Patent ID: 8798193

Claim:
A transmission method performed by a transmission apparatus having four antennas, comprising: selecting a transmission scheme, for transmitting a plurality of transmission signals, among a plurality of transmission schemes according to a number of a plurality of antennas used for a transmission; selecting a modulation scheme among a plurality of modulation schemes according to the number of a plurality of antennas used for a transmission; modulating the plurality of transmission signals using the selected modulation scheme; outputting a plurality of modulated transmission signals; and transmitting the plurality of modulated transmission signals using the plurality of antennas used for the transmission among the four antennas, wherein: the selecting of a modulation scheme includes: selecting, when the four antennas are used for the transmission, a modulating scheme in which a maximum value of a number of modulated M-ary index of the selected modulation scheme is smaller than a maximum value of a number of modulated M-ary index of the modulation scheme selected when two antennas among the four antennas are used for the transmission, and selecting, when the two antennas are used for the transmission, a modulating scheme having a same maximum value of a number of modulated M-ary index for every selected transmission scheme.