All these signals PSS/SSS and Pilot tones are generated at function [common_signal_procedures()](https://github.com/joary/openairinterface5g/tree/study/openair1/SCHED/phy_procedures_lte_eNb.c#L513)
- common_signal_procedures()
- generate_pilots_slot()
- lte_dl_cell_spec() - Insert the pilot tones into the LTE slot
- generate_pss() - Generate the Primary Synchronization Signal
- generate_sss() - Generate the Secondary Synchronization Signal
- generate_pbch()
- generate_pilots_slot()