Question: In a UE with multiple receiver antenna connectors, what is the requirement for AWGN (Additive White Gaussian Noise) signals applied during testing, as per 3GPP specifications?
Option 1: The AWGN signals must be correlated across all antenna connectors to simulate real-world interference.
Option 2: The levels of AWGN signals are determined by the UE's transmit power settings.
Option 3: The AWGN signals are only applied to the primary antenna connector, with secondary connectors left untested.
Option 4: The AWGN signals applied to each receiver antenna connector must be uncorrelated.
Explanation: To accurately test the performance of a User Equipment (UE) with multiple receiver antenna connectors, the Additive White Gaussian Noise (AWGN) signals used in testing should mimic real-world conditions as closely as possible. Applying uncorrelated AWGN signals to each connector ensures that the UE's ability to handle independent noise sources on each antenna is thoroughly evaluated, reflecting the diverse signal conditions encountered in practical scenarios. This approach helps in assessing the UE's receiver sensitivity and robustness under various interference conditions.