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265 lines
9.6 KiB
C
265 lines
9.6 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsLTE library.
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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: ue_dl.h
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*
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* Description: UE downlink object.
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*
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* This module is a frontend to all the downlink data and control
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* channel processing modules.
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*
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* Reference:
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*****************************************************************************/
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#ifndef UEDL_H
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#define UEDL_H
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#include <stdbool.h>
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#include "srslte/phy/ch_estimation/chest_dl.h"
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#include "srslte/phy/dft/ofdm.h"
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#include "srslte/phy/common/phy_common.h"
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#include "srslte/phy/phch/dci.h"
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#include "srslte/phy/phch/pcfich.h"
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#include "srslte/phy/phch/pdcch.h"
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#include "srslte/phy/phch/pdsch.h"
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#include "srslte/phy/phch/pmch.h"
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#include "srslte/phy/phch/pdsch_cfg.h"
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#include "srslte/phy/phch/phich.h"
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#include "srslte/phy/phch/ra.h"
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#include "srslte/phy/phch/regs.h"
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#include "srslte/phy/sync/cfo.h"
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#include "srslte/phy/utils/vector.h"
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#include "srslte/phy/utils/debug.h"
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#include "srslte/config.h"
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#define MAX_CANDIDATES_UE 16 // From 36.213 Table 9.1.1-1
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#define MAX_CANDIDATES_COM 6 // From 36.213 Table 9.1.1-1
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#define MAX_CANDIDATES (MAX_CANDIDATES_UE + MAX_CANDIDATES_COM)
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typedef struct {
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srslte_dci_format_t format;
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srslte_dci_location_t loc[MAX_CANDIDATES];
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uint32_t nof_locations;
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} dci_blind_search_t;
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typedef struct SRSLTE_API {
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srslte_pcfich_t pcfich;
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srslte_pdcch_t pdcch;
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srslte_pdsch_t pdsch;
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srslte_pmch_t pmch;
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srslte_phich_t phich;
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srslte_regs_t regs;
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srslte_ofdm_t fft[SRSLTE_MAX_PORTS];
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srslte_ofdm_t fft_mbsfn;
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srslte_chest_dl_t chest;
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srslte_cfo_t sfo_correct;
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srslte_pdsch_cfg_t pdsch_cfg;
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srslte_pdsch_cfg_t pmch_cfg;
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srslte_softbuffer_rx_t *softbuffers[SRSLTE_MAX_CODEWORDS];
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srslte_ra_dl_dci_t dl_dci;
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srslte_cell_t cell;
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uint32_t nof_rx_antennas;
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cf_t *sf_symbols; // this is for backwards compatibility
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cf_t *sf_symbols_m[SRSLTE_MAX_PORTS];
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cf_t *ce[SRSLTE_MAX_PORTS]; // compatibility
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cf_t *ce_m[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS];
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/* RI, PMI and SINR for MIMO statistics */
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float sinr[SRSLTE_MAX_LAYERS][SRSLTE_MAX_CODEBOOKS];
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uint32_t pmi[SRSLTE_MAX_LAYERS];
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uint32_t ri;
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/* Power allocation parameter 3GPP 36.213 Clause 5.2 Rho_b */
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float rho_b;
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srslte_dci_format_t dci_format;
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uint64_t pkt_errors;
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uint64_t pkts_total;
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uint64_t pdsch_pkt_errors;
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uint64_t pdsch_pkts_total;
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uint64_t pmch_pkt_errors;
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uint64_t pmch_pkts_total;
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uint64_t nof_detected;
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uint16_t current_rnti;
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uint16_t current_mbsfn_area_id;
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dci_blind_search_t current_ss_ue[3][10];
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dci_blind_search_t current_ss_common[3];
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srslte_dci_location_t last_location;
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srslte_dci_location_t last_location_ul;
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srslte_dci_msg_t pending_ul_dci_msg;
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uint16_t pending_ul_dci_rnti;
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float sample_offset;
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float last_phich_corr;
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}srslte_ue_dl_t;
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/* This function shall be called just after the initial synchronization */
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SRSLTE_API int srslte_ue_dl_init(srslte_ue_dl_t *q,
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cf_t *input[SRSLTE_MAX_PORTS],
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uint32_t max_prb,
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uint32_t nof_rx_antennas);
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SRSLTE_API void srslte_ue_dl_free(srslte_ue_dl_t *q);
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SRSLTE_API int srslte_ue_dl_set_cell(srslte_ue_dl_t *q,
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srslte_cell_t cell);
