Patent ID: 8559297

Claim:
A user apparatus to which radio access schemes of a single-carrier scheme and a multicarrier scheme are applied, comprising: a radio access scheme setting unit configured to set a radio access scheme; a discrete Fourier transform unit configured to perform discrete Fourier transform on a modulated symbol sequence when the radio access scheme set by the radio access scheme setting unit is the single-carrier scheme; a serial parallel conversion unit configured to perform serial parallel conversion on the modulated symbol sequence when the radio access scheme set by the radio access scheme setting unit is the multicarrier scheme; a frequency domain signal generation unit configured to assign radio resources to the modulated symbol sequence on which discrete Fourier transform has been performed by the discrete Fourier transform unit or to the demodulated symbol sequence on which serial parallel conversion has been performed by the serial parallel conversion unit so as to generate a signal in the frequency domain; a waveform shaping filter configured to perform waveform shaping on the signal in the frequency domain generated by the frequency domain signal generation unit; a transmission signal generation unit configured to perform inverse fast Fourier transform on the signal in the frequency domain on which waveform shaping has been performed by the waveform shaping filter so as to generate a transmission signal; and a transmission unit configured to transmit the transmission signal generated by the transmission signal generation unit by radio, wherein a roll-off factor of the waveform shaping filter is set to be 0 when the radio access scheme set by the radio access scheme setting unit is the multicarrier scheme, and the roll-off factor of the waveform shaping filter is set based on a radius of a cell covered by the base station apparatus when the radio scheme is the single-carrier scheme.