32_t nof_re);
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SRSLTE_API int srslte_pmch_cfg(srslte_pdsch_cfg_t *cfg,
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srslte_cell_t cell,
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srslte_ra_dl_grant_t *grant,
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uint32_t cfi,
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uint32_t sf_idx);
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||||
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SRSLTE_API int srslte_pmch_encode(srslte_pmch_t *q,
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srslte_pdsch_cfg_t *cfg,
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srslte_softbuffer_tx_t *softbuffer,
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uint8_t *data,
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uint16_t area_id,
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cf_t *sf_symbols[SRSLTE_MAX_PORTS]);
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||||
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SRSLTE_API int srslte_pmch_decode(srslte_pmch_t *q,
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srslte_pdsch_cfg_t *cfg,
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srslte_softbuffer_rx_t *softbuffer,
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cf_t *sf_symbols,
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cf_t *ce[SRSLTE_MAX_PORTS],
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float noise_estimate,
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uint16_t area_id,
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uint8_t *data);
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SRSLTE_API int srslte_pmch_decode_multi(srslte_pmch_t *q,
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srslte_pdsch_cfg_t *cfg,
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srslte_softbuffer_rx_t *softbuffer,
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cf_t *sf_symbols[SRSLTE_MAX_PORTS],
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cf_t *ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS],
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float noise_estimate,
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uint16_t area_id,
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uint8_t *data);
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SRSLTE_API float srslte_pmch_average_noi(srslte_pmch_t *q);
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SRSLTE_API uint32_t srslte_pmch_last_noi(srslte_pmch_t *q);
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||||
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#endif
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@ -0,0 +1,480 @@
|
||||
/**
|
||||
*
|
||||
* \section COPYRIGHT
|
||||
*
|
||||
* Copyright 2013-2015 Software Radio Systems Limited
|
||||
*
|
||||
* \section LICENSE
|
||||
*
|
||||
* This file is part of the srsLTE library.
|
||||
*
|
||||
* srsLTE is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Affero General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of
|
||||
* the License, or (at your option) any later version.
|
||||
*
|
||||
* srsLTE 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 Affero General Public License for more details.
|
||||
*
|
||||
* A copy of the GNU Affero General Public License can be found in
|
||||
* the LICENSE file in the top-level directory of this distribution
|
||||
* and at http://www.gnu.org/licenses/.
|
||||
*
|
||||
*/
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||||
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||||
#include <stdint.h>
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#include <stdio.h>
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||||
#include <string.h>
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||||
#include <strings.h>
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||||
#include <stdlib.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <math.h>
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#include "prb_dl.h"
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#include "srslte/phy/phch/sch.h"
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#include "srslte/phy/common/phy_common.h"
