mirror of https://github.com/PentHertz/srsLTE.git
65 lines
2.6 KiB
C
65 lines
2.6 KiB
C
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/*
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* Copyright 2013-2019 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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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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#ifndef SRSLTE_REFSIGNAL_DL_NBIOT_H
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#define SRSLTE_REFSIGNAL_DL_NBIOT_H
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#include "srslte/config.h"
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#include "srslte/phy/common/phy_common.h"
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// Number of references in a subframe: there are 2 symbols for port_id=0,1 x 2 slots x 2 refs per prb
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#define SRSLTE_NBIOT_NUM_NRS_X_SYM_X_PORT 2
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// Max number of symbols with RE in one PRB (4 ports LTE plus 2 port NB-IoT)
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#define SRSLTE_NBIOT_MAX_NUM_RE_WITH_REFS 40
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#define SRSLTE_NBIOT_REFSIGNAL_NUM_SF(nof_prb, port_id) (((port_id) < 2 ? 8 : 4) * (nof_prb))
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#define SRSLTE_NBIOT_REFSIGNAL_PILOT_IDX(i, l, nof_prb) (2 * nof_prb * (l) + (i))
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/** Brief: Narrowband Reference Signal (NRS)
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*
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* Object to manage downlink reference signals for channel estimation. (3GPP TS 36.211 version 13.3 Sec. 10.2.6)
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*/
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typedef struct SRSLTE_API {
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srslte_nbiot_cell_t cell;
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cf_t* pilots[2][SRSLTE_NOF_SF_X_FRAME]; // Saves the reference signal per subframe for ports 0 and 1
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} srslte_refsignal_dl_nbiot_t;
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SRSLTE_API int srslte_refsignal_dl_nbiot_init(srslte_refsignal_dl_nbiot_t* q);
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SRSLTE_API void srslte_refsignal_dl_nbiot_free(srslte_refsignal_dl_nbiot_t* q);
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SRSLTE_API uint32_t srslte_refsignal_dl_nbiot_nof_symbols(uint32_t port_id);
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SRSLTE_API int srslte_refsignal_dl_nbiot_set_cell(srslte_refsignal_dl_nbiot_t* q, srslte_nbiot_cell_t cell);
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SRSLTE_API uint32_t srslte_refsignal_dl_nbiot_fidx(srslte_nbiot_cell_t cell, uint32_t l, uint32_t port_id, uint32_t m);
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SRSLTE_API uint32_t srslte_refsignal_nrs_nsymbol(uint32_t l);
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SRSLTE_API uint32_t srslte_refsignal_nbiot_cs_nof_re(srslte_nbiot_cell_t* cell, uint32_t port_id);
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SRSLTE_API int srslte_refsignal_nrs_put_sf(srslte_nbiot_cell_t cell, uint32_t port_id, cf_t* pilots, cf_t* sf_symbols);
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SRSLTE_API int srslte_refsignal_nrs_get_sf(srslte_nbiot_cell_t cell, uint32_t port_id, cf_t* sf_symbols, cf_t* pilots);
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#endif // SRSLTE_REFSIGNAL_DL_NBIOT_H
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