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Implementation of an ISDB-TBLDM Broadcast System Using the BICM Stage of ATSC 3.0 on Enhanced Layer and Diversity at Reception

This paper presents performance results of commercial ISDB-TB receivers with the ISDB-TB LDM in Core Layer. The Core Layer is fully compatible with ISDB-TB and is multiplexed with the Enhanced Layer. Simulation results of the Enhanced Layer using a powerful channel coder with modulation up to 256-QNUC and Non-Uniform Constellation are presented. The ISDB-TB LDM can improve the spectral efficiency and useful bit rate so that it becomes possible to use it in the transition for UHDTV applications. The Enhanced Layer uses the same BICM of ATSC 3.0, with LDPC encoder concatenated with the BCH. The implementation was done using the GNU Radio Companion software and Software Defined Radio. The Maximal Ratio Combining technique was proposed to increase the robustness of the system. This solution is an alternative way to introduce a new digital terrestrial broadcasting system using the same channel and infrastructure.