Question: Which of the following downlink physical signals in a 5G New Radio (NR) network is primarily used for location-based services, enabling precise positioning of User Equipment (UE)?
Option 1: Demodulation Reference Signals (DM-RS) - Used for demodulating data channels.
Option 2: Phase-Tracking Reference Signals (PT-RS) - Utilized to track and compensate for phase variations.
Option 3: Channel-State Information Reference Signal (CSI-RS) - Aids in measuring channel state information for beam management.
Option 4: Positioning Reference Signal (PRS) - Dedicated for positioning and location services.
Explanation: The Positioning Reference Signal (PRS) is specifically designed for enabling precise positioning of User Equipment (UE) in a 5G New Radio network, catering to location-based services, which is crucial for various use cases like emergency services, navigation, and more.