Question: In a Base Station (BS) conformance test for FDD, what is the maximum allowable probability for an ACK false alarm (P(DTX->ACK)) in static propagation conditions at a specified Ec/N0 limit?
Option 1: 10^(-1)
Option 2: 5 × 10^(-2)
Option 3: 5 × 10^(-3)
Option 4: 10^(-2)
Explanation: The correct answer is based on the performance requirement for ACK false alarm in static propagation conditions, which stipulates that the probability of erroneous detection of ACK (when input is only DPCCH and DPDCH + interference) should not exceed a certain threshold. Specifically, for BS conformance testing under these conditions, the maximum error ratio allowed for ACK false alarm (P(DTX->ACK)) is defined as 10^(-2) or less, ensuring reliable communication by minimizing incorrect acknowledgments.