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213 lines
9.2 KiB
C
213 lines
9.2 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: refsignal_ul.h
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*
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* Description: Object to manage uplink reference signals for channel estimation.
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*
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* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 5.5
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*********************************************************************************************/
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#ifndef SRSLTE_REFSIGNAL_UL_H
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#define SRSLTE_REFSIGNAL_UL_H
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#include "srslte/config.h"
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#include "srslte/phy/phch/pucch.h"
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#include "srslte/phy/common/phy_common.h"
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#define SRSLTE_NOF_GROUPS_U 30
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#define SRSLTE_NOF_SEQUENCES_U 2
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#define SRSLTE_NOF_DELTA_SS 30
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#define SRSLTE_NOF_CSHIFT 8
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#define SRSLTE_REFSIGNAL_UL_L(ns_idx, cp) ((ns_idx+1)*SRSLTE_CP_NSYMB(cp)-4)
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/* PUSCH DMRS common configuration (received in SIB2) */
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typedef struct SRSLTE_API {
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uint32_t cyclic_shift;
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uint32_t delta_ss;
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bool group_hopping_en;
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bool sequence_hopping_en;
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}srslte_refsignal_dmrs_pusch_cfg_t;
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typedef struct SRSLTE_API {
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// Common Configuration
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uint32_t subframe_config;
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uint32_t bw_cfg;
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// Dedicated configuration
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uint32_t B;
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uint32_t b_hop;
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uint32_t n_srs;
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uint32_t I_srs;
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uint32_t k_tc;
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uint32_t n_rrc;
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bool configured;
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}srslte_refsignal_srs_cfg_t;
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/** Uplink DeModulation Reference Signal (DMRS) */
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typedef struct SRSLTE_API {
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srslte_cell_t cell;
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srslte_refsignal_dmrs_pusch_cfg_t pusch_cfg;
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srslte_pucch_cfg_t pucch_cfg;
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srslte_refsignal_srs_cfg_t srs_cfg;
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uint32_t n_cs_cell[SRSLTE_NSLOTS_X_FRAME][SRSLTE_CP_NORM_NSYMB];
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float *tmp_arg;
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uint32_t n_prs_pusch[SRSLTE_NOF_DELTA_SS][SRSLTE_NSLOTS_X_FRAME]; // We precompute n_prs needed for cyclic shift alpha at srslte_refsignal_dl_init()
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uint32_t f_gh[SRSLTE_NSLOTS_X_FRAME];
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uint32_t u_pucch[SRSLTE_NSLOTS_X_FRAME];
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uint32_t v_pusch[SRSLTE_NSLOTS_X_FRAME][SRSLTE_NOF_DELTA_SS];
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} srslte_refsignal_ul_t;
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typedef struct {
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cf_t **r[SRSLTE_NOF_CSHIFT][SRSLTE_NSUBFRAMES_X_FRAME];
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} srslte_refsignal_ul_dmrs_pregen_t;
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typedef struct {
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cf_t *r[SRSLTE_NSUBFRAMES_X_FRAME];
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} srslte_refsignal_srs_pregen_t;
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SRSLTE_API int srslte_refsignal_ul_init(srslte_refsignal_ul_t *q,
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uint32_t max_prb);
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SRSLTE_API int srslte_refsignal_ul_set_cell(srslte_refsignal_ul_t *q,
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srslte_cell_t cell);
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SRSLTE_API void srslte_refsignal_ul_free(srslte_refsignal_ul_t *q);
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SRSLTE_API void srslte_refsignal_ul_set_cfg(srslte_refsignal_ul_t *q,
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srslte_refsignal_dmrs_pusch_cfg_t *pusch_cfg,
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srslte_pucch_cfg_t *pucch_cfg,
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srslte_refsignal_srs_cfg_t *srs_cfg);
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SRSLTE_API void srslte_refsignal_r_uv_arg_1prb(float *arg,
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uint32_t u);
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SRSLTE_API uint32_t srslte_refsignal_dmrs_N_rs(srslte_pucch_format_t format,
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srslte_cp_t cp);
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SRSLTE_API uint32_t srslte_refsignal_dmrs_pucch_symbol(uint32_t m,
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srslte_pucch_format_t format,
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srslte_cp_t cp);
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SRSLTE_API bool srslte_refsignal_dmrs_pusch_cfg_isvalid(srslte_refsignal_ul_t *q,
