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srsLTE
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nr,gnb: fix abs freq ssb arfcn derivation

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Francisco 2021-11-15 09:40:54 +00:00 committed by Andre Puschmann
parent 0b8a6970f0
commit f2a5f00bb3
1 changed files with 3 additions and 3 deletions
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6
lib/src/common/band_helper.cc
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@ -142,10 +142,11 @@ uint32_t srsran_band_helper::find_lower_bound_abs_freq_ssb(uint16_t
return 0;
}
double ssb_bw_hz = SRSRAN_SSB_BW_SUBC * SRSRAN_SUBC_SPACING_NR(scs);
while (!sync_raster.end()) {
double abs_freq_ssb_hz = sync_raster.get_frequency();
if ((abs_freq_ssb_hz > min_center_freq_hz) and
if ((abs_freq_ssb_hz > min_center_freq_hz + ssb_bw_hz / 2) and
((uint32_t)std::round(abs_freq_ssb_hz - min_center_freq_hz) % SRSRAN_SUBC_SPACING_NR(scs) == 0)) {
return freq_to_nr_arfcn(abs_freq_ssb_hz);
}
@ -161,9 +162,8 @@ uint32_t srsran_band_helper::get_abs_freq_ssb_arfcn(uint16_t
uint32_t coreset0_offset_rb)
{
double freq_point_a_hz = nr_arfcn_to_freq(freq_point_a_arfcn);
double ssb_bw_hz = SRSRAN_SSB_BW_SUBC * SRSRAN_SUBC_SPACING_NR(scs);
double coreset0_offset_hz = coreset0_offset_rb * SRSRAN_NRE * SRSRAN_SUBC_SPACING_NR(scs);
return find_lower_bound_abs_freq_ssb(band, scs, freq_point_a_hz + coreset0_offset_hz + ssb_bw_hz / 2);
return find_lower_bound_abs_freq_ssb(band, scs, freq_point_a_hz + coreset0_offset_hz);
}
srsran_ssb_patern_t srsran_band_helper::get_ssb_pattern(uint16_t band, srsran_subcarrier_spacing_t scs) const