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:
Jan. 11, 2011
Filed:
Sep. 30, 2005
Chang-jun Ahn, Tokyo, JP;
Chang-Jun Ahn, Tokyo, JP;
National Institute of Information and Communications Technology, Tokyo, unknown;
Abstract
In a transmission device, a modulation portioncarries out modulation of encoded data based on an adaptive modulation command based on feedback information sent from the receiving side, a frequency symbol diffusion blockmultiplies the plurality of signals outputted by a serial-parallel conversion portionby an orthogonal diffusion code and combines them, a pseudo random-number multiplication portionmultiplies each of them by a pseudo random number, an inverse Fourier transform portionconducts inverse Fourier transform, a parallel-serial conversion portionconducts parallel-serial conversion, a guard interval addition portionadds a guard interval and a transmission portiontransmits a signal so that only one feedback information and modulation level information is required for each frequency symbol diffusion blockand transmission rate can be improved.