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127 lines
6.2 KiB
C
127 lines
6.2 KiB
C
/**
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* Copyright 2013-2021 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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/******************************************************************************
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* File: precoding.h
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*
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* Description: MIMO precoding and deprecoding.
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* Single antenna and tx diversity supported.
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*
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* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.3.4
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*****************************************************************************/
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#ifndef SRSLTE_PRECODING_H
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#define SRSLTE_PRECODING_H
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#include "srslte/config.h"
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#include "srslte/phy/common/phy_common.h"
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/** The precoder takes as input nlayers vectors "x" from the
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* layer mapping and generates nports vectors "y" to be mapped onto
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* resources on each of the antenna ports.
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*/
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/* Generates the vector "y" from the input vector "x"
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*/
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SRSLTE_API int srslte_precoding_single(cf_t* x, cf_t* y, int nof_symbols, float scaling);
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SRSLTE_API int srslte_precoding_diversity(cf_t* x[SRSLTE_MAX_LAYERS],
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cf_t* y[SRSLTE_MAX_PORTS],
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int nof_ports,
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int nof_symbols,
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float scaling);
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SRSLTE_API int srslte_precoding_cdd(cf_t* x[SRSLTE_MAX_LAYERS],
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cf_t* y[SRSLTE_MAX_PORTS],
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int nof_layers,
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int nof_ports,
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int nof_symbols,
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float scaling);
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SRSLTE_API int srslte_precoding_type(cf_t* x[SRSLTE_MAX_LAYERS],
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cf_t* y[SRSLTE_MAX_PORTS],
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int nof_layers,
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int nof_ports,
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int codebook_idx,
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int nof_symbols,
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float scaling,
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srslte_tx_scheme_t type);
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/* Estimates the vector "x" based on the received signal "y" and the channel estimates "h"
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*/
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SRSLTE_API int
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srslte_predecoding_single(cf_t* y, cf_t* h, cf_t* x, float* csi, int nof_symbols, float scaling, float noise_estimate);
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SRSLTE_API int srslte_predecoding_single_multi(cf_t* y[SRSLTE_MAX_PORTS],
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cf_t* h[SRSLTE_MAX_PORTS],
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cf_t* x,
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float* csi[SRSLTE_MAX_CODEWORDS],
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int nof_rxant,
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int nof_symbols,
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float scaling,
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float noise_estimate);
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SRSLTE_API int srslte_predecoding_diversity(cf_t* y,
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cf_t* h[SRSLTE_MAX_PORTS],
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cf_t* x[SRSLTE_MAX_LAYERS],
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int nof_ports,
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int nof_symbols,
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float scaling);
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SRSLTE_API int srslte_predecoding_diversity_multi(cf_t* y[SRSLTE_MAX_PORTS],
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cf_t* h[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS],
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cf_t* x[SRSLTE_MAX_LAYERS],
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float* csi[SRSLTE_MAX_LAYERS],
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int nof_rxant,
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int nof_ports,
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int nof_symbols,
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float scaling);
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SRSLTE_API void srslte_predecoding_set_mimo_decoder(srslte_mimo_decoder_t _mimo_decoder);
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SRSLTE_API int srslte_predecoding_type(cf_t* y[SRSLTE_MAX_PORTS],
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cf_t* h[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS],
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cf_t* x[SRSLTE_MAX_LAYERS],
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float* csi[SRSLTE_MAX_CODEWORDS],
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int nof_rxant,
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int nof_ports,
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int nof_layers,
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int codebook_idx,
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int nof_symbols,
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srslte_tx_scheme_t type,
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float scaling,
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float noise_estimate);
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SRSLTE_API int srslte_precoding_pmi_select(cf_t* h[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS],
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uint32_t nof_symbols,
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float noise_estimate,
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int nof_layers,
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uint32_t* pmi,
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float sinr[SRSLTE_MAX_CODEBOOKS]);
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SRSLTE_API int srslte_precoding_cn(cf_t* h[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS],
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uint32_t nof_tx_antennas,
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uint32_t nof_rx_antennas,
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uint32_t nof_symbols,
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float* cn);
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#endif // SRSLTE_PRECODING_H
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