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ssb offset to point A bugfix

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This commit is contained in:
rakesh mundlamuri
2023-04-24 10:47:41 +02:00
parent 6022fe5acd
commit 5143133d33
4 changed files with 24 additions and 42 deletions
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openair2/LAYER2/NR_MAC_gNB/config.c
+11 -8
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@@ -351,24 +351,27 @@ void config_common(gNB_MAC_INST *nrmac, int pdsch_AntennaPorts, int pusch_Antenn
cfg->num_tlv++;
// SSB Table Configuration
uint32_t absolute_diff = (*frequencyInfoDL->absoluteFrequencySSB - frequencyInfoDL->absoluteFrequencyPointA);
const int scaling_5khz = frequencyInfoDL->absoluteFrequencyPointA < 600000 ? 3 : 1;
int sco = (absolute_diff/scaling_5khz) % 24;
if(frequency_range == FR2)
sco >>= 1; // this assumes 120kHz SCS for SSB and subCarrierSpacingCommon (only option supported by OAI for
const int scs_scaling = frequency_range == FR2 ? 1 << (*scc->ssbSubcarrierSpacing - 2) : 1 << *scc->ssbSubcarrierSpacing;
cfg->ssb_table.ssb_offset_point_a.value = absolute_diff/(12*scaling_5khz) - 10*scs_scaling; //absoluteFrequencySSB is the central frequency of SSB which is made by 20RBs in total
cfg->ssb_table.ssb_offset_point_a.value = get_ssb_offset_to_pointA(*scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencySSB,
scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA,
*scc->ssbSubcarrierSpacing,
frequency_range);
cfg->ssb_table.ssb_offset_point_a.tl.tag = NFAPI_NR_CONFIG_SSB_OFFSET_POINT_A_TAG;
cfg->num_tlv++;
cfg->ssb_table.ssb_period.value = *scc->ssb_periodicityServingCell;
cfg->ssb_table.ssb_period.tl.tag = NFAPI_NR_CONFIG_SSB_PERIOD_TAG;
cfg->num_tlv++;
cfg->ssb_table.ssb_subcarrier_offset.value = sco;
cfg->ssb_table.ssb_subcarrier_offset.value = get_ssb_subcarrier_offset(*scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencySSB,
scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA);
cfg->ssb_table.ssb_subcarrier_offset.tl.tag = NFAPI_NR_CONFIG_SSB_SUBCARRIER_OFFSET_TAG;
cfg->num_tlv++;
nrmac->ssb_SubcarrierOffset = cfg->ssb_table.ssb_subcarrier_offset.value;
nrmac->ssb_OffsetPointA = cfg->ssb_table.ssb_offset_point_a.value;
LOG_I(NR_MAC,
"ssb_OffsetPointA %d, ssb_SubcarrierOffset %d\n",
cfg->ssb_table.ssb_offset_point_a.value,
cfg->ssb_table.ssb_subcarrier_offset.value);
switch (scc->ssb_PositionsInBurst->present) {
case 1 :