US 7,633,850 B2 · Transmitter, receiver, transmitting method, receiving method, and program

Abstract

A coding section 201 of a transmitter receives an input of a transmitting signal and LDPC-codes the received signal, a serial-to-parallel conversion section 102 converts the coded signal from serial to parallel, and outputs m (m≧2) intermediate signals, a unitary matrix modulation section 103 modulates the 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, a split section 111 supplies each of the diagonal elements of the matrix to each input channel of an inverse Fourier transform section 112 as an input signal, the inverse Fourier transform section 112 inversely Fourier transforms the input signals supplied to the input channels, and outputs the obtained m inversely Fourier transformed signals, a parallel-to-serial conversion section 113 converts the m inversely Fourier transformed signals from parallel to serial, and outputs one transmission signal, a transmitting section 114 transmits the output transmission signal, and any of frequency differences between the channels of the inverse Fourier transform section 112 is a predetermined coherent bandwidth or more.

Claims16

Dependent claims

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.

12 more elements

A transmitter comprising:

a coding section:
a serial-to-parallel conversion section;
a plurality of unitary matrix modulation sections;
a split section;
an inverse Fourier transform section;
a parallel-to-serial conversion 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 receives an input of the output coded signal and converts the signal from serial to parallel, and outputs m×n (m≧2, n≧1) intermediate signals;
wherein each of the plurality of unitary matrix modulation sections modulates the output any m of intermediate signals of the output m×n (m≧2, n≧1) intermediate signals without overlaps 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 to which the diagonal elements of the matrix are given from the plurality of unitary matrix modulation sections is a predetermined coherent bandwidth or more, among the channels of the inverse Fourier transform section.

14 more elements

A receiver comprising:

a receiving section;
a serial-to-parallel conversion section;
a Fourier transform section;
an inverse split section;
a plurality of unitary matrix demodulation sections;
a parallel-to-serial conversion section;
and
a decoding section,
wherein the receiving section receives a transmitted transmission signal and outputs the signal as a received signal;
wherein the serial-to-parallel conversion section converts the output received signal from serial to parallel, and outputs m×n (m≧2, n≧1) intermediate signals;
wherein the Fourier transform section Fourier transforms the output m×n intermediate signals, and outputs obtained m×n Fourier transformed signals;
wherein the inverse split section supplies the output m×n Fourier transformed signals to each of the unitary matrix demodulation sections by n without overlaps;
wherein each of the plurality of unitary matrix demodulation sections demodulates, from matrixes of m rows and m columns where each of the supplied m Fourier transformed signals is a diagonal element and elements excepting the diagonal elements are zero, the signals associated with the unitary matrixes of m rows and m columns where elements excepting diagonal elements are zero, and outputs the signals as demodulated signals;
wherein the parallel-to-serial conversion section converts the plurality of modulated signals from parallel to serial, and outputs the signal as a transmitted signal;
wherein the decoding section low-density-parity-codes the output serialized signal, and outputs the signal as a transmitted signal;
and
wherein any of frequency differences between the channels, each from which the Fourier transformed signal given to each of the plurality of unitary matrix modulation sections is output, is a predetermined coherent bandwidth or more, among the channels of the Fourier transform section.

14 more elements

An information storage medium having stored thereon a program, when executed by a computer, for controlling said computer to function a coding section, a serial-to-parallel conversion section, a plurality of unitary matrix modulation sections, a split section, an inverse Fourier transform section, a parallel-to-serial conversion section, and a transmitting section,

said program controls said computer;
to receive an input of a transmitting signal and low-density-parity-codes the received signal, and output the coded signal;
to receive input of the output coded signal and convert the signal from serial to parallel, and output m×n (m>=2, n>=) intermediate signals;
to each modulate the output any m of intermediate signals of the output m×n (m>=2, n>=1) intermediate signals without overlaps to a unitary matrix of m rows and m columns where elements excepting diagonal elements are zero, and output an obtained matrix;
to supply each of the diagonal elements of the output matrix to each input channel of the inverse Fourier transform as an input signal;
to inversely Fourier transform the input signals supplied to the input channels, and output obtained m inversely Fourier transformed signals;
to convert the output m inversely Fourier transformed signals from parallel to serial, and output one transmission signal;
to transmit the output transmission signal;
and any of frequency differences between the channels to which the diagonal elements of the matrix are given from the plurality of unitary matrix modulations is a predetermined coherent bandwidth or more, among the channels of the inverse Fourier transform.

6 more elements

An information storage medium having stored thereon a program when executed by a computer, for controlling said computer to function a receiving section, a serial-to-parallel conversion section, a Fourier transform section, an inverse split section, a plurality of unitary matrix demodulation sections, a parallel-to-serial conversion section, and a decoding section,

said program controls said computer;
to receive, a transmitted transmission signal and output the signal as a received signal;
to convert the output received signal from serial to parallel, and output m×n (m>=2, n>=1) intermediate signals;
to Fourier transform the output m×n intermediate signals, and output, obtained m×n Fourier transformed signals;
to supply the out put m×n Fourier transformed signals to each of the unitary matrix demodulation sections by n without overlaps;
to each demodulate from matrixes of m rows and m columns where each of the supplied m Fourier transformed signals is a diagonal element and elements excepting the diagonal elements are zero, the signals associated with the unitary matrixes of m rows and m columns where elements excepting diagonal elements are zero, and output the signals as demodulated signals;
to convert the plurality of modulated signals from parallel to serial, and output the signal as a transmitted signal;
to low-density-parity-code the output serialized signal, and output the signal as a transmitted signal;
and
any of frequency differences between the channels, each from which the Fourier transformed signal given to each of the plurality of unitary matrix modulations is output, is a predetermined coherent bandwidth or more, among the channels of the Fourier transform.

7 more elements

Dependencies are inferred from the claim text.

Transmitter, receiver, transmitting method, receiving method, and program

Life of this patent

Transmitter, receiver, transmitting method, receiving method, and program

Life of this patent

Abstract

Claims16