Patent ID: 8644399
Filing Date: 2014-02-04
Classification: H04L,H04W

Abstract:
1. A transmission apparatus that transmits a multicarrier signal where a plurality of subcarriers are disposed at predetermined frequency intervals, characterized by comprising: a transmission avoidance processing unit that replaces signals corresponding to subcarriers, in the plurality of subcarriers, at frequency positions where transmission is avoided with a null signal; a transform unit that carries out processing including an inverse Fourier transform on an output signal of the transmission avoidance processing unit to convert the output to the multicarrier signal; a transmission power setting unit that amplifies a transmission power of the multicarrier signal outputted from the transform unit in accordance with the subcarriers replaced with the null signal by the transmission avoidance processing unit; a repeated signal appending unit that disposes part of an effective symbol of the output signal subjected to the inverse Fourier transform by the transform unit as a repeated signal before and/or after the effective symbol; a multiplying unit that multiplies an output of the repeated signal appending unit by a predetermined window function; a waveform shaping unit that adds an effective symbol of an end part whose energy has attenuated due to multiplication by the window function to an opposite end part of an output of the multiplying unit, characterized in that an output of the waveform shaping unit is supplied to the transmission power setting unit; and a transmission unit that transmits the amplified signal.