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#include "srslte/phy/utils/bit.h"
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#include "srslte/phy/utils/debug.h"
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#include "srslte/phy/utils/vector.h"
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#define MAX_PMCH_RE (2 * SRSLTE_CP_EXT_NSYMB * 12)
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const static srslte_mod_t modulations[4] =
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{ SRSLTE_MOD_BPSK, SRSLTE_MOD_QPSK, SRSLTE_MOD_16QAM, SRSLTE_MOD_64QAM };
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//#define DEBUG_IDX
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#ifdef DEBUG_IDX
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cf_t *offset_original=NULL;
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extern int indices[100000];
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extern int indices_ptr;
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#endif
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float srslte_pmch_coderate(uint32_t tbs, uint32_t nof_re)
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{
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return (float) (tbs + 24)/(nof_re);
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}
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int srslte_pmch_cp(srslte_pmch_t *q, cf_t *input, cf_t *output, uint32_t lstart_grant, bool put)
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{
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uint32_t s, n, l, lp, lstart, lend, nof_refs;
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cf_t *in_ptr = input, *out_ptr = output;
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uint32_t offset = 0;
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#ifdef DEBUG_IDX
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indices_ptr = 0;
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if (put) {
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offset_original = output;
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} else {
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offset_original = input;
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||||
}
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#endif
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nof_refs = 6;
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for (s = 0; s < 2; s++) {
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for (l = 0; l < SRSLTE_CP_EXT_NSYMB; l++) {
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for (n = 0; n < q->cell.nof_prb; n++) {
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// If this PRB is assigned
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if (true) {
|
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if (s == 0) {
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lstart = lstart_grant;
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} else {
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||||
lstart = 0;
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||||
}
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lend = SRSLTE_CP_EXT_NSYMB;
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||||
lp = l + s * SRSLTE_CP_EXT_NSYMB;
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||||
if (put) {
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||||
out_ptr = &output[(lp * q->cell.nof_prb + n) * SRSLTE_NRE];
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||||
} else {
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||||
in_ptr = &input[(lp * q->cell.nof_prb + n) * SRSLTE_NRE];
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||||
}
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||||
// This is a symbol in a normal PRB with or without references
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||||
if (l >= lstart && l < lend) {
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||||
if (SRSLTE_SYMBOL_HAS_REF_MBSFN(l,s)) {
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||||
if (l == 0 && s == 1) {
|
||||
offset = 1;
|
||||
} else {
|
||||
offset = 0;
|
||||
}
|
||||
