/** * * \section COPYRIGHT * * Copyright 2013-2021 Software Radio Systems Limited * * By using this file, you agree to the terms and conditions set * forth in the LICENSE file which can be found at the top level of * the distribution. * */ #ifndef SRSRAN_PHY_COMMON_NR_H #define SRSRAN_PHY_COMMON_NR_H #include "phy_common.h" #include #ifdef __cplusplus extern "C" { #endif /** * @brief Defines the number of symbols per slot. Defined by TS 38.211 v15.8.0 Table 4.3.2-1. */ #define SRSRAN_NSYMB_PER_SLOT_NR 14U /** * @brief Defines the resource grid size in physical resource elements (frequency and time domain) */ #define SRSRAN_SLOT_LEN_RE_NR(nof_prb) (nof_prb * SRSRAN_NRE * SRSRAN_NSYMB_PER_SLOT_NR) /** * @brief Minimum subframe length in samples for a given number of PRB */ #define SRSRAN_SF_LEN_PRB_NR(nof_prb) (srsran_min_symbol_sz_rb(nof_prb) * 15) #define SRSRAN_SLOT_MAX_LEN_RE_NR (SRSRAN_SLOT_LEN_RE_NR(SRSRAN_MAX_PRB_NR)) #define SRSRAN_MAX_LAYERS_NR 8 /** * @brief Defines the maximum numerology supported. Defined by TS 38.211 v15.8.0 Table 4.3.2-1. */ #define SRSRAN_NR_MAX_NUMEROLOGY 4U /** * @brief Defines the symbol duration, including cyclic prefix */ #define SRSRAN_SUBC_SPACING_NR(NUM) (15000U << (uint32_t)(NUM)) /** * @brief Defines the number of slots per SF. Defined by TS 38.211 v15.8.0 Table 4.3.2-1. */ #define SRSRAN_NSLOTS_PER_SF_NR(NUM) (1U << (NUM)) /** * @brief Defines the number of slots per frame. Defined by TS 38.211 v15.8.0 Table 4.3.2-1. */ #define SRSRAN_NSLOTS_PER_FRAME_NR(NUM) (SRSRAN_NSLOTS_PER_SF_NR(NUM) * SRSRAN_NOF_SF_X_FRAME) /** * @brief Bounds slot index into the frame */ #define SRSRAN_SLOT_NR_MOD(NUM, N) ((N) % SRSRAN_NSLOTS_PER_FRAME_NR(NUM)) /** * @brief Maximum Carrier identification value. Defined by TS 38.331 v15.10.0 as PhysCellId from 0 to 1007. */ #define SRSRAN_MAX_ID_NR 1007 /** * @brief Maximum number of physical resource blocks (PRB) that a 5G NR can have. This is defined by TS 38.331 v15.10.0 * as maxNrofPhysicalResourceBlocks */ #define SRSRAN_MAX_PRB_NR 275 /** * @brief Maximum start sub-carrier index for the carrier relative point */ #define SRSRAN_MAX_START_NR 2199 /** * @brief defines the maximum number of Aggregation levels: 1, 2, 4, 8 and 16 */ #define SRSRAN_SEARCH_SPACE_NOF_AGGREGATION_LEVELS_NR 5 /** * @brief defines the maximum number of RE */ #define SRSRAN_PDCCH_MAX_RE ((SRSRAN_NRE - 3U) * (1U << (SRSRAN_SEARCH_SPACE_NOF_AGGREGATION_LEVELS_NR - 1U)) * 6U) /** * @brief defines the maximum number of candidates for a given search-space and aggregation level according to TS 38.331 * SearchSpace sequence */ #define SRSRAN_SEARCH_SPACE_MAX_NOF_CANDIDATES_NR 8 /** * @brief defines the maximum number of monitored PDCCH candidates per slot and per serving cell according to TS 38.213 * Table 10.1-2 */ #define SRSRAN_MAX_NOF_CANDIDATES_SLOT_NR 44 /** * @brief defines the maximum number of resource elements per PRB * @remark Defined in TS 38.214 V15.10.0 5.1.3.2 Transport block size determination, point 1, second bullet */ #define SRSRAN_MAX_NRE_NR 156 /** * @brief defines the maximum number of resource elements in a PDSCH transmission * @remark deduced from in TS 36.214 V15.10.0 5.1.3.2 Transport block size determination */ #define SRSRAN_PDSCH_MAX_RE_NR (SRSRAN_MAX_NRE_NR * SRSRAN_MAX_PRB_NR) /** * @brief defines the maximum number of bits that can be transmitted in a slot */ #define SRSRAN_SLOT_MAX_NOF_BITS_NR (SRSRAN_PDSCH_MAX_RE_NR * SRSRAN_MAX_QM) /** * @brief