METHOD AND APPARATUS FOR CREATING AND RECEIVING OTHORGONAL FREQUENCY DIVISION MULTIPLEXING SYMBOL

摘要

An apparatus and a method for generating and receiving OFDM(Orthogonal Frequency Division Multiplexing) symbols are provided to improve a PAPR(Peak to Average Power Ratio) characteristic by applying a weight to a digital symbol to generate the OFDM symbol. An apparatus for generating and receiving OFDM symbols includes a plurality of weight-applying units(105), a plurality of Fourier inverse-transforming units, and a signal selecting unit(117). The plurality of weight-applying units(105) corresponds to a plurality of weights, applies the corresponding weight to a digital modulation symbol group, and generates a weight-applied symbol group. The plurality of Fourier inverse-transforming units correspond to the plurality of weight-applying units(105), Fourier inverse-transforms the weight-applied symbol group which is generated by the corresponding weight-applying unit(105), and generates a Fourier inverse-transformed symbol group. The signal selecting unit(117) selects and outputs the Fourier inverse-transforming symbol group with the least PAPR among the Fourier inverse-transforming symbol groups generated by the plurality of Fourier inverse-transforming units.