Devices for ISDB-T Transmitter

摘要

Digital terrestrial television broadcasting (DTTB) began in December 2003 in the metropolitan areas of the Kanto, Chukyo, and Kinki regions. With integrated services digital broadcasting-terrestrial (ISDB-T), which is the Japanese standard for DTTB, viewers can enjoy various types of broadcasting services. The transmission system of ISDB-T demands new digital technologies that do not exist in the conventional analog transmission system. Toshiba has therefore developed several devices for the ISDB-T transmission system. This paper introduces three of these devices: an orthogonal frequency division multiplex (OFDM) modulator for channel coding and OFDM modulation, an exciter for nonlinear compensation, and a power amplifier offering high performance and high efficiency. By means of these devices, the transport stream signal is converted to a high-power OFDM RF-signal in the UHF band.