mirror of https://github.com/PentHertz/srsLTE.git
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
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/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2014 The libLTE Developers. See the
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* COPYRIGHT file at the top-level directory of this distribution.
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*
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* \section LICENSE
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*
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* This file is part of the libLTE library.
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*
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* libLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* libLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* A copy of the GNU Lesser General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#ifndef PHICH_
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#define PHICH_
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#include "lte/common/base.h"
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#include "lte/mimo/precoding.h"
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#include "lte/mimo/layermap.h"
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#include "lte/modem/mod.h"
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#include "lte/modem/demod_hard.h"
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#include "lte/scrambling/scrambling.h"
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#include "regs.h"
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typedef _Complex float cf_t;
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#define PHICH_NORM_NSEQUENCES 8
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#define PHICH_EXT_NSEQUENCES 4
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#define PHICH_MAX_SEQUENCES PHICH_NORM_NSEQUENCES
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#define PHICH_NBITS 3
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#define PHICH_NORM_MSYMB PHICH_NBITS * 4
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#define PHICH_EXT_MSYMB PHICH_NBITS * 2
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#define PHICH_MAX_NSYMB PHICH_NORM_MSYMB
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#define PHICH_NORM_C 1
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#define PHICH_EXT_C 2
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#define PHICH_NORM_NSF 4
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#define PHICH_EXT_NSF 2
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/* phich object */
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typedef struct {
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lte_cp_t cp;
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int nof_prb;
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int nof_tx_ports;
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/* handler to REGs resource mapper */
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regs_t *regs;
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/* buffers */
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cf_t ce[MAX_PORTS_CTRL][PHICH_MAX_NSYMB];
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cf_t phich_symbols[MAX_PORTS_CTRL][PHICH_MAX_NSYMB];
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cf_t phich_x[MAX_PORTS_CTRL][PHICH_MAX_NSYMB];
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cf_t phich_d[PHICH_MAX_NSYMB];
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cf_t phich_d0[PHICH_MAX_NSYMB];
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cf_t phich_z[PHICH_NBITS];
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/* bit message */
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char data[PHICH_NBITS];
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/* tx & rx objects */
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modem_table_t mod;
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demod_hard_t demod;
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sequence_t seq_phich[NSUBFRAMES_X_FRAME];
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}phich_t;
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int phich_init(phich_t *q, regs_t *regs, int cell_id, int nof_prb, int nof_tx_ports, lte_cp_t cp);
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void phich_free(phich_t *q);
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int phich_decode(phich_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS_CTRL],
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int ngroup, int nseq, int nsubframe, char *ack, int *distance);
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int phich_encode(phich_t *q, char ack, int ngroup, int nseq, int nsubframe,
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cf_t *slot_symbols[MAX_PORTS_CTRL]);
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void phich_reset(phich_t *q, cf_t *slot_symbols[MAX_PORTS_CTRL]);
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int phich_ngroups(phich_t *q);
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bool phich_exists(int nframe, int nslot);
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int phich_put(regs_t *h, cf_t *phich, cf_t *slot_data);
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int phich_get(regs_t *h, cf_t *phich, cf_t *slot_data);
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#endif
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