Question: For a UL CLTD (Closed-Loop Transmit Diversity) UE, how is the occupied bandwidth determined when there are multiple active antenna ports?
Option 1: The occupied bandwidth is the average of the measured occupied bandwidths across all active antenna ports.
Option 2: The occupied bandwidth is determined by the highest measured occupied bandwidth among all active antenna ports.
Option 3: The occupied bandwidth range is defined by the lowest and highest boundaries of the measured occupied bandwidths across all active antenna ports.
Option 4: The occupied bandwidth is always set to the maximum allowed for the UE's chip rate, regardless of measurement.
Explanation: In a UL CLTD scenario with multiple active antenna ports, accurately defining the occupied bandwidth requires considering the spread of measurements. This is correctly reflected by defining the occupied bandwidth range using both the lowest and highest boundaries of measured occupied bandwidths across all active antenna ports, ensuring compliance with transmission requirements without unnecessarily limiting or overestimating bandwidth usage.