A symbol processing method, comprising: obtaining a plurality of complex-valued symbols; dividing the plurality of complex-valued symbols into a plurality of sets, wherein each set corresponds to one transmitted symbol, the plurality of sets comprise a first set corresponding to a first transmitted symbol and a second set corresponding to a second transmitted symbol, the first transmitted symbol and the second transmitted symbol are consecutive in time domain, and the first transmitted symbol is located before the second transmitted symbol; performing a copy operation on the first set and the second set, so that both the first set and the second set have first complex-valued symbols, wherein a time domain index of a start location of a first subset including the first complex-valued symbols in the first set is the same as a time domain index of a start location of a second subset including the first complex-valued symbols in the second set; and after the copy operation, performing signal processing on the first set and the second set, wherein the signal processing comprises a cyclic shift or frequency domain weighting, and through the signal processing, the start location of the first subset corresponds to a location preceding a first reference point of the first transmitted symbol, an end location of the first subset corresponds to a location following the first reference point of the first transmitted symbol, the start location of the second subset corresponds to a location preceding a second reference point of the second transmitted symbol, and an end location of the second subset corresponds to a location following the second reference point of the second transmitted symbol, wherein the first reference point represents an end location of a transmitted symbol, and the second reference point represents a location from which a cyclic prefix is obtained through truncation in a transmitted symbol. obtaining a plurality of complex-valued symbols; dividing the plurality of complex-valued symbols into a plurality of sets, wherein each set corresponds to one transmitted symbol, the plurality of sets comprise a first set corresponding to a first transmitted symbol and a second set corresponding to a second transmitted symbol, the first transmitted symbol and the second transmitted symbol are consecutive in time domain, and the first transmitted symbol is located before the second transmitted symbol; performing a copy operation on the first set and the second set, so that both the first set and the second set have first complex-valued symbols, wherein a time domain index of a start location of a first subset including the first complex-valued symbols in the first set is the same as a time domain index of a start location of a second subset including the first complex-valued symbols in the second set; and after the copy operation, performing signal processing on the first set and the second set, wherein the signal processing comprises a cyclic shift or frequency domain weighting, and through the signal processing, the start location of the first subset corresponds to a location preceding a first reference point of the first transmitted symbol, an end location of the first subset corresponds to a location following the first reference point of the first transmitted symbol, the start location of the second subset corresponds to a location preceding a second reference point of the second transmitted symbol, and an end location of the second subset corresponds to a location following the second reference point of the second transmitted symbol, wherein the first reference point represents an end location of a transmitted symbol, and the second reference point represents a location from which a cyclic prefix is obtained through truncation in a transmitted symbol.