- SSB is a synchronization signal block used during Cell Search and Mobility.
- It consists of PSS, SSS, and PBCH.
- It Occupies 20RBs and 4Symbols.
Below are the main steps followed by the UE to detect SSB and to complete DL & UL Synchronization during cell search.
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UE will scan the band to find the SSB frequency location once the UE Power is turned on.
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UE blindly scans the band until detecting SSB Frequency location; UE starts frequency scanning from the bottom of the band.
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After the UE Detected SSB Location, it will start decoding PSS “Primary synchronization signal, then SSS"Secondary synchronization signals in sequence to acquire and obtain the PCI “Primary Cell ID.”
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Then the UE will decode PBCH “Physical broadcast channel “ to obtain and retrieve MIB “Master information block “ and SIB1 “ System information block type 1” information which is needed to complete the initial access
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Lastly, after the Downlink Synchronization has been completed, the UE will start PRACH “Physical random access channel procedure” to complete the uplink Synchronization.
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