GAP FILLER APPARATUS FOR PROVIDING A CYCLIC DELAY DIVERSITY IN A DIGITAL MULTIMEDIA BROADCASTING SYSTEM, METHOD AND BROADCASTING RELAY NETWORK USING THE SAME

摘要

The present invention relates to a relay device in the relay device and its method, and the relay device is a digital multimedia broadcasting system as a broadcast relay network using the same for providing a digital multimedia broadcasting service using a cyclic delay diversity, transmitting a broadcasting signal and a receiver for receiving an OFDM signal, acquiring a symbol synchronization of the OFDM signal with the well determine a sample length of the cyclic delay of the OFDM symbol within the guard interval of the OFDM symbol identified by the symbol synchronization, and the determined and the symbol synchronization unit that outputs the rotation delaying the OFDM signal by the sample length, and an amplifier for amplifying the circulating delayed OFDM signal, characterized in that it comprises a transmitter for transmitting the amplified OFDM signal to the radio network. Therefore, in accordance with the present invention, by transmitting a transmission signal in accordance with a cyclic delay in the design approach DMB terrestrial repeater it can significantly improve the performance deterioration problem of the shade area in the terrestrial DMB. ; DMB, a repeater, a cyclic delay diversity, OFDM signals