Communication apparatus and communication method thereof

摘要

The present invention is provided to improve transmission efficiency by preventing interference between different networks during data transmission using a multicarrier communication method. A transmitter includes a phase vector setting unit and a multicarrier modulator. The phase vector setting unit rotates a phase of transmission data corresponding to each subcarrier signal in an OFDM multicarrier signal, by generating a randomized phase vector for each subcarrier signal. The multicarrier modulator modulates the multicarrier signal as transmission data by using an inverse Fourier transform or an inverse wavelet transform. The phase vector setting unit changes a phase vector according to the status of a transmission line or the status of another network.