Patent ID: 8681688

Claim:
An OFDM transmission apparatus comprising: a variable-spreading-factor spreading section configured to perform discrete Fourier transform on data signals to generate n sets of spread signals, n being a value equal to or greater than 1; a sub-carrier allocation section configured to allocate said n sets of spread signals to a plurality of sub-carriers; an inverse discrete Fourier transform section configured to perform inverse discrete Fourier transform on said n sets of spread signals allocated; and a control section configured to control, according to the value of n, a limit of a power for transmitting IDFT transformed said n sets of spread signals, wherein the control section is further configured to control the limit of the power in a case that the value of n is equal to or greater than a value of 2 to be smaller than the limit of the power in a case that the value of n is equal to 1.