mirror of https://github.com/PentHertz/srsLTE.git
132 lines
4.8 KiB
C
132 lines
4.8 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_CFG_H
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#define SRSRAN_CSI_RS_CFG_H
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#include "srsran/config.h"
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#include "srsran/phy/common/phy_common_nr.h"
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/**
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* @brief Maximum number of ZP CSI-RS resources per set defined in
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* - TS 38.214 clause 5.1.4.2 PDSCH resource mapping with RE level granularity
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* - TS 38.331 constant maxNrofZP-CSI-RS-ResourcesPerSet
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*/
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#define SRSRAN_PHCH_CFG_MAX_NOF_CSI_RS_PER_SET 16
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/**
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* @brief Maximum number of ZP CSI-RS Sets defined in TS 38.331 constant maxNrofZP-CSI-RS-ResourceSets
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*/
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#define SRSRAN_PHCH_CFG_MAX_NOF_CSI_RS_SETS 16
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/**
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* @brief Maximum number of CSI-RS frequency domain allocation bits
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*/
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#define SRSRAN_CSI_RS_NOF_FREQ_DOMAIN_ALLOC_MAX 12
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typedef enum SRSRAN_API {
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srsran_csi_rs_resource_mapping_row_1 = 0,
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srsran_csi_rs_resource_mapping_row_2,
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srsran_csi_rs_resource_mapping_row_4,
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srsran_csi_rs_resource_mapping_row_other,
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} srsran_csi_rs_resource_mapping_row_t;
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typedef enum SRSRAN_API {
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srsran_csi_rs_resource_mapping_density_three = 0,
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srsran_csi_rs_resource_mapping_density_dot5_even,
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srsran_csi_rs_resource_mapping_density_dot5_odd,
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srsran_csi_rs_resource_mapping_density_one,
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srsran_csi_rs_resource_mapping_density_spare
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} srsran_csi_rs_density_t;
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typedef enum SRSRAN_API {
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srsran_csi_rs_cdm_nocdm = 0,
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srsran_csi_rs_cdm_fd_cdm2,
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srsran_csi_rs_cdm_cdm4_fd2_td2,
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srsran_csi_rs_cdm_cdm8_fd2_td4
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} srsran_csi_rs_cdm_t;
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/**
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* @brief Contains CSI-FrequencyOccupation flattened configuration
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*/
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typedef struct SRSRAN_API {
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uint32_t start_rb; ///< PRB where this CSI resource starts in relation to common resource block #0 (CRB#0) on the
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///< common resource block grid. Only multiples of 4 are allowed (0, 4, ..., 274)
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uint32_t nof_rb; ///< Number of PRBs across which this CSI resource spans. Only multiples of 4 are allowed. The
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///< smallest configurable number is the minimum of 24 and the width of the associated BWP. If the
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///< configured value is larger than the width of the corresponding BWP, the UE shall assume that the
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///< actual CSI-RS bandwidth is equal to the width of the BWP.
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} srsran_csi_rs_freq_occupation_t;
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/**
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* @brief Contains CSI-ResourcePeriodicityAndOffset flattened configuration
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*/
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typedef struct SRSRAN_API {
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uint32_t period; // 4,5,8,10,16,20,32,40,64,80,160,320,640
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uint32_t offset; // 0..period-1
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} srsran_csi_rs_period_and_offset_t;
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/**
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* @brief Contains CSI-RS-ResourceMapping flattened configuration
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*/
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typedef struct SRSRAN_API {
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srsran_csi_rs_resource_mapping_row_t row;
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bool frequency_domain_alloc[SRSRAN_CSI_RS_NOF_FREQ_DOMAIN_ALLOC_MAX];
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uint32_t nof_ports; // 1, 2, 4, 8, 12, 16, 24, 32
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uint32_t first_symbol_idx; // 0..13
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uint32_t first_symbol_idx2; // 2..12 (set to 0 for disabled)
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srsran_csi_rs_cdm_t cdm;
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srsran_csi_rs_density_t density;
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srsran_csi_rs_freq_occupation_t freq_band;
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} srsran_csi_rs_resource_mapping_t;
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/**
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* @brief Contains TS 38.331 NZP-CSI-RS-Resource flattened configuration
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*/
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typedef struct SRSRAN_API {
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uint32_t id;
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srsran_csi_rs_resource_mapping_t resource_mapping; ///< CSI-RS time/frequency mapping
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float power_control_offset; ///< -8..15 dB
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float power_control_offset_ss; ///< -3, 0, 3, 6 dB
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uint32_t scrambling_id; ///< 0..1023
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srsran_csi_rs_period_and_offset_t periodicity; ///< Periodicity
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} srsran_csi_rs_nzp_resource_t;
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/**
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* @brief Non-Zero-Power CSI resource set
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*/
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typedef struct SRSRAN_API {
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srsran_csi_rs_nzp_resource_t data[SRSRAN_PHCH_CFG_MAX_NOF_CSI_RS_PER_SET]; ///< Resources
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uint32_t count; ///< Set to zero for not present
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bool trs_info; ///< Indicates that the antenna port for all NZP-CSI-RS resources in the CSI-RS resource set is same.
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} srsran_csi_rs_nzp_set_t;
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/**
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* @brief Contains TS 38.331 ZP-CSI-RS-Resource flattened configuration
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*/
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typedef struct {
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uint32_t id;
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srsran_csi_rs_resource_mapping_t resource_mapping; ///< CSI-RS time/frequency mapping
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srsran_csi_rs_period_and_offset_t periodicity;
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} srsran_csi_rs_zp_resource_t;
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/**
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* @brief Zero-Power CSI resource set
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*/
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typedef struct SRSRAN_API {
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srsran_csi_rs_zp_resource_t data[SRSRAN_PHCH_CFG_MAX_NOF_CSI_RS_PER_SET]; ///< Resources
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uint32_t count; ///< Number of resources in the set
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} srsran_csi_rs_zp_set_t;
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#endif // SRSRAN_CSI_RS_CFG_H
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