Question: In E-UTRA, when calculating the averaged Error Vector Magnitude (EVM) for TDD mode, which statement about time domain averaging is correct?
Option 1: The averaging in the time domain always spans exactly one frame duration.
Option 2: The averaging in the time domain must only include subframes from consecutive frames.
Option 3: Special fields like DwPTS and GP are mandatory for inclusion in EVM averaging.
Option 4: The averaging in the time domain can be calculated from subframes of different frames with a minimum averaging length of 10 subframes, excluding special fields.
Explanation: In TDD mode, unlike FDD, the time domain averaging can span across different frames to accommodate its dynamic nature. Special fields like DwPTS and GP are excluded from this averaging for consistency, focusing on standard downlink subframes for EVM assessment.