Patent ID: 8170149

Claim:
An orthogonal frequency division multiplexing (OFDM) receiver apparatus for receiving an OFDM signal including a plurality of differential binary phase shift keying (DBPSK) signals transmitting identical information, comprising: an extraction unit which extracts the plurality of DBPSK signals from the OFDM signal; a phase difference calculation unit which calculates a phase difference between symbols of each of the plurality of extracted DBPSK signals; an accumulation unit which accumulates the plurality of phase differences obtained by the phase difference calculation unit; and a decision unit which decides data transmitted by the DBPSK signals based on a sign of an accumulated value which is an accumulation result obtained by the accumulation unit, wherein the DBPSK signal transmits a frame in a prescribed format, the accumulation unit cumulatively adds an accumulation result of a corresponding symbol in each frame in a plurality of frames, and the decision unit decides data transmitted by the DBPSK signal based on the cumulative addition result.