Ofdm transmitting and receiving apparatus

Abstract: An OFDM transmitting and receiving apparatus comprises below units. A receiving unit receives an OFDM signal transmitted from a destination transmitting and receiving apparatus. A computing unit computes a value of a channel response characteristic of each of transmission channels corresponding to subcarriers contained in the OFDM signal received, and obtains a computed value. A comparing unit compares the computed value with a predetermined threshold value, and computes a ratio of the number of the subcarriers including the value of the channel response characteristic higher than the predetermined threshold value, to the number of all the subcarriers, and obtaining a computed ratio. A setting unit sets a transmission condition based on at least the computed ratio. A transmitting unit transmits an OFDM signal based on the transmission condition set. (end of abstract)