prb_cp_ref(&in_ptr, &out_ptr, offset, nof_refs, nof_refs, put);
|
||||
} else {
|
||||
prb_cp(&in_ptr, &out_ptr, 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int r;
|
||||
if (put) {
|
||||
r = abs((int) (input - in_ptr));
|
||||
} else {
|
||||
r = abs((int) (output - out_ptr));
|
||||
}
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
/**
|
||||
* Puts PMCH in slot number 1
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||||
*
|
||||
* Returns the number of symbols written to sf_symbols
|
||||
*
|
||||
* 36.211 10.3 section 6.3.5
|
||||
*/
|
||||
int srslte_pmch_put(srslte_pmch_t *q, cf_t *symbols, cf_t *sf_symbols, uint32_t lstart)
|
||||
{
|
||||
return srslte_pmch_cp(q, symbols, sf_symbols, lstart, true);
|
||||
}
|
||||
|
||||
/**
|
||||
* Extracts PMCH from slot number 1
|
||||
*
|
||||
* Returns the number of symbols written to PMCH
|
||||
*
|
||||
* 36.211 10.3 section 6.3.5
|
||||
*/
|
||||
int srslte_pmch_get(srslte_pmch_t *q, cf_t *sf_symbols, cf_t *symbols, uint32_t lstart)
|
||||
{
|
||||
return srslte_pmch_cp(q, sf_symbols, symbols, lstart, false);
|
||||
}
|
||||
|
||||
int srslte_pmch_init(srslte_pmch_t *q, uint32_t max_prb)
|
||||
{
|
||||
return srslte_pmch_init_multi(q, max_prb, 1);
|
||||
}
|
||||
|
||||
int srslte_pmch_init_multi(srslte_pmch_t *q, uint32_t max_prb, uint32_t nof_rx_antennas)
|
||||
{
|
||||
int ret = SRSLTE_ERROR_INVALID_INPUTS;
|
||||
int i;
|
||||
|
||||
if (q != NULL &&
|
||||
nof_rx_antennas <= SRSLTE_MAX_PORTS)
|
||||
{
|
||||
|
||||
bzero(q, sizeof(srslte_pmch_t));
|
||||
ret = SRSLTE_ERROR;
|
||||
|
||||
q->cell.nof_prb = max_prb;
|
||||
q->cell.nof_ports = 1;
|
||||
q->max_re = max_prb * MAX_PMCH_RE;
|
||||
q->nof_rx_antennas = nof_rx_antennas;
|
||||
|
||||
INFO("Init PMCH: %d PRBs, max_symbols: %d\n",
|
||||
max_prb, q->max_re);
|
||||
|
||||
for (i = 0; i < 4; i++) {
|
||||
if (srslte_modem_table_lte(&q->mod[i], modulations[i])) {
|
||||
goto clean;
|
||||
}
|
||||
srslte_modem_table_bytes(&q->mod[i]);
|
||||
}
|
||||
|
||||
srslte_sch_init(&q->dl_sch);
|
||||
|
||||
// Allocate int16_t for reception (LLRs)
|
||||
q->e = srslte_vec_malloc(sizeof(int16_t) * q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM));
|
||||
if (!q->e) {
|
||||
goto clean;
|
||||
}
|
||||
|
||||
q->d = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
|
||||
if (!q->d) {
|
||||
goto clean;
|
||||
}
|
||||
|
||||
for (i = 0; i < SRSLTE_MAX_PORTS; i++) {
|
||||
q->x[i] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
|
||||
if (!q->x[i]) {
|
||||
goto clean;
|
||||
}
|
||||
for (int j=0;j<q->nof_rx_antennas;j++) {
|
||||
q->ce[i][j] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
|
||||
if (!q->ce[i][j]) {
|
||||
goto clean;
|
||||
}
|
||||
}
|
||||
}
|
||||
for (int j=0;j<q->nof_rx_antennas;j++) {
|
||||
q->symbols[j] = srslte_vec_malloc(sizeof(cf_t) * q->max_re);
|
||||
if (!q->symbols[j]) {
|
||||
goto clean;
|
||||
}
|
||||
}
|
||||
|
||||
q->seqs = calloc(SRSLTE_MAX_MBSFN_AREA_IDS, sizeof(srslte_pmch_seq_t*));
|
||||
if (!q->seqs) {
|
||||
perror("calloc");
|
||||
goto clean;
|
||||
}
|
||||
|
||||
ret = SRSLTE_SUCCESS;
|
||||
}
|
||||
clean:
|
||||
if (ret == SRSLTE_ERROR) {
|
||||
srslte_pmch_free(q);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
void srslte_pmch_free(srslte_pmch_t *q) {
|
||||
uint16_t i;
|
||||
|
||||
if (q->e) {
|
||||
free(q->e);
|
||||
}
|
||||
if (q->d) {
|
||||
free(q->d);
|
||||
}
|
||||
for (i = 0; i < q->cell.nof_ports; i++) {
|
||||
if (q->x[i]) {
|
||||
free(q->x[i]);
|
||||
}
|
||||
for (int j=0;j<q->nof_rx_antennas;j++) {
|
||||
if (q->ce[i][j]) {
|
||||
free(q->ce[i][j]);
|
||||
}
|
||||
}
|
||||
}
|
||||
for (i=0;i<q->nof_rx_antennas;i++) {
|
||||
if (q->symbols[i]) {
|
||||
free(q->symbols[i]);
|
||||
}
|
||||
}
|
||||
if (q->seqs) {
|
||||
for (i=0; i<SRSLTE_MAX_MBSFN_AREA_IDS; i++) {
|
||||
if (q->seqs[i]) {
|
||||
srslte_pmch_free_area_id(q, i);
|
||||
}
|
||||
}
|
||||
free(q->seqs);
|
||||
}
|
||||
for (i = 0; i < 4; i++) {
|
||||
srslte_modem_table_free(&q->mod[i]);
|
||||
}
|
||||
|
||||
srslte_sch_free(&q->dl_sch);
|
||||
|
||||
bzero(q, sizeof(srslte_pmch_t));
|
||||
|
||||
}
|
||||
|
||||
|
||||
/* Precalculate the scramble sequences for a given MBSFN area ID. This function takes a while
|
||||
* to execute.
