Question: What is the primary purpose of passing both the reference waveform and the measured waveform through a matched Root Raised Cosine filter in EVM measurement for UTRA FDD UE?
Option 1: To amplify the waveforms for increased sensitivity
Option 2: To filter out noise above the specified bandwidth (3.84 MHz) and shape the signal with a roll-off factor (α = 0.22)
Option 3: To synchronize the chip clock timing between the two waveforms
Option 4: To directly calculate the mean error vector power without further processing
Explanation: The correct answer is Option 2 because passing both waveforms through a matched Root Raised Cosine filter with specified bandwidth and roll-off factor ensures that both signals are processed identically in terms of frequency response, allowing for a fair comparison. This step is crucial for accurately measuring the difference (error vector) between the ideal reference waveform and the actual measured waveform, which is fundamental to calculating the Error Vector Magnitude (EVM).