Question: In E-UTRA, what is a specific condition for the NACK to ACK detection probability definition for PUCCH format 3, regarding DTX (Discontinuous Transmission) scenarios?
Option 1: NACK bits mapped from DTX are included in the total count of transmitted NACK bits.
Option 2: The receiver's decoding of DTX as NACK is considered a successful NACK transmission.
Option 3: ACK/NACK repetitions must be enabled to account for DTX scenarios.
Option 4: NACK bits received when DTX is sent are excluded from the NACK to ACK detection probability calculation.
Explanation: This is correct because, as specified, instances where DTX was sent and received as NACK are not considered for calculating the NACK to ACK detection probability. This exclusion helps in accurately measuring the detection probability under actual NACK transmission scenarios.