The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 2009
Filed:
Dec. 18, 2003
Chang-jun Ahn, Koganei, JP;
Chang-Jun Ahn, Koganei, JP;
Abstract
A coding sectionof a transmitter receives an input of a transmitting signal and LDPC-codes the received signal, a serial-to-parallel conversion sectionconverts the coded signal from serial to parallel, and outputs m (m≧2) intermediate signals, a unitary matrix modulation sectionmodulates 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 sectionsupplies each of the diagonal elements of the matrix to each input channel of an inverse Fourier transform sectionas an input signal, the inverse Fourier transform sectioninversely Fourier transforms the input signals supplied to the input channels, and outputs the obtained m inversely Fourier transformed signals, a parallel-to-serial conversion sectionconverts the m inversely Fourier transformed signals from parallel to serial, and outputs one transmission signal, a transmitting sectiontransmits the output transmission signal, and any of frequency differences between the channels of the inverse Fourier transform sectionis a predetermined coherent bandwidth or more.