|
||||
*/
|
||||
int srslte_pmch_set_area_id(srslte_pmch_t *q, uint16_t area_id) {
|
||||
uint32_t i;
|
||||
if (!q->seqs[area_id]) {
|
||||
q->seqs[area_id] = calloc(1, sizeof(srslte_pmch_seq_t));
|
||||
if (q->seqs[area_id]) {
|
||||
for (i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
|
||||
if (srslte_sequence_pmch(&q->seqs[area_id]->seq[i], 2 * i , area_id, q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM))) {
|
||||
return SRSLTE_ERROR;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return SRSLTE_SUCCESS;
|
||||
}
|
||||
|
||||
void srslte_pmch_free_area_id(srslte_pmch_t* q, uint16_t area_id)
|
||||
{
|
||||
if (q->seqs[area_id]) {
|
||||
for (int i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
|
||||
srslte_sequence_free(&q->seqs[area_id]->seq[i]);
|
||||
}
|
||||
free(q->seqs[area_id]);
|
||||
q->seqs[area_id] = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
int srslte_pmch_cfg(srslte_pdsch_cfg_t *cfg, srslte_cell_t cell, srslte_ra_dl_grant_t *grant, uint32_t cfi, uint32_t sf_idx)
|
||||
{
|
||||
if (cfg) {
|
||||
if (grant) {
|
||||
memcpy(&cfg->grant, grant, sizeof(srslte_ra_dl_grant_t));
|
||||
}
|
||||
if (srslte_cbsegm(&cfg->cb_segm[0], cfg->grant.mcs[0].tbs)) {
|
||||
fprintf(stderr, "Error computing Codeblock segmentation for TBS=%d\n", cfg->grant.mcs[0].tbs);
|
||||
return SRSLTE_ERROR;
|
||||
}
|
||||
srslte_ra_dl_grant_to_nbits(&cfg->grant, cfi, cell, sf_idx, cfg->nbits);
|
||||
cfg->sf_idx = sf_idx;
|
||||
cfg->rv[0] = SRSLTE_PMCH_RV;
|
||||
|
||||
return SRSLTE_SUCCESS;
|
||||
} else {
|
||||
return SRSLTE_ERROR_INVALID_INPUTS;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
int srslte_pmch_decode(srslte_pmch_t *q,
|
||||
srslte_pdsch_cfg_t *cfg, srslte_softbuffer_rx_t *softbuffer,
|
||||
cf_t *sf_symbols, cf_t *ce[SRSLTE_MAX_PORTS], float noise_estimate,
|
||||
uint16_t area_id, uint8_t *data)
|
||||
{
|
||||
cf_t *_sf_symbols[SRSLTE_MAX_PORTS];
|
||||
cf_t *_ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS];
|
||||
|
||||
_sf_symbols[0] = sf_symbols;
|
||||
for (int i=0;i<q->cell.nof_ports;i++) {
|
||||
_ce[i][0] = ce[i];
|
||||
}
|
||||
return srslte_pmch_decode_multi(q, cfg, softbuffer, _sf_symbols, _ce, noise_estimate, area_id, data);
|
||||
}
|
||||
|
||||
/** Decodes the pmch from the received symbols
|
||||
*/
|
||||
int srslte_pmch_decode_multi(srslte_pmch_t *q,
|
||||
srslte_pdsch_cfg_t *cfg, srslte_softbuffer_rx_t *softbuffer,
|
||||
cf_t *sf_symbols[SRSLTE_MAX_PORTS], cf_t *ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS], float noise_estimate,
|
||||
uint16_t area_id, uint8_t *data)
|
||||
{
|
||||
|
||||
/* Set pointers for layermapping & precoding */
|
||||
uint32_t i, n;
|
||||
cf_t *x[SRSLTE_MAX_LAYERS];
|
||||
|
||||
if (q != NULL &&
|
||||
