Question: In Radio Link Monitoring for 5G NR, how is the presence of an uplink signal from a UE with multiple transmit antennas determined in terms of measured power?
Option 1: By comparing the total output power across all antennas to a fixed threshold of -50 dBm
Option 2: By measuring the peak power at any single transmit antenna connector
Option 3: By verifying if the mean power at each transmit connector exceeds Transmit OFF power -50 dBm
Option 4: By calculating the aggregate power of all component carriers for a single antenna scenario
Explanation: For UEs equipped with multiple transmit antennas, the standard requires measuring the mean power at each individual transmit connector to determine if an uplink signal is present. Specifically, if this measured power exceeds the Transmit OFF power threshold by more than -50 dBm, it indicates the presence of an uplink signal. This approach ensures accurate detection across all transmission paths.