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112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
/**
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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.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero 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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* srsLTE 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 Affero General Public License for more details.
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*
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* A copy of the GNU Affero 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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/******************************************************************************
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* File: pcfich.h
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*
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* Description: Physical control format indicator channel
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*
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* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.7
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*****************************************************************************/
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#ifndef PCFICH_
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#define PCFICH_
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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/regs.h"
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#define PCFICH_CFI_LEN 32
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#define PCFICH_RE PCFICH_CFI_LEN/2
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/* PCFICH object */
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typedef struct SRSLTE_API {
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srslte_cell_t cell;
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int nof_symbols;
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uint32_t nof_rx_antennas;
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/* handler to REGs resource mapper */
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srslte_regs_t *regs;
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/* buffers */
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cf_t ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS][PCFICH_RE];
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cf_t symbols[SRSLTE_MAX_PORTS][PCFICH_RE];
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cf_t x[SRSLTE_MAX_PORTS][PCFICH_RE];
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cf_t d[PCFICH_RE];
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// cfi table in floats
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float cfi_table_float[3][PCFICH_CFI_LEN];
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/* bit message */
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uint8_t data[PCFICH_CFI_LEN];
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/* received soft bits */
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float data_f[PCFICH_CFI_LEN];
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/* tx & rx objects */
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srslte_modem_table_t mod;
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srslte_sequence_t seq[SRSLTE_NSUBFRAMES_X_FRAME];
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} srslte_pcfich_t;
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SRSLTE_API int srslte_pcfich_init(srslte_pcfich_t *q,
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uint32_t nof_rx_antennas);
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SRSLTE_API int srslte_pcfich_set_cell(srslte_pcfich_t *q,
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srslte_regs_t *regs,
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srslte_cell_t cell);
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SRSLTE_API void srslte_pcfich_free(srslte_pcfich_t *q);
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SRSLTE_API int srslte_pcfich_decode(srslte_pcfich_t *q,
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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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uint32_t subframe,
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uint32_t *cfi,
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float *corr_result);
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SRSLTE_API int srslte_pcfich_decode_multi(srslte_pcfich_t *q,
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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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uint32_t subframe,
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uint32_t *cfi,
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float *corr_result);
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SRSLTE_API int srslte_pcfich_encode(srslte_pcfich_t *q,
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uint32_t cfi,
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cf_t *sf_symbols[SRSLTE_MAX_PORTS],
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uint32_t subframe);
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#endif
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