A signal processing method, wherein the method is applied to an orthogonal frequency division multiplexing, OFDM, wireless transmission system, the system comprises at least two OFDM symbols, and the method comprises: dividing, by a transmitter, the first OFDM symbol of the at least two OFDM symbols into F parts, wherein F ≥ 2 ; adding, by the transmitter, a zero power padding, ZP, to a tail end of divided data of each part obtained after dividing the first OFDM symbol of the at least two OFDM symbols; adding, by the transmitter, data of N w ƒ consecutive points at a head end of divided data of a part f + 1 obtained after dividing the first OFDM symbol of the at least two OFDM symbols to a start location in a ZP at a tail end of divided data of a part f , so that the data of the N w ƒ points is used as a suffix of the divided data of the part f ; and adding data of N w F − 1 consecutive points at a head end of divided data of a part 0 to a start location in a ZP at a tail end of divided data of a part F - 1, so that the data of the N w F − 1 points is used as a suffix of the divided data of the part F - 1, wherein 0 ≤ f < F ; and performing, by the transmitter, point multiplication processing with symmetric time domain window function on the data of the N w ƒ consecutive points at the head end of the divided data of the part f + 1 and the data of the N w ƒ points in the suffix at the tail end of the divided data of the part f , so that the sum of the point coefficients corresponding to the symmetric window function is 1; and performing point multiplication processing with symmetric time domain window function on the data of the N w F − 1 consecutive points at the head end of the divided data of the part 0 and the data of the N w F − 1 points in the suffix at the tail end of the divided data of the part F - 1, so that the sum of the point coefficients corresponding to the symmetric window function is 1. dividing, by a transmitter, the first OFDM symbol of the at least two OFDM symbols into F parts, wherein F ≥ 2 ; adding, by the transmitter, a zero power padding, ZP, to a tail end of divided data of each part obtained after dividing the first OFDM symbol of the at least two OFDM symbols; adding, by the transmitter, data of N w ƒ consecutive points at a head end of divided data of a part f + 1 obtained after dividing the first OFDM symbol of the at least two OFDM symbols to a start location in a ZP at a tail end of divided data of a part f , so that the data of the N w ƒ points is used as a suffix of the divided data of the part f ; and adding data of N w F − 1 consecutive points at a head end of divided data of a part 0 to a start location in a ZP at a tail end of divided data of a part F - 1, so that the data of the N w F − 1 points is used as a suffix of the divided data of the part F - 1, wherein 0 ≤ f < F ; and performing, by the transmitter, point multiplication processing with symmetric time domain window function on the data of the N w ƒ consecutive points at the head end of the divided data of the part f + 1 and the data of the N w ƒ points in the suffix at the tail end of the divided data of the part f , so that the sum of the point coefficients corresponding to the symmetric window function is 1; and performing point multiplication processing with symmetric time domain window function on the data of the N w F − 1 consecutive points at the head end of the divided data of the part 0 and the data of the N w F − 1 points in the suffix at the tail end of the divided data of the part F - 1, so that the sum of the point coefficients corresponding to the symmetric window function is 1. <EOS>