Maximum number of PDSCH time domain resource allocations. This is defined by TS 38.331 v15.10.0 * as maxNrofDL-Allocations */ #define SRSRAN_MAX_NOF_TIME_RA 16 /** * @brief Maximum dl-DataToUL-ACK value. This is defined by TS 38.331 v15.10.1 in PUCCH-Config */ #define SRSRAN_MAX_NOF_DL_DATA_TO_UL 8 /** * @brief Maximum number of HARQ processes in the DL, signaled through RRC (PDSCH-ServingCellConfig) */ #define SRSRAN_MAX_HARQ_PROC_DL_NR 16 // 3GPP TS 38.214 version 15.3.0 Sec. 5.1 or nrofHARQ-ProcessesForPDSCH /** * @brief Default number of HARQ processes in the DL, if config is absent. */ #define SRSRAN_DEFAULT_HARQ_PROC_DL_NR 8 /** * @brief Maximum number of HARQ processes in the UL, signaled through RRC (ConfiguredGrantConfig) */ #define SRSRAN_MAX_HARQ_PROC_UL_NR 16 // 3GPP TS 38.214 version 15.3.0 Sec. 6.1 /** * @brief SSB bandwidth in subcarriers, described in TS 38.211 section 7.4.3.1 Time-frequency structure of an SS/PBCH * block */ #define SRSRAN_SSB_BW_SUBC 240 /** * @brief SSB duration in symbols, described in TS 38.211 section 7.4.3.1 Time-frequency structure of an SS/PBCH block */ #define SRSRAN_SSB_DURATION_NSYMB 4 /** * @brief Number of NR N_id_1 Physical Cell Identifier (PCI) as described in TS 38.211 section 7.4.2.1 Physical-layer * cell identities */ #define SRSRAN_NOF_NID_1_NR 336 /** * @brief Number of NR N_id_2 Physical Cell Identifier (PCI) as described in TS 38.211 section 7.4.2.1 Physical-layer * cell identities */ #define SRSRAN_NOF_NID_2_NR 3 /** * @brief Number of NR N_id Physical Cell Identifier (PCI) as described in TS 38.211 section 7.4.2.1 Physical-layer * cell identities */ #define SRSRAN_NOF_NID_NR (SRSRAN_NOF_NID_1_NR * SRSRAN_NOF_NID_2_NR) /** * @brief Compute N_id_1 from the Physical Cell Identifier (PCI) as described in TS 38.211 section 7.4.2.1 * Physical-layer cell identities */ #define SRSRAN_NID_1_NR(N_ID) ((N_ID) / SRSRAN_NOF_NID_2_NR) /** * @brief Compute N_id_2 from the Physical Cell Identifier (PCI) as described in TS 38.211 section 7.4.2.1 * Physical-layer cell identities */ #define SRSRAN_NID_2_NR(N_ID) ((N_ID) % SRSRAN_NOF_NID_2_NR) /** * @brief Compute Physical Cell Identifier (PCI) N_id from N_id_1 and N_id_2 */ #define SRSRAN_NID_NR(NID_1, NID_2) (SRSRAN_NOF_NID_2_NR * (NID_1) + (NID_2)) /** * @brief SSB number of resource elements, described in TS 38.211 section 7.4.3.1 Time-frequency structure of an SS/PBCH * block */ #define SRSRAN_SSB_NOF_RE (SRSRAN_SSB_BW_SUBC * SRSRAN_SSB_DURATION_NSYMB) /** * @brief Symbol index with extended CP */ #define SRSRAN_EXT_CP_SYMBOL(SCS) (7U << (uint32_t)(SCS)) typedef enum SRSRAN_API { srsran_coreset_mapping_type_non_interleaved = 0, srsran_coreset_mapping_type_interleaved, } srsran_coreset_mapping_type_t; typedef enum SRSRAN_API { srsran_coreset_bundle_size_n2 = 0, srsran_coreset_bundle_size_n3, srsran_coreset_bundle_size_n6, } srsran_coreset_bundle_size_t; typedef enum SRSRAN_API { srsran_coreset_precoder_granularity_contiguous = 0, srsran_coreset_precoder_granularity_reg_bundle } srsran_coreset_precoder_granularity_t; /** * @brief PDSCH mapping type * @remark Described in TS 38.331 V15.10.0 Section PDSCH-TimeDomainResourceAllocationList */ typedef enum SRSRAN_API { srsran_sch_mapping_type_A = 0, srsran_sch_mapping_type_B } srsran_sch_mapping_type_t; /** * @brief Search Space (SS) type * @remark Described in TS 38.213 V15.10.0 Section 10.1 UE procedure for determining physical downlink control channel * assignment */ typedef enum SRSRAN_API { srsran_search_space_type_common_0 = 0, ///< configured by pdcch-ConfigSIB1 in MIB or by searchSpaceSIB1 in ///< PDCCH-ConfigCommon or by searchSpaceZero in PDCCH-ConfigCommon srsran_search_space_type_common_0A, ///< configured by searchSpaceOtherSystemInformation in PDCCH-ConfigCommon srsran_search_space_type_common_1, ///< configured by ra-SearchSpace in PDCCH-ConfigCommon srsran_search_space_type_common_2, ///< configured by pagingSearchSpace in PDCCH-ConfigCommon srsran_search_space_type_common_3, ///< configured by SearchSpace in PDCCH-Config with searchSpaceType = common srsran_search_space_type_ue, ///< configured by SearchSpace in PDCCH-Config with searchSpaceType = ue-Specific srsran_search_space_type_rar, ///< Indicates that a grant was given by MAC RAR as described in TS 38.213 clause 8.2 srsran_search_space_type_cg ///< Indicates that a grant was given by Configured Grant from the upper layers } srsran_search_space_type_t; /** * @brief Helper macro to get if a search space type is common or not */ #define SRSRAN_SEARCH_SPACE_IS_COMMON(SS_TYPE) ((SS_TYPE) < srsran_search_space_type_ue) /** * @brief RAR content length in bits (see TS 38.321 Sec 6.2.3) */ #define SRSRAN_RAR_UL_GRANT_NBITS (27) /** * @brief Indicates the MCS table the UE shall use for PDSCH and/or PUSCH without transform precoding */ typedef enum SRSRAN_API { srsran_mcs_table_64qam = 0, srsran_mcs_table_256qam, srsran_mcs_table_qam64LowSE, srsran_mcs_table_N } srsran_mcs_table_t; /** * @brief RNTI types * @remark Usage described in TS 38.321 Table 7.1-2: RNTI usage. */ typedef enum SRSRAN_API { srsran_rnti_type_c = 0, srsran_rnti_type_p, ///< @brief Paging and System Information change notification (PCH) srsran_rnti_type_si, ///< @brief Broadcast of System Information (DL-SCH) srsran_rnti_type_ra, ///< @brief Random Access Response (DL-SCH) srsran_rnti_type_tc, ///< @brief Contention Resolution (when no valid C-RNTI is available) (DL-SCH) srsran_rnti_type_cs, ///< @brief Configured scheduled unicast transmission (DL-SCH, UL-SCH) srsran_rnti_type_sp_csi, ///< @brief Activation of Semi-persistent CSI reporting on PUSCH srsran_rnti_type_mcs_c, ///< @brief Dynamically scheduled unicast transmission (DL-SCH) } srsran_rnti_type_t; /** * @brief DCI formats * @remark Described in TS 38.212 V15.9.0 Section 7.3.1 DCI formats */ typedef enum SRSRAN_API { srsran_dci_format_nr_0_0 = 0, ///< @brief Scheduling of PUSCH in one cell srsran_dci_format_nr_0_1, ///< @brief Scheduling of PUSCH in one cell srsran_dci_format_nr_1_0, ///< @brief Scheduling of PDSCH in one cell srsran_dci_format_nr_1_1, ///< @brief Scheduling of PDSCH in one cell srsran_dci_format_nr_2_0, ///< @brief Notifying a group of UEs of the slot format srsran_dci_format_nr_2_1, ///< @brief Notifying a group of UEs of the PRB(s) and OFDM symbol(s) where UE may assume no ///< transmission is intended for the UE srsran_dci_format_nr_2_2, ///< @brief Transmission of TPC commands for PUCCH and PUSCH srsran_dci_format_nr_2_3, ///< @brief Transmission of a group of TPC commands for SRS transmissions by one or more UEs srsran_dci_format_nr_rar, ///< @brief Scheduling a transmission of PUSCH from RAR srsran_dci_format_nr_cg, ///< @brief Scheduling of PUSCH using a configured grant SRSRAN_DCI_FORMAT_NR_COUNT ///< @brief Number of DCI formats } srsran_dci_format_nr_t; /** * @brief Overhead configuration provided by higher layers * @remark Described in TS 38.331 V15.10.0 