mirror of https://github.com/PentHertz/srsLTE.git
56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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#ifndef SRSRAN_REFSIGNAL_DL_NBIOT_H
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#define SRSRAN_REFSIGNAL_DL_NBIOT_H
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#include "srsran/config.h"
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#include "srsran/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 SRSRAN_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 SRSRAN_NBIOT_MAX_NUM_RE_WITH_REFS 40
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#define SRSRAN_NBIOT_REFSIGNAL_NUM_SF(nof_prb, port_id) (((port_id) < 2 ? 8 : 4) * (nof_prb))
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#define SRSRAN_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 SRSRAN_API {
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srsran_nbiot_cell_t cell;
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cf_t* pilots[2][SRSRAN_NOF_SF_X_FRAME]; // Saves the reference signal per subframe for ports 0 and 1
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} srsran_refsignal_dl_nbiot_t;
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SRSRAN_API int srsran_refsignal_dl_nbiot_init(srsran_refsignal_dl_nbiot_t* q);
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SRSRAN_API void srsran_refsignal_dl_nbiot_free(srsran_refsignal_dl_nbiot_t* q);
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SRSRAN_API uint32_t srsran_refsignal_dl_nbiot_nof_symbols(uint32_t port_id);
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SRSRAN_API int srsran_refsignal_dl_nbiot_set_cell(srsran_refsignal_dl_nbiot_t* q, srsran_nbiot_cell_t cell);
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SRSRAN_API uint32_t srsran_refsignal_dl_nbiot_fidx(srsran_nbiot_cell_t cell, uint32_t l, uint32_t port_id, uint32_t m);
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SRSRAN_API uint32_t srsran_refsignal_nrs_nsymbol(uint32_t l);
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SRSRAN_API uint32_t srsran_refsignal_nbiot_cs_nof_re(srsran_nbiot_cell_t* cell, uint32_t port_id);
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SRSRAN_API int srsran_refsignal_nrs_put_sf(srsran_nbiot_cell_t cell, uint32_t port_id, cf_t* pilots, cf_t* sf_symbols);
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SRSRAN_API int srsran_refsignal_nrs_get_sf(srsran_nbiot_cell_t cell, uint32_t port_id, cf_t* sf_symbols, cf_t* pilots);
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#endif // SRSRAN_REFSIGNAL_DL_NBIOT_H
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