Esquemas de multiservicios en DTMB, basados en técnicas de multiplexación LDM y TDM.

This paper intends to formalize a proposal of multiservice schemes based on the Digital Terrestrial Multimedia Broadcast (DTMB) standard, using the TDM (Time Division Multiplexing) and LDM (Layered Division Multiplexing) techniques. It is a well-known fact, that TDM is a widely used technique, which has been implemented in multiple applications; on the other hand, LDM which grew out from the Cloud Transmission concept, is a new promising multiplexing technique for offering simultaneously stationary and mobile/indoor services with different robustness and bitrates using the same radiofrequency channel. Recently, LDM has been accepted as a baseline technology for the new generation digital terrestrial television standards (ATSC 3.0). The proposed LDM implementation that is addressed in this paper is based on a structure of two layers for the services: mobile and fixed. In the same way, three different scenarios of TDM schemes have been defined, with the aim of performing a comparative analysis of the performance of both schemes. Finally, based on the obtained results of the simulations carried out, for each of the multiplexing techniques were identified the optimal operating points. [ABSTRACT FROM AUTHOR]