Patent ID: 8868122
Filing Date: 2014-10-21
Classification: H04L,H04W

Abstract:
1. A user apparatus to which radio access schemes that are 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 a 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 a radio resource to the modulated symbol sequence on which discrete Fourier transform has been performed by the discrete Fourier transform unit or to the modulated symbol sequence on which serial parallel conversion has been performed by the serial parallel conversion unit to generate a frequency domain signal; a transmission signal generation unit configured to perform inverse fast Fourier transform on the frequency domain signal generated by the frequency domain signal generation unit to generate a transmission signal; a transmission power control unit configured to perform transmission power control according to the radio access scheme set by the radio access scheme setting unit and to a radio resource scheduled for the user apparatus; and an RF unit configured to convert the transmission signal generated by the transmission signal generation unit to a radio frequency, and to transmit the transmission signal according to the transmission power control by the transmission power control unit, the user apparatus further comprising a waveform shaping filter configured to perform waveform shaping based on a roll-off rate determined by a base station apparatus, wherein when the radio access scheme set by the radio access scheme setting unit is the multicarrier scheme, the roll-off rate is zero, and when the radio access scheme set by the radio access scheme setting unit is the single-carrier scheme, the roll-off rate is a value determined based on a radius of a cell covered by the base station apparatus.