PDSCH-ServingCellConfig * @remark Described in TS 38.331 V15.10.0 PUSCH-ServingCellConfig */ typedef enum SRSRAN_API { srsran_xoverhead_0 = 0, srsran_xoverhead_6, srsran_xoverhead_12, srsran_xoverhead_18 } srsran_xoverhead_t; /** * @brief PDSCH HARQ ACK codebook configuration * @remark Described in TS 38.331 V15.10.0 PhysicalCellGroupConfig */ typedef enum SRSRAN_API { srsran_pdsch_harq_ack_codebook_none = 0, srsran_pdsch_harq_ack_codebook_semi_static, srsran_pdsch_harq_ack_codebook_dynamic, } srsran_harq_ack_codebook_t; /** * @brief PDSCH/PUSCH Resource allocation configuration * @remark Described in TS 38.331 V15.10.0 PhysicalCellGroupConfig */ typedef enum SRSRAN_API { srsran_resource_alloc_type0 = 0, srsran_resource_alloc_type1, srsran_resource_alloc_dynamic, } srsran_resource_alloc_t; /** * @brief Subcarrier spacing 15 or 30 kHz <6GHz and 60 or 120 kHz >6GHz * @remark Described in TS 38.331 V15.10.0 subcarrier spacing */ typedef enum SRSRAN_API { srsran_subcarrier_spacing_15kHz = 0, srsran_subcarrier_spacing_30kHz, srsran_subcarrier_spacing_60kHz, srsran_subcarrier_spacing_120kHz, srsran_subcarrier_spacing_240kHz, srsran_subcarrier_spacing_invalid } srsran_subcarrier_spacing_t; typedef enum SRSRAN_API { SRSRAN_SSB_PATTERN_A = 0, // FR1, 15 kHz SCS SRSRAN_SSB_PATTERN_B, // FR1, 30 kHz SCS SRSRAN_SSB_PATTERN_C, // FR1, 30 kHz SCS SRSRAN_SSB_PATTERN_D, // FR2, 120 kHz SCS SRSRAN_SSB_PATTERN_E, // FR2, 240 kHz SCS SRSRAN_SSB_PATTERN_INVALID, } srsran_ssb_patern_t; typedef enum SRSRAN_API { SRSRAN_DUPLEX_MODE_FDD = 0, // Paired SRSRAN_DUPLEX_MODE_TDD, // Unpaired SRSRAN_DUPLEX_MODE_SDL, // Supplementary DownLink SRSRAN_DUPLEX_MODE_SUL, // Supplementary UpLink SRSRAN_DUPLEX_MODE_INVALID } srsran_duplex_mode_t; /** * @brief NR carrier parameters. It is a combination of fixed cell and bandwidth-part (BWP) */ typedef struct SRSRAN_API { uint32_t pci; uint32_t absolute_frequency_ssb; uint32_t dl_absolute_frequency_point_a; uint32_t ul_absolute_frequency_point_a; uint32_t offset_to_carrier; ///< Offset between point A and the lowest subcarrier of the lowest RB srsran_subcarrier_spacing_t scs; uint32_t nof_prb; ///< @brief See TS 38.101-1 Table 5.3.2-1 for more details uint32_t start; uint32_t max_mimo_layers; ///< @brief DL: Indicates the maximum number of MIMO layers to be used for PDSCH in all BWPs ///< of this serving cell. (see TS 38.212 [17], clause 5.4.2.1). UL: Indicates the maximum ///< MIMO layer to be used for PUSCH in all BWPs of the normal UL of this serving cell (see ///< TS 38.212 [17], clause 5.4.2.1) } srsran_carrier_nr_t; /** * @brief NR Slot parameters. It contains parameters that change in a slot basis. */ typedef struct SRSRAN_API { /// Slot index in the radio frame uint32_t idx; /// Left for future parameters /// ... } srsran_slot_cfg_t; /** * @brief Min number of OFDM symbols in a control resource set. */ #define SRSRAN_CORESET_DURATION_MIN 1 /** * @brief Max number of OFDM symbols in a control resource set. Specified in TS 38.331 V15.10.0 as maxCoReSetDuration */ #define SRSRAN_CORESET_DURATION_MAX 3 /** * @brief Number of possible CORESET frequency resources. */ #define SRSRAN_CORESET_FREQ_DOMAIN_RES_SIZE 45 /** * @brief Max value for shift index */ #define SRSRAN_CORESET_SHIFT_INDEX_MAX (SRSRAN_CORESET_NOF_PRB_MAX - 1) /** * @brief CORESET parameters as defined in TS 38.331 V15.10.0 - ControlResourceSet */ typedef struct SRSRAN_API { uint32_t id; srsran_coreset_mapping_type_t mapping_type; uint32_t