mirror of https://github.com/PentHertz/srsLTE.git
118 lines
5.7 KiB
C
118 lines
5.7 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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/******************************************************************************
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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 SRSRAN_PRECODING_H
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#define SRSRAN_PRECODING_H
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#include "srsran/config.h"
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#include "srsran/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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SRSRAN_API int srsran_precoding_single(cf_t* x, cf_t* y, int nof_symbols, float scaling);
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SRSRAN_API int srsran_precoding_diversity(cf_t* x[SRSRAN_MAX_LAYERS],
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cf_t* y[SRSRAN_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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SRSRAN_API int srsran_precoding_cdd(cf_t* x[SRSRAN_MAX_LAYERS],
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cf_t* y[SRSRAN_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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SRSRAN_API int srsran_precoding_type(cf_t* x[SRSRAN_MAX_LAYERS],
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cf_t* y[SRSRAN_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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srsran_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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SRSRAN_API int
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srsran_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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SRSRAN_API int srsran_predecoding_single_multi(cf_t* y[SRSRAN_MAX_PORTS],
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cf_t* h[SRSRAN_MAX_PORTS],
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cf_t* x,
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float* csi[SRSRAN_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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SRSRAN_API int srsran_predecoding_diversity(cf_t* y,
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cf_t* h[SRSRAN_MAX_PORTS],
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cf_t* x[SRSRAN_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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SRSRAN_API int srsran_predecoding_diversity_multi(cf_t* y[SRSRAN_MAX_PORTS],
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cf_t* h[SRSRAN_MAX_PORTS][SRSRAN_MAX_PORTS],
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cf_t* x[SRSRAN_MAX_LAYERS],
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float* csi[SRSRAN_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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SRSRAN_API void srsran_predecoding_set_mimo_decoder(srsran_mimo_decoder_t _mimo_decoder);
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SRSRAN_API int srsran_predecoding_type(cf_t* y[SRSRAN_MAX_PORTS],
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cf_t* h[SRSRAN_MAX_PORTS][SRSRAN_MAX_PORTS],
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cf_t* x[SRSRAN_MAX_LAYERS],
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float* csi[SRSRAN_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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srsran_tx_scheme_t type,
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float scaling,
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float noise_estimate);
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SRSRAN_API int srsran_precoding_pmi_select(cf_t* h[SRSRAN_MAX_PORTS][SRSRAN_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[SRSRAN_MAX_CODEBOOKS]);
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SRSRAN_API int srsran_precoding_cn(cf_t* h[SRSRAN_MAX_PORTS][SRSRAN_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 // SRSRAN_PRECODING_H
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