Patent ID: 8300725

Claim:
A radio transmitting apparatus using a transmission format in which a subframe comprises a plurality of orthogonal frequency division multiplexing symbols, the apparatus comprising: a generating section that generates a reference signal for channel estimation of a spatial channel; an assigning section that assigns a data signal to a subcarrier in an orthogonal frequency division multiplexing symbol; a power adjusting section that adjusts transmission power of the reference signal such that the transmission power of the reference signal is greater than transmission power of the data signal; a reference signal multiplexing section that allocates the reference signal having the transmission power adjusted in the power transmission adjusting section at predetermined intervals in a frequency domain or a time domain of subcarriers in the orthogonal frequency division multiplexing symbol; and a transmitting section that performs an orthogonal frequency division multiplexing modulation with respect to the data signal and reference signal assigned to the subcarriers in the orthogonal frequency division multiplexing symbol and transmits an acquired orthogonal frequency division multiplexing modulation signal.