ATSC 3.0 and LTE Cooperation for LDM and SHVC Based Mobile Broadcasting This paper presents Advanced Television Systems Committee (ATSC) 3.0 and 4th Generation (4G) LongTerm Evolution (LTE) cooperation trials for highquality and reliable mobile broadcasting services. Given the ATSC 3.0 based Layered Division Multiplexing (LDM) and Scalable High Efficiency Video Codec (SHVC) configuration, which is the most spectralefficient broadcast mode when mobile and fixed services are intended in a single radio frequency (RF) channel, the convergence of broadcast and broadband in the Internet protocol (IP) level is developed and field experimented. Service scenarios in a real field environment includes Base Layer (BL) and Enhancement Layer (EL) switching in a broadcast coverage, switching between broadcast and broadband networks, and hybrid services using both broadcast and broadband networks.

On the Efficiency of Layered Division Multiplexing for DVBS2X Satellite Communications Layered Division Multiplexing (LDM) is an effective approach for increase of data rates available for different services in wireless channels. LDM is included in ATSC 3.0 digital terrestrial TV system based on orthogonal frequency division multiplexing (OFDM) modulation. At the same time, satellite DVBS2 and DVBS2X systems that are currently used for DirectToHome (DTH) broadcasting include Variable Coding and Modulation (VCM) mode, which actually provides the opportunity to deliver different services to the consumers with Time Division Multiplexing (TDM). From this point of view, the investigation of LDM for satellite broadcast and communication systems and its comparison with VCM (TDM) approach becomes relevant. In this paper, several use cases were considered providing the delivery of High Definition (HD) and Ultra High Definition (UHD) TV services to customers as well as additional communication services. Analysis shows that LDM provides considerable gain in comparison with VCM for each use case.