Question: In E-UTRA uplink physical layer processing for transport channels, what modulation schemes are mandatory for full-PRB (Physical Resource Block) transmission of PUSCH (Physical Uplink Shared Channel) in a User Equipment (UE)?
Option 1: Only QPSK
Option 2: QPSK and 16QAM
Option 3: QPSK, 16QAM, and 64QAM
Option 4: All of the above including 256QAM
Explanation: For full-PRB transmission of PUSCH, QPSK and 16QAM are mandatory in a UE. While 64QAM and 256QAM are also listed for this purpose, they are specified as optional in the UE, highlighting flexibility based on UE capabilities which impacts uplink communication throughput and efficiency.