Question: In NR (New Radio) as per 3GPP specifications, when mapping to physical resources for a monitored PDCCH (Physical Downlink Control Channel), how does the UE (User Equipment) handle the block of complex-valued symbols in relation to DMRS (Demodulation Reference Signals)?
Option 1: The UE maps the symbols to resource elements used for both the monitored PDCCH and its associated DMRS, in decreasing order of frequency, then time.
Option 2: The UE assumes the symbols are scaled by a fixed factor and mapped to all resource elements regardless of their use for PDCCH or DMRS, in random order.
Option 3: The UE shall assume the block of complex-valued symbols is scaled by a factor and mapped to resource elements used for the monitored PDCCH but not used for the associated PDCCH DMRS, in increasing order of time, then frequency.
Option 4: The UE maps the symbols only to resource elements not used for either the monitored PDCCH or its associated DMRS, in increasing order of frequency, then time.
Explanation: This is correct because, when dealing with the mapping to physical resources for a monitored PDCCH, the UE scales the block of complex-valued symbols by a factor and maps them to resource elements used for the monitored PDCCH but not used for the associated PDCCH DMRS. This process is done in increasing order of time, then frequency, ensuring efficient use of resources while maintaining signal integrity for demodulation purposes.