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161 lines
5.3 KiB
C++
161 lines
5.3 KiB
C++
/**
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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 SRSRAN_BAND_HELPER_H
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#define SRSRAN_BAND_HELPER_H
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#include <array>
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#include <stdint.h>
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#include <vector>
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namespace srsran {
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// Helper class to handle frequency bands and ARFCNs
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// For NR: NR-ARFCN and channel raster as per TS 38.104
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class srsran_band_helper
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{
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public:
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srsran_band_helper() = default;
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~srsran_band_helper() = default;
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// Return frequency of given NR-ARFCN in Hz
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double nr_arfcn_to_freq(uint32_t nr_arfcn);
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// Possible values of delta f_raster in Table 5.4.2.3-1 and Table 5.4.2.3-2
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enum delta_f_raster_t {
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DEFAULT = 0, // for bands with 2 possible values for delta_f_raster (e.g. 15 and 30 kHz), the lower is chosen
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KHZ_15,
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KHZ_30,
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KHZ_60,
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KHZ_100,
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KHZ_120
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};
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// Return vector of bands that ARFCN is valid for
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// For bands with 2 possible raster offsets, delta_f_raster needs to be specified
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std::vector<uint32_t> get_bands_nr(uint32_t nr_arfcn, delta_f_raster_t delta_f_raster = DEFAULT);
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private:
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// Table 5.4.2.1-1
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struct nr_raster_params {
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double delta_F_global_kHz;
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double F_REF_Offs_MHz;
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uint32_t N_REF_Offs;
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uint32_t N_REF_min;
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uint32_t N_REF_max;
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};
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// Helper to calculate F_REF according to Table 5.4.2.1-1
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nr_raster_params get_raster_params(uint32_t nr_arfcn);
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static const uint32_t max_nr_arfcn = 3279165;
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static constexpr std::array<nr_raster_params, 3> nr_fr_params = {{
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// clang-format off
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// Frequency range 0 - 3000 MHz
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{5, 0.0, 0, 0, 599999},
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// Frequency range 3000 - 24250 MHz
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{15, 3000.0, 600000, 600000, 2016666},
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// Frequency range 24250 - 100000 MHz
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{60, 24250.08, 2016667, 2016667, max_nr_arfcn}
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// clang-format on
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}};
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// Elements of Table 5.4.2.3-1 in TS 38.104
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struct nr_band {
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uint16_t band;
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delta_f_raster_t delta_f_raster;
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uint32_t ul_nref_first;
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uint32_t ul_nref_step;
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uint32_t ul_nref_last;
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uint32_t dl_nref_first;
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uint32_t dl_nref_step;
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uint32_t dl_nref_last;
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};
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// List of NR bands for FR1 (Table 5.4.2.3-1)
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// bands with more than one raster offset have multiple entries
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static const uint32_t nof_nr_bands_fr1 = 36;
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static constexpr std::array<nr_band, nof_nr_bands_fr1> nr_band_table_fr1 = {{
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// clang-format off
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{1, KHZ_100, 384000, 20, 396000, 422000, 20, 434000},
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{2, KHZ_100, 370000, 20, 382000, 386000, 20, 398000},
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{3, KHZ_100, 342000, 20, 357000, 361000, 20, 376000},
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{5, KHZ_100, 164800, 20, 169800, 173800, 20, 178800},
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{7, KHZ_100, 500000, 20, 514000, 524000, 20, 538000},
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{8, KHZ_100, 176000, 20, 183000, 185000, 20, 192000},
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{12, KHZ_100, 139800, 20, 143200, 145800, 20, 149200},
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{20, KHZ_100, 166400, 20, 172400, 158200, 20, 164200},
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{25, KHZ_100, 370000, 20, 383000, 386000, 20, 399000},
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{28, KHZ_100, 140600, 20, 149600, 151600, 20, 160600},
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{34, KHZ_100, 402000, 20, 405000, 402000, 20, 405000},
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{38, KHZ_100, 514000, 20, 524000, 514000, 20, 524000},
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{39, KHZ_100, 376000, 20, 384000, 376000, 20, 384000},
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{40, KHZ_100, 460000, 20, 480000, 460000, 20, 480000},
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{41, KHZ_15, 499200, 3, 537999, 499200, 3, 537999},
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{41, KHZ_30, 499200, 6, 537996, 499200, 6, 537996},
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{50, KHZ_100, 286400, 20, 303400, 286400, 20, 303400},
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{51, KHZ_100, 285400, 20, 286400, 285400, 20, 286400},
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{66, KHZ_100, 342000, 20, 356000, 422000, 20, 440000},
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{70, KHZ_100, 339000, 20, 342000, 399000, 20, 404000},
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{71, KHZ_100, 132600, 20, 139600, 123400, 20, 130400},
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{74, KHZ_100, 285400, 20, 294000, 295000, 20, 303600},
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{75, KHZ_100, 0, 0, 0, 286400, 20, 303400},
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{76, KHZ_100, 0, 0, 0, 285400, 20, 286400},
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{77, KHZ_15, 620000, 1, 680000, 620000, 1, 680000},
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{77, KHZ_30, 620000, 2, 680000, 620000, 2, 680000},
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{78, KHZ_15, 620000, 1, 653333, 620000, 1, 653333},
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{78, KHZ_30, 620000, 2, 653332, 620000, 2, 653332},
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{79, KHZ_15, 693334, 2, 733333, 693334, 2, 733333},
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{79, KHZ_30, 693334, 2, 733332, 693334, 2, 733332},
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{80, KHZ_100, 342000, 20, 357000, 0, 0, 0},
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{81, KHZ_100, 176000, 20, 183000, 0, 0, 0},
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{82, KHZ_100, 166400, 20, 172400, 0, 0, 0},
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{83, KHZ_100, 140600, 20, 149600, 0, 0, 0},
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{84, KHZ_100, 384000, 20, 396000, 0, 0, 0},
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{86, KHZ_100, 342000, 20, 356000, 0, 0, 0}
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// clang-format on
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}};
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static const uint32_t nof_nr_bands_fr2 = 36;
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static constexpr std::array<nr_band, nof_nr_bands_fr2> nr_band_table_fr2 = {{
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{257, KHZ_60, 2054166, 1, 2104165, 2054166, 1, 2104165},
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{257, KHZ_120, 2054167, 2, 2104165, 2054167, 20, 2104165},
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{258, KHZ_60, 2016667, 1, 2070832, 2016667, 1, 2070832},
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{258, KHZ_120, 2016667, 2, 2070831, 2016667, 2, 2070832},
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{260, KHZ_60, 2229166, 1, 2279165, 2229166, 1, 2279165},
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{260, KHZ_120, 2229167, 2, 2279165, 2229167, 2, 2279165},
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{261, KHZ_60, 2070833, 1, 2084999, 2070833, 1, 2084999},
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{261, KHZ_120, 2070833, 2, 2084999, 2070833, 2, 2084999}
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}};
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};
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} // namespace srsran
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#endif // SRSRAN_BAND_HELPER_H
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