TRANSMISSION METHOD OF ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING MODULATED SIGNAL

摘要

PROBLEM TO BE SOLVED: To provide a transmission code constitution for reducing a code error rate of a transmitted information code in an orthogonal frequency division multiplexing modulation (OFDM) transmission apparatus. SOLUTION: A 0 frequency carrier (carrier imparting dc components) of a baseband signal to be multiplexed in the OFDM system uses a BPSK system as a modulation system. Thus, a code of a carrier in which a code error frequently occurs because of a deviation of a DC level, does not increase the code error rate in the entire transmission code, and the code error rate of the transmitted code can be reduced without expanding circuit scale. COPYRIGHT: (C)2004,JPO&NCIPI