Question: In 3GPP Base Station conformance testing for FDD, what is the primary purpose of applying a matched filter (RRC 0.22) to the output signal of the TX under test during measurement?
Option 1: To amplify the signal for better transmission over long distances.
Option 2: To optimize the signal shape and timing on the frequency axis for accurate analysis.
Option 3: To modify the spreading factor (sf) for adapting to different symbol lengths.
Option 4: To convert complex samples into a simpler, scalar format.
Explanation: The matched filter (RRC 0.22) is applied to ensure the signal's shape and position on the frequency axis are correct, which is crucial for accurate analysis of the base station's transmission characteristics during conformance testing. This process helps in maintaining the integrity of the signal's original properties, essential for further processing and evaluation against 3GPP standards.