Question: For a Base Station (BS) supporting PUCCH format 2 with DTX, what constitutes the CQI block error probability (BLER) as defined in the context of E-UTRA radio transmission and reception?
Option 1: The conditional probability of incorrectly decoding the CQI information when the CQI information is sent.
Option 2: The conditional probability of detecting UE (User Equipment) transmission as DTX, when no CQI information is sent.
Option 3: The sum of the probabilities of correctly decoding the CQI and falsely detecting DTX when CQI is not sent.
Option 4: The sum of the conditional probabilities of incorrectly decoding the CQI information when sent and detecting UE transmission as DTX when the CQI information is indeed sent.
Explanation: This option correctly combines both aspects that define the CQI block error probability (BLER) for a BS supporting PUCCH format 2 with DTX: - The likelihood of misinterpreting the actual CQI data when it is transmitted, and - The chance of mistakenly identifying a transmission as Discontinuous Transmission (DTX) when, in fact, CQI information was sent. This comprehensive definition ensures the BLER accounts for both types of errors that could occur during the reception of CQI information with DTX detection enabled.