sf_symbols != NULL &&
|
||||
data != NULL &&
|
||||
cfg != NULL)
|
||||
{
|
||||
|
||||
INFO("Decoding PMCH SF: %d, MBSFN area ID: 0x%x, Mod %s, TBS: %d, NofSymbols: %d, NofBitsE: %d, rv_idx: %d, C_prb=%d, cfi=%d\n",
|
||||
cfg->sf_idx, area_id, srslte_mod_string(cfg->grant.mcs[0].mod), cfg->grant.mcs[0].tbs, cfg->nbits[0].nof_re,
|
||||
cfg->nbits[0].nof_bits, 0, cfg->grant.nof_prb, cfg->nbits[0].lstart-1);
|
||||
|
||||
/* number of layers equals number of ports */
|
||||
for (i = 0; i < q->cell.nof_ports; i++) {
|
||||
x[i] = q->x[i];
|
||||
}
|
||||
memset(&x[q->cell.nof_ports], 0, sizeof(cf_t*) * (SRSLTE_MAX_LAYERS - q->cell.nof_ports));
|
||||
|
||||
for (int j=0;j<q->nof_rx_antennas;j++) {
|
||||
/* extract symbols */
|
||||
n = srslte_pmch_get(q, sf_symbols[j], q->symbols[j], cfg->nbits[0].lstart);
|
||||
if (n != cfg->nbits[0].nof_re) {
|
||||
fprintf(stderr, "PMCH 1 extract symbols error expecting %d symbols but got %d, lstart %d\n", cfg->nbits[0].nof_re, n, cfg->nbits[0].lstart);
|
||||
return SRSLTE_ERROR;
|
||||
}
|
||||
|
||||
/* extract channel estimates */
|
||||
for (i = 0; i < q->cell.nof_ports; i++) {
|
||||
n = srslte_pmch_get(q, ce[i][j], q->ce[i][j], cfg->nbits[0].lstart);
|
||||
if (n != cfg->nbits[0].nof_re) {
|
||||
fprintf(stderr, "PMCH 2 extract chest error expecting %d symbols but got %d\n", cfg->nbits[0].nof_re, n);
|
||||
return SRSLTE_ERROR;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// No tx diversity in MBSFN
|
||||
srslte_predecoding_single_multi(q->symbols, q->ce[0], q->d, q->nof_rx_antennas, cfg->nbits[0].nof_re, noise_estimate);
|
||||
|
||||
if (SRSLTE_VERBOSE_ISDEBUG()) {
|
||||
DEBUG("SAVED FILE subframe.dat: received subframe symbols\n");
|
||||
srslte_vec_save_file("subframe.dat", sf_symbols, SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
|
||||
DEBUG("SAVED FILE hest0.dat: channel estimates for port 4\n");
|
||||
srslte_vec_save_file("hest0.dat", ce[0], SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
|
||||
DEBUG("SAVED FILE pmch_symbols.dat: symbols after equalization\n");
|
||||
srslte_vec_save_file("pmch_symbols.bin", q->d, cfg->nbits[0].nof_re*sizeof(cf_t));
|
||||
}
|
||||
|
||||
/* demodulate symbols
|
||||
* The MAX-log-MAP algorithm used in turbo decoding is unsensitive to SNR estimation,
|
||||
* thus we don't need tot set it in thde LLRs normalization
|
||||
*/
|
||||
srslte_demod_soft_demodulate_s(cfg->grant.mcs[0].mod, q->d, q->e, cfg->nbits[0].nof_re);
|
||||
|
||||
/* descramble */
|
||||
srslte_scrambling_s_offset(&q->seqs[area_id]->seq[cfg->sf_idx], q->e, 0, cfg->nbits[0].nof_bits);
|
||||
|
||||
if (SRSLTE_VERBOSE_ISDEBUG()) {
|
||||
DEBUG("SAVED FILE llr.dat: LLR estimates after demodulation and descrambling\n");
|
||||
