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/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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#ifndef SRSUE_SLOT_SYNC_H
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#define SRSUE_SLOT_SYNC_H
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#include "srsran/interfaces/radio_interfaces.h"
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#include "srsran/interfaces/ue_nr_interfaces.h"
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#include "srsran/radio/rf_buffer.h"
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#include "srsran/radio/rf_timestamp.h"
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#include "srsran/srsran.h"
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namespace srsue {
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namespace nr {
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class slot_sync
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{
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public:
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struct args_t {
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double max_srate_hz = 1.92e6;
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uint32_t nof_rx_channels = 1;
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srsran_subcarrier_spacing_t ssb_min_scs = srsran_subcarrier_spacing_15kHz;
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bool disable_cfo = false;
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float pbch_dmrs_thr = 0.0f; ///< PBCH DMRS correlation detection threshold (0 means auto)
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float cfo_alpha = 0.0f; ///< CFO averaging alpha (0 means auto)
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int thread_priority = -1;
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};
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slot_sync(stack_interface_phy_sa_nr& stack_, srsran::radio_interface_phy& radio_);
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~slot_sync();
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bool init(const args_t& args);
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int recv_callback(srsran::rf_buffer_t& rf_buffer, srsran_timestamp_t* timestamp);
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void run_stack_tti();
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private:
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const static int MIN_TTI_JUMP = 1; ///< Time gap reported to stack after receiving subframe
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const static int MAX_TTI_JUMP = 1000; ///< Maximum time gap tolerance in RF stream metadata
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enum { SEARCHING = 0, CAMPING } state = SEARCHING;
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srslog::basic_logger& logger;
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stack_interface_phy_sa_nr& stack;
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srsran::radio_interface_phy& radio;
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srsran::rf_timestamp_t last_rx_time;
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srsran_ue_sync_nr_t ue_sync_nr = {};
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srsran_timestamp_t stack_tti_ts_new = {};
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srsran_timestamp_t stack_tti_ts = {};
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bool forced_rx_time_init = true; // Rx time sync after first receive from radio
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uint32_t tti = 0;
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};
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} // namespace nr
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} // namespace srsue
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#endif // SRSUE_SLOT_SYNC_H
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