Question: In a UTRA FDD UE with multiple receiver antenna connectors, what is the characteristic of AWGN signals applied to each connector during testing?
Option 1: Correlated to ensure synchronized signal processing
Option 2: Uncorrelated to simulate real-world interference scenarios
Option 3: Phase-shifted by 90 degrees to enhance diversity gain
Option 4: Identical in power level to maintain uniformity
Explanation: In a multi-antenna receiver setup, applying uncorrelated AWGN signals to each antenna connector accurately mimics the unpredictable nature of real-world radio frequency (RF) interference. This testing methodology ensures the UE's ability to handle diverse signal conditions, enhancing its overall robustness in various deployment scenarios. Correlated or phase-shifted signals would not accurately represent the random interference typically encountered in wireless communications.