srslte_vec_save_file("llr.dat", q->e, cfg->nbits[0].nof_bits*sizeof(int16_t));
|
||||
}
|
||||
return srslte_dlsch_decode(&q->dl_sch, cfg, softbuffer, q->e, data);
|
||||
} else {
|
||||
return SRSLTE_ERROR_INVALID_INPUTS;
|
||||
}
|
||||
}
|
||||
|
||||
int srslte_pmch_encode(srslte_pmch_t *q,
|
||||
srslte_pdsch_cfg_t *cfg, srslte_softbuffer_tx_t *softbuffer,
|
||||
uint8_t *data, uint16_t area_id, cf_t *sf_symbols[SRSLTE_MAX_PORTS])
|
||||
{
|
||||
|
||||
int i;
|
||||
/* Set pointers for layermapping & precoding */
|
||||
cf_t *x[SRSLTE_MAX_LAYERS];
|
||||
int ret = SRSLTE_ERROR_INVALID_INPUTS;
|
||||
|
||||
if (q != NULL && cfg != NULL)
|
||||
{
|
||||
for (i=0;i<q->cell.nof_ports;i++) {
|
||||
if (sf_symbols[i] == NULL) {
|
||||
return SRSLTE_ERROR_INVALID_INPUTS;
|
||||
}
|
||||
}
|
||||
|
||||
if (cfg->grant.mcs[0].tbs == 0) {
|
||||
return SRSLTE_ERROR_INVALID_INPUTS;
|
||||
}
|
||||
|
||||
if (cfg->nbits[0].nof_re > q->max_re) {
|
||||
fprintf(stderr,
|
||||
"Error too many RE per subframe (%d). PMCH configured for %d RE (%d PRB)\n",
|
||||
cfg->nbits[0].nof_re, q->max_re, q->cell.nof_prb);
|
||||
return SRSLTE_ERROR_INVALID_INPUTS;
|
||||
}
|
||||
|
||||
INFO("Encoding PMCH SF: %d, Mod %s, NofBits: %d, NofSymbols: %d, NofBitsE: %d, rv_idx: %d\n",
|
||||
cfg->sf_idx, srslte_mod_string(cfg->grant.mcs[0].mod), cfg->grant.mcs[0].tbs,
|
||||
cfg->nbits[0].nof_re, cfg->nbits[0].nof_bits, 0);
|
||||
|
||||
/* number of layers equals number of ports */
|
||||
for (i = 0; i < q->cell.nof_ports; i++) {
|
||||
x[i] = q->x[i];
|
||||
}
|
||||
memset(&x[q->cell.nof_ports], 0, sizeof(cf_t*) * (SRSLTE_MAX_LAYERS - q->cell.nof_ports));
|
||||
|
||||
// TODO: use tb_encode directly
|
||||
if (srslte_dlsch_encode(&q->dl_sch, cfg, softbuffer, data, q->e)) {
|
||||
fprintf(stderr, "Error encoding TB\n");
|
||||
return SRSLTE_ERROR;
|
||||
}
|
||||
|
||||
/* scramble */
|
||||
srslte_scrambling_bytes(&q->seqs[area_id]->seq[cfg->sf_idx], (uint8_t*) q->e, cfg->nbits[0].nof_bits);
|
||||
|
||||
srslte_mod_modulate_bytes(&q->mod[cfg->grant.mcs[0].mod], (uint8_t*) q->e, q->d, cfg->nbits[0].nof_bits);
|
||||
|
||||
/* No tx diversity in MBSFN */
|
||||
memcpy(q->symbols[0], q->d, cfg->nbits[0].nof_re * sizeof(cf_t));
|
||||
|
||||
/* mapping to resource elements */
|
||||
for (i = 0; i < q->cell.nof_ports; i++) {
|
||||
srslte_pmch_put(q, q->symbols[i], sf_symbols[i], cfg->nbits[0].lstart);
|
||||
}
|
||||
|
||||
ret = SRSLTE_SUCCESS;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
uint32_t srslte_pmch_last_noi(srslte_pmch_t *q) {
|
||||
return q->dl_sch.nof_iterations;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
Some files were not shown because too many files have changed in this diff Show More
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Reference in New Issue