Question: For a UE (User Equipment) undergoing the SDU (Service Data Unit) error rate test in a 3.84 Mcps TDD (Time Division Duplex) setup, what is a prerequisite for the receiver antenna connectors if there are at least two?
Option 1: The fading of the signals and AWGN (Additive White Gaussian Noise) signals must be correlated across all connectors.
Option 2: Each connector must support a different frequency band.
Option 3: The connectors must be physically identical in design.
Option 4: The fading of the signals and AWGN signals applied to each receiver antenna connector shall be uncorrelated.
Explanation: In wireless communication systems, especially in tests involving multiple antennas like MIMO configurations, ensuring that the fading and noise patterns are uncorrelated between different antenna connectors is crucial. This setup more accurately reflects real-world conditions where signals received by different antennas undergo independent fading and noise effects, thus providing a more comprehensive test of the UE's performance capabilities in handling diverse signal conditions.