Question: What is the assumption made regarding the detection of ACK and NACK in PHICH demodulation?
Option 1: A bias is applied to prioritize the detection of ACK over NACK.
Option 2: No bias is applied, resulting in zero-threshold detection for both ACK and NACK.
Option 3: The receiver always prioritizes the detection of NACK over ACK.
Option 4: The detection of ACK and NACK is based on a predefined threshold value.
Explanation: In PHICH demodulation, it is assumed that there is no bias applied to the detection of ACK and NACK, resulting in zero-threshold detection for both. This means that the receiver does not prioritize one over the other, ensuring fair detection probabilities for both ACK and NACK.