88 lines
3.3 KiB
C
88 lines
3.3 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: refsignal_dl.h
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*
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* Description: Object to manage downlink reference signals for channel estimation.
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*
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* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.10
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*********************************************************************************************/
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#ifndef SRSLTE_REFSIGNAL_DL_
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#define SRSLTE_REFSIGNAL_DL_
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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_REFSIGNAL_NUM_SF(nof_prb, port_id) (((port_id)<2?8:4)*(nof_prb))
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#define SRSLTE_REFSIGNAL_MAX_NUM_SF(nof_prb) SRSLTE_REFSIGNAL_NUM_SF(nof_prb, 0)
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#define SRSLTE_REFSIGNAL_PILOT_IDX(i,l,cell) (2*cell.nof_prb*(l)+(i))
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/** Cell-Specific Reference Signal */
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typedef struct SRSLTE_API {
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srslte_cell_t cell;
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cf_t *pilots[2][SRSLTE_NSUBFRAMES_X_FRAME]; // Saves the reference signal per subframe for ports 0,1 and ports 2,3
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} srslte_refsignal_cs_t;
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SRSLTE_API int srslte_refsignal_cs_init(srslte_refsignal_cs_t *q,
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uint32_t max_prb);
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SRSLTE_API int srslte_refsignal_cs_set_cell(srslte_refsignal_cs_t * q,
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srslte_cell_t cell);
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SRSLTE_API void srslte_refsignal_cs_free(srslte_refsignal_cs_t *q);
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SRSLTE_API int srslte_refsignal_cs_put_sf(srslte_cell_t cell,
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uint32_t port_id,
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cf_t *pilots,
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cf_t *sf_symbols);
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SRSLTE_API int srslte_refsignal_cs_get_sf(srslte_cell_t cell,
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uint32_t port_id,
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cf_t *sf_symbols,
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cf_t *pilots);
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SRSLTE_API uint32_t srslte_refsignal_cs_fidx(srslte_cell_t cell,
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uint32_t l,
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uint32_t port_id,
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uint32_t m);
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SRSLTE_API uint32_t srslte_refsignal_cs_nsymbol(uint32_t l,
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srslte_cp_t cp,
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uint32_t port_id);
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SRSLTE_API uint32_t srslte_refsignal_cs_v(uint32_t port_id,
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uint32_t ref_symbol_idx);
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SRSLTE_API uint32_t srslte_refsignal_cs_nof_symbols(uint32_t port_id);
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#endif
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