Patent ID: 8494080

Claim:
A reception device which receives a signal transmitted by a transmission device, the reception device comprising: an equalization unit configured to equalize a received signal in frequency domain; a reliability calculation unit configured to calculate the reliability of a transmitted bit from the received signal after equalization; a mutual information amount calculation unit configured to calculate a mutual information amount based on the reliability of the transmitted bit calculated by the reliability calculation unit; and a notification signal generation unit configured to set at least one of a modulation scheme and a coding rate based on the mutual information amount calculated by the mutual information amount calculation unit to generate a signal to be reported to the transmission device, wherein the mutual information amount indicates how much information the reception device has obtained regarding the signal transmitted by the transmission device, the reception device receives the signal transmitted by the transmission device which changes at least one of a modulation scheme and a coding rate, and the reliability calculation unit calculates a log likelihood ratio based on an equivalent amplitude gain or a variance of equivalent noise.