Patent ID: 7633850

Claim:
A transmitter comprising: a coding section: a serial-to-parallel conversion section; a unitary matrix modulation section; a split section; an inverse Fourier transform section; and a transmitting section, wherein the coding section receives an input of a transmitting signal and low-density-parity-codes the received signal, and outputs the coded signal; wherein the serial-to-parallel conversion section converts the output coded signal from serial to parallel, and outputs m (m≧2) intermediate signals; wherein the unitary matrix modulation section modulates the output m intermediate signals to a unitary matrix of m rows and m columns where elements excepting diagonal elements are zero, and outputs an obtained matrix; wherein the split section supplies each of the diagonal elements of the output matrix to each input channel of the inverse Fourier transform section as an input signal; wherein the inverse Fourier transform section inversely Fourier transforms the input signals supplied to the input channels, and outputs obtained m inversely Fourier transformed signals; wherein the parallel-to-serial conversion section converts the output m inversely Fourier transformed signals from parallel to serial, and outputs one transmission signal; wherein the transmitting section transmits the output transmission signal; and wherein any of frequency differences between the channels of the inverse Fourier transform section is a predetermined coherent bandwidth or more.