Signal generating method and signal generating device

A transmission method comprising:napplying precoding to a first modulated signal s1 and a second modulated signal s2 to generate a first precoded signal z⬲1 and a second precoded signal z⬲2, the first modulated signal s1 having been modulated by a first modulation scheme at a modulation level denoted by a, the second modulated signal s2 having been modulated by a second modulation scheme at a modulation level denoted by b, and a and b being integers satisfying a<b;performing a phase change on at least one of the first precoded signal z⬲1 and the second precoded signal z⬲2 to generate a first transmission signal z1 and a second transmission signal z2; andtransmitting the first transmission signal z1 and the second transmission signal z2 respectively from a first antenna and a second antenna at the same time at the same frequency,the precoding being represented by a precoding matrix

A transmission apparatus comprising:na weighting unit applying precoding to a first modulated signal s1 and a second modulated signal s2 to generate a first precoded signal z⬲1 and a second precoded signal z⬲2,a phase changer performing a phase change on at least one of the first precoded signal z⬲1 and the second precoded signal z⬲2 to generate a first transmission signal z1 and a second transmission signal z2; anda transmission unit transmitting the first transmission signal z1 and the second transmission signal z2 respectively from a first antenna and a second antenna at the same time at the same frequency,the first modulated signal s1 having been modulated by a first modulation scheme at a modulation level denoted by a, the second modulated signal s2 having been modulated by a second modulation scheme at a modulation level denoted by b, and a and b being integers satisfying a<b,the precoding being represented by a precoding matrix

A reception method comprising:nacquiring a reception signal obtained by receiving a first transmission signal z1 and a second transmission signal z2 respectively transmitted from a first antenna and a second antenna at the same time at the same frequency, the first transmission signal z1 and the second transmission signal z2 having been generated by a predetermined generation process; andobtaining reception data by applying a demodulation process corresponding to the predetermined generation process to the reception signal,the predetermined generation process including:napplying precoding to a first modulated signal s1 and a second modulated signal s2 to generate a first precoded signal z⬲1 and a second precoded signal z⬲2; andperforming a phase change on at least one of the first precoded signal z⬲1 and the second precoded signal z⬲2 to generate the first transmission signal z1 and the second transmission signal z2,the first modulated signal s1 having been modulated by a first modulation scheme at a modulation level denoted by a, the second modulated signal s2 having been modulated by a second modulation scheme at a modulation level denoted by b, a and b being integers satisfying a<b,the precoding being represented by a precoding matrix

A reception apparatus comprising:nan acquiring unit acquiring a reception signal obtained by receiving a first transmission signal z1 and a second transmission signal z2 respectively transmitted from a first antenna and a second antenna at the same time at the same frequency, the first transmission signal z1 and the second transmission signal z2 having been generated by a predetermined generation process; anda demodulator obtaining reception data by applying a demodulation process corresponding to the predetermined generation process to the reception signal,the predetermined generation process including:napplying precoding to a first modulated signal s1 and a second modulated signal s2 to generate a first precoded signal z⬲1 and a second precoded signal z⬲2; andperforming a phase change on at least one of the first precoded signal z⬲1 and the second precoded signal z⬲2 to generate the first transmission signal z1 and the second transmission signal z2,the first modulated signal s1 having been modulated by a first modulation scheme at a modulation level denoted by a, the second modulated signal s2 having been modulated by a second modulation scheme at a modulation level denoted by b, a and b being integers satisfying a<b,the precoding being represented by a precoding matrix