A transmission method comprising: first generating processing of generating a first orthogonal frequency division modulated (OFDM) symbol including a plurality of first modulated signals s1(k) and plurality of first pilot signals, and a second OFDM symbol including a plurality of second modulated signals s2(k) and plurality of second pilot signals, k denoting carrier number, each of the plurality of first modulated signals s1(k) corresponding to any one of 16 signal points comprised in a first mapping scheme, the second modulated signal s2(k) being equal to the first modulated signal s1(k) for each of the carrier number k, first phase change processing of performing a first phase change on the plurality of second modulated signals s2(k) using amounts of the first phase change specified by a function of the carrier number k, first transmission processing of transmitting the plurality of first modulated signals s1(k) using a first antenna and transmitting the plurality of second modulated signals s2(k) using a second antenna, the first modulated signal s1(k) and the second modulated signal s2(k) are transmitted at a same frequency and a same first time for each of the carrier number k, second generating processing of generating a third OFDM symbol including a plurality of third modulated signals s3(k) and a fourth OFDM symbol including a plurality of fourth modulated signals s4(k), each of the plurality of third modulated signals s3(k) corresponding to any one of 16 signal points comprised in a second mapping scheme, the first mapping scheme and the second mapping scheme being different from each other in a signal point arrangement; the fourth modulated signal s4(k) being equal to the third modulated signal s3(k) for each of the carrier number k, second phase change processing of performing a second phase change on the plurality of fourth modulated signals s4(k) using amounts of the second phase change specified by the function of the carrier number k, and second transmission processing of transmitting the plurality of third modulated signals s3(k) using the first antenna and transmitting the plurality of fourth modulated signals s4(k) using the second antenna, the third modulated signal s3(k) and the fourth modulated signal s4(k) are transmitted at a same frequency and a same second time for each of the carrier number k, wherein the second time is different from the first time. first generating processing of generating a first orthogonal frequency division modulated (OFDM) symbol including a plurality of first modulated signals s1(k) and plurality of first pilot signals, and a second OFDM symbol including a plurality of second modulated signals s2(k) and plurality of second pilot signals, k denoting carrier number, each of the plurality of first modulated signals s1(k) corresponding to any one of 16 signal points comprised in a first mapping scheme, the second modulated signal s2(k) being equal to the first modulated signal s1(k) for each of the carrier number k, k denoting carrier number, each of the plurality of first modulated signals s1(k) corresponding to any one of 16 signal points comprised in a first mapping scheme, the second modulated signal s2(k) being equal to the first modulated signal s1(k) for each of the carrier number k, first phase change processing of performing a first phase change on the plurality of second modulated signals s2(k) using amounts of the first phase change specified by a function of the carrier number k, first transmission processing of transmitting the plurality of first modulated signals s1(k) using a first antenna and transmitting the plurality of second modulated signals s2(k) using a second antenna, the first modulated signal s1(k) and the second modulated signal s2(k) are transmitted at a same frequency and a same first time for each of the carrier number k, second generating processing of generating a third OFDM symbol including a plurality of third modulated signals s3(k) and a fourth OFDM symbol including a plurality of fourth modulated signals s4(k), each of the plurality of third modulated signals s3(k) corresponding to any one of 16 signal points comprised in a second mapping scheme, the first mapping scheme and the second mapping scheme being different from each other in a signal point arrangement; the fourth modulated signal s4(k) being equal to the third modulated signal s3(k) for each of the carrier number k, each of the plurality of third modulated signals s3(k) corresponding to any one of 16 signal points comprised in a second mapping scheme, the first mapping scheme and the second mapping scheme being different from each other in a signal point arrangement; the fourth modulated signal s4(k) being equal to the third modulated signal s3(k) for each of the carrier number k, second phase change processing of performing a second phase change on the plurality of fourth modulated signals s4(k) using amounts of the second phase change specified by the function of the carrier number k, and second transmission processing of transmitting the plurality of third modulated signals s3(k) using the first antenna and transmitting the plurality of fourth modulated signals s4(k) using the second antenna, the third modulated signal s3(k) and the fourth modulated signal s4(k) are transmitted at a same frequency and a same second time for each of the carrier number k, wherein the second time is different from the first time.