Question: In a TDD (Time Division Duplexing) system, what determines the reporting accuracy of the Channel Quality Indicator (CQI) in environments with AWGN (Additive White Gaussian Noise) and static orthogonality?
Option 1: Only the reporting variance of the CQI.
Option 2: Solely the BLER (Block Error Rate) performance of the indicated transport format.
Option 3: A combination of the UE's (User Equipment) category and the TDD mode used.
Option 4: Both the reporting variance of the CQI and the BLER performance using the transport format indicated by the reported CQI median.
Explanation: The reporting accuracy of the Channel Quality Indicator (CQI) relies on two key factors: the Reporting Variance of the CQI, which affects the precision of channel condition reports, and the BLER Performance Using the Transport Format Indicated by the Reported CQI Median, where lower BLER indicates better performance and higher reporting accuracy. Considering both provides a comprehensive understanding of the CQI's reporting accuracy in such environments.