mirror of https://github.com/PentHertz/srsLTE.git
94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 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_CSI_RS_H_
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#define SRSRAN_CSI_RS_H_
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#include "csi_rs_cfg.h"
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#include "srsran/phy/phch/phch_cfg_nr.h"
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#include <complex.h>
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#include <stdbool.h>
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#include <stdint.h>
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/**
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* @brief Number of frequency domain elements for Row 1
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*/
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#define SRSRAN_CSI_RS_NOF_FREQ_DOMAIN_ALLOC_ROW1 4
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/**
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* @brief Number of frequency domain elements for Row 2
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*/
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#define SRSRAN_CSI_RS_NOF_FREQ_DOMAIN_ALLOC_ROW2 12
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/**
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* @brief Number of frequency domain elements for Row 4
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*/
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#define SRSRAN_CSI_RS_NOF_FREQ_DOMAIN_ALLOC_ROW4 3
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/**
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* @brief Number of frequency domain elements for other rows
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*/
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#define SRSRAN_CSI_RS_NOF_FREQ_DOMAIN_ALLOC_OTHER 6
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/**
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* @brief Measurement structure
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*/
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typedef struct SRSRAN_API {
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float rsrp;
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float rsrp_dB;
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float epre;
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float epre_dB;
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float n0;
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float n0_dB;
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float snr_dB;
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uint32_t nof_re;
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} srsran_csi_rs_measure_t;
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/**
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* @brief Calculates if the given periodicity implies a CSI-RS transmission in the given slot
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* @remark Described in TS 36.211 section 7.4.1.5.3 Mapping to physical resources
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* @param periodicity Periodicity configuration
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* @param slot_cfg Slot configuration
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* @return True if the periodicity configuration matches with the slot, false otherwise
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*/
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SRSRAN_API bool srsran_csi_rs_send(const srsran_csi_rs_period_and_offset_t* periodicity,
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const srsran_slot_cfg_t* slot_cfg);
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/**
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* @brief Adds to a RE pattern list the RE used in a CSI-RS resource for all CDM grops. This is intended for generating
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* reserved RE pattern for PDSCH transmission.
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* @param carrier Provides carrier configuration
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* @param resource Provides a CSI-RS resource
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* @param nof_resources Provides the number of ZP-CSI-RS resources
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* @param l Symbol index in the slot
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* @param[out] rvd_mask Provides the reserved mask
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* @return SRSRAN_SUCCESS if the provided data is valid, and SRSRAN_ERROR code otherwise
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*/
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SRSRAN_API int srsran_csi_rs_append_resource_to_pattern(const srsran_carrier_nr_t* carrier,
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const srsran_csi_rs_resource_mapping_t* resource,
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srsran_re_pattern_list_t* re_pattern_list);
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SRSRAN_API int srsran_csi_rs_nzp_put(const srsran_carrier_nr_t* carrier,
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const srsran_slot_cfg_t* slot_cfg,
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const srsran_csi_rs_nzp_resource_t* resource,
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cf_t* grid);
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SRSRAN_API int srsran_csi_rs_nzp_measure(const srsran_carrier_nr_t* carrier,
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const srsran_slot_cfg_t* slot_cfg,
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const srsran_csi_rs_nzp_resource_t* resource,
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const cf_t* grid,
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srsran_csi_rs_measure_t* measure);
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SRSRAN_API uint32_t srsran_csi_rs_measure_info(const srsran_csi_rs_measure_t* measure, char* str, uint32_t str_len);
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#endif // SRSRAN_CSI_RS_H_
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