PRB refer to block assigned to user by scheduler . In 5G we have VRB to PRB mapping which depends on Downlink resource allocation type, it can be interleaved or non inter leaved.
Read moreWhat is 5G resource grid?
It is the smallest unit of the resource grid made up of one subcarrier in frequency domain and one OFDM symbol in time domain. … There is one resource grid for a given antenna port p , subcarrier spacing configuration u, and transmission direction (downlink or uplink).
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