[Dive into 5G] Downlink Physical Channels - Introduction to Data Channels and Signals

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[Dive into 5G] Downlink Physical Channels - Introduction to Data Channels and Signals:

1 Purpose
This document answers the following questions:


What are the principles for mapping the PDSCH to time-frequency resources?
Why are front-loaded DMRS for PDSCH and additional DMRS for PDSCH required?
How is the time-frequency structure of the DMRS for PDSCH designed and defined?
Why was PT-RS for PDSCH introduced in comparison with LTE?
How is the time-frequency structure of the PT-RS for PDSCH designed and defined?