Japan Broadcasting Corporation (NHK) has been conducting research on the development of advanced terrestrial broadcasting technology to transmit ultra-high-definition television signals. To analyse the transmission characteristics of the proposed system, we designed a prototype modulator and demodulator and measured its performance through laboratory experiments. Further, we also evaluated the proposed system via largescale field trials in conditions similar to those of actual broadcast propagation environments.
This paper presents the concept and specifications of the advanced ISDBT system under study. The verification results of a computer simulation, and laboratory and large-scale field experiments are also described.
In Japan, 4K/8K ultra-high-definition television (UHDTV) broadcasting by satellite was launched on December 1, 2018. Meanwhile, several studies on a next-generation digital terrestrial television broadcasting (DTTB) system have been conducted widely in Japan. Since 2007, Japan Broadcasting Corporation (NHK) has been conducting research and development on large-capacity transmission technologies for terrestrial 4K/8K UHDTV broadcasting. We have successfully carried out 8K transmission experiments using higher-order modulation and dual-polarised multi-input multi-output (MIMO) technologies, and mobile reception experiments of 2K (HDTV) using dual-polarised MIMO technology.
Since 2016, we have been researching and developing transmission systems for a next-generation DTTB as a part of the research program “Research and Development for Advanced Digital Terrestrial TV Broadcasting System” under the auspices of the Ministry of Internal Affairs and Communications, Japan. We have proposed a system called the advanced Integrated Services Digital Broadcasting-Terrestrial (advanced ISDB-T). The transmission characteristics of the advanced ISDB-T exceed those of ISDB-T. In this paper, we describe the concept and specifications of the advanced ISDB-T. We also present the verification results of a computer simulation, and laboratory and large-scale field experiments.