duration; bool freq_resources[SRSRAN_CORESET_FREQ_DOMAIN_RES_SIZE]; bool dmrs_scrambling_id_present; uint32_t dmrs_scrambling_id; srsran_coreset_precoder_granularity_t precoder_granularity; srsran_coreset_bundle_size_t interleaver_size; ///< Referenced in TS 38.211 section 7.3.2.2 as R srsran_coreset_bundle_size_t reg_bundle_size; ///< Referenced in TS 38.211 section 7.3.2.2 as L uint32_t shift_index; uint32_t offset_rb; ///< Integer offset in resource blocks from the pointA (lowest subcarrier of resource grid) to the ///< lowest resource block of the CORESET region (used by CORESET Zero only) /** Missing TCI parameters */ } srsran_coreset_t; /** * @brief SearchSpace parameters as defined in TS 38.331 v15.10.0 SearchSpace sequence */ typedef struct SRSRAN_API { uint32_t id; uint32_t coreset_id; uint32_t duration; ///< SS duration length in slots srsran_search_space_type_t type; ///< Sets the SS type, common (multiple types) or UE specific srsran_dci_format_nr_t formats[SRSRAN_DCI_FORMAT_NR_COUNT]; ///< Specifies the DCI formats that shall be searched uint32_t nof_formats; uint32_t nof_candidates[SRSRAN_SEARCH_SPACE_NOF_AGGREGATION_LEVELS_NR]; } srsran_search_space_t; /** * @brief TDD pattern configuration */ typedef struct SRSRAN_API { uint32_t period_ms; ///< Period in milliseconds, set to 0 if not present uint32_t nof_dl_slots; ///< Number of consecutive full DL slots at the beginning of each DL-UL pattern uint32_t nof_dl_symbols; ///< Number of consecutive DL symbols in the beginning of the slot following the last DL slot uint32_t nof_ul_slots; ///< Number of consecutive full UL slots at the end of each DL-UL pattern uint32_t nof_ul_symbols; ///< Number of consecutive UL symbols in the end of the slot preceding the first full UL slot } srsran_tdd_pattern_t; /** * @brief TDD configuration as described in TS 38.331 v15.10.0 TDD-UL-DL-ConfigCommon */ typedef struct SRSRAN_API { srsran_tdd_pattern_t pattern1; srsran_tdd_pattern_t pattern2; } srsran_tdd_config_nr_t; /** * @brief Describes a measurement based on NZP-CSI-RS or SSB-CSI * @note Used for tracking RSRP, SNR, CFO, SFO, and so on * @note srsran_csi_channel_measurements_t is used for CSI report generation */ typedef struct SRSRAN_API { float rsrp; ///< Linear scale RSRP float rsrp_dB; ///< Logarithm scale RSRP relative to full-scale float epre; ///< Linear scale EPRE float epre_dB; ///< Logarithm scale EPRE relative to full-scale float n0; ///< Linear noise level float n0_dB; ///< Logarithm scale noise level relative to full-scale float snr_dB; ///< Signal to noise ratio in decibels float cfo_hz; ///< Carrier frequency offset in Hz. Only set if more than 2 symbols are available in a TRS set float cfo_hz_max; ///< Maximum CFO in Hz that can be measured. It is set to 0 if CFO cannot be estimated float delay_us; ///< Average measured delay in microseconds uint32_t nof_re; ///< Number of available RE for the measurement, it can be used for weighting among different ///< measurements } srsran_csi_trs_measurements_t; /** * @brief Get the RNTI type name for NR * @param rnti_type RNTI type name * @return Constant string with the RNTI type name */ SRSRAN_API const char* srsran_rnti_type_str(srsran_rnti_type_t rnti_type); /** * @brief Get the short RNTI type name for NR * @param rnti_type RNTI type name * @return Constant string with the short RNTI type name */ SRSRAN_API const char* srsran_rnti_type_str_short(srsran_rnti_type_t rnti_type); /** * @brief Get