mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/**
|
|
*
|
|
* \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_SSS_NR_H
|
|
#define SRSRAN_SSS_NR_H
|
|
|
|
#include "srsran/config.h"
|
|
#include "srsran/phy/common/phy_common_nr.h"
|
|
#include <inttypes.h>
|
|
|
|
/**
|
|
* @brief NR SSS sequence length in frequency domain
|
|
*/
|
|
#define SRSRAN_SSS_NR_LEN 127
|
|
|
|
/**
|
|
* @brief NR SSS Symbol number
|
|
*/
|
|
#define SRSRAN_SSS_NR_SYMBOL_IDX 2
|
|
|
|
/**
|
|
* @brief Put NR SSS sequence in the SSB grid
|
|
* @remark Described in TS 38.211 section 7.4.2.3 Secondary synchronization signal
|
|
* @param ssb_grid SSB resource grid
|
|
* @param N_id_1 Physical cell ID 1
|
|
* @param N_id_2 Physical cell ID 2
|
|
* @param beta SSS power allocation
|
|
* @return SRSLTE_SUCCESS if the parameters are valid, SRSLTE_ERROR code otherwise
|
|
*/
|
|
SRSRAN_API int srsran_sss_nr_put(cf_t ssb_grid[SRSRAN_SSB_NOF_RE], uint32_t N_id_1, uint32_t N_id_2, float beta);
|
|
|
|
/**
|
|
* @brief Extracts the NR SSS Least Square Estimates (LSE) from the SSB grid
|
|
* @param ssb_grid received SSB resource grid
|
|
* @param N_id_1 Physical cell ID 1
|
|
* @param N_id_2 Physical cell ID 2
|
|
* @param lse Provides LSE pointer
|
|
* @return SRSLTE_SUCCESS if the parameters are valid, SRSLTE_ERROR code otherwise
|
|
*/
|
|
SRSRAN_API int
|
|
srsran_sss_nr_extract_lse(const cf_t* ssb_grid, uint32_t N_id_1, uint32_t N_id_2, cf_t lse[SRSRAN_SSS_NR_LEN]);
|
|
|
|
/**
|
|
* @brief Find the best SSS sequence given the N_id_2 and the SSB resource grid
|
|
* @attention Assumes the SSB is synchronized and the average delay is pre-compensated
|
|
* @param ssb_grid The SSB resource grid to search
|
|
* @param N_id_2 Fix N_id_2 to search, it reduces the search space 1/3
|
|
* @param norm_corr Normalised correlation of the best found sequence
|
|
* @param found_N_id_1 The N_id_1 of the best sequence
|
|
* @return SRSLTE_SUCCESS if the parameters are valid, SRSLTE_ERROR code otherwise
|
|
*/
|
|
SRSRAN_API int
|
|
srsran_sss_nr_find(const cf_t ssb_grid[SRSRAN_SSB_NOF_RE], uint32_t N_id_2, float* norm_corr, uint32_t* found_N_id_1);
|
|
|
|
#endif // SRSRAN_SSS_NR_H
|