A transmission method, comprising: encoding processing that generates a first encoded block (105A, #1) and a second encoded block (105B, #2) using forward error correction coding scheme; modulation processing that - generates a plurality of first symbols and a plurality of second symbols from the first encoded block (#1), wherein among symbols generated from the first encoded block, odd symbols (#1-1, #1-3, #1-5) belong to the plurality of first symbols and even symbols (#1-2, #1-4, #1-6) belong to the plurality of second symbols; and - generates a plurality of third symbols and a plurality of fourth symbols from the second encoded block (#2), wherein among symbols generated from the second encoded block, odd symbols (#2-1, #2-3, #2-5) belong to the plurality of third symbols and even symbols (#2-2, #2-4, #2-6) belong to the plurality of fourth symbols; phase change processing that changes a phase of the plurality of second symbols and the plurality of fourth symbols; transmission processing that - generates a first frame by arranging, along the frequency axis, the first symbols and the third symbols altematingly on data carriers of the first frame, wherein the first symbols are assigned to odd data carriers of the data carriers of the first frame and the third symbols are assigned to even data carriers of the data carriers of the first frame, and - generates a second frame by arranging, along the frequency axis, the second symbols and the fourth symbols altematingly on data carriers of the second frame, wherein the second symbols are assigned to odd data carriers of the data carriers of the second frame and the fourth symbols are assigned to even data carriers of the data carriers of the second frame; and - transmits the first frame and the second frame simultaneously by using a plurality of antennas (112A, 112B), wherein the phase change processing applies the phase change value y(k) to each data carrier $(2k+1) and data carrier $(2k+2) of the second frame, k being an integer that is greater than or equal to 0. encoding processing that generates a first encoded block (105A, #1) and a second encoded block (105B, #2) using forward error correction coding scheme; modulation processing that - generates a plurality of first symbols and a plurality of second symbols from the first encoded block (#1), wherein among symbols generated from the first encoded block, odd symbols (#1-1, #1-3, #1-5) belong to the plurality of first symbols and even symbols (#1-2, #1-4, #1-6) belong to the plurality of second symbols; and - generates a plurality of third symbols and a plurality of fourth symbols from the second encoded block (#2), wherein among symbols generated from the second encoded block, odd symbols (#2-1, #2-3, #2-5) belong to the plurality of third symbols and even symbols (#2-2, #2-4, #2-6) belong to the plurality of fourth symbols; - generates a plurality of first symbols and a plurality of second symbols from the first encoded block (#1), wherein among symbols generated from the first encoded block, odd symbols (#1-1, #1-3, #1-5) belong to the plurality of first symbols and even symbols (#1-2, #1-4, #1-6) belong to the plurality of second symbols; and - generates a plurality of third symbols and a plurality of fourth symbols from the second encoded block (#2), wherein among symbols generated from the second encoded block, odd symbols (#2-1, #2-3, #2-5) belong to the plurality of third symbols and even symbols (#2-2, #2-4, #2-6) belong to the plurality of fourth symbols; phase change processing that changes a phase of the plurality of second symbols and the plurality of fourth symbols; transmission processing that - generates a first frame by arranging, along the frequency axis, the first symbols and the third symbols altematingly on data carriers of the first frame, wherein the first symbols are assigned to odd data carriers of the data carriers of the first frame and the third symbols are assigned to even data carriers of the data carriers of the first frame, and - generates a second frame by arranging, along the frequency axis, the second symbols and the fourth symbols altematingly on data carriers of the second frame, wherein the second symbols are assigned to odd data carriers of the data carriers of the second frame and the fourth symbols are assigned to even data carriers of the data carriers of the second frame; and - transmits the first frame and the second frame simultaneously by using a plurality of antennas (112A, 112B), - generates a first frame by arranging, along the frequency axis, the first symbols and the third symbols altematingly on data carriers of the first frame, wherein the first symbols are assigned to odd data carriers of the data carriers of the first frame and the third symbols are assigned to even data carriers of the data carriers of the first frame, and - generates a second frame by arranging, along the frequency axis, the second symbols and the fourth symbols altematingly on data carriers of the second frame, wherein the second symbols are assigned to odd data carriers of the data carriers of the second frame and the fourth symbols are assigned to even data carriers of the data carriers of the second frame; and - transmits the first frame and the second frame simultaneously by using a plurality of antennas (112A, 112B), wherein the phase change processing applies the phase change value y(k) to each data carrier $(2k+1) and data carrier $(2k+2) of the second frame, k being an integer that is greater than or equal to 0.