the RNTI type name for NR * @param rnti_type RNTI type name * @return Constant string with the RNTI type name */ SRSRAN_API const char* srsran_dci_format_nr_string(srsran_dci_format_nr_t format); /** * @brief Calculates the bandwidth of a given CORESET in physical resource blocks (PRB) . This function uses the * frequency domain resources bit-map for counting the number of PRB. * * @attention Prior to this function call, the frequency domain resources bit-map shall be zeroed beyond the * carrier.nof_prb / 6 index, otherwise the CORESET bandwidth might be greater than the carrier. * * @param coreset provides the given CORESET configuration * @return The number of PRB that the CORESET takes in frequency domain */ SRSRAN_API uint32_t srsran_coreset_get_bw(const srsran_coreset_t* coreset); /** * @brief Calculates the number of Physical Resource Elements (time and frequency domain) that a given CORESET uses. * This function uses the frequency domain resources bit-map and duration to compute the number of symbols. * * @attention Prior to this function call, the frequency domain resources bit-map shall be zeroed beyond the * carrier.nof_prb / 6 index, otherwise the CORESET bandwidth might be greater than the carrier. * * @param coreset provides the given CORESET configuration * @return The number of resource elements that compose the coreset */ SRSRAN_API uint32_t srsran_coreset_get_sz(const srsran_coreset_t* coreset); /** * @brief Calculates the starting resource block index in the resource grid * * @remark Intended to be used for common search space as specifies the lat clause in TS 38.214 section 5.1.2.2 Resource * allocation in frequency domain * * @param coreset provides the given CORESET configuration * @return The index of the lowest resource block in the resource grid used by the given CORESET if the CORESET * configuration is valid; Otherwise, 0. */ SRSRAN_API uint32_t srsran_coreset_start_rb(const srsran_coreset_t* coreset); /** * @brief Get the NR PDSCH mapping type in string * @param mapping_type Mapping type * @return Constant string with PDSCH mapping type */ SRSRAN_API const char* srsran_sch_mapping_type_to_str(srsran_sch_mapping_type_t mapping_type); /** * @brief Get the MCS table string * @param mcs_table MCS table value * @return Constant string with the MCS table name */ SRSRAN_API const char* srsran_mcs_table_to_str(srsran_mcs_table_t mcs_table); /** * @brief Get the MCS table value from a string * @param str Points to a given string * @return The MCS table value */ SRSRAN_API srsran_mcs_table_t srsran_mcs_table_from_str(const char* str); /** * @brief Computes the minimum valid symbol size for a given amount of PRB * @attention The valid FFT sizes are radix 2 and radix 3 between 128 to 4096 points. * @param nof_prb Number of PRB * @return The minimum valid FFT size if the number of PRB is in range, 0 otherwise */ SRSRAN_API uint32_t srsran_min_symbol_sz_rb(uint32_t nof_prb); /** * @brief Computes the time in seconds between the beginning of the slot and the given symbol * @remark All symbol size reference and values are taken from TS 38.211 section 5.3 OFDM baseband signal generation * @param l Given symbol index * @param scs Subcarrier spacing * @return Returns the symbol time offset in seconds */ SRSRAN_API float srsran_symbol_offset_s(uint32_t l, srsran_subcarrier_spacing_t scs); /** * @brief Computes the time in seconds between two symbols in a slot * @note l0 is expected to be smaller than l1 * @remark All symbol size reference and values are taken from TS 38.211 section 5.3 OFDM baseband signal generation * @param l0 First symbol index within the slot * @param l1 Second symbol index within the slot * @param scs Subcarrier spacing * @return Returns the time in seconds between the two symbols if the condition above is satisfied, 0 seconds otherwise */ SRSRAN_API float srsran_symbol_distance_s(uint32_t l0, uint32_t l1, srsran_subcarrier_spacing_t scs); /** * @brief Decides whether a given slot is configured as Downlink * @param cfg Provides TDD configuration * @param numerology Provides BWP numerology * @param slot_idx Slot index in the frame for the given numerology * @return true if the provided slot index is configured for Downlink */ SRSRAN_API bool srsran_tdd_nr_is_dl(const srsran_tdd_config_nr_t* cfg, uint32_t numerology, uint32_t slot_idx); /** * @brief Decides whether a given slot is configured as Uplink * @param cfg Provides TDD configuration * @param numerology Provides BWP numerology * @param slot_idx Slot index in the frame for the given numerology * @return true if the provided slot index is configured for Uplink */ SRSRAN_API bool srsran_tdd_nr_is_ul(const srsran_tdd_config_nr_t* cfg, uint32_t numerology, uint32_t slot_idx); SRSRAN_API int srsran_carrier_to_cell(const srsran_carrier_nr_t* carrier, srsran_cell_t* cell); /** * @brief Writes Channel State Information measurement into a string * @param meas Provides the measurement * @param str Provides string * @param str_len Maximum string length * @return The number of writen characters */ SRSRAN_API uint32_t srsran_csi_meas_info(const srsran_csi_trs_measurements_t* meas, char* str, uint32_t str_len); /** * @brief Converts a given string into a subcarrier spacing * @param str Provides the string * @return A valid subcarrier if the string is valid, srsran_subcarrier_spacing_invalid otherwise */ SRSRAN_API srsran_subcarrier_spacing_t srsran_subcarrier_spacing_from_str(const char* str); /** * @brief Converts a given subcarrier spacing to string * @param scs Subcarrier spacing * @return A constant string pointer */ SRSRAN_API const char* srsran_subcarrier_spacing_to_str(srsran_subcarrier_spacing_t scs); /** * @brief Combine Channel State Information from Tracking Reference Signals (CSI-TRS) * @param[in] a CSI-RS measurement * @param[in] b CSI-RS measurement * @param[out] dst Destination of the combined */ SRSRAN_API void srsran_combine_csi_trs_measurements(const srsran_csi_trs_measurements_t* a, const srsran_csi_trs_measurements_t* b, srsran_csi_trs_measurements_t* dst); /** * @brief Setup CORESET Zero from a configuration index * @remark Defined by TS 38.213 tables 13-1, 13-2, 13-3, 13-4, 13-5, 13-6, 13-7, 13-8, 13-9, 13-10 * @param n_cell_id Physical Cell identifier * @param ssb_pointA_freq_offset_Hz Integer frequency offset in Hz between the SS/PBCH block center and pointA * @param ssb_scs SS/PBCH block subcarrier spacing * @param pdcch_scs PDCCH subcarrier spacing * @param idx CORESET Zero configuration index * @param[out] coreset Points to the resultant CORESET * @return SRSRAN_SUCCESS if the given inputs lead to a valid CORESET configuration, otherise SRSRAN_ERROR code */ SRSRAN_API int srsran_coreset_zero(uint32_t n_cell_id, uint32_t ssb_pointA_freq_offset_Hz, srsran_subcarrier_spacing_t ssb_scs, srsran_subcarrier_spacing_t pdcch_scs, uint32_t idx, srsran_coreset_t* coreset); #ifdef __cplusplus } #endif #endif // SRSRAN_PHY_COMMON_NR_H