mirror of https://github.com/PentHertz/srsLTE.git
112 lines
3.7 KiB
C
112 lines
3.7 KiB
C
/*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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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_cell_search.h
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*
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* Description: Wrapper for the ue_sync object.
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*
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* This object is a wrapper to the ue_sync object. It receives
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* several synchronized frames and obtains the most common cell_id
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* and cp length.
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*
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* The I/O stream device sampling frequency must be set to 1.92 MHz
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* (SRSLTE_CS_SAMP_FREQ constant) before calling to
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* srslte_ue_cellsearch_scan() functions.
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*
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* Reference:
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*****************************************************************************/
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#ifndef SRSLTE_UE_CELL_SEARCH_H
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#define SRSLTE_UE_CELL_SEARCH_H
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#include <stdbool.h>
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#include "srslte/config.h"
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#include "srslte/phy/ue/ue_sync.h"
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#include "srslte/phy/ue/ue_mib.h"
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#include "srslte/phy/sync/cfo.h"
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#include "srslte/phy/ch_estimation/chest_dl.h"
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#include "srslte/phy/phch/pbch.h"
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#include "srslte/phy/dft/ofdm.h"
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#define SRSLTE_CS_NOF_PRB 6
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#define SRSLTE_CS_SAMP_FREQ 1920000.0
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typedef struct SRSLTE_API {
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uint32_t cell_id;
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srslte_cp_t cp;
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srslte_frame_type_t frame_type;
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float peak;
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float mode;
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float psr;
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float cfo;
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} srslte_ue_cellsearch_result_t;
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typedef struct SRSLTE_API {
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srslte_ue_sync_t ue_sync;
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cf_t* sf_buffer[SRSLTE_MAX_CHANNELS];
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uint32_t nof_rx_antennas;
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uint32_t max_frames;
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uint32_t nof_valid_frames; // number of 5 ms frames to scan
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uint32_t *mode_ntimes;
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uint8_t *mode_counted;
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srslte_ue_cellsearch_result_t *candidates;
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} srslte_ue_cellsearch_t;
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SRSLTE_API int srslte_ue_cellsearch_init(srslte_ue_cellsearch_t *q,
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uint32_t max_frames_total,
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int (recv_callback)(void*, void*, uint32_t,srslte_timestamp_t*),
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void *stream_handler);
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SRSLTE_API int
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srslte_ue_cellsearch_init_multi(srslte_ue_cellsearch_t* q,
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uint32_t max_frames_total,
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int(recv_callback)(void*, cf_t* [SRSLTE_MAX_CHANNELS], uint32_t, srslte_timestamp_t*),
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uint32_t nof_rx_antennas,
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void* stream_handler);
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SRSLTE_API void srslte_ue_cellsearch_free(srslte_ue_cellsearch_t *q);
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SRSLTE_API int srslte_ue_cellsearch_scan_N_id_2(srslte_ue_cellsearch_t *q,
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uint32_t N_id_2,
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srslte_ue_cellsearch_result_t *found_cell);
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SRSLTE_API int srslte_ue_cellsearch_scan(srslte_ue_cellsearch_t * q,
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srslte_ue_cellsearch_result_t found_cells[3],
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uint32_t *max_N_id_2);
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SRSLTE_API int srslte_ue_cellsearch_set_nof_valid_frames(srslte_ue_cellsearch_t *q,
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uint32_t nof_frames);
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#endif // SRSLTE_UE_CELL_SEARCH_H
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