A proposal to use cloud transmission technique into the ISDB-T system

Silva, Luiz Fernando da; Akamine, Cristiano; Maciel, Yuri Pontes; Bedicks, Gunnar; Horta, Edson Lemos

doi:10.1109/bmsb.2015.7177246

Cited by 5 publications

(1 citation statement)

References 7 publications

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“…Still on the perspective of the Cloud Txn concept, a first proposal was presented by [20] which used ISDB-T B in the UL. Later studies were published using LDM nomination and some new characteristics such as the introduction of LDPC codes in the LL [21], an implementation using diversity at reception in order to improve robustness [22], [23], an ISDB-T B LDM system with the BICM stage of ATSC 3.0 in the LL and diversity at reception [24] and a real-time ISDB-T B LDM receiver using SDR [16].…”

Section: Related Workmentioning

confidence: 99%

Implementation of a 3-layer LDM Broadcast System Backward-compatible with ISDB-TB

Rabaca¹,

Jerji²,

Akamine³

2021

RADIOENGINEERING

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This paper presents an implementation of a 3layer transmitter and receiver using Layer Division Multiplexing (LDM), in Software Defined Radio (SDR). The main idea of this work is to show another point of view of the traditional LDM technique that uses two layers. This proposal uses an attenuated intermediate layer, called Middle Layer (ML), between the highest power layer, called Upper Layer (UL), and the most attenuated layer, called Lower Layer (LL). The UL is fully compatible with the Integrated Services Digital Broadcasting Terrestrial -Version B (ISDB-T B ). The ML, with greater robustness, and LL, with higher capacity, use powerful channel coders, a custom frame size and an adapted bit interleaver. With the use of this modified LDM, it is possible to develop a system with different robustness levels between layers and with lower layers that complement each other, to achieve bit rates that allow for the deployment of High Definition Television (HDTV), in the UL, and Ultra High Definition Television (UHDTV), in the ML and LL. In addition, a system was also implemented with three layers, but with the ML with higher capacity and the LL with greater robustness. The performance of the 3-layer system was compared with the 2-layer LDM technique and there was an improvement in the system modularity, without a decrease in the bit rate.

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