DIGITAL AUDIO BROADCASTING SYSTEM IN FM BAND

摘要

PURPOSE: A DAB(Digital Audio Broadcasting) system in an FM(Frequency Modulation) band is provided to implement a DAB service and to maintain a data transmission speed, and to easily convert an analog broadcasting into a digital broadcasting. CONSTITUTION: A DAB(Digital Audio Broadcasting) system installs a hybrid DAB system applied to a channel having an existing analog FM(Frequency Modulation) signal and an all digital DAB system applied to a channel not-having the analog FM signal, and perform a DAB in an FM band. The hybrid DAB system performs an FM relating to a sampling signal to generate an FM signal. The hybrid DAB system performs an audio coding, a channel coding, an interleaving relating to the sampling signal, and modulates the signal by an OFDM(Orthogonal Frequency Division Multiplexing) modulator to generate a DAB signal. The all digital DAB system performs the audio coding, the channel coding, the interleaving relating to a sampling audio signal and modulates the sampling audio signal by the OFDM modulator to generate the DAB signal, then transmits the DAB signal to the FM band.