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:
Mar. 21, 2006
Filed:
Jun. 20, 2001
Toshiyuki Akiyama, Tokorozawa, JP;
Nobuo Tsukamoto, Akishima, JP;
Tetsuomi Ikeda, Machida, JP;
Satoshi Okabe, Yokohama, JP;
Toshiyuki Akiyama, Tokorozawa, JP;
Nobuo Tsukamoto, Akishima, JP;
Tetsuomi Ikeda, Machida, JP;
Satoshi Okabe, Yokohama, JP;
Hitachi Kokusai Electric Inc., Tokyo, JP;
Nippon Hoso Kyokai, Tokyo, JP;
Abstract
A transmission apparatus of orthogonal frequency division multiplexing for multiplexing a plurality of carriers orthogonal to one another to transmit a modulated signal. The transmission apparatus includes a first modulator for outputting a code modulated in accordance a modulation scheme which can be applied with a synchronous detection for demodulation, a second modulator for outputting a code modulated in accordance with a modulation scheme different from the modulation scheme associated with the first modulator, and a distributing circuit for distributing the codes modulated by the first and second modulators to a plurality of carriers. The distributing circuit distributes the code modulated by the second modulator to all or some of carriers existing within a predetermined number of columns from at least one of both end regions of a signal transmission frequency band, and the code modulated by the first modulator to the remaining carriers.