Question: For a UTRA FDD UE supporting 4C-HSDPA with capability categories 29 and 30, what determines the reporting accuracy of the Channel Quality Indicator (CQI) in fading environments?
Option 1: The modulation scheme used for data transmission
Option 2: The average received signal power at the UE antenna
Option 3: The Block Error Rate (BLER) performance of the uplink control channel
Option 4: The BLER performance using the transport format indicated by the reported CQI median
Explanation: In fading environments, the accuracy of Channel Quality Indicator (CQI) reports is crucial for effective link adaptation. The correct answer highlights that this accuracy is determined by the Block Error Rate (BLER) performance in relation to the transport format selected based on the median CQI reported by the User Equipment (UE), ensuring the network can trust the CQI reports to adjust transmission parameters for optimal data transfer.