Patent ID: 8817906
Filing Date: 2014-08-26
Classification: H04L

Abstract:
1. A communication device which communicates with another device by wireless communication in an orthogonal frequency division multiplexing manner, the communication device comprising: a modulator modulating an input signal in a predetermined modulation manner to generate a primary modulation signal, assigning a predetermined number of any complex numbers and elements of the primary modulation signal to subcarriers frequency components of which are orthogonal to each other to generate a subcarrier modulation signal; an IFFT calculator applying an inverse fast fourier transform to the subcarrier modulation signal to generate a converted signal; a decomposer decomposing the converted data into real-part data that is a real part of the converted data and imaginary-part data that is an imaginary part of the converted data; a calculator subtracting, from each element of the real-part data, a linear combination of the elements of the real-part data obtained using coefficients each of which is a real number of 0 or more and which total 1, wherein the linear combination of the elements of the real-part data is an average value of a maximum value and a minimum value of the elements of the real-part data, an average value of the elements of the real-part data, or a median of the elements of the real-part data, and subtracting, from each element of the imaginary-part data, a linear combination of the elements of the imaginary-part data obtained using coefficients each of which is a real number of 0 or more and which total 1, wherein the linear combination of the elements of the imaginary-part data is an average value of a maximum value and a minimum value of the elements of the imaginary-part data, an average value of the elements of the imaginary-part data, or a median of the elements of the imaginary-part data; a combiner generating a baseband signal based on data that is a combination of the real-part data and the imaginary-part data calculated by the calculator; and a transmitter generating a transmission signal from the baseband signal and transmitting the transmission signal.