DIGITAL SIGNAL TRANSMISSION/RECEPTION METHOD, TRANSCEIVING APPARATUS AND TRANSMISSION/RECEPTION SYSTEM

PROBLEM TO BE SOLVED: To quickly synchronize received OFDM signals when received field strength is of such low field strength as the noise level or below. SOLUTION: A transmitter outputs and transmits OFDM signals from an IFFT part 5. For AC data in the OFDM signals, TMCC signals are inserted to the AC data in all symbols or a frame synchronization word in the TMCC signals is inserted to the AC data of the symbol for transmitting the frame synchronization word in the TMCC signals. The frame synchronization part 15 of a receiver adds the TMCC signals and AC signals within one symbol and calculates a correlation value. By the addition, a correlation peak value is improved compared to the case of adding only an amplitude in one symbol of demodulated TMCC signals. Thus, even when the received field strength is of such low field strength as the noise level or below, the peak of the correlation value can be detected. COPYRIGHT: (C)2010,JPO&INPIT