5g-team
/
srsRAN_4G
mirror of https://github.com/pvnis/srsRAN_4G.git
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Add helper functions for abs freq point a.

Browse Source
master
Fabian Eckermann 3 years ago committed by Andre Puschmann
parent c45c3ec95c
commit 2d0be77660
2 changed files with 75 additions and 51 deletions
Show Stats Download Patch File Download Diff File

90
lib/include/srsran/common/band_helper.h
Unescape Escape View File

@ -105,6 +105,15 @@ public:
*/
double get_ul_center_freq(const srsran_carrier_nr_t& carrier);
/**
* @brief Compute the absolute frequency point A for a arfcn
*
* @param nof_prb Number of PRBs.
* @param arfcn Given ARFCN.
* @return frequency point A in arfcn notation.
*/
uint32_t get_abs_freq_point_a_arfcn(uint32_t nof_prb, uint32_t arfcn);
class sync_raster_t
{
protected:
@ -139,6 +148,8 @@ private:
// internal helper
double get_center_freq_from_abs_freq_point_a(uint32_t nof_prb, uint32_t freq_point_a_arfcn);
double get_abs_freq_point_a_from_center_freq(uint32_t nof_prb, double center_freq);
// Elements of TS 38.101-1 Table 5.2-1: NR operating bands in FR1
struct nr_operating_band {
uint16_t band;
@ -288,23 +299,22 @@ private:
{83, KHZ_100, 140600, 20, 149600, 0, 0, 0},
{84, KHZ_100, 384000, 20, 396000, 0, 0, 0},
{86, KHZ_100, 342000, 20, 356000, 0, 0, 0}
// clang-format on
// clang-format on
}};
static const uint32_t nof_nr_bands_fr2 = 8;
static constexpr std::array<nr_band, nof_nr_bands_fr2> nr_band_table_fr2 = {{
{257, KHZ_60, 2054166, 1, 2104165, 2054166, 1, 2104165},
{257, KHZ_120, 2054167, 2, 2104165, 2054167, 20, 2104165},
static constexpr std::array<nr_band, nof_nr_bands_fr2> nr_band_table_fr2 = {
{{257, KHZ_60, 2054166, 1, 2104165, 2054166, 1, 2104165},
{257, KHZ_120, 2054167, 2, 2104165, 2054167, 20, 2104165},
{258, KHZ_60, 2016667, 1, 2070832, 2016667, 1, 2070832},
{258, KHZ_120, 2016667, 2, 2070831, 2016667, 2, 2070832},
{258, KHZ_60, 2016667, 1, 2070832, 2016667, 1, 2070832},
{258, KHZ_120, 2016667, 2, 2070831, 2016667, 2, 2070832},
{260, KHZ_60, 2229166, 1, 2279165, 2229166, 1, 2279165},
{260, KHZ_120, 2229167, 2, 2279165, 2229167, 2, 2279165},
{260, KHZ_60, 2229166, 1, 2279165, 2229166, 1, 2279165},
{260, KHZ_120, 2229167, 2, 2279165, 2229167, 2, 2279165},
{261, KHZ_60, 2070833, 1, 2084999, 2070833, 1, 2084999},
{261, KHZ_120, 2070833, 2, 2084999, 2070833, 2, 2084999}
}};
{261, KHZ_60, 2070833, 1, 2084999, 2070833, 1, 2084999},
{261, KHZ_120, 2070833, 2, 2084999, 2070833, 2, 2084999}}};
// Elements of TS 38.101-1 Table 5.4.3.3-1 : Applicable SS raster entries per operating band
struct nr_band_ss_raster {
@ -317,35 +327,35 @@ private:
};
static const uint32_t nof_nr_band_ss_raster = 29;
static constexpr std::array<nr_band_ss_raster, nof_nr_band_ss_raster> nr_band_ss_raster_table = {{
{1, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5279, 1, 5419},
{2, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4829, 1, 4969},
{3, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4517, 1, 4693},
{5, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 2177, 1, 2230},
{5, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_B, 2183, 1, 2224},
{7, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6554, 1, 6718},
{8, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 2318, 1, 2395},
{12, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1828, 1, 1858},
{20, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1982, 1, 2047},
{25, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4829, 1, 4981},
{28, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1901, 1, 2002},
{34, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5030, 1, 5056},
{38, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6431, 1, 6544},
{39, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4706, 1, 4795},
{40, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5756, 1, 5995},
{41, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6246, 3, 6717},
{41, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 6252, 3, 6714},
{50, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3584, 1, 3787},
{51, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3572, 1, 3574},
{66, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5279, 1, 5494},
{66, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_B, 5285, 1, 5488},
{70, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4993, 1, 5044},
{71, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1547, 1, 1624},
{74, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3692, 1, 3790},
{75, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3584, 1, 3787},
{76, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3572, 1, 3574},
{77, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 7711, 1, 8329},
{78, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 7711, 1, 8051},
{79, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 8480, 16, 8880},
{1, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5279, 1, 5419},
{2, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4829, 1, 4969},
{3, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4517, 1, 4693},
{5, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 2177, 1, 2230},
{5, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_B, 2183, 1, 2224},
{7, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6554, 1, 6718},
{8, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 2318, 1, 2395},
{12, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1828, 1, 1858},
{20, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1982, 1, 2047},
{25, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4829, 1, 4981},
{28, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1901, 1, 2002},
{34, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5030, 1, 5056},
{38, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6431, 1, 6544},
{39, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4706, 1, 4795},
{40, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5756, 1, 5995},
{41, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6246, 3, 6717},
{41, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 6252, 3, 6714},
{50, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3584, 1, 3787},
{51, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3572, 1, 3574},
{66, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5279, 1, 5494},
{66, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_B, 5285, 1, 5488},
{70, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4993, 1, 5044},
{71, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1547, 1, 1624},
{74, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3692, 1, 3790},
{75, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3584, 1, 3787},
{76, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3572, 1, 3574},
{77, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 7711, 1, 8329},
{78, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 7711, 1, 8051},
{79, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 8480, 16, 8880},
}};
};

14
lib/src/common/band_helper.cc
Unescape Escape View File

@ -129,6 +129,20 @@ double srsran_band_helper::get_center_freq_from_abs_freq_point_a(uint32_t nof_pr
SRSRAN_NRE);
}
uint32_t srsran_band_helper::get_abs_freq_point_a_arfcn(uint32_t nof_prb, uint32_t arfcn)
{
return freq_to_nr_arfcn(get_abs_freq_point_a_from_center_freq(nof_prb, nr_arfcn_to_freq(arfcn)));
}
double srsran_band_helper::get_abs_freq_point_a_from_center_freq(uint32_t nof_prb, double center_freq)
{
// for FR1 unit of resources blocks for freq calc is always 180kHz regardless for actual SCS of carrier
// TODO: add offset_to_carrier
return center_freq -
(nof_prb / 2 * SRSRAN_SUBC_SPACING_NR(srsran_subcarrier_spacing_t::srsran_subcarrier_spacing_15kHz) *
SRSRAN_NRE);
}
srsran_ssb_patern_t srsran_band_helper::get_ssb_pattern(uint16_t band, srsran_subcarrier_spacing_t scs) const
{
// Look for the given band and SCS

Write Preview
Loading…
Cancel
Save