[Paper] A Study on Lower Layer Signal Design of LDM-BST-OFDM for the Next-Generation DTTB

抄録

In this paper, the transmission scheme that combines LDM(Layered Division Multiplexing) with BST-OFDM (Band Segmented Transmission - Orthogonal Frequency Division Multiplexing) is proposed for the Japanese next-generation 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.