Question: In 3GPP-compliant HSDPA testing with UE receiver diversity, what is the requirement for the fading profiles used in the two faders for enhanced performance requirements type 3?
Option 1: The fading profiles must be identical to simulate real-world correlated shadowing.
Option 2: The fading profiles should have a predefined correlation coefficient to mimic urban environments.
Option 3: The choice of fading profiles is left to the manufacturer's discretion for flexibility.
Option 4: The fading profiles used in the two faders must be uncorrelated to each other.
Explanation: To accurately test the enhanced performance of HSDPA with UE receiver diversity, ensuring that the fading profiles are uncorrelated simulates a more realistic and varied radio environment. This setup helps in assessing the device's ability to handle diverse signal conditions effectively, which is crucial for reliable wireless communications in heterogeneous environments.