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int srslte_ue_dl_decode_fft_estimate(srslte_ue_dl_t *q,
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uint32_t sf_idx,
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uint32_t *cfi);
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SRSLTE_API int srslte_ue_dl_decode_fft_estimate_mbsfn(srslte_ue_dl_t *q,
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uint32_t sf_idx,
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uint32_t *cfi,
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srslte_sf_t sf_type);
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SRSLTE_API int srslte_ue_dl_decode_fft_estimate_noguru(srslte_ue_dl_t *q,
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cf_t *input[SRSLTE_MAX_PORTS],
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uint32_t sf_idx,
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uint32_t *cfi);
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SRSLTE_API int srslte_ue_dl_decode_estimate(srslte_ue_dl_t *q,
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uint32_t sf_idx,
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uint32_t *cfi);
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SRSLTE_API int srslte_ue_dl_decode_estimate_mbsfn(srslte_ue_dl_t *q,
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uint32_t sf_idx,
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uint32_t *cfi,
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srslte_sf_t sf_type);
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SRSLTE_API int srslte_ue_dl_cfg_grant(srslte_ue_dl_t *q,
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srslte_ra_dl_grant_t *grant,
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uint32_t cfi,
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uint32_t sf_idx,
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int rvidx[SRSLTE_MAX_CODEWORDS],
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srslte_mimo_type_t mimo_type);
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SRSLTE_API int srslte_ue_dl_find_ul_dci(srslte_ue_dl_t *q,
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uint32_t cfi,
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uint32_t sf_idx,
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uint16_t rnti,
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srslte_dci_msg_t *dci_msg);
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SRSLTE_API int srslte_ue_dl_find_dl_dci(srslte_ue_dl_t *q,
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uint32_t tm,
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uint32_t cfi,
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uint32_t sf_idx,
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uint16_t rnti,
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srslte_dci_msg_t *dci_msg);
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SRSLTE_API int srslte_ue_dl_find_dl_dci_type(srslte_ue_dl_t *q,
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uint32_t tm,
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uint32_t cfi,
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uint32_t sf_idx,
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uint16_t rnti,
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srslte_rnti_type_t rnti_type,
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srslte_dci_msg_t *dci_msg);
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SRSLTE_API uint32_t srslte_ue_dl_get_ncce(srslte_ue_dl_t *q);
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SRSLTE_API void srslte_ue_dl_set_sample_offset(srslte_ue_dl_t * q,
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float sample_offset);
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SRSLTE_API int srslte_ue_dl_decode(srslte_ue_dl_t *q,
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uint8_t *data[SRSLTE_MAX_CODEWORDS],
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uint32_t tm,
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uint32_t tti,
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bool acks[SRSLTE_MAX_CODEWORDS]);
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SRSLTE_API int srslte_ue_dl_decode_rnti(srslte_ue_dl_t *q,
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uint8_t *data[SRSLTE_MAX_CODEWORDS],
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uint32_t tm,
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uint32_t tti,
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uint16_t rnti,
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bool acks[SRSLTE_MAX_CODEWORDS]);
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/* Used by example applications - full PMCH decode for a given MBSFN area ID
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* srslte_ue_dl_decode_fft_estimate_multi,
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* srslte_chest_dl_get_noise_estimate,
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* srslte_ue_dl_cfg_grant,
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* srslte_pmch_decode_multi
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*/
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SRSLTE_API int srslte_ue_dl_decode_mbsfn(srslte_ue_dl_t * q,
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uint8_t *data,
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uint32_t tti);
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SRSLTE_API int srslte_ue_dl_ri_pmi_select(srslte_ue_dl_t *q,
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uint8_t *ri,
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uint8_t *pmi,
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float *current_sinr);
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SRSLTE_API int srslte_ue_dl_ri_select(srslte_ue_dl_t *q,
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uint8_t *ri,
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float *cn);
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SRSLTE_API bool srslte_ue_dl_decode_phich(srslte_ue_dl_t *q,
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uint32_t sf_idx,
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uint32_t n_prb_lowest,
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uint32_t n_dmrs);
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SRSLTE_API void srslte_ue_dl_reset(srslte_ue_dl_t *q);
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SRSLTE_API void srslte_ue_dl_set_rnti(srslte_ue_dl_t *q,
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uint16_t rnti);
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/* Generate signals if required, store in q->current_mbsfn_area_id */
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SRSLTE_API int srslte_ue_dl_set_mbsfn_area_id(srslte_ue_dl_t *q,
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uint16_t mbsfn_area_id);
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SRSLTE_API void srslte_ue_dl_set_non_mbsfn_region(srslte_ue_dl_t *q,
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uint8_t non_mbsfn_region_length);
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SRSLTE_API void srslte_ue_dl_set_power_alloc(srslte_ue_dl_t *q,
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float rho_a,
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float rho_b);
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SRSLTE_API void srslte_ue_dl_save_signal(srslte_ue_dl_t *q,
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srslte_softbuffer_rx_t *softbuffer,
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uint32_t tti,
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uint32_t rv_idx,
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uint16_t rnti,
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uint32_t cfi);
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#endif
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