Patent ID: 8731082
Filing Date: 2014-05-20
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 by 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 first operator that generates first data by multiplying a first matrix by the subcarrier modulation signal, the first matrix being a predetermined non-singular matrix for modulating the subcarrier modulation signal with the subcarriers; a second operator that generates second data by multiplying a matrix calculated by multiplying the first matrix by a transformation matrix which is a predetermined non-singular matrix having a same size as the first matrix by the subcarrier modulation signal, or multiplying the transformation matrix by the first data, a product of a transposed conjugate matrix of the transformation matrix and the transformation matrix coinciding with or substantially coinciding with a unit matrix, a sum of the transposed conjugate matrix of the transformation matrix and the transformation matrix coinciding with or substantially coinciding with a zero matrix; a synthesizer that generates a baseband signal from data obtained by adding the second data to the first data, or data obtained by subtracting the second data from the first data; and a transmitter that generates a transmission signal from the baseband signal, and transmits the transmission signal.