A study on lower layer signal design of LDM-BSTOFDM for the next-generation DTTB

Hiroto Yamamoto, Akira Nakamura, Makoto Itami

Research output: Contribution to journalArticle


In this paper, the transmission scheme that combines LDM(Layered Division Multiplexing) with BSTOFDM(Band Segmented Transmission - Orthogonal Frequency Division Multiplexing) is proposed for the Japanese nextgeneration DTTB(Digital Terrestrial Television Broadcasting). The proposed LDM-BST-OFDM scheme provides a more effective frequency utilization and improvement of the performance in the stream for fixed reception. In addition, power boost of partial reception band for LDM-BST-OFDM is also studied in this paper. The performance of the proposed scheme is evaluated by computer simulations where the effectiveness of proposed scheme for fixed reception is shown. Although LDM-BST-OFDM scheme improves the performance, dedicated receivers that can demodulate LDM multiplexed symbols are required. Therefore, LDM-BST-OFDM scheme which can decode the stream for fixed reception even if LDM multiplexed symbols are not demodulated by using conventional fixed receivers is proposed. In this paper, "LDM-BST-OFDM using frequency diversity scheme" and "LDM-BST-OFDM using extended parity in lower layer of LDM" is proposed. The reception characteristics of the proposed scheme is evaluated by computer simulations.

Original languageEnglish
Pages (from-to)18-30
Number of pages13
JournalITE Transactions on Media Technology and Applications
Issue number1
Publication statusPublished - 1 Jan 2020



  • DTTB
  • Extended Parity
  • Frequency Diversity
  • LDM

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