Question: What is the purpose of transmitting Phase Tracking Reference Signals (PT-RS) in addition to Demodulation Reference Signals (DMRS) on the Physical Downlink Shared Channel (PDSCH)?
Option 1: To improve channel estimation for Multiple Input Multiple Output (MIMO) operations.
Option 2: To aid receiver phase tracking and improve demodulation performance.
Option 3: To provide additional information for hybrid-ARQ processing.
Option 4: To support beamforming and enhance signal strength.
Explanation: Phase Tracking Reference Signals (PT-RS) are transmitted in addition to Demodulation Reference Signals (DMRS) on the Physical Downlink Shared Channel (PDSCH) to aid receiver phase tracking. This is essential for maintaining accurate demodulation and decoding of the received signal, especially in scenarios where the channel conditions are dynamic or the UE is moving at high speeds.