At NHK Science & Technology Research Laboratories, we are conducting research and development on highly efficient and large-capacity transmission technology for next generation terrestrial broadcasting in order to achieve large-volume content services such as Super Hi-Vision. We developed a new transmission system based on conventional digital terrestrial television broadcasting, ISDB-T, and applied a combination of ultra-multilevel OFDM and dual-polarized MIMO to expand the transmission

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... y. This paper describes the technologies that can expand the transmission capacity, and the methods for improving the transmission characteristics.