A transmission method, comprising: generating a plurality of first modulated signals s1(i) and a plurality of second modulated signals s2(i) from transmission data, where i is a symbol number that is an integer greater than or equal to 0, the plurality of first modulated signals s1(i) being signals generated using a 16QAM modulation scheme, and the plurality of second modulated signals s2(i) being signals generated using uniform constellation 64QAM modulation; generating, from the plurality of first modulated signals s1(i) and the plurality of second modulated signals s2(i), a plurality of first signal-processed signals z1(i) and a plurality of second signal-processed signals z2(i) which satisfy Equation, [MATH. 1] z 1 i z 2 i = F u 0 0 v s 1 i s 2 i where [MATH. 2] u = α × 2 5 ν = α × 3 5 F = β × cos π 4 − β × sin π 4 β × sin π 4 β × cos π 4 α and β are arbitrary real numbers or imaginary numbers; transmitting the plurality of first signal-processed signals z1(i) and the plurality of second signal-processed signals z2(i) using a plurality of antennas, wherein among the plurality of first signal-processed signals z1(i) and the plurality of second signal-processed signals z2(i), a first signal-processed signal and a second signal-processed signal that have identical symbol numbers are simultaneously transmitted at the same frequency; and changing a value of coefficient u expressed by Equation and a value of coefficient v expressed by Equation when a 64QAM modulation used to generate the plurality of second modulated signals s2(i) is switched from the uniform constellation 64QAM modulation to a non-uniform constellation 64QAM modulation. generating a plurality of first modulated signals s1(i) and a plurality of second modulated signals s2(i) from transmission data, where i is a symbol number that is an integer greater than or equal to 0, the plurality of first modulated signals s1(i) being signals generated using a 16QAM modulation scheme, and the plurality of second modulated signals s2(i) being signals generated using uniform constellation 64QAM modulation; generating, from the plurality of first modulated signals s1(i) and the plurality of second modulated signals s2(i), a plurality of first signal-processed signals z1(i) and a plurality of second signal-processed signals z2(i) which satisfy Equation, [MATH. 1] z 1 i z 2 i = F u 0 0 v s 1 i s 2 i where [MATH. 2] u = α × 2 5 ν = α × 3 5 F = β × cos π 4 − β × sin π 4 β × sin π 4 β × cos π 4 α and β are arbitrary real numbers or imaginary numbers; transmitting the plurality of first signal-processed signals z1(i) and the plurality of second signal-processed signals z2(i) using a plurality of antennas, wherein among the plurality of first signal-processed signals z1(i) and the plurality of second signal-processed signals z2(i), a first signal-processed signal and a second signal-processed signal that have identical symbol numbers are simultaneously transmitted at the same frequency; and changing a value of coefficient u expressed by Equation and a value of coefficient v expressed by Equation when a 64QAM modulation used to generate the plurality of second modulated signals s2(i) is switched from the uniform constellation 64QAM modulation to a non-uniform constellation 64QAM modulation.