抄録
The transmission method for Digital Terrestrial Television Broadcasting has been proposed to use OFDM (Orthogonal Frequency Division Multiplexing) in Japan. OFDM has robustness against multi path distortions compared with other digital modulation schemes. Nevertheless, 64QAM modulated OFDM signals considerably degrade in the presence of strong multi path distortion. This paper proposes tow methods of soft decision decoding of 64QAM-OFDM. The proposed methods make use of the channel estimation of each OFDM carriers, consequently show powerful performance.
