Patent ID: 8995566
Filing Date: 2015-03-31
Classification: H04L

Abstract:
1. A communication apparatus for communicating with another apparatus in orthogonal frequency-division multiplexing wireless communication, the communication apparatus comprising: a modulator that modulates an input signal using a predetermined modulation scheme, and assigns the modulated input signal to subcarriers with frequency components orthogonal to each other, thereby generating a subcarrier modulation signal; a transformer that performs an inverse fast Fourier transformation on the subcarrier modulation signal; a decomposer that decomposes a calculation result of the transformer into real part data which is a real part of the calculation result, and imaginary part data which is an imaginary part of the calculation result; a calculator that, using a predetermined positive threshold value smaller than a maximum value among elements of an input data which is the real part data or the imaginary part data, and a predetermined negative threshold value greater than a minimum value among the elements of the input data, with respect to each element a value of which is equal to or greater than the positive threshold value among the elements of the input data, applies a predetermined calculation which reduces a difference between the value of the each element and the positive threshold value, and with respect to each element a value of which is equal to or less than the negative threshold value among the elements of the input data, applies a predetermined calculation which reduces a difference between the value of the each element and the negative threshold value; a synthesizer that generates a baseband signal based on synthesized data in which the real part data and the imaginary part data applied the calculation by the calculator are synthesized; and a transmitter that generates a transmission signal from the baseband signal to transmit.