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srslte_refsignal_dmrs_pusch_cfg_t *cfg,
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uint32_t nof_prb);
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SRSLTE_API int srslte_refsignal_dmrs_pusch_pregen_init(srslte_refsignal_ul_t *q,
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srslte_refsignal_ul_dmrs_pregen_t *pregen,
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uint32_t max_prb);
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SRSLTE_API int srslte_refsignal_dmrs_pusch_pregen(srslte_refsignal_ul_t *q,
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srslte_refsignal_ul_dmrs_pregen_t *pregen);
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SRSLTE_API void srslte_refsignal_dmrs_pusch_pregen_free(srslte_refsignal_ul_t *q,
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srslte_refsignal_ul_dmrs_pregen_t *pregen);
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SRSLTE_API int srslte_refsignal_dmrs_pusch_pregen_put(srslte_refsignal_ul_t *q,
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srslte_refsignal_ul_dmrs_pregen_t *pregen,
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uint32_t nof_prb,
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uint32_t sf_idx,
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uint32_t cyclic_shift_for_dmrs,
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uint32_t n_prb[2],
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cf_t *sf_symbols);
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SRSLTE_API int srslte_refsignal_dmrs_pusch_gen(srslte_refsignal_ul_t *q,
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uint32_t nof_prb,
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uint32_t sf_idx,
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uint32_t cyclic_shift_for_dmrs,
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cf_t *r_pusch);
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SRSLTE_API void srslte_refsignal_dmrs_pusch_put(srslte_refsignal_ul_t *q,
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cf_t *r_pusch,
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uint32_t nof_prb,
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uint32_t n_prb[2],
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cf_t *sf_symbols);
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SRSLTE_API void srslte_refsignal_dmrs_pusch_get(srslte_refsignal_ul_t *q,
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cf_t *sf_symbols,
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uint32_t nof_prb,
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uint32_t n_prb[2],
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cf_t *r_pusch);
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SRSLTE_API int srslte_refsignal_dmrs_pucch_gen(srslte_refsignal_ul_t *q,
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srslte_pucch_format_t format,
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uint32_t n_pucch, // n_pucch_1 or n_pucch_2 depending on format
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uint32_t sf_idx,
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uint8_t pucch2_bits[2],
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cf_t *r_pucch);
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SRSLTE_API int srslte_refsignal_dmrs_pucch_put(srslte_refsignal_ul_t* q,
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srslte_pucch_format_t format,
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uint32_t n_pucch,
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cf_t *r_pucch,
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cf_t *output);
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SRSLTE_API int srslte_refsignal_dmrs_pucch_get(srslte_refsignal_ul_t* q,
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srslte_pucch_format_t format,
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uint32_t n_pucch,
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cf_t *input,
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cf_t *r_pucch);
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SRSLTE_API int srslte_refsignal_srs_pregen(srslte_refsignal_ul_t *q,
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srslte_refsignal_srs_pregen_t *pregen);
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SRSLTE_API int srslte_refsignal_srs_pregen_put(srslte_refsignal_ul_t *q,
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srslte_refsignal_srs_pregen_t *pregen,
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uint32_t tti,
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cf_t *sf_symbols);
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SRSLTE_API void srslte_refsignal_srs_pregen_free(srslte_refsignal_ul_t *q,
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srslte_refsignal_srs_pregen_t *pregen);
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SRSLTE_API int srslte_refsignal_srs_gen(srslte_refsignal_ul_t *q,
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uint32_t sf_idx,
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cf_t *r_srs);
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SRSLTE_API int srslte_refsignal_srs_put(srslte_refsignal_ul_t *q,
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uint32_t tti,
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cf_t *r_srs,
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cf_t *sf_symbols);
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SRSLTE_API int srslte_refsignal_srs_send_cs(uint32_t subframe_config,
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uint32_t sf_idx);
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SRSLTE_API int srslte_refsignal_srs_send_ue(uint32_t I_srs,
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uint32_t tti);
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SRSLTE_API uint32_t srslte_refsignal_srs_rb_start_cs(uint32_t bw_cfg,
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uint32_t nof_prb);
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SRSLTE_API uint32_t srslte_refsignal_srs_rb_L_cs(uint32_t bw_cfg,
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uint32_t nof_prb);
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SRSLTE_API uint32_t srslte_refsignal_srs_M_sc(srslte_refsignal_ul_t *q);
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#endif // SRSLTE_REFSIGNAL_UL_H
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