Question: What is the primary reason for introducing a minimum test time in BLER (Block Error Rate) tests with fading channels, according to 3GPP specifications for Terminal conformance?
Option 1: To average fluctuations of the multipath fading channel, ensuring approximate statistical independence of error events.
Option 2: To accommodate the memory effect of convolutional/turbo coders in TDD (Time Division Duplex) systems.
Option 3: To align with the assumption of rare error events (lim BER → 0) for all transmission scenarios.
Option 4: To compensate for the lack of samples and errors summation over multiple TTIs (Transmission Time Intervals).
Explanation: In the context of BLER tests with fading channels, statistical independence of error events is crucial. However, multipath fading channels introduce memory effects that interfere with this assumption. The primary purpose of introducing a minimum test time is to average out these fluctuations, thereby justifying the assumption of independent error events approximately. This ensures more reliable and consistent test results under fading conditions.